Refrigeration Diagram - Fujitsu WATERSTAGE 112 Maintenance Document

Heat Pump, Split System, Single Service, 3 phase
1.4

Refrigeration Diagram

Outdoor Unit
TH
Pressure
HO
check valve
TH
O
Heat
exchanger
TH
TH
HM
D
TH
C
Compressor Compressor
with with
Injection port Injection port
Expansion valve
inlet thermistor
Strainer
Expansion Valve
TH : Compressor temperature sensor
C
TH : Discharge temperature sensor
D
TH : Outdoor exchanger middle temperature sensor
HM
Maintenance Document 1394-1
Strainer
4- Way
valve
Accumulator
Injection Injection Injection
expansion valve expansion valve expansion valve
Solenoid valve S olenoid valve
Injection circuit
Strainer
Hydraulic Unit
Pressure sensor
Water
heat
exchanger
TH
TH : Outdoor exchanger outlet temperature sensor
HO
TH : Outdoor temperature sensor
O
TH : Exchanger temperature sensor
PI
Expansion vessel
Circulation pump
Hot water
column sensor
Air bleeding valve
Auxiliary heater
Buffer
tank
Pressure safety
valve
Supply/drain
port
PI
Pressure
gauge Hot water
return sensor
Heating
unit
(Floor
heating,
radiator,
etc)
9