The Honeywell CM900 (CM907 or CM901) is a modern programmable room
thermostat based on Honeywell’s proven programming philosophy. To further
improve the ease of use, this product includes a very large LCD display with
backlighting and a Dynamic Text Display to assist customers during daily use.
Installing the Thermostat
41
Notes:
Remember to always press the green
button to conrm that you want to store your new Installer Set-Up setting. To exit the Installer Mode move
the slider switch to the AUTO or MAN positions.
System Commissioning
To enter the diagnostic mode move the slider switch to the OFF position then press and hold the
button for 5 sec. The unit will enter the user
settings mode. Next press and hold the
and
buttons together. The unit will hold the relay on for 5 minutes and the following information can
be viewed on the display by pressing the
or
buttons. : model ID, date code (WW/YY) and checksum.
ParameterParameter No.
AM-PM / 24hr Display
Reset Time/ Temp Program
Auto Summer/Winter Time
Change
LCD Backlighting
Upper Temp Limit
Lower Temp Limit
Optimisation
Telephone Override
Second Sensor
Temperature Offset
Proportional Band Width
Reset Parameters to Factory
Defaults
Minimum boiler ON time
Cycle Rate
Electric Heat
Heat/Cool Change
Pump Exercise
1:CL
2:rP
3:tC
5:bL
6:uL
7:LL
8:OP
9:tS
10:SS
12:tO
13:Pb
19:FS
1:Ot
2:Cr
3:EH
4:HC
5:PE
Installer Parameters Table:
Category 1 Parameters
-
Programmable Thermostat Settings
Factory Default Setting
Display
12
1
1
1
35
5
0
0
0
0.0
1.5
1
Display
1
6
0
0
0
Description
12 hr – AM/PM clock display format
Time / Temperature prole set to factory
default.
Changes to 0 when one of the time/temp
proles are changed.
Auto Summer/Winter Time Change
Enabled
Backlighting Enabled
35°C Upper Temp. Limit
5°C Lower Temp. Limit
Optimisation Disabled
Telephone Override Disabled
Second Sensor Disabled
No temperature offset
Proportional band of 1.5 degree
All settings at factory defaults
Changes to 0 when one of the parameter
is changed
Description
1 minute minimum ON time
6 cycles per hour (cph)
Resistive Loads <3 A
Disabled
Pump exercise disabled
Optional Setting
Display
24
0
0
0
21 to 34
5 to 21
1
1
1 or 2
-3 to +3
1.6 to 3.0
0
Display
2 to 5
3, 9 or 12
1
1
1
Description
24 hr clock display format
Factory Time / Temperature prole has
been modied
To restore the factory prole set to 1
Auto Summer/Winter Time Change
Disabled
Backlighting Disabled
21°C to 34°C adjustment in 1°C steps
5°C to 21°C adjustment in 1°C steps
Optimisation Enabled
Telephone Override Enabled
Second Sensor Enabled:
1 = Outside Sensor
2 = Remote Room Sensor
-3°C to +3°C adjustment in 0.1°C steps
1.6°C to 3.0°C adjustment in 0.1°C steps
Settings are as modied above
To restore the factory parameters set to 1
Description
Selection of 2, 3, 4 or 5 minutes minimum
ON time
Selection of 3, 9 or 12 cph
Resistive loads 3 to 8 A
Enabled
Pump exercise enabled
Category 2 Parameters
-
System Settings (press PROGRAM
to access this category)
“Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorised Representative Honeywell International Inc.”
=
M
3.5
=
N
o
6
1.0-2.5mm²
6mm max.
1
2
3
4
5
6
7
8
1
2
3
24-230V
50-60Hz
24-230V
50-60Hz
230V
50-60Hz
230V
50-60Hz
230V
50-60Hz
24-230V
50-60Hz
24-230V
50-60Hz
24-230V
50-60Hz
d.e.
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
Typical wiring connections
Remove from packagingMount the backplate to wallFind a suitable location for mounting
Connect the wiring correctly
Attach the cover to backplate
Install the batteries (included)Attach the instruction label to ap
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