Honeywell CM921 Benutzerhandbuch

CM921 CHRONOTHERM

 

 

 

3

EN0H 8557 UK07 R0 09/06 

INSTALLER SET-UP 

❑  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 

 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 

Press TEMP 

 or 

 to change

e.g. 12 = AM/PM Format

24 = 24hr Format 

(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.