1. Electric wiring
Note:
The air conditioner must use special circuit , and wiring by the qualified electrician according to the
wiring rules specified in national standard.
The grounding wire and the neutral wire shall be strictly separated. Connect the neutral wire with
grounding wire is incorrect.
The electric leakage breaker must be installed.
All the electric wire must be copper wire.When wiring,there shall keep a proper distance between the
power line and communication wire to avoid twist together. Otherwise,signal disturbance will occur,and
the air conditioner can not operate normally. Power supply: 1PH, 220-230V~, 50Hz.
The wiring method of power line is Y connection. If the power line is damaged, in order to avoid
risk of electric shock, it must be replaced by the manufacturer or its repair center or other similar
qualified person.The connecting cable must be shielded.
Fuse: T3.15A 250VAC T25A 250VAC (Please check with the outdoor unit wiring diagram.)
Please check the circuit diagram about the fuse replaced.
Wiring work
2. Wiring method
Wiring method of ring terminals
For the connection wire with ring terminals, its wiring method is as shown in
the right figure: remove the connecting screw, put the screw through the ring on the
end of the wire, then connect to the terminal block and fasten screw.
Wiring method of straight terminals
For the connection wire without orbicular terminals, its wiring method is: loosen
the connection screw, and insert the end of the connection wire completely into the Terminal block,
then fasten the screw. Slightly pull the wire outwards to confirm it is firmly held.
Crimp connection method for wires without terminals
Wiring Method for
Ring Terminal Block
Correct Pressing
Wrong Pressing
Terminal
block
Pressing
Clamps
Connect the wire with
same diameter to the
two sides of the terminal
Do not connect the
wire with same diameter
to the same side
Do not connect the
wire with different
diameters
2 way valve
3 way valve
90
o
10s
6.35mm
(1/4")
To indoor unit A
6.35mm
(1/4")
2 way valve
3 way valve
2 way valve
3 way valve
9.52mm
(3/8")
9.52mm
(3/8")
6.35mm
(1/4")
9.52mm
(3/8")
To indoor unit B
To indoor unit C
CAUTION:
If the refrigerant of the air conditioner leaks, it is necessary
to make all the refrigerant out. Vacuumize first, then charge
the liquid refrigerant into air conditioner according to the
amount marked on the nameplate.
-23-
Commercial Air Conditioner
Model: AU18
/22
2XFERA
AS072/092/122XVERA
