Rinnai RL75eP Manual

Rinnai Kedler & kedler RL75eP

Læs nedenfor 📖 manual på dansk for Rinnai RL75eP (94 sider) i kategorien Kedler & kedler. Denne guide var nyttig for 27 personer og blev bedømt med 4.5 stjerner i gennemsnit af 2 brugere

Download PDF

Side 1/94

Direct Vent Tankless Water

Heater Installaon and

Operaon Manual

— Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other

appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor s phone. Follow the gas supplier s instrucons.’ ’

• If you cannot reach your gas supplier, call the re department.

— Installaon and service must be performed by a licensed professional.

This enre manual must be le for the consumer. The consumer must read and

refer to this manual for proper operaon and to maintain the water heater.

If the informaon in these instrucons is not followed exactly, a re or explosion

may result causing property damage, personal injury, or death.

WARNING

READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.

This manual provides informaon on the installaon, operaon, and maintenance of the water heater. For proper

operaon and safety, it is important to follow the instrucons and adhere to the safety precauons.

A licensed professional must install the water heater according to the exact instrucons on pages 4-30.

The consumer must read the enre manual to properly operate the water heater and to have regular maintenance

performed.

ANS Z21.10.3 CSA 4.3●

FOR INDOOR APPLICATIONS ONLY

RL75i ..................... REU VC2528FFUD- -US

-REU VC2528FFUD US(A)-

RLX94i ................... REU VC2737FFUD- -US

RL94i ..................... REU VC2837FFUD- -US

FOR OUTDOOR APPLICATIONS ONLY

RL75e .................... REU VC2528WD- -US

-REU VC2528FFUD US(A)-

RL94e .................... REU VC2837WD- -US

SANITATION

Low Lead Content

NSF/ANSI 372

C US

2 VC Series Manual

Table of Contents

This is the safety alert symbol. This symbol alerts you to potenal hazards that can kill or hurt you

and others.

Indicates an imminently hazardous situaon which, if not avoided, will result in death or

serious injury.

Indicates a potenally hazardous situaon which, if not avoided, could result in death or

serious injury.

Indicates a potenally hazardous situaon which, if not avoided, could result in minor or

moderate injury. It may also be used to alert against unsafe pracces.

DANGER

CAUTION

WARNING

Table of Contents ..................................................... 2

Safety Behaviors and Pracces for the

Consumer and Installer ............................................ 3

Installaon Instrucons

(for the licensed professional) 4 .............................

Prepare for Installaon ...................................... 5

Determine Installaon Locaon ........................ 6

Freeze Protecon ............................................. 11

Checklist to Determine Installaon Locaon ... 12

Mount to Wall.................................................. 12

Remove the Front Panel .................................. 12

Installaon of Venng (indoor models only) ... 13

Condensate (indoor models only).................... 15

Checklist for Venng and Condensate

(indoor models only) ........................................ 15

Installaon of Plumbing ................................... 16

Checklist for Plumbing ..................................... 19

Installaon of Gas Supply ................................ 19

Connect Electricity ........................................... 21

Adjust for High Altude ................................... 21

Adjust for Vent Length (indoor models only) .. 21

Checklist for Gas and Electricity ....................... 21

Installaon of Temperature Controller ............ 22

Final Checklist ................................................... 24

Technical Data ........................................................ 25

Specicaons ................................................... 25

Dimensions....................................................... 26

Pressure Drop and Water Flow Curves ............ 27

Ladder Diagram................................................ 28

Recirculaon Mode .......................................... 29

Operaon Instrucons ....................................... 31

Consumer Operaon Guidelines for the

Safe Operaon of your Water Heater .............. 32

How to Use the Temperature Controller ......... 33

How to Set the Temperature ........................... 34

Diagnosc Codes.............................................. 36

Required Maintenance.....................................39

Freeze Protecon and Winterizaon ........ 40

Flushing the Heat Exchanger..................... 41

Manual Draining of the Water Heater ...... 42

State Regulaons .................................................... 43

Replacement Parts .................................................44

Consumer Warranty ............................................... 45

French Version ........................................................ 48

Important Safety Informaon

Safety Denions

NOTICE: Rinnai somemes shares customer contact informaon with businesses that we believe provide

products or services that may be useful to you. By providing this informaon, you agree that we can

share your contact informaon for this purpose. If you prefer not to have your informaon shared with

these businesses, please contact customer service and ask not to have your informaon shared. We

will however, connue to contact you with informaon relevant to the product(s) you registered and/

or your account with us.

If you have any quesons or feel that the manual is incomplete contact Rinnai at 1 800 621 9419--- .

VC Series Manual 3

CAUTION

• BURN HAZARD. Hot exhaust and vent may cause

serious burns. Keep away from water heater unit.

Keep small children and animals away from the

unit.

• Hot water outlet pipes leaving the unit can be hot

to touch. In residenal applicaons, insulaon

must be used for hot water pipes below due to 36”

burn risk to children.

Safety Behaviors and Pracces for the Consumer and Installer

• Before operang, smell all around the appliance

area for gas. Be sure to smell next to the oor

because some gas is heavier than air and will sele

on the oor.

• Keep the area around the appliance clear and free

from combusble materials, gasoline, and other

ammable vapors and liquids.

• Combusble construcon refers to adjacent walls

and ceiling and should not be confused with

combusble or ammable products and materials.

Combusble and/or ammable products and

materials should never be stored in the vicinity of

this or any gas appliance.

• Always check the water temperature before

entering a shower or bath.

• To protect yourself from harm, before performing

maintenance:

 Turn o the electrical power supply by

unplugging the power cord or by turning o the

electricity at the circuit breaker. (The

temperature controller does not control the

electrical power.)

 Turn o the gas at the manual gas valve, usually

located immediately below the water heater.

 Turn o the incoming water supply. This can be

done at the isolaon valve immediately below

the water heater or by turning o the water

supply to the building.

WARNING

• Use only your hand to push in or turn the gas

control knob. Never use tools. If the knob will not

push in or turn by hand, do not try to repair it; call a

licensed professional. Force or aempted repair

may result in a re or explosion.

• Do not use this appliance if any part has been under

water. Immediately call a licensed professional to

inspect the appliance and to replace any part of the

control system and any gas control which has been

under water.

• Do not use substute materials. Use only parts

cered for the appliance.

• Should overheang occur or the gas supply fail to

shut o, turn o the manual gas control valve to the

appliance.

• Do not adjust the DIP switch unless specically

instructed to do so.

• Do not use an extension cord or an adapter plug

with this appliance.

• Any alteraon to the appliance or its controls can be

dangerous and will void the warranty.

California law requires this noce to be provided:

California Proposion 65:

This product contains chemicals known to the state of California to cause cancer, birth defects, or other

reproducve harm.

WARNING

4 VC Series Manual

It is recommended that a licensed professional install

the appliance, inspect it, and leak test it before use.

The warranty may be voided due to any improper

installaon.

The installer should have skills such as:

• Gas sizing.

• Connecng gas lines, water lines, valves, and

electricity.

• Knowledge of applicable naonal, state, and

local codes.

• Installing venng through a wall or roof.

• Training in installaon of tankless water heaters.

(Training can be accessed on line at -

www.trainingevents.rinnai.us)

Installaon Instrucons

Installaon Steps

Prepare for Installaon ...................................... 5

Determine Installaon Locaon ......................... 6

Checklist to Determine Installaon Locaon ... 12

Mount to Wall.................................................. 12

Remove the Front Panel ..................................12

Installaon of Venng (indoor models only) ... 13

Condensate (indoor models only) .................... 15

Checklist for Venng and Condensate

(Indoor models only)........................................ 15

Installaon of Plumbing ................................... 16

Checklist for Plumbing ..................................... 19

Installaon of Gas Supply................................. 19

Connect Electricity ........................................... 21

Adjust for High Altude ...................................21

Adjust for Vent Length (indoor models only) ..21

Checklist for Gas and Electricity ....................... 21

Installaon of Temperature Controller ............ 22

Final Checklist...................................................24

General Instrucons Installer Qualicaons

DO NOT

• Do not install the RL75i, RL94i, or the RLX94i

outdoors.

• Do not install the RL75e or the RL94e indoors.

• Do not install the appliance in an area where water

leakage of the unit or connecons will result in

damage to the area adjacent to the appliance or to

lower oors of the structure. When such locaons

cannot be avoided, it is recommended that a

suitable drain pan, adequately drained, be installed

under the appliance. The pan must not restrict

combuson air ow.

• Do not obstruct the ow of combuson and

venlaon air. Combuson air shall not be

supplied from occupied spaces.

• Do not use this appliance in an applicaon such as

a pool or spa heater that uses chemically treated

water . (This appliance is suitable for lling large or

whirlpool spa tubs with potable water.)

• Do not use substute parts that are not authorized

for this appliance.

MUST DO

• The installaon must conform with local codes or,

in the absence of local codes, with the Naonal

Fuel Gas Code, ANSI Z223.1/NFPA 54, or the

Natural Gas and Propane Installaon Code, CSA

B149.1. If installed in a manufactured home, the

installaon must conform with the Manufactured

Home Construcon and Safety Standard, Title 24

CFR, Part 3280 and/or CAN/SCA Z240 MH Series,

Mobile Homes.

• The appliance, when installed, must be electrically

grounded in accordance with local codes or, in the

absence of local codes, with the Naonal Electrical

Code, ANSI/NFPA 70, or the Canadian Electrical

Code, CSA C22.1.

• The appliance and its appliance main gas valve

must be disconnected from the gas supply piping

system during any pressure tesng of that system

at test pressures in excess of 1/2 psi (3.5 kPa)

(13.84 in W.C.).

Type of installaon

• For installaon in residenal and commercial

applicaons.

• Cered for installaon in manufactured (mobile)

homes.

VC Series Manual 5

Prepare for installaon

Parts included

Tools needed

Materials needed

• The appliance must be isolated from the gas supply

piping system by closing its individual manual

shuto valve during any pressure tesng of the gas

supply piping system at test pressures equal to or

less than 1/2 psi (3.5 kPa) (13.84 in W.C.).

• You must follow the installaon instrucons and

those in Care and Maintenance for adequate

combuson air intake and exhaust.

INFORMATION

• If a water heater is installed in a closed water

supply system, such as one having a backow

preventer in the cold water supply line, means

shall be provided to control thermal expansion.

Contact the water supplier or local plumbing

inspector on how to control thermal expansion.

• Should overheang occur or the gas supply fail to

shut o, turn o the manual gas control valve to

the appliance.

• Keep the air intake locaon free of chemicals such

as chlorine or bleach that produce fumes. These

fumes can damage components and reduce the life

of your appliance.

