Viessmann VITOTRONIC 200 Service Instructions Manual page 189

Function check
(cont.)
Function
"Heating circuit 1"
"Heating circuit 2"
"Heating circuit 3"
"Cooling circuit SKK"
"DHW" (DHW cylinder)
"Swimming pool"
"Electr booster heater" (instantane-
ous heating water heater)
"STB Electr booster heater"
"Heat pump"
"Defrost" /
"External heat pump"
"External heat source"
With solar control module, type SM1:
"Solar"
System characteristics
Secondary pump and heating circuit pump for heating/cooling circuit
A1/HC1 are started.
Heating circuit pump for heating/cooling circuit M2/HC2 or M3/HC3 is
■
started.
Mixer for heating/cooling circuit M2/HC2 or M3/HC3 opens/closes ev-
■
ery 5 min.
:
Primary pump and circulation pump in separate cooling circuit are star-
■
ted.
Mixer for NC function opens/closes every 5 min. NC signal is activa-
■
ted.
/ :
4-way diverter valve switches over.
■
Separate cooling circuit circulation pump is started.
■
The following components are started or changed over:
Secondary pump
■
3-way diverter valve "Central heating/DHW heating"
■
Cylinder loading pump (DHW side)
■
Secondary pump starts.
■
Circulation pump for swimming pool heating and 3-way diverter valve
■
are switched on/off every minute.
Secondary pump starts.
■
When the minimum flow rate has been reached, stage 1 of the instan-
■
taneous heating water heater is started.
Stage 2 and stage 3 of the instantaneous heating water heater are
■
started at 30 s intervals.
The instantaneous heating water heater regulates to a flow tempera-
■
ture of 30 °C.
Stage 3 of the instantaneous heating water heater is switched on.
■
The secondary pump is not switched on.
■
The high limit safety cut-out must respond as soon as the temperature at
the sensor of the capillary tube reaches 85
High limit safety cut-out has responded:
■
The instantaneous heating water heater does not start with the "Electr
booster heater" function. The secondary circuit flow temperature
does not rise.
High limit safety cut-out has not responded:
■
The instantaneous heating water heater starts with the "Electr boos-
ter heater" function. The secondary circuit flow temperature rises.
Secondary pump and primary pump/fan of outdoor unit start.
■
Compressor regulates to the set value. Compressor output is set.
■
Secondary circuit regulates to a return temperature of 30 °C.
■
The defrost function starts.
■
The process ends if the evaporator temperature reaches the stop val-
■
ue.
All lag heat pumps are started for heating mode and regulated to a re-
turn temperature of 30 °C in the secondary circuit.
The external heat generator is regulated to a flow temperature of
■
35 °C.
External heat generator mixer opens.
■
Heating circuit pumps are started.
■
Solar circuit pump starts.
Service functions
8
– °C.
189