System With Heating Water/Coolant Buffer Cylinder - Viessmann VITOTRONIC 200 Service Instructions Manual

Function description
Active cooling function (AC)

System with heating water/coolant buffer cylinder

The coolant is fed into the heating water/coolant buffer
cylinder which supplies a maximum of 3 heating/cool-
ing circuits.
Required parameter settings
■ "Enable buffer cylinder/low loss header 7200" set
to "2"
"Buffer cyl operating mode 721F" set to "1"
■
Swimming pool heating
The heat pump control unit supports heating of a
swimming pool.
■ For swimming pool heating, the heat pump demand
is issued externally by the temperature controller for
regulating the swimming pool temperature.
Swimming pool heating is controlled via the
■
EA1 extension with KM-BUS.
■ In the delivered condition, swimming pool heating
has the lowest priority compared to central heating/
central cooling and DHW heating.
Priority of swimming pool heating over central heat-
ing/central cooling can be changed with "Priority
external demand 7019".
■ The set flow temperature for swimming pool heating
is specified as follows:
– "Flow temperature for external demand 730C"
or
Analogue voltage signal at "0 - 10 V" input of EA1
–
extension
The higher value is used.
Switching swimming pool heating on and off
When the temperature controller for regulating swim-
ming pool temperature issues a heat demand, the heat
pump switches on.
In heat pump cascades, the lead and/or lag heat
pumps can be switched on, depending on the heat
demand.
Note
The instantaneous heating water heater and the exter-
nal heat generator cannot be used for swimming pool
heating.
56
/
(cont.)
"Cooling function 7100" set to "3"
■
"Cooling 2030" and/or "Cooling 3030" and/or
■
"Cooling 4030" set to "2"
■ In heat pump cascades consisting of heat pumps
with output-dependent control (
pool flow temperature sensor is additionally required
(connection F21 on the controller and sensor PCB).
Based on this flow temperature, the heat pumps can
be operated in the optimum output range.
■ A filter circuit pump cannot be controlled via the heat
pump control unit.
Enabling required
Parameter
"External extension 7010"
"Swimming pool 7008"
During swimming pool heating, the compressor and
the secondary pump are operational. At the same time,
the "Swimming pool heating" 3-way diverter valve is
switched to position "Swimming pool" and the circula-
tion pump for swimming pool heating is started. The
buffer cylinder is then no longer heated up.
Swimming pool heating ends as soon as the heat
demand from the temperature controller for regulating
the swimming pool temperature ceases.
System examples with swimming pool heating:
www.viessmann-schemes.com
/ ), a swimming
Setting
"1" or "3"
"1"