Haier HPU-24C03 User Manual - Page 26

Purging Method

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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 90o 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. Liquid side Gas side 2-way valve 3-way valve Liquid side Gas side NN  NN  2-way valve 3-way valve Forced fastening without careful centering may damage the threads and cause a leakage of gas. Pipe Diameter ( ) Fastening Torque Liquid Side 6.35mm(1/4") Gas Side 15.88mm(1/2") Liquid Side 9.52mm(3/8") Gas Side 15.88mm(5/ 8") 18N.m 50N.m 42N.m 60N.m Outdoor unit Max. Length: for 18K 24K: A=20m Outdoor unit A Oil trap Indoor unit Max.Elevation: for 18K 24K: 10m CAUTION In case more than 5m Indoor unit Oil trap shoud be installed every 5~7m 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). 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 90o and 10 sec.) 25

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25
Installation Manual of Room Air Conditioner
1. Piping connection of the outdoor unit
C
onnecting the connecting pipe and inlet and outlet li
q
ued pipe
according to the piping method.
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
o
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.
Pipe
D
iameter (
)
F
astening
T
or
q
ue
L
i
q
uid
S
ide 6.35mm(1/4")
G
as
S
ide 15.88mm(1/2")
50
N
.m
18
N
.m
F
orced fastening
w
ithout careful
centering ma
y
damage the
threads and cause a lea
k
age of
gas.
L
i
q
uid
S
ide 9.52mm(3/8")
G
as
S
ide 15.88mm(5/ 8")
60
N
.m
42
N
.m
2
-w
a
yv
al
v
e
3
-w
a
yv
al
v
e
L
i
q
uid side
G
as side
L
i
q
uid side
G
as side
2
-w
a
yv
al
v
e
3
-w
a
yv
al
v
e
N
ote: When e
x
tending piping
,
air inside piping shall be remo
v
ed
b
y
using e
x
ternal refrigerant gas
,
charge according to the follo
w
ing list.
B
rand ne
w
outdoor unit is charged 50g or 80g(24
k
) more refrigerant than regulated
w
eight. Onl
y
for
first installation
,
this e
x
tra 50g or 80g(24
k
) can be used to purge airin pipes.
D
uring this procedure
,
50g or 80g(24
k
) refrigerant
w
ill be discharged in piping.(
T
his must be
strictl
y
controlled
w
ithin 90
o
and 10 sec.)
CAUTI
O
N
I
n case more than 5m
Oil trap shoud be installed e
v
er
y
5~7m
Ma
x
.
L
ength:
for 18K 24K:
A
=20m
Ma
x
.
E
le
v
ation:
for 18K 24K: 10m
no more gas if the length of connecting pipe is less than
20m(18K 24K).
T
he height difference bet
w
een an
y
t
w
o indoor or outdoor units can not be
more than 10m(18K 24K).
A
Outdoor unit
I
ndoor unit
Outdoor unit
I
ndoor unit
Oil trap
2.
T
he connecting method of
U-
model terminal bloc
k
:
R
elease the scre
w
s
,
put the connecting
w
ire
'
s
U-
model terminal bloc
k
bet
w
een the scre
w
and
terminal
-
bloc
k
B
ase
,
then tighten the scre
w
s.
D
ra
w
the
w
ire lightl
y
to ma
k
e sure the bloc
k
ha
v
e
been compacted.