Pro Series Wireless Programmable Thermostat – Replaces Honeywell CMS927 & CMS921 Wireless Programmable Room Thermostats More Add Plumbing Business Post / Search Plumbing Jobs Add Plumbing Video Advertise on PlumbersForums.net Built-in memory holds the user program indefinitely so that it is never lost – even if you remove the batteries

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

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. 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. 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! Can be installed standalone* or part of an existing heating system*, including conventional and combi boilers, as well as new heating systems. The Honeywell CM921 is a programmable thermostat designed for use in homes and small businesses in the United Kingdom. It features a clear digital display and simple controls, making it easy to set schedules for heating and cooling systems. The device is compatible with a wide range of boilers, making it versatile and suitable for different types of heating systems.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. The Honeywell CM921 Wireless 24Hr Programmable Room Thermostat series of Wireless Programmable Thermostats is designed to provide wireless time and temperature control to heating or cooling systems in domestic and light commercial buildings. The slim, ultra modern design complements the large LCD screen with the Line of Text (LoT) display and one function button to ensure simplified programming and operation for all users. 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?

HONEYWELL CM921 USER MANUAL Pdf Download | ManualsLib

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: The ‘Pro Series’ is made in the UK by Resideo (who were formally part of Honeywell International Inc.) and distributed to independent merchants via a national merchant wholesaler. Resideo (Honeywell Home) is the same manufacturer who made the CM700 & CM900 Series Thermostats. Seen these have smart features app controlled , geo fencing and the like and can add individual radiator control later. The Pro Series Wireless Programmable Thermostat can also replace a CM721, CM727, CM921 (CMS921B1042) or CM927 (CMS927B1049) room unit and will pair directly to an existing BDR91.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). It is possible to rebind a new thermostat to your existing reciever. The rebinding procedure will be in the manual.

Honeywell CM921 | DIYnot Forums Replacement for Honeywell CM921 | DIYnot Forums

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. CM921 can be installed without disrupting your room decor as no wiring connection is required between the room unit and the boiler 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 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 Wireless connection to the boiler allows you to mount the Chronotherm in your room without disruption

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Hello, my Honeywell CM921 Thermostat does not display properly, I can hardly see anything on the LCD screen. Would consider smart radiator Control, but can see that isn’t cheap and not sure how good it actually is. Pro Series Wireless Programmable Thermostat | Direct Replacement for Honeywell CM927/CMS927/CMS927B1049 Wireless Programmable Room Thermostat