Trane 4TXM2318BF300AA Service Manual page 96

Pump Down Operation
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve caps from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After five to ten minutes, close the liquid stop valve with a
hexagonal wrench.
4) After two to three minutes, close the gas stop valve and stop
forced cooling operation.
Wiring work
1. Electric wiring
• 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.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(Electronic control unit) T25A 250VAC(Power circuit board). Please check the circuit
diagram about the fuse replaced.
2. Wiring method
• Wiring method of orbicular terminals
For the connection wire with orbicular 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
• Crimp connection method for connection wire
After connection,the wire must be fastened by wire cover. The wire cover shall press on the protection coat of the
connection wire,as shown in right top figure.
Note:
When connecting the wiring,confirm the terminal number of indoor and outdoor units carefully. Incorrect wiring will
damage the controller of air conditioner or the unit can not operate.
liquid
stop valve
Gas
stop valve
Correct Pressing
94
Hexagonal
wernch
Close
Valve cap
Wiring Method for Ring
Terminal Block
Wrong Pressing
Terminal
block
Pressing
Pressing
clamps
Clamps