Piping and Wiring for Indoor Unit   
Connecting with Outdoor Unit
Electric Heater Wiring
1(L) 2(N) 3
123
Terminal block at outdoor unit
123
Terminal block at outdoor unit
N
L
S
RT
NL
N
L
External power supply (same 
dedicated power supply for the 
indoor unit and  outdoor unit)
Power Cable Specification : The power cord connected to the outdoor unit should be complied
with IEC 60245 or HD 22.4 S4(Rubber insulated cord, type 60245 IEC 66 or H07RN-F) 
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
20mm
GN/YL
1 Phase(Ø) 3 Phase(Ø)
20mm
GN/YL
1Ø Electric Heater
1Ø Electric Heater
3Ø Electric Heater
3Ø Electric Heater
LN
Separation
Power Supply Communication Wiring
Shield cable
You should separate the communication
wiring, in case of communication wiring
length is over 40M 
56 Air-to-Water Heat Pump