RF Chronotherm with extended feature set and slim ultra-modern design CM927, CM921
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| The CM920 (CM927 or CM921) is a modern wireless programmable room thermostat based on Honeywell's proven CM60RFNG programming philosophy. To further improve the ease of use and assist installation this product includes an extra large LCD display with backlighting, a dynamic text display and an 'OK' button. |
| Used for general purpose control of boiler, zone values, circulation pumps, thermal actuators, electric heaters, heat pumps, etc. in heating and cooling systems. |
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| Power source |
transmitter (room unit): battery powered, 2 x 1,5 V AA Alkaline cells supplied; receiver (relay box): mains powered 230 V, 50 Hz |
| Battery life |
2 years typical |
| Switch function/capacity |
SPDT, 24..230 Vac, 10 A resistive, 3 A inductive |
| Protection class |
IP30 (receiver and transmitter) |
| RF frequency range |
868 ... 868.6 MHz |
| Blocking immunity |
Receiver class 2 (ETSI EN300220-1 version 1.3.1) |
| Terminal max. wire size |
2.5 mm2 |
| Temp. setpoint range |
0 ... 35 oC |
| Control functions |
Fuzzy Logic Algorithm |
| Temperature setpoints per day |
6 |
| Time setting resolution |
time of day 1 minute, program 10 minute steps |
| Heating /Cooling application |
H or C |
| Manual operation functions |
manual setpoint setting (MAN) and frost protection (OFF) modes available |
| Holiday mode |
yes |
| Optimisation |
yes |
| Additional description |
| • |
LCD backlighting |
| • |
automatic summer/winter time change |
| • |
user program stored in non-volatile memory |
| • |
factory pre-set RF link between the room unit and the relay box |
| • |
installer set-up mode |
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| Default time display format | Party timer | Day off function | User panel language | Product literature language | Type |
|---|
| 24 h | • | • | English | NL, F | CMT927A1015  |
| 24 h | • | • | French | F | CMT927A1023 |
| 24 h | • | • | Spanish | E | CMT927A1031 |
| AM/PM | • | • | English | UK | CMT927A1049 |
| 24 h | • | • | Italian | I | CMT927A1056 |
| 24 h | • | • | English | D, HU, PO | CMT927A1064 |
| 24 h | • | • | English | CZ, SK, PL | CMT927A1072 |
| Default time display format | Party timer | Day off function | User panel language | Product literature language | Type |
|---|
| 24 h | — | — | English | NL, F | CMT921A1018 |
| 24 h | — | — | French | F | CMT921A1026 |
| AM/PM | — | — | English | UK | CMT921A1042 |
| Description | Additional Product Type |
|---|
| Relay box (1-off) with English and German literature | R6660D1009 |
| Relay box (1-off) with Dutch and French literature | R6660D1017 |
| Relay box (1-off) with French literature | R6660D1025 |
| Relay box (1-off) with Spanish literature | R6660D1033 |
| Relay box (1-off) with UK literature | R6660D1041 |
| Relay box (1-off) with Italian literature | R6660D1058 |
| Description | Additional Product Type |
|---|
| 7-day Room unit spare (Belgian version) | CMS927B1015 |
| 7-day Room unit spare (French version) | CMS927B1023 |
| 7-day Room unit spare (Spanish version) | CMS927B1031 |
| 7-day Room unit spare (UK/English version) | CMS927B1049 |
| 7-day Room unit spare (Italian version) | CMS927B1056 |
| 7-day Room unit spare (German/Hungarian version) | CMS927B1064 |
| 7-day Room unit spare (Cz, Sk, Pol version) | CMS927B1072 |
| 7-day Room unit spare (Belgian version) | CMS921B1018 |
| 7-day Room unit spare (French version) | CMS921B1026 |
| 7-day Room unit spare (UK version) | CMS921B1042 |
