6.2018
33
5.3.2 Passive cooling
NOTE
Passive cooling is only possible with devices of the WPG type.
Passive cooling uses the coolness of the groundwater or earth this is why we cannot set
the desired temperature of cooling water. Cooling is activated when at least one of the
heating circuits is active.
Passive cooling will work if the difference between the supply and return temperature of the
source is higher than the parameter
Min.diff.
which is set in the
Cooling
menu.
In case the
temperature difference is smaller the pump turns on periodically for the time set in the
parameter
Checking TP
and will operate for the set time in the parameter
for
for the period
until the difference between the supply and return temperature of the source is higher than
the one set with the parameter
Min.diff.
The submersible pump turns on periodically so that the controller can acquire information
about the actual temperature of ground water from the sensors built into the device
(source). Based on this information it checks whether passive cooling is possible or not.
The operating indicator of the circulation pump for passive cooling is the
►
sign on the
display of the regulation.
NOTE
Passive cooling works in the area set in the menu
Cooling
with the parameters
T.out.
min
- external temperature above which the passive cooling can operate actively and
the parameter
Max
- external temperature until which the passive cooling can operate.
1.
Parameters
T.out.min
and
max
for setting
active cooling.
To set the parameter press key (ENTER).
2.
NOTE
Parameters for passive cooling must be set lower as the setting for active cooling!
Min.Diff.
2.0
Checking TP
2400
for
300
T.out.min
20.0°C
max
40.0°C
Summary of Contents for WPG 30
Page 62: ...62 6 2018 ...
Page 63: ...6 2018 63 ...