Viessmann VITOCAL 151-A - Refrigerant circuit flowchart

143
Labelling of the sensors in acc. with EN 1861:
High pressure sensor
Low pressure sensor
Temperature sensor
High pressure switch PSH
High limit safety cut-out
Flow rates:
■
Secondary side (heating water)
Min. flow rate: 0.350 m
3
/h (350 l/h)
Max. flow rate: 2.050 m
3
/h (2050 l/h)
■
Primary side (air)
Min. air flow rate: 2900 m
3
/h
Max. air flow rate: 5300 m
3
/h
Heating mode
1
2
3
4
5
6
7
9
wR
eQ
8
qP
qQ
qW
qE
qR
qT
qZ
qI
qO
wP
wQ
wW
wE
wT
wZ
wU
wI
wOeP
eW
eE
qU
Fig. 86
1
Evaporator
2
Air discharge
3
Air intake temperature sensor
4
Air intake
5
Electronic expansion valve 1
6
Liquid gas temperature sensor, heating
7
Schrader valve, high pressure side 2
8
Filter, electronic expansion valve 1
9
Secondary circuit return
qP
Secondary circuit flow
qQ
Secondary circuit flow temperature sensor
qW
Condenser
qE
Liquid gas temperature sensor, condenser
qR
Heat exchanger
qT
Inverter
qZ
Refrigerant collector
qU
Schrader valve, high pressure side 1
qI
Inverter temperature sensor
qO
Suction gas temperature sensor, evaporator
wP
4-way diverter valve
wQ
High pressure sensor
wW
High pressure switch PSH
wE
Hot gas temperature sensor
wR
High limit safety cut-out
wT
Compressor temperature sensor
wZ
Compressor
Outdoor unit maintenance
Refrigerant circuit flowchart
6171817
Maintenance