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Never use the refrigerant charged in the outdoor unit for air purging.
Insufficient refrigerant will lead to failure.
Thermal Insulation Finishing Work
Wrap tape around the thermal
insulation of gas pipe and liquid
pipe.
Gas Line
Liquid Line
Liquid Line Stop Valve
Gas Line Stop Valve
Cover the liquid line
with thermal insulation.
Nitrogen Tank
for Air Tight Test
and
Nitrogen Blow
during Brazing
Vacuum Pump
Manifold
Gauge
Cover the flare nut and union of the
piping connection with thermal insulation.
Insulate the liquid pipe for
prevention of the capacity
decrease according to the
ambient air conditions and
the dewing on the pipe surface
by the low pressure.
Check to ensure that there is
no gas leakage. When large
amount of the refrigerant leaks,
the troubles as follows may occur;
1. Oxygen Deficiency
2. Generation of Harmful Gas
Due to Chemical Reaction
with Fire.
Indoor Unit
15
●
●
●
At the test run, fully open the spindle.
If not fully opened, the devices will be damaged.
An excess or a shortage of refrigerant is the main
cause of damages to the units.
Charge the correct refrigerant quantity according
to the description of label at the inside of service
cover.
Check for refrigerant leakage in detail. If a large
refrigerant leakage occurs, it will cause difficulty
with breathing or harmful gases would occur if a
fire was being used in the room.
NOTE:
(ft
3
(m
3
))
*
his value should be decided according to each country’s regulation such as 3 and
t . In the case that the calculated critical concentration is higher than t l, take the folloing
actions:
Critical Concentration lbft
3
(kg/m
3
)
1)
Provide a gas leakage detector and exhaust fan controlled by its gas leakage detector.
2)
Provide effective opening the wall or door for ventilation to next door so that the critical gas concentration
be maintained lower than the above value. (Provide an opening than 0.15% of
floor surface at the lower part of a door.)
●
Special Attention Regarding Refrigerant Gas Leakage
Pay attention to the critical gas concentration to avoid accidental refrigerant gas leakage before installing
air conditioning systems.
≤
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