Solar Dhw Heating - Viessmann VITOTRONIC 200 Service Instructions Manual

DHW heating
(cont.)
DHW reheating ON
"Enable elec. heating/ext. HS for reheating only
6040" = "0"
All of the following criteria must be met:
The cylinder temperature falls below the current set
■
value by "Hysteresis DHW temperature booster
heater 6008".
"Temperature rise per hour for DHW heating
■
600D" is not being reached with DHW heating by the
heat pump.
General operating conditions for the respective boos-
■
ter heater are met.
The compressor stays switched on during DHW reheat-
ing.
DHW reheating OFF
"Enable elec. heating/ext. HS for reheating only
6040" = "0"
Instantaneous heating water heater:
Set cylinder temperature has been reached.
■
or
The flow temperature in the secondary circuit reaches
■
the max. flow temperature less the "Shutdown hys-
teresis inst. heating water heater 601E".
External heat generator/immersion heater:
The set cylinder temperature less the hysteresis of
■
1 K has been reached, measured at the upper cylin-
der temperature sensor.

Solar DHW heating

Solar DHW heating can be controlled via the solar con-
trol module, type SM1.
Frost protection
The heat pump control unit starts the booster heaters
when the temperature at the cylinder temperature sen-
sor falls below 3 °C:
■ Instantaneous heating water heater (part of standard
delivery, as accessory or on site, depending on heat
pump type)
■ External heat generator
Immersion heater (as an accessory or on site,
■
depending on heat pump type)
Buffer cylinder
Provision must be made for a buffer cylinder in the
case of heating/cooling circuits with mixer.
"Enable elec. heating/ext. HS for reheating only
6040" = "1"
One of the following criteria must be met:
Max. flow temperature in the secondary circuit has
■
been reached.
There is a fault in the heat pump.
■
The compressor was switched off externally, e.g. dur-
■
ing power-OFF.
The compressor stays switched off during DHW re-
heating.
"Enable elec. heating/ext. HS for reheating only
6040" = "1"
Set cylinder temperature has been reached.
Installation and service instructions "Solar con-
trol module, type SM1"
Note
To protect the DHW cylinder against frost, the heat
pump control unit switches the immersion heaters on
even when they are disabled for DHW heating ("Ena-
ble electric heaters for DHW heating 6015" set to
"0").
Heating for frost protection ends if the temperature at
the top cylinder temperature sensor exceeds 10 °C.
Exception: If the installation kit with mixer (accesso-
ries) is installed in a heat pump compact appliance, the
heating circuit with mixer M2/HC2 can be connected
directly ("Type of assembly kit 7044" set to "1"). In
this case, the parameters for the buffer cylinder cannot
be adjusted.
Function description
43