Installer set-up – Honeywell cm921 User Manual
Page 3
CM921 CHRONOTHERM
3
EN0H 8557 UK07 R0 09/06
INSTALLER SET-UP
In Installer set-up we can:
❑ Set-up specific applications parameters
❑ Enable special features
❑ Configure system timing master for the zoning system
To enter the installer set-up mode:
a) Move the slider switch to the OFF position.
b) Press and hold the INFO
i
button and the two program
buttons ‘< >’ together.
c) The unit will display the first parameter of installer
parameter group category 1 (from n.1 to n.19).
d) Press the TEMP
or
buttons
to change the factory
setting. The display will flash indicating that a change has
been made.
e) Press the green OK button to confirm this change and the
display will stop flashing.
f) Press
the + button to go to the next parameter.
g) Press the program button
>
to go to category 2 in the
Installer mode (from n.1 to n.14).
h) To exit the installer mode, move the slider switch to the
AUTO or MAN positions.
Abbreviated Set-Up Description
e.g. Cl = Clock Format
Factory Setting or New Choice
Press TEMP
or
to change
e.g. 12 = AM/PM Format
24 = 24hr Format
Installer Set-up Number
(Press
+ or - to change)
e.g. 1 = Clock Format
Brief Description of the
Parameter Function.
Specific Applications
Setting
What do you need to change?
Cycle/
Hour
Minimum
ON time
(in minutes)
Note : All parameters listed below belong to category 2 – System
Parameters (see Installer Parameters Table)
Heating Gas
Boilers
(<30KW)
6
1
No changes required
Oil Boiler
3
4
1. Set Minimum ON Time to 4 minutes.
2. Set Cycle/Hour to 3.
Thermal Actuator
12
1
Set Cycle/Hour to 12.
Zone valve
6
1
No changes required.
Air
conditioning
1. Configure the thermostat to allow switching between heating
and cooling modes (set parameter n.4:HC to 1)
2. Set the thermostat accordingly to the required mode of
operation (heating or cooling) by pressing the TEMP
or
buttons together for 5 seconds.
Modify the cooling program
as required.
Heat Pump/
Air conditioner
3
4
1. Set Minimum ON Time to 4 minutes.
2. Set Cycle/Hour to 3.
Fan coil
6
1
No changes required.