Honeywell Programmable Room Thermostat 24 hour CM921

Product Information

The CM921 thermostat is designed to provide automatic time and temperature control of heating or cooling systems. It can be used as part of a system in conjunction with combi boilers, oil-burners and gas fired boilers, circulation pumps, thermal actuators, zone values and electric heating systems The Intergas Combi Compact ECO RF 30 features a built-in RF module (some Honeywell RF thermostats can communicate with the boiler directly) and OpenTherm technology as standard.

CM921 or CM927 Honeywell Sending a Binding signal from the CM921 or CM927 Honeywell

Optimum Start & Stop saves energy and money by getting to the correct temperature at the correct time and turning off the heating early if the room temperature is correct.The Pro Series Wireless Programmable Thermostat is a BRAND NEW 2021 launched, 7 day programmable room thermostat designed to replace all existing Honeywell CM Series Wireless Thermostats. I have a Ferolli boiler not even 2 years old with the Honeywell wireless thermostat control unit built on to the thermostat circuit, The control unit/timer that is built into the boiler has been disabled so there is no chance that the boilers built in controller is conflicting with the honeywell wireless units. Direct replacement for a Honeywell CM927/CMS927/CM727/CM921, if you are unsure about compatibility please call us on 01302 279234. The Pro Series Wireless Programmable Thermostat works with the following Honeywell Wireless Relay Boxes:

Honeywell CM900 Wireless Installation Guide - Honeywell

If you take a good look at the Pro Series Wireless Programmable Thermostat, you will see it is nearly identical to Honeywell Home’s T3 Series Thermostat (the user display menu is identical). However, the big difference is that the Pro Series Wireless Programmable Thermostat will bind directly to any existing Honeywell Wireless Relay Boxes, where the T3 Series won’t, so you don’t have the hassle of having to get an installer out to fit this.If I set the wireless unit to 18 degrees and the room temp is 21 degrees then surely the heating should stay off when it's in manual mode?

CM921 - User Guide - Sparesbase CM921 - User Guide - Sparesbase

The Intergas Xtend works with any Intergas ErP boiler. So if you already have an Intergas combi or system boiler, you can benefit from having a hybrid! Built-in memory holds the user program indefinitely so that it is never lost – even if you remove the batteries This is a Pro Series Wireless Programmable Thermostat ONLY and does not include a Wireless Relay Box!The boiler has a mind of its own and the heating decides to come on and off when it feels like it especially at 2 - 3 am in the morning! The Honeywell CM921 Wireless 24Hr Programmable Room Thermostat can be used to control the heating circuit in a Sundial S or Y Plan and is particularly well suited to control combination boiler installations or additional zones in a S Plan Plus system. The Honeywell CM921 Wireless 24Hr Programmable Room Thermostat is for use where heating needs are the same from day to day. The CM927 can provide a different heating programme for each day of the week to maximise energy efficiency. Two wire, volt free connections are ideal for use with combination boilers. Honeywell CM921 Wireless 24Hr Programmable Room Thermostat Product Features:

Honeywell CM921 Wireless Thermostat Problems - PlumbersForums.net Honeywell CM921 Wireless Thermostat Problems - PlumbersForums.net

If you leave it below 1.5m above floor level it may be reading the wrong temperature and causing the boiler to fire up. eg: on a coffee table. Pro Series Wireless Programmable Thermostat – Replaces Honeywell CMS927 & CMS921 Wireless Programmable Room Thermostats bolier is a Baxi it was only available for a few years because of issues with a seal and something else which to be fair we had replaced once under warranty and it’s been fine since(tempting fate).Pro Series Wireless Programmable Thermostat | Direct Replacement for Honeywell CM927/CMS927/CMS927B1049 Wireless Programmable Room Thermostat The Intergas Xtreme 24 is now available to buy online @ The INTERGAS Shop! The Intergas Xtreme 24 is the latest and greatest combi boiler Intergas have produced to date. Day Off button copies Sunday’s program into any other day of the week, so that you can make the Pro Thermostat follow this program if you have a day or days off. Wireless connection to the boiler allows you to mount the Chronotherm in your room without disruption The Pro Series Wireless Programmable Thermostat is a direct replacement for Honeywell CM927, CMS927 & CMS927B1049 7 Day Wireless Programmable Room Thermostat and will bind directly to the Intergas ECO RF, Xclusive and Xtreme range of boilers (see video below).