Cover the pipe before connecting to keep rubbish, dust or other
impurities out.
10. REFRIGERANT PIPE
Gas side
Piping
Capaticyl(kW)
Piping material
Copper special for air conditioner
12.5/14/20/25/28
Φ16mm
Φ9.52mm
Liquid side
Table.10-1
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ķ
ĸ
Ĺ
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Be sure to use two wrenches simultaneously when you connect
or disconnect the pipes.
The stop valve of the outdoor unit should be closed absolutely
(as original state). Every time you connect it, first loosen the nuts
at the part of stop valve, then connect the flare pipe immediately
(in 5 minutes). If the nuts have been loosened for a long time,
dusts and other impurities may enter the pipe system and may
cause malfunction later. So please expel the air out of the pipe
with refrigerant before connection.
The throttling components of Model 125, 140 are built in, when the
throttling components built in dismountable formaintenance, please
open the piping maintaining cover panel directly, anduse two
spanners to twist the copper nuts then can take out the throttling-
components, pay attention to avoid bending the pipe at the same
time; after change new throttling components, make sure that the
connectors areconnected reliably and tightly.
The throttling components of Model 200, 250, and 280 are built
external, can directly change throttling components.
8. THROTTING COMPONENTS MAAINTENANCE
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Check whether the height drop between the indoor unit and
outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
The max height drop and The length of refrigerant pipe deponding
on the ouotdoor unit.(If the height drop is more than 10m, you
had better put the outdoor unit over above the indoor unit.)
The number bends fewer than 15.
Do not let air, dust, or other impurities fall in the pipe system
during the time of installation.
The connecting pipe should not be installed until the indoor and
outdoor units have been fixed already.
Keep the connecting pipe dry, and do not let moisture in
during installation.
The Procedure of Connecting Pipes
Measure the necessary length of the connecting pipe, and make
it by the following way.
Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Don,t harm them.
Daub the surfaces of the flare pipe and the joint nuts with frozen
oil, and wrench it for 3~4rounds with hands before fasten the
flare nuts. (Refer to
Fig.11-1
)
11. INSTALL THE CONNECTING PIPE
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9. CONNECTION CONDITION
The total connected capacity of the standard indoor units and fresh
air treatment units must be between 50% and 100% of the capacity
of the air conditioning outdoor units. the connected capacity of the
fresh air treatment units must not exceed 30% of the capacity of the
air conditioning outdoor units.
Then fresh air treatment unit can also be used exclusively. the
connected capacity of the fresh air treatment unit must bebetween
50% and 100% of the capacity of the air conditioning outdoor unit.
Total connected capacity of standard indoor units and fresh air
treatment unit does not exceed 100%. system capacity of 20 HP =
indoor unit capacity of 20 HP.
Connected capacity of fresh air treatment unit does not exceed
30% of this since system capacity of 20 HP x 0.3 = 6 HP > fresh air treat-
ment unit capacity = 5 HP
System example: check that system connected capacity
is within the appropriate range.
5HP
fresh air
treatment unit
5HP
indoor unit *3
5HP
5HP
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Expel the air (refer to the “Expel The Air”) after connecting the
refrigerant pipe with the indoor unit and the outdoor unit.Then
fasten the nuts at the repair-points.
Notices For Benable pipe.
The bending angle should not exceed 90
ć
Bending position is preferably in the bendable pipe. The larger
the better it is .
Do not bend the pipe more than three times.
Bend the connecting pipe of small wall thickness.
Cut out a desired concave at the bending part of the insulating
pipe.
Then expose the pipe(cover it with tapes after bending).
To prevent collapsing of deforming, please bend the pipe at its
biggest radius.
Use bender to get a small radius pipes.
Use the market brass pipe.
Be sure to use the same insulating materials when you buy the
brass pipe. (More than 9mm thick)
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maintenance of motor
˖
0 1 2
F
3
E
4
D
5
C
6
B
7
A
89
0 1 2
F
3
E
4
D
5
C
6
B
7
A
89
Installation manual
12
Duct 100% fresh air