• Tankless water heater

• Color coded cold (blue) and hot (red) isolaon

valves

• Pressure relief valve

• MC-91-2 temperature controller (integrated into

indoor models; provided with outdoor models)

• Pipe wrenches (2)

• Adjustable pliers

• Screwdrivers (2)

• Wire cuers

• Gloves

• Safety glasses

• Level

Tools that might be needed

• Hammer drill with

concrete bits

• Saw

• Threading machine with

heads and oiler

• Core drill with diamond

head

• Torch set

• Copper tubing cuer

• Steel pipe cuer

Materials that may be needed

• Soap or gas leak

detector soluon

• Approved venng

• Teon tape

(recommended) or pipe

compound

• Heat tape

• Pipe insulaon

• Electrical wire and

conduit per local code

• Concrete wall anchors

• Oponal pipe cover

• Oponal temperature

controller

• 5/8” ID PVC exible

tubing

• 2 conductor 22 AWG

wire for controller

• Single gang electrical

box

• Wire nuts

• Unions and drain valves

General Instrucons (connued)

6 VC Series Manual

Environment

Air surrounding the water heater, venng, and vent

terminaon(s) is used for combuson and must be free

of any compounds that cause corrosion of internal

components. These include corrosive compounds that

are found in aerosol sprays, detergents, bleaches,

cleaning solvents, oil based paints/ varnishes, and

refrigerants. The air in beauty shops, dry cleaning

stores, photo processing labs, and storage areas for pool

supplies oen contains these compounds. Therefore it

is recommended that outdoor models be used for these

locaons where possible.

The water heater, venng, and vent terminaon(s)

should not be installed in any areas where the air may

contain these corrosive compounds. If it is necessary for

a water heater to be located in areas which may contain

corrosive compounds, the following instrucons are

strongly recommended.

IMPORTANT CONSIDERATIONS FOR:

Indoor/Internal Water Heaters

• DO NOT Install in areas where air for combuson

can be contaminated with chemicals.

• Before installaon, consider where air has the

ability to travel within the building to the water

heater.

• Where possible, install the water heater in a sealed

closet so that it is protected from the potenal of

contaminated indoor air.

• Chemicals that are corrosive in nature should not

be stored or used near the water heater.

Outdoor/External Water Heaters and Vent

Terminaons of Indoor/Internal Water Heaters

• Install the water heater as far away as possible

from exhaust vent hoods.

• Install as far away as possible from air inlet vents.

Corrosive fumes may be released through these

vents when air is not being brought in through

them.

• Chemicals that are corrosive in nature should not

be stored or used near the water heater or vent

terminaon.

Damage and repair due to corrosive compounds in the

air is not covered by warranty.

Consideraon of care for your water heater should

include evaluaon of water quality.

The water must be potable, free of corrosive chemicals,

sand, dirt, or other contaminates. It is up to the

installer to ensure the water does not contain corrosive

chemicals, or elements that can aect or damage the

heat exchanger. Water that contains chemicals

exceeding the levels below aect and damage the heat

exchanger. Replacement of the heat exchanger due to

water quality damage is not covered by the warranty.

Maximum Level

Total Hardness Up to 200 mg / L

Aluminum * Up to 0.2 mg / L

Chlorides * Up to 250 mg / L

Copper * Up to 1.0 mg / L

Dissolved Carbon Dioxide (CO2) Up to 15.0 mg / L or PPM

Iron * Up to 0.3 mg / L

Manganese * Up to 0.05 mg / L

pH * 6.5 to 8.5

TDS (Total Dissolved Solids) * Up to 500 mg / L

Zinc * Up to 5 mg / L

Determine Installaon Locaon

Water Quality

* Source: Part 143 Naonal Secondary Drinking Water

Regulaons

If you install this water heater in an area that is known

to have hard water or that causes scale build-up the

water must be treated and/or the heat exchanger

ushed regularly.

When scale build-up in the heat exchanger begins to

aect the performance of the water heater, a diagnosc

code LC# will display. Flush the heat exchanger to “ ”

prevent damage to it. Scale build up is caused by hard

water set at a high temperature.

Rinnai oers Southeastern Filtraon ScaleCuer ’s “

Water Condioning System that oers superior lime ”

scale prevenon and corrosion control by feeding a

blend of control compounds into the cold water

supply.

You must ensure that clearances will be met and that

the vent length will be within required limits. Consider

the installaon environment, water quality, and need

for freeze protecon. Requirements for the gas line,

water lines, electrical connecon, and condensate

disposal can be found in their respecve installaon

secons of this manual.

Part Number Descripon

103000038 Southeastern Filtratrion

ScaleCuer System Feed3/4”

103000039 ScaleCuer Rell

VC Series Manual 7

[1] A vent shall not terminate directly above a sidewalk or paved driveway that is

located between two single family dwellings and serves both dwellings.

[2] Permied only if veranda, porch, deck, or balcony is fully open on a minimum of

two sides beneath the oor.

 For clearances not specied in , clearances are in ANSI Z223.1/NFPA 54

accordance with local installaon codes and the requirements of the gas supplier.

Clearance to opposite wall is 24 inches (60 cm).

For indoor models, you must install a vent terminaon to bring in combuson air and expel exhaust.

Direct Vent (Indoor Unit) Other than direct vent (Outdoor unit)

Ref

Descripon

Canadian Installaons

(CSA B149.1)

US Installaons

(ANSI Z223.1 / NFPA 54)

Canadian Installaons

(CSA B149.1)

US Installaons

(ANSI Z223.1 / NFPA 54)

A Clearance above grade, veranda, porch, deck, or balcony 12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm)

B Clearance to window or door that may be opened 36 inches (91 cm) 12 inches (30 cm)

6 in (15 cm) for appliances Btuh (3 ≤ 10,000

kW), 12 in (30 cm) for appliances > 10,000

Btuh (3 kW) and Btuh (30 kW), 36 in ≤ 100,000

(91 cm) for appliances >100,000 Btuh (30 kW)

4  (1.2 m) below or to

side of opening; 1  (300

mm) above opening

C Clearance to permanently closed window * * * *

Vercal clearance to venlated sot, located above the

terminal within a horizontal distance of 2 feet (61 cm)

from the center line of the terminal

* * * *

E Clearance to unvenlated sot * * * *

F Clearance to outside corner * * * *

G Clearance to inside corner * * * *

H Clearance to each side of center line extended above

meter/regulator assembly * * * *

I Clearance to service regulator vent outlet

Above a regulator

within 3  (91 cm)

horizontally of the

vercal center line of

the regulator vent

outlet to a maximum

vercal distance of 15

 (4.5 m)

Above a regulator within 3  (91 cm)

horizontally of the vercal center line of the

regulator vent outlet to a maximum vercal

distance of 15  (4.5 m)

J Clearance to nonmechanical air supply inlet to building or

the combuson air inlet to any other appliance 36 inches (91 cm) 12 inches (30 cm)

6 in (15 cm) for appliances Btuh (3 ≤ 10,000

kW), 12 in (30 cm) for appliances > 10,000

Btuh (3 kW) and Btuh (30 kW), 36 in ≤ 100,000

(91 cm) for appliances >100,000 Btuh (30 kW)

4  (1.2 m) below or to

side of opening; 1  (300

mm) above opening

K Clearance to a mechanical air supply inlet 6  (1.83 m)

3  (91 cm) above if

within 10  (3 m)

horizontally

6  (1.83 m) 3  (91 cm) above if within

10 feet (3 m) horizontally

L Clearance above paved sidewalk or paved driveway

located on public property 7  (2.13 m) * 7  (2.13 m) [1] 7 . (2.13 m)

M Clearance under veranda, porch, deck, or balcony 12 inches (30 cm) * 12 inches (30 cm) [2] * 

Terminal Clearances

AIR SUPPLY INLET

VENT TERMINAL

AREA WHERE TERMINAL IS

NOT PERMITTTED

SNOW

TERMINATION

Clearance in

Ref. also A

applies to

anticipated

snow line

8 VC Series Manual

24"

Check to determine whether local codes supersede

these clearances.

• Avoid terminaon locaons near a dryer vent.

• Avoid terminaon locaons near commercial

cooking exhaust.

• You must install a vent terminaon at least 12

inches above the ground.

60"

(1.52 m)

between

terminals at

dierent levels

(0.61 m) to wall or parapet

(0.30 m) between

terminals at same

level

12"

V V

(1.52 m) vercally

between terminals

60"

Addional clearances RL75i, RL94i, RLX94i-

12"

INSIDE

CORNER

V V

(0.30 m ) to

an inside

corner

(0.30 m) between

terminals at same

level

Important consideraons for locang vent

terminaon under a sot (venlated or unvenlated

or eave vent; or to a deck or porch)

• Do not install vent terminaon under a sot vent

such that exhaust can enter the sot vent

• Install vent terminaon such that exhaust and

rising moisture will not collect under

eaves. Discoloraon to the exterior of the

building could occur if installed too close.

• Do not install the vent terminaon too close

under the sot where it could present

recirculaon of exhaust gases back into the

combuson air intake part of the terminaon.

VC Series Manual 9

12"

Local codes supersede these clearances.

• Avoid terminaon locaons near a dryer vent.

• Avoid terminaon locaons near commercial

cooking exhaust.

• Avoid terminaon locaons near any air inlets.

Addional clearances

RL75e, RL94e

(0.30 m) to an

inside corner

(50 mm) between terminals at same level

(1.52 m) vercally

between terminals

(0.91 m) to venlated or unvenlated

sot or eve vent; or to a deck or porch

36 in.

2 in.

12 in.

60 in.

10 VC Series Manual

Unit clearances

* 0 inches from vent components and condensate

drain line.

The clearance for servicing is 24 inches in front of the

water heater.

For closet installaon, clearance is 6 inches (152 mm)

from the front of the water heater.

Indoor models: RL75i, RL94i, RLX94i Outdoor models: RL75e, RL94e

The clearance for servicing is 24 inches in front of the

water heater.

to Combusbles

inches (mm)

to Non-

Combusbles

inches (mm)

Top of Heater 12 (305) 2 (51)

Back of Heater 0 (zero) 0 (zero)

Front (Panel) 24 (610) 0 (zero)

Front (Exhaust) 24 (610) 24 (610)

Sides of Heater 6 (152) 1/8 (3.2)

Ground/Boom 12 (305) 2 (51)

to Combusbles

inches (mm)

to Non-

Combusbles

inches (mm)

Top of Heater 6 * (152) 2 *(51)

Back of Heater 0 (zero) 0 (zero)

Front of Heater 6 (152) 6 (152)

Sides of Heater 2 (51) 1/2 (13)

Ground/Boom 12 (305) 12 (305)

Vent 0 (zero) 0 (zero)

to side

to front

to top

to ground/b tot om

to side

to front

to top

to ground/b tot om

VC Series Manual 11

Freeze Protecon

Make sure that in case of freezing weather that the

water heater and its water lines are protected to

prevent freezing. Damage due to freezing is not

covered by the warranty.

With electrical power and gas supplied, the water

heater will not freeze when the outside air

temperature is as cold as – °F ( 30°C) for indoor 22 -

models or is as cold as – °F ( 20°C) for outdoor 4-

models, when protected from direct wind exposure.

