Fujitsu WGYA050DG6 Design & Technical Manual page 106

42 PIPING DIAGRAM
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MODEL : WGA050DG, WGA100DG,
WGG140DG, WGYK160DG9
Outdoor unit
Refrigerant
Air venting valve
Auxiliary heater *
Buffer tank
Expansion tank
Water heat
exchanger
Pressure
safety valve
Supply/drain port
Water return temp. sensor
DHW tank
Water heat
exchanger
- (HU01 - 10) -
Water flow temp. sensor
Pressure
Distribution
gauge
valve
Circulation
pump
DHW tank
temp.sensor
DHW backup
heater
Drain port
*: WGY model only
Hydraulic unit / Split DHW integrated
Heating terminal
(Floor heating,
Radiator, etc.)
Hot water
Hot water
Cold water
supply