Honeywell Programmable Room Thermostat 24 hour CM921

Product Information

Reliable RF communication utilising 868 MHz band with 1 percent duty cycle limit to minimise communication disturbance Pro Series Wireless Programmable Thermostat – Replaces Honeywell CMS927 & CMS921 Wireless Programmable Room Thermostats The Pro Series Programmable Wireless Thermostat replaces the discontinued Honeywell CM927/CMS927/CMS927B1049. This is a 7 day wireless programmable room thermostat designed to control your heating system efficiently, providing comfortable temperatures when you are at home and energy savings when you are away. With wireless communication there is no need to provide a wired connection between the thermostat and boiler. The Pro Series Wireless Programmable Thermostat works with the following Honeywell Wireless Relay Boxes:

CM921 - User Guide - Honeywell

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.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. CM921 can be installed without disrupting your room decor as no wiring connection is required between the room unit and the boiler I have a Ferolli boiler not even 2 years old with the Honeywell wireless thermostat control unit built on to the thermostat circuit,

Honeywell CMT921 Wireless 24Hr Programmable Room Thermostat

Seen these have smart features app controlled , geo fencing and the like and can add individual radiator control later. Pro Series Wireless Programmable Thermostat | Direct Replacement for Honeywell CM927/CMS927/CMS927B1049 Wireless Programmable Room Thermostat Pro Series Programmable Wireless Thermostat Box contains: bent the battery connector slightly and seems to be fairing much better, however I am expecting it to fail completely at some point. 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 This is a Pro Series Wireless Programmable Thermostat ONLY and does not include a Wireless Relay Box!Can be installed standalone* or part of an existing heating system*, including conventional and combi boilers, as well as new heating systems. Can I buy another same thermostat and bind it with my current receiver, or do I have to change both of them? The window sensor, isn’t a window sensor as such it’s looking at temperatures changing rapidly due to drafts and the video says it’s hit and miss on open windows so probably wouldn’t use that feature as such. Allows flow and return temperatures to be reduced thereby increasing the efficiency of the heating circuit

Honeywell cmt921 24 Hour Wireless Programmable Thermostat

The Honeywell CM921 can be programmed for up to six different time periods per day, allowing users to tailor their heating schedules to their individual needs and preferences. The device also features a holiday mode that allows users to set a lower temperature when they are away from home for an extended period of time, helping to save energy and reduce costs. Hello, my Honeywell CM921 Thermostat does not display properly, I can hardly see anything on the LCD screen. OFF mode has an integral frost protection setting at minimum 5°C (installer adjustable) so that pipes in the house will never freeze in winter

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). 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.

Honeywell / Pro CM927 CM921 CM727 CM721 (Mk2 Hanicks Honeywell / Pro CM927 CM921 CM727 CM721 (Mk2

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. 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 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.