Because of the wind“-chill eect, any wind or ”

circulaon of the air on the unit will reduce its ability

to protect itself from freezing.

In the event of a power failure and/or gas

interrupon at temperatures below freezing the

water heater should be drained of all water to

prevent freezing damage. In addion, drain the

condensate trap and drain line.

Loss of freeze protecon may result in water damage

from a burst heat exchanger or water lines.

The unit may be drained manually. However, it is

highly recommended to:

• drain down solenoid valves be purchased and

installed that will automacally drain the unit if

power is lost. These are available in a kit,

104000059. (The condensate trap is not aected

by the auto drain down solenoid valves and will

have to be manually drained.)

• a surge protector with terminals be purchased

and installed which allows the solenoid valves to

operate if the unit is disabled due to a diagnosc

code. This is available as 104000057.

In addion, the solenoid valves should be connected

electrically to a surge protector with terminals. This

allows the solenoid valves to operate if the water

heater is disabled due to a diagnosc code.

The freeze protecon features will not prevent the

external piping from freezing. It is recommended that

hot and cold water pipes be insulated. Pipe cover

enclosures may be packed with insulaon for added

freeze protecon.

Maximum vent length

(indoor models only)

1. Determine the number of 90 degree elbows in

the vent system. (Two 45 degree elbows count as

one 90 degree elbow.)

2. Refer to the table to nd the maximum vent

length based on the number of elbows.

3. Adjust switch No. 1 in the SW1 DIP switch (tan

switches) required by the applicable note. if

 If the length is greater than 21  (6.4 m) then

move switch No. 1 (SW1) to OFF.

 If the length is greater than 15  (4.6 m) then

move switch No. 1 (SW1) to OFF.

 If the length is greater than 9  (2.7 m) then move

switch No. 1 (SW1) to OFF.

 Move switch No. 1 (SW1) to OFF.

Example: If you have one elbow then your maximum

vent length is 35 feet (10.7 m). If your

actual length is greater than 15  (4.6 m)

then move switch no. 1 (SW1) to OFF.

Number of

90° Elbows

Maximum vent length

0 41  (12.5 m) 

1 35  (10.7 m) 

2 29  (8.8 m) 

3 23  (7.0 m) 

4 17  (5.2 m) 

5 11  (3.4 m) 

6 5  (1.5 m) 

If you have a longer vent length (see number 3

regarding max. vent length), switch No. 1 is required

to be in the OFF posion. This ensures the water

heater will run properly. Blocked ue diagnosc

codes and shutdowns may result if switch No. 1 is not

in the correct posion.

NOTICE

12 VC Series Manual

Mount to Wall

wall installaon

brackets

1. Idenfy the installaon locaon and conrm that

the installaon will meet all required clearances.

2. Securely aach the water heater to the wall

using any of the holes in the wall installaon

brackets which are at the top and boom of the

water heater. Ensure that the aachment

strength is sucient to support the weight.

Refer to the weight of the water heater in the

Specicaons secon.

Use a leveling tool to ensure that the water

heater is level. Proper operaon requires that

the water heater be level.

NOTE: The water heater must be installed in an

upright posion. Do not install upside down or on its

side.

Checklist to Determine Installaon

Locaon

□ The water heater is not exposed to corrosive

compounds in the air.

□ The water heater locaon complies with the

clearances.

□ For indoor models, the planned venng will not

exceed the maximum length for the number of

elbows used.

□ The planned venng terminaon/air intake

locaon meets the clearances.

□ Indoor air is not being used for combuson.

□ The water supply does not contain chemicals or

exceed total hardness that will damage the heat

exchanger.

□ A standard 3 prong 120 VAC, 60 Hz properly

grounded wall outlet (for indoor models) or other

120 VAC, 60 Hz source is available.

□ The installaon must conform with local codes or,

in the absence of local codes, with the Naonal

Fuel Gas Code, ANSI Z223.1/NFPA 54, or the

Natural Gas and Propane Installaon Code, CSA

B149.1. If installed in a manufactured home, the

installaon must conform with the Manufactured

Home Construcon and Safety Standard, Title 24

CFR, Part 3280 and/or CAN/SCA Z240 MH Series,

Mobile Homes.

□ Leave the enre manual taped to the water

heater (indoor models), temperature controller

(outdoor models), or give the enre manual

directly to the consumer.

Remove the Front Panel

Slide the plasc trim pieces on each side of the water

heater to expose the screws.

Remove the 4 screws and pull o the front panel.

VC Series Manual 13

Manufacturer Listed and Tested Vent Products

for RL75i, RL94i, and RLX94i Telephone Fax Contact

Ubbink Rolux Vent System www.rinnai.us 800-621-9419 678-829-1666

Heat Fab Saf T Vent SC system- - 800-772-0739 413-863-4803 custsvc@heat fab.com, -

www.heaab.com

Metal Fab Corr/Guard Vent/Air Intake System- 800-835-2830 316-943-2717 info@mtlfab.com,

www.metal fabinc.com-

Installaon of venng (indoor models only)

Install the correct venng for your model according to the venng manufacturer s instrucons and the ’

guidelines below.

Refer to the manufacturer s technical literature for specic part numbers and instrucons. ’

Venng Guidelines

DO NOT

• Do not use PVC, CPVC, ABS or galvanized material

to vent this appliance.

• Do not combine vent components from dierent

manufacturers.

• Vent diameter must not be reduced.

• Do not connect the venng system with an

exisng vent or chimney.

• Do not common vent with the vent pipe of any

other water heater or appliance.

MUST DO

• This water heater is a direct vent water heater and

therefore is cered and listed with the vent

system. You must use vent components that are

cered and listed with the water heater model.

• The vent system must vent directly to the outside

of the building and use outside air for combuson.

• Avoid dips or sags in horizontal vent runs by

installing supports per the vent manufacturer’s

instrucons.

• Support horizontal vent runs every four feet and

all vercal vent runs every six feet or in

accordance with local codes.

• Venng should be as direct as possible with a

minimum number of pipe ngs.

• Vent connecons must be rmly pressed together

so that the gaskets form an air ght seal.

• The vent piece connected to the water heater

must be secured with one self tapping screw.-

INFORMATION

• Refer to the instrucons of the vent system

manufacturer for component assembly

instrucons.

• If the vent system is to be enclosed, it is suggested

that the design of the enclosure shall permit

inspecon of the vent system. The design of such

enclosure shall be deemed acceptable by the

installer or the local inspector.

NOTICE

If it becomes necessary to access an enclosed vent

system for service or repairs, Rinnai is not responsible

for any costs or dicules in accessing the vent

system. The warranty does not cover obtaining

access to a vent system in an enclosed environment.

14 VC Series Manual

Flue Installaon (indoor models only)

Vercal Terminaon

(condensate collector must be used in all installaons)

3 in (75 mm)

minimum

3 in (75 mm)

minimum

Horizontal Terminaon using Condensate Collector

3 in (75 mm)

minimum

Condensate

Trap

To adjust the condensate collector posion or to

replace the female vent top with a male vent top:

1. Loosen the 4 screws at the rear bracket

2. Slide the bracket away from the female vent top.

3. Remove the 4 screws aaching the female vent top

to the water heater.

4. Li up the female vent top and reposion as desired

(or replace with a male vent top).

5. Install the 4 screws at the vent top and ghten the 4

screws at the bracket.

Secure the rst vent component to the water heater

with one self-tapping screw at the hole located above

the condensate collector.

Bracket

Condensate Collector

Securing Screw

Horizontal Terminaon without using the Condensate Collector

Maximum Height *

5 feet (1.52 m)

Regions of cold climate will create more

condensate in the vent system. The

condensate collector should be used in

cold climates.

If more than one elbow is used in the

vercal secon the condensate collector

must be used.

* The condensate collector must be used in

horizontal terminaons if a vercal rise in

the vent system exceeds 5.

If the condensate collector is not used, the drain pipe must

be capped to prevent exhaust gases and condensate from

entering the building. The cap is supplied on the appliance.

In such an instance slope the venng per foot away 1/4”

from appliance according to vent manufacturer’s

installaon instrucons.

WARNING

Install the venng terminaon according to the diagrams and instrucons below.

Slope the venting per foot toward 1/4”

the appliance according to the vent

manufacturers installation instructions.

Dispose of condensate per local codes.

VC Series Manual 15

Condensate

(indoor models only)

Condensate can form in the vent of high eciency

direct vent appliances. Without proper drainage,

condensate will damage the heat exchanger.

To prevent condensate damage, follow these

instrucons.

DO NOT

• Do not allow condensate to enter the water

heater.

• Do not connect the condensate drain pipe directly

to the rain sewer.

• Do not connect the condensate drain line with an

air condioning evaporator coil drain or.

• Do not connect the condensate drain line to the

pressure relief valve/line of the appliance.

MUST DO

• Use only venng that is approved and idened as

acceptable for your parcular model.

• For vercal terminaons, install a condensate drain

and trap as close as possible to the appliance.

• Slope the venng toward the appliance according

to the vent manufacturer s installaon ’

instrucons.

• All condensate must drain and be disposed of

according to local codes.

• Use only corrosion resistant materials for the

condensate drain lines such as PVC pipe or plasc

hose.

• The condensate drain pipe (along its enre length)

must be at least the same diameter as the drain

line, (5/8 inch NPT).

• The end of the condensate drain pipe should be

open to the atmosphere. The end should not be

under water or other substances.

• To minimize freezing of the condensate, run the

condensate drain line through an interior wall or

between insulaon and an interior wall.

• The condensate collector should be used for all

combinaon domesc/hydronic heang

applicaons.

Checklist for Venng and

Condensate (indoor models only)

□ Verify proper clearances around the vent

terminaons and air intakes.

□ Ensure you have used the correct venng

products for the model installed and that you

have completely followed the venng

manufacturer s installaon instrucons and these ’

installaon instrucons.

□ Verify that the vent pipe has a downward slope or

grade to the outside of 1/4 inch per foot (1.2 ) °

OR if the vent pipe is sloped toward the water

heater (as some local codes require), that a

condensate collector is installed to allow

condensaon to drain away from the water

heater to a proper drain source.

□ Verify that condensate will not be allowed to

drain back into the water heater.

□ Verify that the vent system does not exceed the

maximum length for the number of elbows used.

INFORMATION

• A condensate trap is available, P/N 222053.

• Regions of cold climate will create more

condensate in the vent system. The condensate

collector should be used in cold climates.

• The condensate drain pipe should be as short as

possible and have a downward pitch.

16 VC Series Manual

Installaon of Plumbing

A manual water control valve must be placed in the

water inlet connecon to the water heater before it is

connected to the water line. Unions may be used on

both the hot and cold water lines for future servicing

and disconnecon of the unit.

DO NOT

• Do not introduce toxic chemicals such as those

used for boiler water treatment to the potable

water used for space heang.

MUST DO

• The piping (including soldering materials) and

components connected to this appliance must be

approved for use in potable water systems.

• Purge the water line to remove all debris and air.

Debris will damage the water heater.

