Vaillant flexoTHERM exclusive VWF 117/4 Installation And Maintenance Instructions Manual page 58

Appendix
HE2 Evaporator
HE4 Evaporator for intermediate injection
HG1 Auxiliary electric heater
PT10 Low-pressure sensor
PT11 High-pressure sensor
PT20 Heating circuit pressure sensor
PT30 Brine pressure sensor
PZ11 High-pressure switch
TT10 Compressor inlet temperature sensor
TT11 Compressor outlet temperature sensor
TT14 Intermediate injection compressor inlet temperature
sensor
58
TT17 Electronic expansion valve outlet temperature
sensor
TT20 Heating return temperature sensor
TT21 Heating flow temperature sensor
TT30 Source inlet temperature sensor
TT31 Source outlet temperature sensor
TZ11 Compressor outlet temperature switch
TZ21 Safety cut-out temperature switch
V1 Electronic expansion valve
V2 3-way valve for hot water
V5 Electronic expansion valve for intermediate injection
V7 4-2-way valve
Installation and maintenance instructions flexoTHERM exclusive 0020213394_01