Honeywell Thermostat CM61NG User Manual

honeywell  
What if something happens to my heating system? How can I check that the CM61NG is working?  
See the troubleshooting guide below. If you need assistance after this call your installer.  
RF Programmable Thermostat  
CM61NG Trouble-Shooting Guide  
Symptom  
Possible Cause  
Remedy  
Blank display  
No batteries  
Check that the batteries are in the battery compartment and that the  
paper tab has been pulled out  
Wrong battery orientation  
Exhausted batteries  
Check that the batteries have been installed in the correct orientation  
Replace batteries  
Display shows flashing ‘battery’  
symbol  
Improper battery compartment insertion Remove battery compartment and re-insert  
Batteries need replacing  
Change batteries as described previously  
The heating is not required at this  
moment  
The heat demand is sent to the relay box as a value between 0-100%.  
The relay box will adjust the boiler on time to meet this requirement.  
That is why the heating will be off sometimes even if the ‘flame’  
symbol is displayed. To check if RF system is communicating properly  
press the TEMPerature UP button to increase the set temperature a  
few degrees above the current temperature. The heating should come  
on after a few seconds  
Display shows ‘flame’ symbol but  
heating does not switch on  
What is an RF ProgrammableThermostat?  
A Honeywell Radio Frequency (RF) programmable thermostat is a  
thermostat that controls your heating system so that you can have  
comfortable temperatures when you are at home and energy savings  
when you are out. With RF communication there is no need to provide  
a wired connection between thermostat and boiler. The CM61NG  
can therefore be installed without disrupting your room decor. These  
instructions explain how to program and operate your CM61NG to  
get the most comfort at the least cost.  
Boiler switched off  
Display works but heating does not  
switch on (HC60NG LEDs are off or  
green one is on)  
Switch the boiler on  
Wrong electrical connection  
Call electrical installer to check the boiler and relay box power supply  
as well as the connection between the boiler and the relay box  
RF communication lost due to the  
wrong location of the room unit  
HC60NG red LED is constantly on or  
flashing  
Hook the room unit back on the wall bracket or replace the room unit  
on the table stand to the position where RF communication was  
reliable.  
What will the CM61NG ProgrammableThermo-  
stat do for me?  
RF communication fault  
Call installer  
Wireless connection to the boiler allows you to mount the  
CM61NG in your room without disrupting the decor  
NOTE: You can control the boiler manually when the RF communica-  
tion is lost:  
Press the HC60NG push button to switch the boiler on and off. When  
the green LED is on – the boiler is on.  
Armchair programming lets you set up your CM61NG while  
resting comfortably in your armchair  
CM61NG not set correctly for your  
system  
Heating switches on or off too slowly  
or too quickly  
Call installer  
Call installer  
Optimum Start means that the CM61NG will switch on your  
heating system so that your desired comfort temperature is  
reached at the programmed time, thus avoiding unnecessary boiler  
firing  
CM61NG not set correctly for your  
system  
Temperature swings between too hot  
and too cold  
Attractive slim styling compatible with any room decor  
Fault in the CM61NG  
Display show ‘spanner’ symbol  
Remove the battery compartment and re-insert it. If the ‘spanner’  
symbol does not clear itself in a few minutes call the installer  
6 daily independent temperature levels let you set any 6  
temperatures from 5 to 30°C to match your daily lifestyle  
Holiday button saves energy by letting you reduce the tempera-  
ture for 1 to 99 days while you are on holiday, returning to normal  
operation on the day you return  
Memory holds the user program indefinitely so that it is never lost  
even if you take the batteries out  
What is Optimum Start?  
Warning.  
Instead of switching on the heating at the set time every day, the  
CM61NG will delay the start time to the latest possible moment, so  
that unnecessary heating is avoided. All you have to do is set the time  
when you want comfort temperature and the CM61NG will then  
decide when to turn the heating on, thereby ensuring your comfort.  
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 designs, unregistered designs, registered trade marks, unregistered trade marks and copyrights and also include the following UK registra-  
tion rights:  
UK patent application number 98062207.8  
UK registered design numbers 2073334, 2073340 and 2073343.  
honeywell  
Honeywell Control Systems Ltd.  
Arlington Business Park  
Bracknell, Berkshire RG12 1EB  
Tel: 01344 656000  
42010475-003 R1  
 

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