Honeywell CM907 Programmable Thermostat PDF Product Specification Sheet Manual

The CM907 thermostat is designed to provide automatic time and temperature control of heating or cooling systems in villas and apartments.
It can be used as part of a system in conjunction with combiboilers, oil-burners and gas fired boilers, circulation pumps, thermal actuators, zone valves and electric heat systems (<8A). The CM907 is designed with the installer in mind and includes a moulded back-plate with trunking guides and wiring breakouts to make installation quick and easy. The CM907 extra large LCD display, dynamic text display, button layout based on the same simple programming philosophy used on our acclaimed CM60 products and the introduction of an ‘OK’ button, makes it easier to install and
more user friendly. The unit is ideal for consumers who want reliable precise temperature control from a modern looking, simple to program and easy to use product.

The thermostat will adjust the start time in the morning/afternoon so the desired temperature is reached by the start of the program period e.g. Time o 7:00, Temp 21 C. The thermostat will monitor the accuracy of the start up and use this information to modify the calculation for the following day by changing the ramp rate (initial 3 K/hr) .The system will restrict the start time to a max of 2 hours. Note: Optimisation will not work in cooling mode. Change display format (default 24hr). When enabled the Pump Exercise will switch the relay on for 1 minute at 12:00 if the relay has not been switched on since 12:00 the previous day. While in Holiday mode the Pump Exercise feature, if enabled, will operate.
The normal upper temperature limit of 35 C can be reduced down to 21 C to save the homeowner energy. Useful if the homeowner rents to tenants. The normal lower temperature limit of 5 C can be increased up to 21 C to protect the inhabitants from cold. Useful if the inhabitants include the elderly, children or disabled. If the thermostat is located in a hot/cold location and cannot be moved because of wiring then the measured/ displayed temperature can be adjusted by +/- 3 C. Useful if the homeowner wants the reading to match another appliance temperature display.

Can be adjusted up to 3 C (default is 1.5 C) to provide better temperature control (less overshoot). Useful for: a. Well insulated homes with over-sized heating systems. b. Air systems with fast response. An Outside Temperature Sensor can be fitted, allowing the homeowner to display the outside temperate on the thermostat display by pressing the INFO i button. The thermostat will read the outside temperature every 10 minutes. Outside temperature display range is from -30 C to +45 C. The sensor can be connected up to 50 meters from the unit. A Remote Temperature Sensor can be fitted, allowing the thermostat to control the temperature from another room or space, where it is inconvenient to locate the thermostat. It will read the remote sensor every 1 minute. The sensor can be connected up to 50 meters from the unit. Useful for commercial premises where the public may tamper with the product.

The CM907 thermostat is the control element of the heating / cooling system and, therefore, MUST be located in a position with good air circulation, at average room temperature and on an inside wall 1.5 metres, above the floor level. Do not position the CM907 thermostat near sources of heat (radiators, hot air vents, TV or lights), near doors or windows, or in direct sunlight. MOUNTING The CM907 thermostat can be mounted directly on the wall surface or on an electrical wallbox. WIRING The CM907 thermostat is designed for fixed wiring only and must be installed in accordance with the latest l.E.E. regulations. Ensure the wiring connection to the supply is via a fuse rated at no more than 8 amps and a Class “A” switch (having contact separation of at least 3 mm in all poles). IMPORTANT
1. The installer must be a trained service engineer
2. Disconnect the power supply before beginning installation

Download Honeywell CM907 Programmable Thermostat PDF Product Specification Sheet Manual


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July 8, 2010 | Posted in Honeywell Manual, Thermostats

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