Installation; Wiring; Specification; Dimensions - Honeywell CM901 Manual

1 DAY PROGRAMMABLE THERMOSTAT
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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.
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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
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Wiring

© Honeywell Control Products and Systems, Issue 10, 4.3
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Specification

Switch Rating
Switch Type
Power Supply
Battery Life
Wiring
Temperature Setting Range
Frost Protection Range
Temperature Control Form
Temperature Sensing Element : 100K (@ 25˚C ) NTC thermistor
Temperature Control Accuracy : ± 0.5K at 20˚C (50% load, 3K/hour)
Time Setting Resolution
Time Display
Operating Temperature Range : 0 to 40˚C
Operating Humidity Range
Storage Conditions
European EN Approvals
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Dimensions (mm)
: 230V~, 50Hz, 0.5A to 8A resistive
: 24V~, 50Hz, 0.5A to 8A resistive
: Single pole, double throw (SPDT) relay
: Two AA size, LR6, 1.5V alkaline batteries
: Minimum 2 years (Program retained
indefinitely in EEPROM)
: Potential free terminals < 2.5mm
: 5 to 35˚C in 0.5˚C steps
: 5˚C (default) to 21˚C in 0.5˚C steps
: P+I (Proportional + Integral)
: Time of day: 1 minute
: Programme time changes: 10 minutes
: 24 hr or 12 hr AM/PM format
: 10 to 90% RH, non-condensing
: –20 to 55˚C
: EN60730-1 (Nov 2000), EN55014-1
(1997), EN55014-2 (2000)
CM901
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