Honeywell Programmable Room Thermostat 24 hour CM921

Product Information

CM921 can be installed without disrupting your room decor as no wiring connection is required between the room unit and the boiler 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). More Add Plumbing Business Post / Search Plumbing Jobs Add Plumbing Video Advertise on PlumbersForums.net

HONEYWELL CM921 PROG R/STAT 24HR RF | Wolseley

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. 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.PF Community Forums General Off-Topic Chat For Sale & Wanted Make a suggestion about the forum in general Hello, my Honeywell CM921 Thermostat does not display properly, I can hardly see anything on the LCD screen.

CM900 Wireless Installation Guide - Plumbworld

The Pro Series Wireless Programmable Thermostat works with the following Honeywell Wireless Relay Boxes: 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.Find a Plumber Plumbers Looking for Work - Post Here Looking for a Plumber? Post Jobs Here Looking for a Heating Engineer? Post Jobs Here Find a Renewable Energy Specialist Plumbers Directory Listings Not sure what you mean to be honest. The boiler is fixed, the thermostat is wireless and fires the relay to start stop the boiler when thermostat at temperature. That thermostat allows a several time periods throughout the day. Seen these have smart features app controlled , geo fencing and the like and can add individual radiator control later.

HONEYWELL CM921 USER MANUAL Pdf Download | ManualsLib

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 Pro Series Wireless Programmable Thermostat will replace the following Honeywell CM Series products: The Honeywell CM921 is wireless and can be controlled remotely using the Honeywell Total Connect Comfort app, available for iOS and Android devices. This allows users to adjust their heating schedules and monitor their heating systems from anywhere, at any time. The device also features a frost protection mode that helps to prevent pipes from freezing during cold weather. 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 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 - User Guide - Sparesbase CM921 - User Guide - Sparesbase

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.Direct replacement for a Honeywell CM927/CMS927/CM727/CM921, if you are unsure about compatibility please call us on 01302 279234. 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. I have a Ferolli boiler not even 2 years old with the Honeywell wireless thermostat control unit built on to the thermostat circuit, 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 Built-in memory holds the user program indefinitely so that it is never lost – even if you remove the batteries