Honeywell CM67 Manual

Honeywell Termostat CM67

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Honeywell Control Systems Ltd.

Arlington Business Park

Bracknell, Berkshire RG12 1EB

User Help Line: 01344 656511

USER GUIDE

What is a Programmable Thermostat?

The Honeywell CM67 is a programmable thermostat which controls your

heating system so that you can have comfortable temperatures when you

are at home and energy savings when you are away.

It is important to understand that the CM67 is not a traditional “ON/OFF”

controller but a “HI / LOW” temperature controller.

This means that to program the heating to go ‘OFF’ at a particular time a

lower (setback) temperature setpoint is entered which you would choose

to protect you and your home.

What will the CM67 Programmable Thermostat

do for me?

Attractive slim styling makes it ideal for location in any suitable

room in your home

illuminates the display when a key is pressed or Display Backlight

the slider is moved for easier viewing in low light conditions

7 day program lets you set the CM67 to match your weekly

lifestyle

6 daily independent temperature levels any let you set 6

temperatures from 5 to 30°C at any time each day, to match your

daily lifestyle

Party button lets you temporarily maintain (or adjust) the current

temperature for 1 - 23 hours. Useful when you have friends round or

go out of the house for a short while

Day Off button copies Sunday’s program into tomorrow so that you

can make the CM67 follow the Sunday program if you have a day off

during the week

Holiday button saves energy by letting you reduce the temperature

for 1 to 99 days while you are on holiday, returning to normal operation

on the day you return

Automatic Summer/Winter Time Change will adjust the clock

automatically for 'Daylight Saving Time'

Memory holds the user program indenitely so that it is never lost

even if you take the batteries out

Outside Temperature Sensor (optional accessory) can be tted to

the CM67 to display the outside temperature

Remote Temperature Sensor (optional accessory) can be tted to

the CM67 to control the temperature from another room

Optimum Start option is a program which ensures that the optimum

temperature conditions are achieved at the required times as

described below (not available on T6667B1069)

What is Optimum Start?

Optimum Start is an Energy Efciency Feature that adjusts the start time

of your heating system depending upon how cold it is.

On cold days your Heating will be started earlier to ensure that your home

is warm when you get up and on warmer days the heating system will be

started later to save energy.

So, if the Optimum Start Feature is used, the time / temperature settings

which are entered into the CM67 are when you want to be warm by and

not when you want the heating to start. (not available on T6667B1069)

What if something happens to my heating system? How can I check that the CM67 is working?

See the troubleshooting guide below. If you need assistance after this, call your Heating Installer. The CM67 should only be opened or removed by a qualied

professional to prevent possible injury from electric shock.

Can I use CM67 to control my air-conditioning

system?

Yes. Please refer to your installer for more information.

What other accessories can I buy that work with

the CM67?

Honeywell provides other accessories and “Add-On” modules that can

be used with your CM67, ask your installer for details :

1. Automatic Time Setting (ATS) “Add-On” Module *

The ATS module picks up a daily time signal from a transmitter in Central

Europe and corrects the time on the CM67 display. So:

• You never need to set or adjust the time

• There is no need to adjust the unit by -/+ 1 hour in summer / winter

since the unit does this automatically

• Your CM67 is the most accurate clock in your home so you can use

this information to set-up all your other clocks.

* Not available in all Geographic Regions depending on transmitter range

and home location.

2. Outside Temperature Sensor Accessory

The Outside Temperature Sensor accessory can be tted to your CM67

to display the outside temperature. By pressing the

button twice, the

CM67 displays the external temperature.

3. Remote Temperature Sensor Accessory

The Remote Temperature Sensor accessory can be tted to your CM67

to control the temperature of another room where it is inconvenient to

locate the CM67 e.g. commercial premises where the public may adjust

buttons.

42010818-003 R1

Symptom

Blank Display

Display shows flashing symbol

Display works but heating does not

switch on

Heating switches ON/OFF too slowly

or too quickly

Temperature swings between too hot

and too cold

Display shows symbol

Display shows the word 'SERVICE'

Possible Cause

No batteries

Battery orientation

Exhausted batteries

Incorrect battery cartridge insertion

Batteries need replacing

No power to system

Program does not call for heat

CM67 not connected to boiler properly

CM67 not set correctly for your system

Fault in the CM67

Your installer has set a scheduled

maintenance alert period on your CM67 as

a recommendation that your heating system

should receive a routine inspection.

Remedy

Check batteries are in the battery compartment and that the

paper tab has been pulled out

Check that the batteries have been installed in the correct

orientation.

Replace batteries

Remove battery cartridge and re-insert

Change the batteries as described previously

Check that there is power to the system

Move the slider and press MAN TEMP

to increase the

temperature a few degrees above the current room temperature.

The heating should come on after a few seconds.

Call installer to check electrical connection between the CM67

and the boiler

Call installer

Remove battery cartridge and re-insert. If the symbol

does not clear itself in a few minutes call the installer

Call your installer to arrange a maintenance visit.

The CM67 and heating system will continue to operate as

normal.

Trouble Shooting Guide

CM67

Programmable

Thermostat

EXT

Warning.

This product and its associated documentation and packaging are protected by various intellectual property rights belonging to Honeywell Inc and its

subsidiaries and existing under the laws of the UK and other countries. These intellectual and property rights may include patent applications, registered