Haier 2HUM18HC03-R2 Installation Manual - page 3
3
Outdoor unit
Install according to the instructions on the 1st page of this manual
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 rst makes working easier.
Ensure the interconnecting tubing is approved for R410A.
Installation of Outdoor Unit
Half union
Flare nut
Torque wrench
Spanner
Forced fastening without careful centering may
damage the threads and cause a leakage of gas.
1
Connection of pipes
2
1. If the supply cord is damaged, it must be replaced by the manufacturer or its
service agen. The type of connecting wire is H05RN-For H07RN-F.
2. If the fuse on PC board is broken please change it with the type of
3. The wiring method should confirm to local electrical codes.
4. Use an HVACR circuit breaker or time delay fuse.
T.3.15A/250VAC (Indoor), T.25A/250VAC (Outdoor), the fuse must be
changed by an authorized servicer.
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.
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.
Note
When connecting the cable, con rm the terminal number of indoor and
outdoor units carefully. If wiring is not correct, the unit will not operate
When connecting the cable after installing the indoor unit
When connecting the cable before installing the indoor unit
HSU218VHG-W
2HUM18HC03/R2(DB)
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.
Pipe Diameter( )
Fastening torque
Liquid side6.35mm(1/4")
18N.m/13.3Ft.lbs
Liquid/Gas side9.52mm(3/8") 42 N.m/30.1Ft.lbs
Gas side 12.7mm(1/2")
55N.m/40.6Ft.lbs
Gas side 15.88mm(5/8")
60 N.m/44.3Ft.lbs
properly and could cause a defect.
Ensure that no dirt or debris enters the tubing. The standard tubing length is 25ft/7.6m.
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.
Pipe cutting is carried out with a pipe cutter and burs must be removed.
After inserting the are nut, aring work is carried out.
Cutting and Flaring Work of Piping
Flare tool for R410A
Conventional are tool
Clutch-type
clutch-type(Rigid-type) Wing-nut type (Imperial-type)
A
0~0.5mm
1.0~1.5mm
1.5~2.0mm
0~1/51 inch
3/76 ~1/17 inch
1/17 ~1/8 inch
Flare tooling die
1.Cut pipe
2.Remove burs
3.Insert the are nut
4.Flare pipe
Lean Damage of are
Partial Too outside
t
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r
r
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I
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r
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o
C
Crack
In case the elevation B is more than 5m,
oil trap shoud be installed every 5~7m
Max. Length: B1 max = 20m/65ft B2 max = 20m/65ft
Max.Elevation: A1 max =15m/50ft A2 max =15m/50ft
In case the pipe total length (B1+B2) is more than
20m/65ft, the refrigerant should be charged, according
to 20 g/m.
B
Outdoor unit
Indoor unit
A1
B1
Indoor unit
A2
B2
Outdoor unit
Indoor unit
B1
Indoor unit
B2
Outdoor unit
Indoor unit
Oil trap
A3
A3 max =15m/50ft
(B1+B2) max = 30m/100ft
Outdoor unit
Indoor unit
A1
B1
Indoor unit
A2
B2
CAUTION
Indoor unit
Outdoor unit
Indoor unit A
Indoor unit B
power
{
3wire 14AWG²
4wire 14AWG²
1(L)
2(N)
Control wiring :
Control wiring :
Power cable:
3 Wire with ground 12AWG