• If the appliance will be used as a potable water

source, it must not be connected to a system that

was previously used with a nonpotable water

heang appliance.

• Ensure that the water lter on the water heater is

clean and installed.

Piping Requirements

Pressure Relief Valve Requirements

Install the pressure relief valve according to these

instrucons.

An approved pressure relief valve is required by the

American Naonal Standard (ANSI Z21.10.3) for all

water heang systems and shall be accessible for

servicing.

DO NOT

• Do not plug the relief valve and do not install any

reducing ngs or other restricons in the relief

line. The relief line should allow for complete

drainage of the valve and the line.

• Do not place any other type valve or shuto device

between the relief valve and the water heater.

MUST DO

• The relief valve must comply with the standard for

Relief Valves and Automac Gas Shuto Devices for

Hot Water Supply Systems ANSI Z21.22 and /or the

standard Temperature, Pressure, Temperature and

Pressure Relief Valves and Vacuum Relief Valves,

CAN1 4.4-.

• The relief valve must be rated up to 150 psi and to

at least the maximum BTU/hr of the appliance.

• The discharge from the pressure relief valve should

be piped to the ground or into a drain system per

local codes.

• The pressure relief valve must be manually

operated once a year to check for correct

operaon.

• The relief valve should be added to the hot water

outlet line and near the hot water outlet according

to the manufacturer’s instrucons. DO NOT place

any other type valve or shut o device between

the relief valve and the water heater.

INFORMATION

• If a relief valve discharges periodically, this may be

due to thermal expansion in a closed water supply

system. Contact the water supplier or local

plumbing inspector on how to correct this

situaon. Do not plug the relief valve.

• The American Naonal Standard (ANSI Z21.10.3)

does not require a combinaon temperature and

pressure relief valve for this appliance. However,

local codes may require a combinaon

temperature and pressure relief valve.

Isolaon Valves

Isolaon valves are included with this water heater.

Rinnai strongly recommends the installaon of

isolaon valves on the cold and hot water lines

because they provide the ability to isolate the water

heater from the structure s plumbing and allow quick ’

access to ush the heat exchanger. Flushing the heat

exchanger regularly is required as part of the proper

maintenance for this water heater.

Water discharged from the pressure relief valve could

cause severe burns instantly or death from scalds.

WARNING

VC Series Manual 17

Isolaon Valves and Pressure Relief Valve

Pressure Relief Valve (PRV) Installaon Instrucons:

The PRV must be connected to the 3/4” threaded port on the HOT (RED) water service valve (will be adjacent to

or above the shut o, never below). Installaon must maintain a ¾ port size with no shut o valve or line ”

restricon in-between the appliance and the PRV. The discharge line from the PRV should pitch downward and

terminate above drains where discharge will be clearly visible. The discharge end of the line shall be plain 6”

( ) and a minimum of ¾unthreaded ” in diameter. The discharge line material must be suitable for water at least

180° Fahrenheit. No valve of any type may be installed in the discharge line of the pressure relief valve.

Pressure Relief Valve Maintenance:

For proper care of this approved pressure relief valve, it is recommended that the valve is manually operated

once a year. In doing so, it will be necessary to take precauons with regard to the discharge of potenally

scalding hot water under pressure. Ensure discharge water has a safe place to ow. Contact with your body or

other property may cause damage or harm.

Please note that only the PRV in this package is cered by CSA Internaonal as an approved item.

The isolaon valves provide the ability to isolate the water heater from the structure s plumbing and allow quick ’

access to ush the heat exchanger. Check with local codes to determine if a pressure and temperature relief

valve is required. The included valves meet American Naonal Standard (ANSI Z21.10.3) / Canadian Standard

(CSA 4.3) and are ANSI/NSF 61 approved for potable water.

Isolaon Valves Installaon Instrucons:

1. Wrap the threaded end of the approved pressure relief valve with a minimum of 5 wraps of Teon® tape.

2. Install the pressure relief valve to the threaded port on the HOT (RED) water service valve (will be 3/4”

adjacent to or above the cut o, never below). See Pressure Relief Valve Secon for proper installaon

requirements.

3. Posion the Hot Isolaon Valve (Red) below the Hot Outlet side of the water heater.

4. Hand ghten the Swivel Nut of the Hot Isolaon Valve (Red) to the Hot Outlet side of the water heater.

5. Rotate the Drain Valve to an accessible posion. With a wrench, ghten the Swivel Nut to the water heater.

6. -Repeat steps 3 5 for the Cold Isolaon Valve (Blue).

7. Connect the Cold Isolaon Valve (Blue) to the Cold Water Supply Line.

8. Connect the Hot Isolaon Valve (Red) to the Hot Water Supply Line.

9. Ensure that both Drain Valves are in the closed posion before turning on water supply.

Cold Inlet

Swivel Nut (Integrated Gasket)

Drain Valve

Cold Isolaon Valve

(Blue)

Hot Isolaon Valve

(Red)

Hot Outlet

Pressure

Relief Valve

18 VC Series Manual

Piping Diagram for Basic Installaon

GasSup

ply

3/4"C

oldWat

rSupply

Line

3/4" Hot Water Supp Lily ne

W er He erat at

3/4"G

asConne

ction

For Building Fixtures

Pressure Relief Valve

3/4" Ball Valve

3/4" Union

Check Valve

Pressure Regulator

Circulating Pump

Solenoid Valve

Boiler Drain Valve

KEY This is not an engineered drawing. It is intended only as a guide and not

as a replacement for professionally engineered project drawings. This

drawing is not intended to describe a complete system. It is up to the

contractor/engineer to determine the necessary components and

configuration of the particular system being installed. This drawing does

not imply compliance with local building code requirements. It is the

responsibility of the contractor/engineer to ensure installation is in

accordance with all local building codes. Confer with local building

officials before installation.

VC Series Manual 19

Connect Water Heater to Water Supply

Water connecons to the tankless water heater

should follow all state and local plumbing codes.

If this is a standard installaon, refer to the Piping

Diagram for Basic Installaon.

1. Plumb water supply to the tankless water heater

on the MNPT connecon at the boom of 3/4”

the unit marked Water Inlet which is the cold “ ”,

water supply.

2. Plumb the building hot water supply to the 3/4”

MSPT connecon marked Water Outlet which “ ”,

is the hot water supply.

If a pipe cover will be installed, make sure water lines

to the water heater t.

Checklist for Plumbing

□ Purge the water line of all debris and air by

closing the hot isolaon valve and opening the

cold isolaon valve and its drain. Debris will

damage the water heater. Use a bucket or hose

if necessary.

□ Ensure that hot and cold water lines are not

crossed to the unit and are leak free.

□ Ensure that a pressure relief valve is installed with

a rang that exceeds the BTU input of the water

heater model. Refer to the rang plate on the

side of the water heater for BTU input.

□ Clean the inlet water lter by closing the cold and

hot water inlet isolaon (shut o) valves. Put a -

bucket under the lter at the boom of the water

heater to catch any water that is contained inside

the unit. Unscrew the water lter. Rinse the

lter to remove any debris. Install the lter and

open the isolaon valves.

□ Check for proper water pressure to the water

heater. Minimum/Maximum water pressure is

20-150 psi. Rinnai recommends 30 80 psi for -

maximum performance.

Installaon of Gas Supply

MUST DO

• A manual gas control valve must be placed in the

gas supply line to the water heater. A union can be

used on the connecon above the shut o valve

for the future servicing or disconnecon of the

unit.

• Check the type of gas and the gas inlet pressure

before connecng the water heater. If the water

heater is not of the gas type that the building is

supplied with, DO NOT connect the water heater.

Contact the dealer for the proper unit to match the

gas type.

• Check the gas supply pressure immediately

upstream at a locaon provided by the gas

company. Supplied gas pressure must be within

the limits shown in the Specicaons secon of

this manual with all gas appliances operang.

• Before placing the appliance in operaon, all joints

including the heater must be checked for gas

ghtness by means of leak detector soluon, soap

and water, or an equivalent nonammable

soluon, as applicable. (Since some leak test

soluons, including soap and water, may cause

corrosion or stress cracking, the piping shall be

rinsed with water aer tesng, unless it has been

determined that the leak test soluon is non-

corrosive.)

• Use approved connectors to connect the unit to

the gas line. Purge the gas line of any debris

before connecon to the water heater.

General Instrucons

WARNING

1. A licensed professional must install the gas

supply.

2. Turn o 120v power supply.

3. Turn o the gas.

4. Gas is ammable. Do not smoke or provide other

ignion sources while working with gas.

5. Do not turn on the water heater or gas unl all

fumes are gone.

20 VC Series Manual

Size the gas pipe

The gas supply must be capable of handling the enre

gas load required at the locaon. Gas line sizing is

based on gas type, the pressure drop in the system,

the gas pressure supplied, and gas line type. For gas

pipe sizing in the United States, refer to the Naonal

Fuel Gas Code, NFPA 54. The below informaon is

provided as an example. The appropriate table from

the applicable code must be used.

1. For some tables, you will need to determine the

cubic feet per hour of gas required by dividing the

gas input by the heang value of the gas

(available from the local gas company). The gas

input needs to include all gas products at the lo-

caon and the maximum BTU usage at full load

when all gas products are in use.

2. Use the table for your gas type and pipe type to

nd the pipe size required. The pipe size must be

able to provide the required cubic feet per hour

of gas or the required BTU/hour.

Example:

The heang value of natural gas for your locaon is

1000 BTU/FT3. The gas input of the RL94i is 199,000

BTU/HR. Addional appliances at the locaon require

65,000 BTU/hr. Therefore the cubic feet per hour =

(199,000 + 65,000) / 1000 = 264 FT3/HR. If the pipe

length is 10 feet then the 3/4 inch pipe size is capable

of supplying 264 FT3/HR of natural gas.

Gas Input of all gas products (BTU / HR)

Heang Value of Gas (BTU / FT 3 )

Cubic Feet

per Hour =

(CFH)

• Any compound used on the threaded joint of the

gas piping shall be a type that resists the acon of

liqueed petroleum gas (propane / LPG).

• The gas supply line shall be gas ght, sized, and so

installed as to provide a supply of gas sucient to

meet the maximum demand of the heater and all

other gas consuming appliances at the locaon

without loss of pressure.

INFORMATION

• Refer to an approved pipe sizing chart if in doubt

about the size of the gas line.

Length

Pipe Size (inches)

3/4 1 1 1/4 1 1/2

10 273 514 1060 1580

20 188 353 726 1090

30 151 284 583 873

40 129 243 499 747

50 114 215 442 662

60 104 195 400 600

70 95 179 368 552

80 89 167 343 514

90 83 157 322 482

100 79 148 304 455

Pipe Sizing Table Natural Gas-

Inlet Pressure: less than 2 psi (55 inches W.C.)

Pressure Drop: 0.3 inches W.C.

