Honeywell 7 Day Programmable Thermostat CM707

Product Information

I want to replace the thermostat with a Nest Thermostat e which I bought, but I'm struggling with the wiring.

Some boilers like Bosch have not adopted OpenTherm, they have their own modulating thermostats, but these only work in one room, so unless open plan home not really very good control, it would seem the Hive system was designed to get around this problem when boiler manufacturers only allow on/off electrical control. Anyway, you can just terminate this in the wall box (if you can track it I'd also disconnect the other end and leave safe just for consistency). I can keep the temperature at a base level, then give it a couple of hours boost during the day, and it will be up to temperature when I get home when it throttles back again and the residual heat keeps the room warm.So, the 'live' switching wires that were in A and B (ie the switch, would connect to the Hive Single channel terminals (1) and (3) which are also an on/off switch, exactly the same as the CM707 is. The switch wires for the boiler are connected via screw terminals on the backplate- but remember to switch off the power to your boiler first in case the wires are live! The end goal is to remove the existing zoning for heating with the HoneyWell thermostats and the switch valves (i.

If you do use the PI function, leave it to self learn for a week or so before you change the temperatures and confuse it.

I have made no internal connections, simply attached the brown to the L terminal on the Hive faceplat and the black to the L terminal on the Hive faceplate.

They say it is a great product that allows them to set differing temperatures during the day and on different days.Are you saying that the Hive won't work as a replacement in this case without running new wiring to the Hive faceplate? Please note that this unit has 2 On/Off periods per day, compared to the 3 periods of the CM900 series Honeywell Thermostats. You'll find the biggest plumbing brands and latest must-have products including smart home thermostats right here at PlumbingSupermarket. Where it fails is when zone valves have been fitted, then either Wiser or EPH seem king, depending if boiler OpenTherm enabled or not.