[. . . ] ANALOGUE CHRONOTHERMS
PRODUCT SPECIFICATION SHEET
The CM31 and CM37 chronotherms are designed to provide automatic time and temperature control of heating systems in the home. [. . . ] Relevant standards EN60730-1 (1995), EN55014-1 (1997), EN55014-2 (1996).
Time switch
Environmental
Clock accuracy Programme
Protection class : IP30 Approvals
ORDERING SPECIFICATION
T6631B1005 - CM31 with 24 hour clock programme T6637B1009 - CM37 with 7 day clock programme
DIMENSIONS
EN0R 8502 R1
2
CM31 & CM37 CHRONOTHERMS
INSTALLATION
LOCATION
The CM31 or CM37 Chronotherm is the temperature control element in the heating system and MUST be located in a position with good air circulation at average room temperature on an inside wall 1. 5 metres above the floor level. Do not position the Chronotherm near sources of heat (radiators, hot air vents, TV or lights), near doors or windows, or in direct sunlight.
MOUNTING
CM31 and CM37 can be mounted directly on the wall surface or on an electrical wallbox. Mounting screws are supplied for both alternatives.
WIRING
CM31 and CM37 are designed for fixed wiring only and must be installed in accordance with latest l. E. E. Ensure the wiring connections to the supply are via a fuse rated at 8 amps (max) and a Class "A" switch (having contact separation of at least 3 mm in all poles).
IMPORTANT 1. Disconnect the power supply before beginning installation
WIRING
Direct burner control Combi boiler control Valve actuator control
CM31/ CM37
CM31/ CM37
CM31/ CM37
COMBI BOILER
3
EN0R 8502 R1
CM31 & CM37 CHRONOTHERMS
Zone valve control (i)
CM31/ CM37
Zone valve control (ii)
Zone valve control (iii)
CM31/ CM37
CM31/ CM37
Electric Heating Systems
Systems rated above 8 A resistive (1. 75 kW) should be controlled via a contactor. Systems rated below 8 A can be switched directly by the CM31 or CM37 relay. [. . . ] Philips V275LA2) is installed across the contactor coil to suppress interference from voltage spikes.
CM31/ CM37
Electric heating control
CM31/ CM37
1. 5kW HEATER
20 Amp contactor
4. 0 kW HEATER
Honeywell Control Systems Limited Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom
http://europe. hbc. honeywell. com
EN0R 8502 R1 [. . . ]