Specic Gravity: 0.60

Schedule 40 Metallic Pipe

cubic feet per hour

Length

Pipe Size (inches)

1/2 3/4 1 1 1/4

10 291 608 1150 2350

20 200 418 787 1620

30 160 336 632 1300

40 137 287 541 1110

50 122 255 480 985

60 110 231 434 892

80 101 212 400 821

100 94 197 372 763

Pipe Sizing Table Propane Gas-

Inlet Pressure: 11.0 inches W.C.

Pressure Drop: 0.5 inches W.C.

Specic Gravity: 1.50

Schedule 40 Metallic Pipe

Capacity in Thousands of BTU per Hour

VC Series Manual 21

Connect Electricity

Do not rely on the gas or water piping to ground the

water heater. A screw is provided in the juncon box

for the grounding connecon.

The water heater requires 120 VAC, 60 Hz power from

a properly grounded circuit.

If using the 5 foot long power cord, plug it into a

standard 3 prong 120 VAC, 60 Hz properly grounded

wall outlet.

On outdoor models, a disconnect switch must be

provided and installed for the incoming 120 VAC

power. It should be a type that is suitable for outdoor

use. Check the Naonal Electrical Code, ANSI/NFPA

70 and your local codes for a proper switch type to

use in your area.

The wiring diagram is located on the Technical Sheet

aached to the inside of the front cover.

WARNING

Do not use an extension cord or an adapter plug with

this appliance.

The water heater must be electrically grounded in

accordance with local codes and ordinances or, in the

absence of local codes, in accordance with the

Naonal Electrical Code, ANSI/NFPA No. 70.

Indoor water heaters are equipped with a three-

prong (grounding) plug for your protecon against

shock hazard and should be plugged directly into a

properly grounded three prong receptacle. Do not -

cut or remove the grounding terminal from this plug.

Checklist for Gas and Electricity

□ A manual gas control valve is placed in the gas

line to the water heater.

□ Check the gas lines and connecons for leaks.

□ Conrm that the gas inlet pressure is within

limits.

□ Conrm that the water heater is rated for the gas

type supplied.

□ Conrm that the electricity is supplied from 120

VAC, 60 Hz power source and is in a properly

grounded circuit.

□ Conrm an extension cord or an adapter plug has

not been used with the water heater.

□ For indoor models verify that switch No. 1 in the

SW1 DIP switch (tan switches) has been adjusted

for vent length if necessary. Refer to the secon

on Maximum Vent Length.

Adjustment for High Altude

Installaons

On the SW1 DIP switch (tan switches), set switches 2

and 3 to the values shown in table below for your

altude. The default seng for the appliance is 0-

2000  (0 610 m) with switches No. 2 and No. 3 in the -

OFF posion.

When the DIP switch is adjusted, it is not necessary to

adjust the gas pressure seng for high altude.

Altude

SW1

Switch

No. 2

SW1

Switch

No. 3

0 2000  (0 610 m)- - OFF OFF

2001 5200  (610 1585 m)- - OFF ON

5201 7700  (1585 2347 m)- - ON OFF

7701 10200  (2347 3109 m)- - ON ON

Adjustment for Vent Length

(Indoor models only)

Adjust switch No. 1 in the SW1 DIP switch (tan

switches) required. Refer to the secon Maximum if “

vent length”.

22 VC Series Manual

Installaon of Temperature Controller

Controller Locaon

Cable Lengths and Sizes

• The controller should be out of reach of small

children.

• Avoid locaons where the controller may become

hot (near an oven or radiant heater).

• Avoid locaons in direct sunlight. The digital

display may be dicult to read in direct sunlight.

• Avoid locaons where the temperature controller

could be splashed with liquids.

• Do not install in locaons where the controller

can be adjusted by the public.

Indoor models have their controller built into the

front panel. Addional controllers can be installed.

The cable for the temperature controller should be a

non polarized two core cable with a minimum gauge - -

of 22 AWG. The maximum cable length from each

controller to the water heater depends on the total

number of wired controllers connected to the water

heater.

Number of Wired

Controllers

Maximum Cable Length for each

Controller to Water Heater

1 328  (100 m)

2 164  (50 m)

3 or 4* 65  (20 m)

Turn the power o. Do not aempt to connect the

temperature controller(s) with the power on.

Although the controller is a low voltage device, there

is 120 volt potenal next to the temperature

controller connecons inside the unit.

Do not connect the temperature controller to the

120VAC terminals provided for the oponal solenoid

drain valves.

WARNING Conguraons

A maximum of 4 temperature controllers can be

installed for a water heater or bank of water heaters.

This includes the controller built into an indoor water

heater. Controllers can only be wired in parallel.

Controllers cannot be wired in series.

The 4 temperature controllers can consist of mulple

MC-91- - -2 or MCC 91 2 but only one BC-100V and only

one MC 100V. -

(MC 1 should not be installed on a unit that -91-

already has an MC 2 connected)-91-

The clock funcon on the BC 100V will only be -

available if an MC 100V is also connected. -

If 4 MC-91-2 s are installed, simultaneously press the ’

Priority and On/O buons on the fourth controller

unl a beep sounds.

Wire controllers in parallel

Maximum 4 Controllers

Rinnai

Water

Heater

* Only 3 addional controllers can be wired to the

indoor water heater.

VC Series Manual 23

Mounng the controller

1. Make three holes in the wall as shown.

2. Run the cable between the controller and the

water heater or the controller and another

controller.

3. Remove the face plate from the temperature

controller using a screwdriver.

4. Connect the cable to the temperature controller.

5. Mount the controller to the wall using the holes

drilled in step 1.

6. Disconnect the power from the water heater.

7. Remove the plasc cover from the PCB and

electrical connecons.

8. Thread the cable through the access hole at the

base of the unit and connect the wires to the

controller terminals on the right hand side boom

of the PCB.

9. Secure the controller cable using the clamp

provided.

10. Replace plasc cover over PCB and then replace

the cover of the water heater.

Outline of Remote

securing screw

1-21/32"

3-5/16"

securing screw

wiring hole

24 VC Series Manual

Final Checklist

□ The water heater is not subject to corrosive

compounds in the air.

□ The water supply does not contain chemicals or

exceed total hardness that will damage the heat

exchanger.

□ Clearances from the water heater unit are met.

□ Clearances from the vent terminaon / air intake

are met.

□ For indoor models, ensure you have used the

correct venng products for the model installed

and that you have completely followed the

venng manufacturer s installaon instrucons ’

and these installaon instrucons.

□ For indoor models, verify that the vent system

does not exceed the maximum length for the

number of elbows used.

□ For indoor models verify that switch No. 1 in the

SW1 DIP switch (tan switches) has been adjusted

for vent length if necessary. Refer to the secon

on Maximum Vent Length.

□ For indoor models, verify that the vent pipe has a

downward slope or grade to the outside of 1/4

inch per foot (1.2 ) OR, if the vent pipe is sloped °

toward the water heater (as some local codes

require), that a condensate collector is installed

to allow condensaon to drain away from the

water heater to a proper drain source.

□ For indoor models, verify that condensate will not

be allowed to drain back into the water heater.

□ Purge the water line of all debris and air by

closing the hot isolaon valve and opening the

cold isolaon valve and its drain. Debris will

damage the water heater. Use a bucket or hose

if necessary.

□ Ensure that hot and cold water lines are not

crossed to the unit and are leak free.

□ Clean the inlet water lter by closing the cold and

hot water inlet isolaon (shut o) valves. Put a -

bucket under the lter at the boom of the water

heater to catch any water that is contained inside

the unit. Unscrew the water lter. Rinse the

lter to remove any debris. Install the lter and

open the isolaon valves.

□ Ensure that a pressure relief valve is installed with

a rang that exceeds the BTU input of the water

heater model. Refer to the rang plate on the

side of the water heater for BTU input.

□ A manual gas control valve has been placed in the

gas line to the water heater.

□ Check the gas lines and connecons for leaks.

□ Conrm that the gas inlet pressure is within

limits.

□ Conrm that the water heater is rated for the gas

type supplied.

□ Conrm that the electricity is supplied from a 120

VAC, 60 Hz power source, is in a properly

grounded circuit, and turned on.

□ Verify the temperature controller is funconing

properly.

□ Verify that switches No. 2 and No. 3 in the SW1

DIP switch (tan switches) is set correctly for your

altude.

□ Verify the system is funconing correctly by

connecng your manometer to the gas pressure

test port on the water heater. Operate all gas

appliances in the home or facility at high re. The

inlet gas pressure at the water heater must not

drop below that listed on the rang plate.

□ DO NOT introduce toxic chemicals such as those

used for boiler water treatment to the potable

water used for space heang.

□ If the water heater is not needed for immediate

use, then drain the water from the heat

exchanger.

□ Install the front panel.

□ Explain to the customer the importance of not

blocking the vent terminaon or air intake.

□ Explain to the customer the operaon of the

water heater, safety guidelines, maintenance, and

warranty.

□ The installaon must conform with local codes or,

in the absence of local codes, with the Naonal

Fuel Gas Code, ANSI Z223.1/NFPA 54, or the

Natural Gas and Propane Installaon Code, CSA

B149.1. If installed in a manufactured home, the

installaon must conform with the Manufactured

Home Construcon and Safety Standard, Title 24

CFR, Part 3280 CAN/SCA Z240 MH Series, and/or

Mobile Homes.

□ Inform the consumer if the isolaon valves are

not installed or if a water soening system is not

installed.

□ Leave the enre manual taped to the water

heater (indoor models), temperature controller

(outdoor models), or give the enre manual

directly to the consumer.

VC Series Manual 25

Technical Data

Specicaons

* Minimum ow may vary slightly depending on the temperature seng and the inlet water temperature.

Minimum acvaon ow is 0.4 GPM (1.5 L/min).

Our products are connually being updated and improved; therefore, specicaons are subject to change without prior noce.

The maximum inlet gas pressure must not exceed the value specied by the manufacturer. The minimum value listed is for the

purpose of input adjustment.

RL75i RLX94i RL94i RL75e RL94e

Minimum Gas Consumpon Btu/h 10,300

Maximum Gas Consumpon Btu/h 180,000 192,000 199,000 180,000 199,000

Hot water capacity (Min Max) *- 0.26 7.5 GPM-

(1.0 28.5 L/min)-

0.26 9.8 GPM-

(1.0 37.0 L/min)-

0.26 9.8 GPM-

(1.0 37.0 L/min)-

0.26 7.5 GPM-

(1.0 28.5 L/min)-

0.26 9.8 GPM-

(1.0 37.0 L/min)-

Temperature Seng (no controller) 120° F (49° C) or 140° F (60° C)

Maximum Temp Seng (residenal) Selectable at 120° F (49° C) or at 140° F (60° C)

Maximum Temp Seng

(MCC 91 controller)- 160° F (71° C) 185° F (85° C) 185° F (85° C) 160° F (71° C) 185° F (85° C)

Minimum Temperature Seng 98° F (37° C)

Weight 45.6 lb (20.7 kg) 46.3 lb (21.0 kg) 46.3 lb (21.0 kg) 43.6 lb (19.8 kg) 44.3 lb (20.1 kg)

Noise level 49 dB (excluding start up or shutdown)

Electrical Data

Normal 76 W 97 W 97 W 57 W 65 W

Standby 2 W

An- frost Protecon 120 W 104 W

Max Current Without recirculaon pump: 4 A

With recirculaon pump: 8 A (exact value depends on the pump)

Fuse 10 A

By- Pass Control Fixed Electronic Electronic Fixed Electronic

Gas Supply

Pressure

Natural Gas 4.0 10.5 inch W.C. -

Propane 8.0 13.5 inch W.C. -

Type of Appliance Direct Vent, Tankless, Temperature controlled connuous ow gas hot water system

Connecons Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT

Ignion System Direct Electronic Ignion

Electric Connecons Appliance: AC 120 Volts, 60Hz.

