Haier HSU-09HEG03/R2(DB) Service Manual page 70

4
Connecting the indoor/outdoor Electric Cable
Removing the wiring cover
●
Remove terminal cover at right bottom corner of indoor unit, then take off
wiring cover by removing its screws.
When connecting the cable after installing the indoor unit
1. Insert the cable from the outside into the unit through the same
hole that has the interconnecting tubing.
2. Pull out the cable on the front side, and connect the cable
making a loop.
When connecting the cable before installing the indoor unit
●
Insert the cord from the back side of the unit, then pull it out on the front side.
● Fasten the unit wire harness to the conduit holder using the lock nut.
● Position the conduit holder to its original state using screw.
Note
When connecting the cable, confirm the terminal number of indoor and
outdoor units carefully. If wiring is not correct, the unit will not operate
properly and could cause a defect.
Indoor unit
4wire 18AWG
(4G0.75mm )
Control Wiring
HSU09VHG(DB)-W
HSU12VHG(DB)-W
Power cable: 2wire with ground 16AWG
Indoor unit
4wire 18AWG
(4G0.75mm )
Control Wiring
HSU18VHG(DB)-W
HSU24VHG(DB)-W
Power cable:
2wire with ground 12AWG (4G0.75 mm )
1. If the supply cord is damaged, it must be replaced by the manufacturer or its
service agent or a similar qualified person. The type of connecting wire is
H05RN-F or H07RN-F.
2. If the fuse on PC board is broken please change it with the type of
T.3.15A/250VAC (Indoor), T.25A/250VAC (Outdoor).
3. The wiring method should be in line with the local wiring standard.
4. Use an HVACR circuit breaker or time delay fuse.
Outdoor unit
2
{
Power
Wiring
(4G0.75 mm ) 2
Outdoor unit
2
{
Power
Wiring
2
Outdoor unit
Installation of Outdoor Unit
1
Install according to the instructions on the 1st page of this manual
Connection of pipes
2
●
When bending the interconnect tubing, ensure the radius is at least 1 1/4" to 1 3/4",
30mm to 40mm to ensure against crushing the tubing.
●
Connecting the pipe of gas side first makes working easier.
●
Ensure the interconnecting tubing is approved for R410A.
Half union
Flare nut
Spanner
Torque wrench
Ensure that no dirt or debris enters the tubing. The standard tubing length is 15 ft., 5M.
If a different length is required, adjust the refrigerant amount by 1/4 oz/ft, 20 g/M for the
9k, 12k and 18k models. For the 24k model, adjust by 1/2 oz/ft, 40 g/M.Before opening
the service valves, evacuate the interconnecting tubing and indoor unit. Follow the
instruction in section 5 on page 4.
CAUTION
B
Outdoor unit
Outdoor unit
B
A
Cutting and Flaring Work of Piping
●
Pipe cutting is carried out with a pipe cutter and burs must
●
After inserting the flare nut, flaring work is carried out.
Flare tool for R410A
Clutch-type
0~0.5mm
A
0~1/51 inch
Flare tooling die
Correct
Lean
67
Installation
Forced fastening without careful centering may
damage the threads and cause a leakage of gas.
Pipe Diameter(ǿ)
Liquid side6.35mm(1/4")
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2")
Gas side 15.88mm(5/8")
Outdoor unit
Indoor unit
A
A
•
Max.Elevation: Amax
= 32ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
•
In case the elevation A is more
Oil trap
than 15ft / 5m, oil trap shoud be
installed every 5~7m
Indoor unit
•
Max. Length: Bmax
= 50ft / 15m (09k / 12k)
= 80ft / 25m (18k / 24k)
be removed.
Conventional flare tool
clutch-type(Rigid-type) Wing-nut type (Imperial-type)
1.0~1.5mm 1.5~2.0mm
3/76 ~1/17 inch 1/17 ~1/8 inch
1.Cut pipe 2.Remove burs
4.Flare pipe
3.Insert the flare nut
Incorrect
Damage of flare Crack Partial
Domestic air conditioner
Fastening torque
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
B
Indoor unit
Too outside