Haier HSU24VHJ(DB) Service Manual page 71

Indoor uni t
4wire 18AWG
Control Wiring
HSU09VHJ(DB)-W
Power cable:
HSU12VHJ(DB)-W
Power cable:
HSU18VHJ(DB)-W
Power cable:
HSU24VHJ(DB)-W Power cable:
All models: Control cable: 4wire, 18AWG
Indoor unit
HSU09XCK-W Power cable:
Power cable:
HSU12XCK-W
1. If the fuse on PC board is broken please change it with the type of
T. 3.15A/250V(indoor unit),25A/250V(outdoor unit).
2. The wiring method should be in line with the local wiring standard.
3. After installation, the power plug should be easily reached.
4. A breaker should be incorporated into xed wiring. The breaker should be
all-pole switch.
Outdoor unit
1
Installation of Outdoor Unit
Drawing for the installation of indoor and outdoor units
Install according to
2 Connection of pipes
To bend a pipe, be careful not to crush the pipe,
and the bending radius should be 30 (1 1/6) to 40 mm (1 4/7) or longer.
Connecting the pipe of gas side rst makes working easier.
The connection pipe is specialized for R410A.
Forced fastening without careful centering may
Half union
Flare nut
damage the threads and cause a leakage of gas.
Pipe Diameter( )
Liquid side6.35mm(1/4")
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2")
Spanner Torque wrench
Gas side 15.88mm(5/8")
HSU
Outdoor unit
{
Power
Wiring
2wire with ground 16AWG
2wire with ground 16AWG
2wire with ground 12AWG
2wire with ground 12AWG
Outdoor unit
2wire with ground 16AWG
2wire with ground 16AWG
Fastening torque
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
VHJ(DB)-SM
Ensure that no dirt or debris enters the pipe.
The standard pipe length is 7m (27 9/16) . If it is over 7m (27 9/16) , the function
of the unit will be affected. If the pipe has to be lengthened, the refrigerant should
be charged, according to 20 g/m (0.018 oz/inch). But the charge of refrigerant must
be conducted by professional air conditioner servicer. Before adding additional
refrigerant, perform air purging from the refrigerant pipes and indoor unit using
a vacuum pump,then charge additional refrigerant.
CAUTION
B
Outdoor unit
Outdoor unit
B
A
3
Connection
Take off the panel(top), by removing the 5 screws.
Remove the plugs on the conduit plate.
Temporarily mount the conduit tubes on the conduit plate.
Connect both the power supply and unit wire harness to
the corresponding terminals on the terminal board.
Ground the unit in accordance with local codes.
Allow several extra inches of wire for making wiring
connections.
Use lock nuts to secure conduit tubes.
4
Attaching Drain-Elbow
If the drain-elbow is used,
please attach it as gure. (Note:
Only for heat pump unit.)
5 Purging Method:To use vacuum pump
1.
Remove the service port cap of the 3-way valve and the valve stem cap for both
valves. Connect the low pressure hose from the manifold set to the 3-way valve.
Connect the center hose to the vacuum pump.
2.
Open the handle on low side of manifold and
side gauge reaches a vacuum immediately, ensure the hoses are connected
properly and the low side manifold handle is open.
3.
Vacuum for a minimum of 15 minutes and check the gauge for a proper vacuum.
After the completion of vacuuming, close the handle 'Lo' in gaugemanifold and
stop the operation of the vacuum pump.
the vacuum level again in 1-2 minutes. If you lose the vacuum, ensure all
connections are tight and flare the tubes again if needed.
4.
Open the valve rod stem the 2-way valve counterclockwise to 90 degrees.
After 6 seconds, close the 2-way valve and inspect for gas leakage.
Outdoor unit
Indoor unit
B
A
A
Max.Elevation: Amax=10m
In case the elevation A is more
than 5m, oil trap shoud be
installed every 5~7m
Oil trap
Max. Length: Bmax=15m
Indoor unit In case the pipe length B is
more than 10m, the refrigerant
should be charged, according
to 20 g/m.
operate vacuum pump. If the low
Leave the hoses connected and check
Indoor unit
3