Temperature Controller: DC 12 Volts (Digital)

Water Temperature Control Simulaon Feedforward and Feedback

Water Supply Pressure Minimum Water Pressure: 20 PSI (Recommended 30 80 PSI for maximum performance) -

Maximum Water Supply Pressure 150 PSI

Temperature Control Cable Non Polarized Two Core Cable (Minimum 22 AWG) -

Cered for installaon in

manufactured (mobile) homes Yes

Complies with South Coast Air Quality

Management District 14 ng/J or 20

ppm NOx emission levels

Yes Yes Yes Yes No

26 VC Series Manual

E F G

Dimensions

RL75i, RL94i, RLX94i

RL75e, RL94e

0.4~1.8(10~45) Variable

14.04 (356.6)

22.95 (583)

9.27 (235.5)

5.05 (128.1)

2.67 (67.8)

9.27 (235.5)

22.95 (583)

0.28 (7.2) 0.59 (15)

14.04 (356.6)

1.14 (29) 2.23 (56.6)

DIMENSION DIMENSION Inches (mm) Inches (mm)

A (GAS) D 1.31 (33.2) 4.33 (110)

A (COLD) E 1.93 (49) 2.89 (73.3)

A (HOT) F 1.35 (34.4) 1.85 (47)

B G 4.21 (106.9) 3.44 (87.3)

C 1.17 (29.8)

Inches (millimeters)

8.90 (226)

E F G

DIMENSION DIMENSION Inches (mm) Inches (mm)

A (GAS) D 1.31 (33.2) 4.33 (110)

A (COLD) E 1.93 (49) 2.91 (73.8)

A (HOT) F 1.35 (34.4) 1.61 (40.8)

B G 3.96 (100.7) 2.87 (73)

C 1.17 (29.8)

VC Series Manual 27

100

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

45.00

50.00

55.00

60.00

01234567891011

Pressure Drop Curve

RL94, RLX94

RL75

Pressure Loss ( head)

Water Flow (gpm)

Pressure Loss (psi)

Water Flow Curve

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

0 25 50 125 15075 100

Water Flow (gpm)

delta T Temperature Rise (° F)-

RL94

RL75

RLX94i

28 VC Series Manual

Ladder Diagram

VC Series Manual 29

Recirculaon Mode

The Rinnai water heater has the ability to control a

recirculaon pump. Two modes are available,

Economy and Comfort, which recirculate the water in

the plumbing system to provide hot water more

quickly when a tap is opened.

Recirculaon mode is for residenal installaons only.

Recirculaon mode cannot be used with the Bath Fill

controller (BC-100V), an air handler, or with mulple

Rinnai water heaters.

The maximum Rinnai temperature seng while in

recirculaon mode is 140°F (60°C).

Pump Requirements

Voltage: 120V, 60 Hz

Amperage: less than 2 amps

NOTE: The Rinnai PC board will be damaged if

amperage exceeds 2 Amps.

In-rush current: Less than 2.5 Amps.

Check valve: An integral ow check (IFC) valve is

required. See plumbing diagram.

Pump Size

The pump should be sized for 2.5 GPM at the pressure

loss through the tankless water heater and the supply

and return plumbing in the recirculaon loop.

For more informaon on sizing the pump refer to the

Rinnai Circ Logic Guide or the secon Pump Sizing - ™ “

for Circulaon in the Rinnai Hot Water System ”

Design Manual.

Installaon

1. Turn o the electrical power supply by unplugging

the power cord or by turning o the electricity at

the circuit breaker.

2. Install the recirculaon pump on the return line

according to the pump manufacturer installaon

instrucons. Install a check valve in the return

line as shown in the Plumbing Diagram if one is

not integrated into the pump.

3. The wire harness for the recirculaon pump is

bundled with the wire harness from the PC board.

The connector has a black and white wire with the

label Cut wire to connect to pump To connect “ ”.

to the pump, cut the connector, splice the wires,

and add 4 Amp fuse to the hot wire (black) of the

pump. Connect the ground wire from the pump

to a screw at the base of the water cabinet .

Refer to the Pump Electrical Connecon Diagram.

Follow Electrical Code and pump manufacturers

recommendaons.

4. Adjust the dip switch by moving the 4th switch in

the whie set of switches (SW2) to ON.

For Economy mode, set the 8th switch in the

white set of switches (SW2) to OFF (default).

For Comfort mode, set the 8th switch in the white

set of switches (SW2) to ON.

5. Connect power to the water heater. Press the

Power buon on the controller. The pump and

water heater will turn on to raise the recirculaon

loop temperature.

Sengs for SW2

(bank of white switches)

Switch 4 Switch 8

Economy Mode ON OFF

Comfort Mode ON ON

Plumbing Diagram

NOTE: DO NOT install the Rinnai Scale Control system

within the recirculaon loop.

PUMP

Cut connector

and splice wires.

Pump Electrical Connecon

4 Amp

Fuse BL

Board

SCALE CONTROL

(RECOMMENDED)

30 VC Series Manual

Recirculaon Mode

Sequence of Operaon

DIP switches (SW2 white switches, #4, #8) should be -

set correctly for recirculaon and mode. The Rinnai

water heater should be turned on.

Pump recirculaon begins when the water heater is

turned on. The Rinnai inlet and outlet thermistors

measure the water temperature.

The water heater produces hot water at the

temperature seng. If the inlet thermistor detects

abnormal temperature then diagnosc code 51 is

generated and the pump will turn o.

When the return water temperature reaches

approximately 15°F (8.3°C) below the temperature

seng, the water heater and pump will turn o.

The cycle will restart at the approximate me interval

in the table based on the temperature thermistor

readings.

Economy Mode

The Economy mode operates as follows:

• Less energy consumed due to fewer pump cycles

• Assumes plumbing is insulated (minimal pipe heat

loss)

• Pump cycles on every 31 to 79 minutes (see

table).

Comfort Mode

The Comfort mode operates as follows:

• Higher energy consumpon due to more pump

cycles

• Assumes plumbing is not insulated resulng in

higher pipe heat loss

• Pump cycles on every 15 to 39 minutes (see

table).

Rinnai

Temperature

Seng

°F

Typical Pump ON Intervals*

Economy

Mode

Comfort

Mode

140 31 15

135 31 15

130 31 15

125 31 15

120 31 15

115 35 18

110 42 21

108 45 22

106 49 24

104 54 27

102 60 30

100 68 34

98 79 39

* The pump will cycle on at these calculated

intervals which are based on the temperature

seng, insulaon, and esmated heat loss in the

system. The values for your installaon may vary.

The oponal MC195T US controller provides a mer -

funcon to control the on/o periods of the recircula-

on pump.

VC Series Manual 31

Direct Vent Tankless Water Heater Operaon Instrucons

Important Facts about your Water Heater

Thank you for purchasing a Rinnai Tankless Water Heater. For proper operaon and safety, it is

important to follow the instrucons and adhere to the safety precauons.

Read all of the instrucons and the warranty thoroughly before operang this water heater. Keep this

manual in a safe place.

NOTICE: Rinnai somemes shares customer contact informaon with businesses that we believe provide

products or services that may be useful to you. By providing this informaon, you agree that we can

share your contact informaon for this purpose. If you prefer not to have your informaon shared with

these businesses, please contact customer service and ask not to have your informaon shared. We

will however, connue to contact you with informaon relevant to the product(s) you registered and/or

you account with us.

— Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any

other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor s phone. Follow the gas supplier’ ’s

instrucons.

• If you cannot reach your gas supplier, call the re department.

— Installaon and service must be performed by a licensed professional.

If the informaon in these instrucons is not followed exactly, a re or

explosion may result causing property damage, personal injury, or death.

WARNING

FOR OUTDOOR APPLICATIONS ONLY

RL75e .................... REU VC2528WD- -US

-REU VC2528FFUD US(A)-

RL94e .................... REU VC2837WD- -US

FOR INDOOR APPLICATIONS ONLY

RL75i ..................... REU VC2528FFUD- -US

-REU VC2528FFUD US(A)-

RLX94i ................... REU VC2737FFUD- -US

RL94i ..................... REU VC2837FFUD- -US

32 VC Series Manual

Consumer Operaon Guidelines for the Safe Operaon of your Water Heater

FOR YOUR SAFETY READ BEFORE OPERATING

A. This appliance does not have a pilot. It is

equipped with an ignion device which

automacally lights the burner. Do not try to light

the burner by hand.

B. BEFORE OPERATING smell all around the appliance

area for gas. Be sure to smell next to the oor

because some gas is heavier than air and will

sele on the oor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any

phone in your building.

• Immediately call your gas supplier from a

neighbor s phone. Follow the gas supplier’ ’s

instrucons.

• If you cannot reach your gas supplier, call the re

department.

C. Use only your hand to push in or turn the gas

control knob. Never use tools. If the knob will not

push in or turn by hand, do not try to repair it, call

a qualied licensed professional. Force or

aempted repair may result in a re or explosion.

D. Do not use this appliance if any part has been

under water. Immediately call a qualied licensed

professional to inspect the appliance and to

replace any part of the control system and any gas

control which has been under water.

TO TURN OFF GAS TO APPLIANCE

1. Turn o all electric power to the appliance using

the ON/OFF buon.

2. Set the thermostat to lowest seng.

3. Locate the manual gas valve on the side of the

heater. Turn the manual valve clockwise to the

full OFF posion.

OPERATING INSTRUCTIONS

1. STOP! Read the safety informaon above.

2. Set the thermostat to lowest seng.

3. Turn o all electric power to the appliance using

the ON/OFF buon.

4. This appliance is equipped with an ignion device

which automacally lights the burner. Do not try

to light the burner by hand.

5. Locate the manual gas valve on the side of the

heater. Turn the manual valve clockwise to the

full OFF posion.

6. Wait ve (5) minutes to clear out any gas. Then

smell for gas, including near the oor. If you smell

gas, STOP! Follow B in the safety informaon “ ”

above. If you don t smell gas, go to the next step.’

7. Turn the manual gas valve counterclockwise to the

full ON posion.

8. Turn on all electric power to the appliance using

the ON/OFF buon.

