7
Installation Manual
After the pipes between the indoor unit and the outdoor unit are
connected, replenish compressed nitrogen to perform airtight
test.
The airtight test is performed by using the compressed nitrogen
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Tighten the spool of the gas valve and liquid valve before
compressing the nitrogen.
Compress the nitrogen at the air vent of the gas valve.
The gas valve and liquid valve are closed in the process of
compressing the nitrogen.
Do not use oxygen, flammable gas or toxic gas in the airtight
test.
Use a vacuum pump to make a vacuum. Do not use refrigerant
gas to expel air.
When making the vacuum, start from the air side.
According to the diameter and length of the connective liquid-
side pipe of the outdoor unit and indoor unit, calculate the
refrigerant replenishment quantity. The refrigerant for replenish-
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Trash and foreign matters may come into the pipe in the process
of installing the refrigerant pipe. Be sure to blow them off with
nitrogen before connecting the pipe to the outdoor units.
Use high-pressure nitrogen to clean the pipelines. Do not use
the refrigerant of the outdoor unit for cleaning.
NOTE
Table.4-3
9.52
I
Diameter of liquid-side pipe
0.060kg
Quantity of refrigerant
replenished for 1 m pipe length
Fig.4-10
Signal wire
Gas-side connective pipe of system
Liquid-side connective pipe of system
4.7 Airtight Test
4.8 Use A Vacuum Pump To Create A Vacuum
4.9 Open All Valves
Refrigerant Replenishment Quantity
4.11 Remove Trash And Moist In The Pipe
4.12 Schematic Diagram Of Connection
Between Indoor Unit And Outdoor Unit
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refrigerant which is harmless and non-flammable. The room for
placing the air conditioner should have a proper space. Even if
refrigerant leakage occurs, the density threshold will not be
crossed. Additional measures may also be taken.
Density threshold: Density of the Freon gas that does not harm
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Calculate the total quantity of refrigerant to be replenished (A
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-
ment quantity upon shipment (11[kg]) + additional refrigerant
replenishment corresponding to the pipe length
Calculate out the indoor volume (B[m
3
]) (according to the
minimum volume)
Calculate out the refrigerant density:
Measures against crossing of the refrigerant density threshold
In order to keep the refrigerant density below the threshold
value, please install a mechanic ventilation device. (perform
ventilation often)
In case frequent ventilation is impossible, please install the
leakage detection alarm device linked with the mechanical
ventilation device.
Fig.4-12
A[kg]
B[m ]
3
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3
Outdoor unit
Room in which refrigerant is leaked
(All refrigerant is leaked)
4.13 Refrigerant Leak Precautions
Fig.4-11
Signal wire
Gas-side connective pipe of system
Liquid-side connective pipe of system
