Viessmann VITOTRONIC 200 Service Instructions Manual page 31

Cooling functions
Active cooling is only possible outside a
power-OFF period, and must be enabled
separately by the system user.
To ensure the transfer of the high cooling
capacity in active cooling mode at all
times, do not install a mixer in the
cooling circuit.
Swimming pool heating
Compared with the remaining heat con-
sumers, swimming pool heating has the
lowest priority ("Swimming pool
7008").
■ Swimming pool heating is controlled
via external extension H1 with KM
BUS.
■ A filter circuit pump must be connected
separately.
■ If the components for swimming pool
heating are connected to external
extension H1, no other function (e.g.
external changeover of the operating
status) can be realised.
The heat demand is issued by the control
thermostat used for swimming pool tem-
perature control.
(cont.)
A mixer can only be used with natural
cooling, and particularly in cooling mode
for underfloor heating circuits, keeps the
flow temperature above the dew point.
The heat pump control unit sets a con-
stant flow temperature "Flow tempera-
ture for external demand 730C".
When there is a heat demand, the 3-way
diverter valve for "Swimming pool heat-
ing" and the circulation pump for swim-
ming pool heating are started.
The swimming pool is heated until the
demand signal from the temperature
controller clears. Renewed heating is
only possible after a pause of at least
20 min.
Installation and service instruc-
tions of the relevant heat pump
and "Heat pump system exam-
ples".
Function description
31