Checking The Temperature Sensors - Viessmann Vitocal 200-S Installation And Service Instructions For Contractors

Draining secondary side heat pump
2. Drain the heat pump at the secondary circuit fill &
drain valve (see chapter "Overview of internal com-
ponents: Internal unit").

Checking the temperature sensors

Temperature sensor
Outside temperature sensor (F0)
■
Buffer temperature sensor (F4)
■
Cylinder temperature sensors top (F6) and
■
bottom (F7)
System flow temperature sensor (F13)
■
Cooling circuit flow temperature sensor (direct
■
heating circuit A1/HC1 or separate cooling
circuit SKK) (F14)
Boiler water temperature sensor, external
■
heat generator (F20)
For heat pump cascades: buffer outlet tem-
■
perature sensor (F23)
Room temperature sensors
■
For heat pump cascades: swimming pool flow
■
temperature sensor (F21)
Secondary circuit flow temperature sensor
■
(F8)
Secondary circuit return temperature sensor
■
(F9)
Secondary circuit flow temperature sensor
■
upstream of the instantaneous heating water
heater (LWT)
Liquid gas temperature sensor (IRT)
■
Temperature sensor, refrigerant inlet, evapo-
■
rator (OCT)
Temperature sensor, evaporator (OMT)
■
Temperature sensor, air intake, evaporator
■
(OAT)
Temperature sensor, compressor head (hot
■
gas) (CTT)
(cont.)
Test ele- Installed location
ment
NTC 10 k Indoor unit (see
Ω
page 63)
NTC 20 k Indoor unit (see
Ω
page 63)
Pt500A Indoor unit (see
(PTC) page 63)
NTC 10 k Indoor unit (see
Ω
page 63)
NTC 10 k Outdoor unit (see
Ω
page 63)
NTC 50 k Outdoor unit (see
Ω
page 63)
Maintenance
Connection
Controller and sensor
PCB (see page 31)
Controller and sensor
PCB (see page 31)
Controller and sensor
PCB (see page 31)
AVI PCB (see service
instructions
"Vitotronic 200,
type WO1C")
Refrigerant circuit con-
troller (observe label on
the outdoor unit)
Refrigerant circuit con-
troller (observe label on
the outdoor unit)
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