10.3.5.4 Cooling Mode Limit Values
Parameter P14
Parameter P14 is used to set the limit value for switching on the fan stages in Cooling mode.
The controller permanently monitors the water temperature and only activates Cooling mode and
the fan stages when the water temperature has fallen below the set limit value.
If the temperature as per P14 has not fallen below the limit value temperature after at most 5
minutes, the valve is closed and then reopened for 5 minutes after 4 hours (see Cyclic Opening and
Shutting of the Valve).
The cooling symbol flashes on the display if Cooling mode cannot be switched on because of the
water temperature
10.3.5.5 Cyclical Opening and Closing of the Straight Way Valve
Parameter P51, P52
The clip-on sensor can only measure the water temperature correctly in 2-pipe systems with a
straight way valve if the straight way valve is cyclically opened.
Parameters P51 and P52 can be set to cyclically open and close the valve to check the water
temperature.
If the changeover between Heating and Cooling is activated by a clip-on sensor in a 2-pipe system,
then the parameters have to be set as follows: P51 = 5 and P52 =240.
This setting opens the valve every 4 hours for 5 minutes to be able to measure the water
temperature correctly in the pipe system.
Operation
Standard Min
Max
Unit
P14
Limit value temperature to activate the fan stages in
Cooling mode
21
0
255
°C
Operation
Standard
Min
Max
Unit
P51
Duration of valve open to check water temperature
0
0
255
Minutes
P52
Duration of valve closed
0
0
255
Minutes
Ka
Control
for Venkon
ASSEMBLY AND INSTALLATION INSTRUCTIONS
1.48
Venkon
41
