1 DAY PROGRAMMABLE THERMOSTAT CM901
■ Installation
The CM901 can either be surface or
flush switch box mounted. The wiring
sub-base has holes to suit single
switch boxes and provision for
surface wiring.
Do not position the CM901 or remote
temperature sensor near sources of
heat (direct sunlight, radiators, vents,
TV or lights), they must be located in
a position with good air circulation, at
average room temperature.
■ Ordering Specification
CMT901A1044
1 day programmable thermostat
complete with batteries, fixing screws
and instructions
F42010971-001
Wired Outside Sensor to enable
outdoor temperature display only
F42010972-001
Wired Room Sensor to enable remote
temperature control
■ Wiring
■ Specification
Switch Rating : 230V~, 50Hz, 0.5A to 8A resistive
: 24V~, 50Hz, 0.5A to 8A resistive
Switch Type : Single pole, double throw (SPDT) relay
Power Supply : Two AA size, LR6, 1.5V alkaline batteries
Battery Life : Minimum 2 years (Program retained
indefinitely in EEPROM)
Wiring : Potential free terminals < 2.5mm
2
Temperature Setting Range : 5 to 35˚C in 0.5˚C steps
Frost Protection Range : 5˚C (default) to 21˚C in 0.5˚C steps
Temperature Control Form : P+I (Proportional + Integral)
Temperature Sensing Element : 100K (@ 25˚C ) NTC thermistor
Temperature Control Accuracy : ± 0.5K at 20˚C (50% load, 3K/hour)
Time Setting Resolution : Time of day: 1 minute
: Programme time changes: 10 minutes
Time Display : 24 hr or 12 hr AM/PM format
Operating Temperature Range : 0 to 40˚C
Operating Humidity Range : 10 to 90% RH, non-condensing
Storage Conditions : –20 to 55˚C
European EN Approvals : EN60730-1 (Nov 2000), EN55014-1
(1997), EN55014-2 (2000)
■ Dimensions (mm)
© Honeywell Control Products and Systems, Issue 10, 4.3
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