Haier HPU-18H03 Operation Manual page 26

Installation Manual of Room Air Conditioner
1. Piping connection of the outdoor unit Connecting the connecting pipe and inlet and outlet liqued pipe
according to the piping method.
2.The connecting method of U-model terminal block:
Release the screws, put the connecting wire's U-model terminal block between the screw and
terminal-block Base, then tighten the screws. Draw the wire lightly to make sure the block have
been compacted.
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, which is conneted to
3-way valve.
(3) Loosen 2-way valve by 90
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.
Outdoor unit
Indoor unit
Max.Elevation:
for 18K 24K: 10m
Note: When extending piping, air inside piping shall be removed by using external refrigerant gas,
charge according to the following list.
Brand new outdoor unit is charged 50g or 80g(24k) more refrigerant than regulated weight. Only for
first installation, this extra 50g or 80g(24k) can be used to purge airin pipes.
During this procedure, 50g or 80g(24k) refrigerant will be discharged in piping.(This must be
strictly controlled within 90
2-way valve
o
using
Outdoor unit
Max. Length:
A
Indoor unit
no more gas if the length of connecting pipe is less than 20m(18K 24K).
The height difference between any two indoor or outdoor units can not be
more than 10m(18K 24K).
o
and 10 sec.)
25
Gas side
Liquid side
3-way valve
Forced fastening without careful
centering may damage the
threads and cause a leakage of
gas.
Pipe Diameter (
Liquid Side 6.35mm(1/4")
Gas Side 15.88mm(1/2")
Liquid Side 9.52mm(3/8")
Gas Side 15.88mm(5/ 8")
for 18K 24K: A=20m
Oil trap
CAUTION
In case more than 5m
Oil trap shoud be installed every 5~7m
Gas side
Liquid side
2-way valve
3-way valve
Fastening Torque
)
18N.m
50N.m
42N.m
60N.m