Question about Heating & Cooling
I want to replace a Drayton thermostat with a Honeywell CM707 thermostat. It operates via a British Gas UP2 controller, I will leave the heating permanently on so that it is controlled by the thermostat. The CH system has a diverter valve which can supply heat to the water tank, the radiators or both. The wiring to the old thermostat was red, live, yellow, live for heat, and blue, neutral. The CM707 has A, live, B, live for heat, and neutral terminals, do I connect to the neutral terminal?
Posted by Anonymous on
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Posted on Aug 18, 2008
For Trane sytems, B is your "Common" wire. O is your reversing valve relay, G is your fan, Y is your compressor contactor, R is Hot, Brown will not be used on your electronic tstat. X2 is your backup electric heaters. Without knowing what terminals are on your new tstat, I cannot offer more information than this. The installation manual may indicate what each terminal is controlling. I strongly suggest to write down ALL of the terminals and colors from your old t-stat and be sure to turn off the power to your air handler. Put the fan switch on your tstat to ON before turning off the power. Make sure the fan is running. Then turn the power off to your Air Handler. If your fan stops running, you have turned the power off to your tstat and are ready to start replacing it with your new tstat. I hope you find this helpful. Good Luck!!!
Posted on Feb 07, 2010
Hello,You forgot to wire the O terminal w1 witch is the reversing valve.It is important to check if old stat is using O or B in witch case B terminal=w1 leaving O unused.
Posted on Apr 21, 2010
Tips for a great answer:
Jan 08, 2011 | Heating & Cooling
Dec 08, 2010 | Honeywell Electronic Programmable...
Jun 26, 2010 | Honeywell Programmable Thermostat Heater
Apr 02, 2010 | Honeywell Electronic Programmable...
Feb 09, 2010 | Honeywell CT87B ROUND HEATING&COOLING...
Jan 22, 2010 | Honeywell Programmable Thermostat Heater
Oct 16, 2009 | Honeywell Electronic Programmable...
Apr 23, 2009 | Honeywell Programmable Thermostat Heater
Jan 13, 2008 | Honeywell Programmable Thermostat Heater
24 people viewed this question
Usually answered in minutes!