Refrigerant Piping - Haier AC142ACNAC Service Manual

Fig. 25
(a) Concrete foundation
Unit
Anchor bolt Concrete foundation
To fix by bolts
Anchor bolt
Note (1)Give enough room for the concrete
foundation to fix anchor bolts.
Install the unit so that the angle of inclination must be less than
3 degrees.

3. Refrigerant piping

(1) Outline of piping
Flare connection
3-way valve
Gas pipe
Indoor
unit
Liquid
pipe
2-way valve
Flare connection
For series 14,18
(2) Piping size
Series 14,18
Series 24,28
Series 36,42
(5) Purging mehtod ( the refrigerant is R407C )
To use vacuum pump
1
Detach the service port's cap of 3-way valve, the
valve rod's cap for 2-way valve and 3-way's, connect
the service port into the projection of charge hose
(low) for gaugemanifold. Then connect the projection
of charge hose (center) for gaugemanifold into
vacuum pump.
(b) Foundation anchor
Anchor bolt
For series 36,42
Unit
Concrete foundation
For series 24,28
Note (1)Place the concrete
foundation deep enough.
Flare connection
Gas pipe
Outdoor
Indoor
unit
unit
Liquid
pipe
For series 24,28,36, 42
Liquid pipe
6.35x0.8mm
Gas pipe
15.88x1.0mm
Liquid pipe 9.52x0.8mm
Gas pipe 15.88x1.0mm
Liquid pipe
9.52x0.8mm
Gas pipe 19.05x1.0mm
INSTALLATION INSTRUCTIONS
Install the removed flare nuts
to the pipes to be connected,
then flare the pipes.
Unit
(3) Limitations for one way piping length and vertical
height difference.
Concrete
foundation
One way piping length: Less than 15 mm
Vertical height difference: Less than 5 m
Precautions for refrigerant piping
Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.
(4) Piping connection (Fig.26)
Connecting method
Apply refrigerant oil at half union as large and flare nut.
To bend a pipe, give the roundness as possible not to
crush the pipe.
When connecting pipe, hold the pipe centre to centre
Check joint then screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands
Service
enter the pipe.
Outdoor
unit
Flare connection
Forced fastening without
centering may damage the
threads and cause a gas
leakage.
Liquid Side
6.35mm (1/4")
Gas Side
15.88mm (5/8")
2-way valve
For series 14,18
3-way valve
Gaugemanifold
Vacuum pump
90 •0.5
(Fig. 26)
Pipe dia Fastening torque
18N . m
Liquid pipe 6.35mm
60N . m
Gas pipe 15.88mm
40N . m
Liquid pipe 9.52mm
110N . m
Gas pipe 19.05mm
2-way valve
3-way valve
Gaugemanifold
Vacuum pump
For series 24,28
2-way valve
3-way valve
Gaugemanifold
Vacuum pump
For series 36,42