Functional diagram
⑭
Tw3
③
⑧
⑪
No.
①
Service valve(R)
②
Strainer
③
Flow switch
④
Heat exchanger
⑤
Backup heater
⑥
Pressure relief valve
⑦
Air-vent valve
⑧
Variable Speed water pump
⑨
Expansion tank
⑩
Manometer
⑪
Service valve(L)
⑫
Water temp . sensor 1
⑬
Water temp . sensor 2
⑭
Water temp . sensor 3
⑦
⑥
⑤
⑨
⑩
ENGLISH-11
Tw2
⑬
④
Tw1
⑫
②
①
Note