Viessmann Vitocal 222-S, Инструкция по установке и обслуживанию

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97
Draining secondary side heat pump
1. Close the on-site boiler drain & fill
valve. 2. Drain the heat pump at the secondary
circuit fill & drain valve (see chapter
"Overview of internal components:
Internal unit").
Checking the sensors
Sensor Captur-
ing ele-
ment Installed loca-
tion Connection to
■ Outside temperature sensor (F0)
■ Cooling circuit flow temperature
sensor (direct heating circuit A1/
HC1 or separate cooling circuit
SKK) (F14)
■ Room temperature sensors
Ni 500 Internal unit (see
page 91) Controller and
sensor PCB (see
page 55)
■ Buffer temperature sensor (F4)
■ Cylinder temperature sensor (F6)
■ System flow temperature sensor
(F13)
Pt 500
■ Compressor head temperature
sensor (hot gas) (CTT)
NTC
50 kΩ External unit
(see page 93) Refrigerant circuit
controller
(observe label in
the external unit)
■ Secondary circuit flow tempera-
ture sensor upstream of instanta-
neous heating water heater
(LWT)
■ Liquid gas temperature sensor
(IRT)
NTC
10 kΩ Internal unit (see
page 48) AVI PCB (see
page 55)
■ Evaporator refrigerant inlet tem-
perature sensor (OCT)
■ Evaporator temperature sensor
(OMT)
■ Evaporator air intake tempera-
ture sensor (OAT)
External unit
(see page 93) Refrigerant circuit
controller
(observe label in
the external unit)
Troubleshooting
Repairs
(cont.)
5600 950 GB
Service