Alfa Laval Micro - CM721- Category 2: System Settings; Using the Room Thermostat for Specific Applications

Alfa Laval Micro
Installation, service and operating instruction
41
CM721- Category 2: System Settings
12.3.2
Parameter
Parameter
No.
Factory Default Setting
Optional Setting
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
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
Note
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 press the AUTO or MAN button.
Using the room thermostat for specific applications 12.3.3
Specific Application
Setting
What to change
Cycle/Hour
Minimum ON Time
Note: All parameters listed below
belong to category 2 - System
Parameters
Heating
Gas Boiler (<30kW)
6
1
No changes required
Oil Boiler
3
4
Set 1:Ot parameter to 4
Set 2:Cr parameter to 3
Thermal Actuator
12
1
Set 2:Cr parameter to 12
Zone Valve
6
1
No changes required