Installation - Haier HPU-18C03/NAF Operation Manual

Outdoor unit
Connection of pipes
To bend a pipe, give the roundness as large as possible not to crush the pipe.
Connecting the pipe of gas side first makes working easier.
The max vertical distance between the indoor unit and the outdoor unit is 20 m.
Half union
Spanner
Be careful that matters, such as wastes of sands, etc.
shall not enter the pipe.
2.Purging Method:
Push the air out of the indoor unit and piping as followes:
(1) Remove the valve cap on 2-way valve in outdoor unit.
(2) Loosen by 1/2 turn the flare nut of gas pipe gas pipe, which is conneted to
3-way valve.
(3) Loosen 2-way valve by 90 using hexagon wrench, and after approx.
6 sec tighten it up. Gas comes out through flare nut on wide pipe. If no
gas is discharged, tighten flare nut with specified torque.
(4) Open 2-way and 3-way valves using specified torque.
(5) Tighten the caps on the valves with specified torque
When additional refrigerant is necessary, first purge air out of connecting pipe by external gas, then drive
out the excessive refrigerant by purging method.
Brand new unit is charged 50g more refrigerant than spec. This is only for first installation to purge air in the
indoor unit and connecting pipe.
When piping is longer than 5m, charge additional refrigerant specified in this list:
Pipe lengt
Refigerant charge(g)
Indoor unit
Outdoor unit
Max.Elevation:B=10m
Max. Length:A=20m
Outdoor unit
Flare nut
Torque wrench
5m 15m
10m
200
100
Outdoor unit
Indoor unit
Forced fastening without careful centering
may damage the threads and cause a
leakage of gas.
Pipe Diameter (
Liquid side 6mm(1/4")
Liquid side 9mm(3/8")
Gas side 9mm(3/8")
Gas side 12mm(1/2")
Gas side 15.88mm(5/8")
Liquid side
2-way valve
5m
Pipe lengt
Refigerant charge(g)
Outdoor unit
CAUTION
In case more than 5 metres oil trap
should be installed every 5~7m.
Fastening torque
)
18N.m
42N.m
40N.m
50N.m
60N.m
Gas side
3-way valve
Gas side
Liquid side
9.52mm (3/8") 15.88mm (5/8")
2-way valve
3-way valve
10m
15m
300
600
Oil trap
Indoor unit
9