9. Set the thermostat to desired seng.

10. Open a hot water tap. If the appliance will not

operate, follow the instrucons To Turn O Gas “

To Appliance and call your licensed professional ”

or gas supplier. See manual for addional

informaon.

Manual Valve

OPEN

WARNING

If you do not follow these instrucons exactly, a re or explosion

may result causing property damage, personal injury, or loss of life.

VC Series Manual 33

How to use the Temperature Controller

The MC-91-2 controller is the standard temperature

controller that is supplied with the water heater. On

indoor models it is integrated into the front panel. The

MCC-91-2 controller is for hydronic applicaons requiring

higher temperatures. When the MCC-91-2 controller is

connected, these higher temperatures are available on all

controller models in the system. Refer to the secon on

temperature ranges.

DO NOT repeatedly operate the water heater and then use

a hot water tap while the controller is turned o. Operang

the water heater in this way to alternately produce hot

water may cause water to condense on the outside of

internal parts and accumulate in the water heater cabinet. Dimensions (inches): 3.5 W x 4.75 H x 0.75 D

Temperature

Display

Pr riio ty

Indi orcat

Pr rityio

Button

ON F/OF

Button

In Use

Indi orcat

Temperature

Selection

MC-91-2US

• Before operang, smell all around the appliance area

for gas. Be sure to smell next to the oor because

some gas is heavier than air and will sele on the

oor.

• Keep the area around the appliance clear and free

from combusble materials, gasoline, and other

ammable vapors and liquids.

• Always check the water temperature before entering

a shower or bath.

• Do not use this appliance if any part has been under

water. Immediately call a licensed professional to

inspect the appliance and to replace any part of the

control system and any gas control which has been

under water.

• Should overheang occur or the gas supply fail to shut

o, turn o the manual gas control valve to the

appliance.

• Do not adjust the DIP switch unless specically

instructed to do so.

• Do not use an extension cord or an adapter plug with

this appliance.

• Any alteraon to the appliance or its controls can be

dangerous and will void the warranty.

• If you install this water heater in an area that is known

to have hard water or that causes scale build-up the

water must be treated and/or the heat exchanger

ushed regularly. Rinnai provides a Scale Control “

System that oers superior lime scale prevenon and ”

corrosion control by feeding a blend of control

compounds into the water supply. Damage and repair

due to corrosive compounds in the air is not covered

by warranty.

• Keep the air intake locaon free of chemicals such as

chlorine or bleach that produce fumes. These fumes

can damage components and reduce the life of your

appliance. Damage and repair due to scale in the heat

exchanger is not covered by warranty.

WARNING

34 VC Series Manual

How to Set the Temperature

While any hot water is being provided,

the temperature seng can only be

adjusted between 98° F and 110° F.

NOTICE

Check local codes for the maximum water

temperature seng allowed when used

in nursing homes, schools, day care

centers, and all other public applicaons.

NOTICE

If a newly installed unit with a controller

has not been powered for at least 6 hours

then the temperature will return to the

default seng of 104° F (40° C) if power is

interrupted.

NOTICE

There may be a variaon between the

temperature displayed on the

temperature controller and the

temperature at the tap due to weather

condions or the length of pipe to the

water heater.

NOTICE

1. If the water heater is o, press

the Power buon to turn on.

2. If the Priority light is o, then

press the Priority buon on the “ ”

temperature controller. The

green Priority light will glow

indicang that this controller is

controlling the temperature and

that the water heater is ready to

supply hot water. (The priority

can only be changed while no hot

water is running.)

3. Press the up or down buons to

obtain the desired temperature

seng.

All hot water sources are able to

provide water at this temperature

seng unl it is changed again at

this or another temperature

controller.

DANGER

Water temperatures over 125° F (52° C) can cause severe burns or scalding

resulng in death.

Hot water can cause rst degree burns with exposure for as lile as:

3 seconds at 140° F (60° C)

20 seconds at 130° F (54° C)

8 minutes at 120° F (49° C)

Children, disabled, or elderly are at highest risk of being scalded.

Feel water before bathing or showering.

This water heater requires a minimum ow rate to operate. This rate can be found on the specicaon page in

this manual. In some cases when you are not geng hot water or if the water alternates between hot and cold,

it is due to the water ow being below or close to the minimum ow rate. Increasing the ow rate should

resolve these problems in these cases.

If you are experiencing issues with higher temperature sengs, then reduce the temperature seng. Selecng a

temperature closer to that which is actually used at the faucet will increase the amount of hot water being

delivered to the faucet, due to less cold water mixing at the xture.

VC Series Manual 35

Temperatures Available with a Controller

The water heater can deliver water at only one temperature seng at a me. The available temperatures are

provided below. A temperature lower than 98° F (37° C) can be obtained at the tap by mixing with cold water.

To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the On/O buon “ ”

for 5 seconds while the water heater is OFF.

These temperatures are suggesons only:

* Temperature sengs from 125 140 °F (52 60 °C) are available by seng switch 6 to ON in the SW1 Dip - -

switch (tan switches). These models have a default maximum temperature of 120° F (49° C) and an opon

(switch 6) to increase the maximum temperature to 140 °F (60 °C).

DO NOT adjust the other switches unless specically instructed to do so.

WARNING

• Kitchen 120 °F (49° C)

• Shower 98 - 110 °F (37 - 43 °C)

• Bath Fill 102 110 °F (39 - - 43 °C)

Temperature Sengs Available (Fahrenheit °F)

RL75i, RL75e

98 100 102 104 106 108 110 115 120 125

130

135

140

150

160

RL94i, RLX94i,

RL94e 185**

Celsius °C 37 38 39 40 41 42 43 46 49 52 54 57 60 66 71 85

** These sengs require the MCC-91-2 controller. When the MCC 2 controller is connected, these higher -91-

temperatures are available on all controller models in the system. Use of an MCC 2 controller in a -91-

residenal dwelling will reduce the warranty coverage to that of a commercial warranty applicaon.

Alternate Temperature Sengs

A dierent range of temperature sengs is available by seng switches 2 and 3 of the SW2 dip switch (white

switches) to ON. The table below shows the sengs available with the MC 2 and MCC 2 controller.-91- -91-

Alternate Temperature Sengs Available (Fahrenheit °F)

RL75i, RL75e

110 115 120 125 130 135 140 145 150 155 160

RL94i, RLX94i, RL94e 165 170 175 180 185

Celsius °C 43 46 49 52 54 57 60 63 66 68 71 74 77 79 82 85

MC-91- 2

MCC 2-91-

MC‐91‐1, ‐91‐1, ‐100 ‐1, ‐100 ‐1 MCC MC V and BC V controllers are not compable with

Alternate Temperature Sengs. Alternate Temperature Sengs are for commercial

applicaons only.

DO NOT use the MC MCC‐91‐1, ‐91‐1, ‐100 ‐1, MC V or BC V controllers when dip ‐100 ‐1

switches 2 and 3 (white switches) are in the ON posion.

WARNING

36 VC Series Manual

Temperature Opons Without a Temperature Controller

The default temperature seng for this appliance installed without a temperature controller is 120° F (49° C). If

desired, the temperature seng can be changed to 140° F (60° C) by adjustment of a switch.

In the SW1 Dip switch (tan switches), set switch 5 to ON to obtain 140° F water temperature seng. Set switch

5 to OFF (default) to obtain 120° F water temperature seng. If a temperature controller is installed, then

switch 5 has no eect on temperature sengs.

Seng Controller to Mute

On the MC-91-2 to eliminate the beeps when keys are pressed or to turn the beeps back on, press and hold both

the up and down buons unl a beep is heard (approximately 5 seconds).

Locking the Controller

The MC 2 controller can be locked by pressing the Priority buon and the up buon together for 5 seconds. -91-

A beep will sound conrming that the controller is locked. The display will alternately show LOC the “ ”,

temperature seng, and a diagnosc code if one has been acvated. All of the controllers in the system are

also locked.

To unlock the controller press the Priority buon and the up buon together for 5 seconds.

To Display Diagnosc Informaon

To display the most recent diagnosc informaon codes press and hold the On/O buon for 2 seconds on “ ”

the MC 2 controller. While holding the On/O buon press the up buon. The last 9 diagnosc codes will -91-“ ”

ash one aer the other. To exit this mode press the “On/O and up buon as before.”

To enter or exit the maintenance monitor informaon mode press and hold the down buon for 2 seconds and

without releasing it press the ON/OFF buon.

To obtain the water ow rate press the up or down buons unl displays. The water ow rate will then “01”

appear. For example means 5.8 gal/min. “58”

To obtain the outgoing water temperature press the up or down buons unl displays. The temperature “02”

will appear in degrees Fahrenheit.

Diagnosc Codes

This water heater is designed to display diagnosc codes. If there is a potenal operaon concern refer to the

code and remedy on the next page.

Data Unit No.

Water ow rate 0.1 gal/min 01

Outgoing water temperature Degrees Fahrenheit 02

VC Series Manual 37

Diagnosc Codes and Remedies

Code Denion Remedy

03 Power interrupon during Bath

Fill (Water will not ow when

power returns).

Turn o all hot water taps. Press ON/OFF twice.

10 Air Supply or Exhaust Blockage

Check that nothing is blocking the ue inlet or exhaust.

Check all vent components for proper connecons.

licensed

professional

only

Ensure approved venng materials are being used.

Ensure vent length is within limits.

Verify dip switches are set properly.

Check fan for blockage.

11 No Ignion

(heater not turning on)

Check that the gas is turned on at the water heater, gas meter, or cylinder.

If the system is propane, make sure that gas is in the tank.

Ensure appliance is properly grounded.

licensed

professional

only

Ensure gas type and pressure is correct.

Ensure gas line, meter, and/or regulator is sized properly.

Bleed all air from gas lines.

Verify dip switches are set properly.

Ensure igniter is operaonal.

Check igniter wiring harness for damage.

Check gas solenoid valves for open or short circuits.

Remove burner cover and ensure all burners are properly seated.

Remove burner plate and inspect burner surface for condensaon or debris.

Check the ground wire for the PC board.

12 No Flame

Check that the gas is turned on at the water heater, gas meter, or cylinder.

Check for obstrucons in the ue outlet.

If the system is propane, make sure that gas is in the tank.

licensed

professional

only

Ensure gas line, meter, and/or regulator is sized properly.

Ensure gas type and pressure is correct.

Bleed all air from gas lines.

Ensure proper venng material was installed.

Ensure condensaon collar was installed properly.

Ensure vent length is within limits.

Verify dip switches are set properly.

Check power supply for loose connecons.

Check power supply for proper voltage and voltage drops.

Ensure ame rod wire is connected.

Check ame rod for carbon build-up.

Disconnect and reconnect all wiring harnesses on unit and PC board.

Check for DC shorts at components.

Check gas solenoid valves for open or short circuits.

Remove burner plate and inspect burner surface for condensaon or debris.

14 Thermal Fuse has acvated Check for restricons in air ow around unit and vent terminal.

licensed

professional

only

Ensure dip switch 5 in the second bank of dip switches (white) is in the o posion.

