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10 CM900 Wireless - Programmable Room Thermostat
4.5.2 Category 2 - System Settings
Notes
1) Remember to always press the green button to confirm 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 position.
2) These parameters are set centrally for the zoning system at the room thermostat configured as the
system synchroniser.
3) Minimum on-time setting applies only to the boiler controller. All Relay Box zone controllers will work
with the minimum on-time of 30 seconds.
Parameter Parameter
No.
Factory Default Setting Optional Setting
Category 2 Parameters – System Settings (press the button to access this category)
Display Description Display Description
Minimum boiler
ON time
1:Ot 1 1 minute minimum
ON time
2 to 5 Selection of 2, 3, 4 or 5 minutes
minimum ON time
Cycle Rate 2:Cr 6 6 cycles per hour
(cph)
3,9 or
12
Selection of 3, 9 or 12 cph
Heat/Cool Change 4:HC 0 Disabled 1 Enabled
Pump Exercise 5:PE 0 Pump exercise
disabled
1 Pump exercise enabled
System
Synchronisation
6:Sn 0 Standard operation of
the Room Unit
1 Room unit configured as Synchroniser
Loss of
Communications
Instruction
7:LC 0 Relay Off 1 Relay 20% on / 80% off
The following Parameters are for the control of other Honeywell Wireless products such as Wireless Underfloor Heating
controls and Wireless Radiator controls. For more information please contact Honeywell sales.
Room Temperature
Sensor Use
8:Su 0 BDR91 control 1,2,3
or 4
1 - HR80/HM80 control with own/remote
sensor (no temperature displayed)
2 - HR80/HM80/HCE80 control with CM
sensor
3 - BDR91 control and HR80/HM80/
HCE80 control with own/remote sensor
4 – Hr80/HM80/HCE80 control with own/
remote sensor (temperature displayed)
HR80 Window-
Open Function
9:HO 0 Disabled 1 Enabled
HR80 Local
Override
10:HL 1 Enabled 0 Disabled
Maximum Flow
Setpoint
11:uF 55 55°C Maximum Flow
Temp.
0 to 99 0°C to 99°C adjustment in 1°C steps
Minimum Flow
Setpoint
12:LF 15 15°C Minimum Flow
Temp.
0 to 50 0°C to 50°C adjustment in 1°C steps
Mixing Value Run
Time
13:Ar 150 150 seconds 0 to
240
0 to 240 sec. adjustment in 1sec steps
Pump Overrun Run
Time
14:Pr 15 15 minutes 0 to 99 0 to 99 mins adjustment in 1min steps