Check gas type of unit and ensure it matches gas type being used.

Check for low water ow in a circulang system causing short cycling.-

Ensure dip switches are set to the proper posion.

Check for foreign materials in combuson chamber and/or exhaust piping.

Check heat exchanger for cracks and/or separaons.

Check heat exchanger surface for hot spots which indicate blockage due to scale

build up. Refer to instrucons in manual for ushing heat exchanger. Hard water -

must be treated to prevent scale build up or damage to the heat exchanger.

Measure resistance of safety circuit.

Ensure high re and low re manifold pressure is correct.

Check for improper conversion of product.

16 Over Temperature Warning

(safety shutdown because unit is

too hot)

Check for restricons in air ow around unit and vent terminal.

licensed

professional

only

Check for low water ow in a circulang system causing short cycling.-

Check for foreign materials in combuson chamber and/or exhaust piping.

Check for blockage in the heat exchanger.

Some of the checks below should be done by a licensed professional. Consumers

should never aempt any acon that they are not qualied to perform.

WARNING

38 VC Series Manual

Code Denion Remedy

19 Electrical Grounding

licensed

professional

only

Check all components for electrical short.

32 Outgoing Water

Temperature Sensor

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build-up.

Replace sensor.

33 Heat Exchanger Outgoing

Temperature Sensor

34 Combuson Air

Temperature Sensor

Check for restricons in air ow around unit and vent terminal.

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build-up.

Ensure fan blade is ght on motor sha and is in good condion.

Replace sensor.

Outside temperature

thermistor (outdoor

models only)

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build-up.

Replace sensor.

51 Inlet water temperature

thermistor

52 Modulang Solenoid Valve

Signal

Check modulang gas solenoid valve wiring harness for loose or damaged terminals.

Measure resistance of valve coil.

61 Combuson Fan

Ensure fan will turn freely.

Check wiring harness to motor for damaged and/or loose connecons.

Measure resistance of motor winding.

65 Water Flow Control

The water ow control valve has failed to close during the bath ll funcon. Immediately turn

o the water and disconnue the bath ll funcon. Contact a licensed professional to service

the appliance.

70 PC Board

Check PC board DIP switches for correct posion.

Check the connecon harness at the connecon on the PC board.

Replace PC board.

71 Solenoid Valve Circuit Replace the PC Board.

72 Flame Sensing Device Replace PC Board

79 Water Leak Detected Water has been detected at the boom of the unit. Turn o water supply. Check all plumbing

internally for leakage.

LC #

(LC0,

LC1,

LC2,…)

Scale Build up in Heat -

Exchanger (when checking

maintenance code history,

“00” is substuted for

“ ”) LC

LC0~LC9 indicates that there is scale build up in the heat exchanger and that the heat

exchanger needs to be ushed to prevent damage. Refer to the ushing instrucons in the

manual. Hard water must be treated to prevent scale build up or damage to the heat

exchanger.

To operate the water heater temporarily unl the heat exchanger can be ushed, push the On/

O buon on the temperature controller 5 mes. Repeated LC codes will eventually lockout

the water heater.

Please call Rinnai technical department.

FF Maintenance has been

performed Indicates a licensed professional performed maintenance or corrected an issue.

code

Nothing happens when

water ow is acvated.

Clean inlet water supply lter.

On new installaons ensure hot and cold water lines are not reversed.

Verify you have at least the minimum ow rate required to re unit.

licensed

professional

only

Check for cold to hot cross over. Isolate circulang system if present. Turn o cold water to the

unit, open pressure relief valve; if water connues to ow, there is bleed over in your plumbing.

Verify turbine spins freely.

Measure the resistance of the water ow control sensor.

If the display is blank and clicking is coming from the unit, disconnect the water ow servo

motor (GY, BR, O, W, P, BL, R). If the display comes on then replace the water ow servo

motor.

VC Series Manual 39

The appliance must be inspected annually by a

licensed professional. Repairs and maintenance

should be performed by a licensed professional. The

licensed professional must verify proper operaon

aer servicing.

Cleaning

It is imperave that control compartments, burners,

and circulang air passageways of the appliance be

kept clean.

Clean as follows:

1. Turn o and disconnect electrical power. Allow to

cool.

2. Close the water shut o valves. Remove and clean

the water inlet lter.

3. Remove the front panel by removing 4 screws.

4. Use pressurized air to remove dust from the main

burner, heat exchanger, and fan blades. Do not

use a wet cloth or spray cleaners on the burner.

Do not use volale substances such as benzene

and thinners. They may ignite or fade the paint.

5. Use so dry cloth to wipe cabinet.

Vent System

The vent system and condensate collector (located at

top of unit) should be inspected at least annually for

blockages or damage. If the vent and/or condensate

collector is blocked contact a licensed professional.

Motors

Motors are permanently lubricated and do not need

periodic lubricaon. However you must keep fan and

motor free of dust and dirt by cleaning annually.

Temperature Controller

Use a so damp cloth to clean the temperature

controller. Do not use solvents.

Lime / Scale Build up -

If you receive diagnosc code LC# (LC1, LC2,“ ” …),

refer to the procedure, Flushing the Heat Exchanger.

Refer to the secon on Water Quality to see if your

water needs to be treated or condioned. (When

checking maintenance code history, is “00”

substuted for LC#“ ”.)

The water must be potable, free of corrosive

chemicals, sand, dirt, or other contaminates. It is up

to the installer to ensure the water does not contain

corrosive chemicals, or elements that can aect or

damage the heat exchanger. Water that contains

chemicals exceeding the levels below aect and

damage the heat exchanger. Replacement of the

heat exchanger due to water quality damage is not

covered by the warranty.

Snow Accumulaon

Keep the area around ue terminal free of snow and

ice. The appliance will not funcon properly if the

intake air or exhaust is impeded (blocked or parally

blocked) by obstrucons.

Coastal Installaons

Installaons located in or near coastal areas may

require addional maintenance due to corrosive

airborne ocean salt.

Clean the water lter

Clean the inlet water lter by closing the cold and hot

water inlet isolaon (shut o) valves. Put a bucket -

under the lter at the boom of the water heater to

Required Maintenance

To protect yourself from harm, before performing maintenance:

• Turn o the electrical power supply by unplugging the power cord or by turning o the electricity at the

circuit breaker. (The temperature controller does not control the electrical power.)

• Turn o the gas at the manual gas valve, usually located immediately below the water heater.

• Turn o the incoming water supply. This can be done at the isolaon valve immediately below the water

heater or by turning o the water supply to the building.

WARNING

Keep the appliance area clear and free from combusble materials, gasoline, and other

ammable vapors and liquids.

WARNING

The appliance and vent system must be inspected annually by a licensed professional. Repairs and maintenance

should be performed by a licensed professional. The licensed professional must verify proper operaon aer servicing.

The following maintenance items are required for the proper operaon of your water heater.

40 VC Series Manual

catch any water that is contained inside the unit.

Unscrew the water lter. Rinse the lter to remove

any debris. Install the lter and open the isolaon

valves.

Pressure Relief Valve:

Operate the valve manually once a year. In doing so,

it will be necessary to take precauons with regard to

the discharge of potenally scalding hot water under

pressure. Ensure discharge water has a safe place to

ow. Contact with your body or other property may

cause damage or harm.

Visual Inspecon of Flame

Verify proper operaon aer servicing. The burner

must ame evenly over the enre surface when

operang correctly. The ame must burn with a clear,

blue, stable ame. See the parts breakdown of the

burner for the locaon of the view ports. The ame

paern should be as shown in the gures below.

Freeze Protecon

Make sure in case of freezing weather that the water

heater and its water lines are adequately protected to

prevent freezing. Damage due to freezing is not

covered by the warranty. Refer to the secon on

Freeze Protecon. The unit may be drained manually.

However, it is highly recommended that:

• drain down solenoid valves be purchased and

installed that will automacally drain the unit if

power is lost. These are available in a kit,

104000059. (The condensate trap is not aected

by the auto drain down solenoid valves and will

have to be manually drained.)

• a surge protector with terminals be purchased

and installed which allows the solenoid valves to

operate if the unit is disabled due to a diagnosc

code. This is available as 104000057.

Winterizing

These recommendaons are intended to suggest

pracces that are eecve for winterizing the water

heater. They should be used as a guide only. No

liability is assumed for any issues resulng from the

use of this informaon.

GAS

Shut o the gas to the water heater. It is generally

preferable to shut o the gas service to the enre

locaon if gas is not going to be used.

WATER

Shut o the cold water supply to the water heater. It

is generally preferable to shut o the water to the

enre locaon if water is not going to be used.

Drain the water heater by opening the drain valves on

the cold water line and hot water line.

Open several hot water taps and remove the lter

assembly at the water inlet in order to allow room for

expansion in case there is water in the lines that

freeze. Compressed air may be used to purge any

water le in the system.

ELECTRIC

Disconnect the power supply by either unplugging the

electrical cord or by turning o the circuit breaker to

the water heater to prevent potenal damage from

irregular power surges or interrupons.

VENT TERMINATION

Place a cover over the vent terminaon (intake and

exhaust) if it can be safely accessed. The cover should

be easy to apply and remove. This will prevent

debris, leaves, and small animals from entering the

venng and water heater which could cause air ow

issues upon return to service.

Tesng the pressure relief valve should only be

performed by a licensed professional. Water

discharged from the pressure relief valve could cause

severe burns instantly or death from scalds.

WARNING

Produkt Specifikationer

Mærke:	Rinnai
Kategori:	Kedler & kedler
Model:	RL75eP

Har du brug for hjælp?

Hvis du har brug for hjælp til Rinnai RL75eP stil et spørgsmål nedenfor, og andre brugere vil svare dig

Dit navn*

Din email*

Skriv dit spørgsmål her

Kedler & kedler Rinnai Manualer

Rinnai FM10NA Manual

25 December 2024

Rinnai ECF19i60 Manual

24 December 2024

Rinnai RX160iN Manual

1 September 2024

Rinnai RX130iN Manual

1 September 2024

Rinnai RX180iN Manual

1 September 2024

Rinnai Infinity 32 Manual

1 September 2024

Rinnai Infinity 12 Manual

1 September 2024

Rinnai RE199eP Manual

21 August 2024

Rinnai RU160iP Manual

21 August 2024

Rinnai TRW02IN Manual

21 August 2024

Kedler & kedler Manualer

Nyeste Kedler & kedler Manualer

Daikin EKHWSP180D3V3 Manual

9 April 2025

Daikin SDGTB1209 Manual

9 April 2025

Daikin SDGTB06 Manual

9 April 2025

Bosch Greentherm T9800 SE 199 Manual

21 Februar 2025

Longvie TE80F Manual

20 Februar 2025

Longvie CAE60 Manual

20 Februar 2025

Longvie T3110F Manual

20 Februar 2025

Longvie TE60F Manual

20 Februar 2025

Longvie T3050CF Manual

20 Februar 2025

Longvie T3075CF Manual

20 Februar 2025