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Idiomas disponibles
Idiomas disponibles
SPECIAL PRECAUTIONS WHEN DEALING WITH R410A UNIT
R410A is a new HFC refrigerant which does not damage the
ozone layer. The working pressure of this new refrigerant is
1.6 times higher than conventional refrigerant (R22), thus
proper installation/servicing is essential.
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Never use refrigerant other than R410A in an air
conditioner which designed to operate with R410A.
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Since R410A is a mixed refrigerant, any additional
refrigerant must be charged in liquid state for better
performance compared to in gas state.
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POE or PVE oil is used as lubricant for R410A
compressor, which is different from the mineral oil used
for R22 compressor. During installation or servicing, extra
precaution must betaken not to expose the R410A system
too long to moist air. Residual POE or PVE oil in the piping
and components can absorb moisture from the air.
Vacuuming is necessary to eliminate all moisture and air from the system.
Vacuuming The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged with
refrigerant, the indoor unit and the refrigerant connection
pipes must be air-purged because the air containing moisture
that remains in the refrigerant cycle may cause malfunction
of the compressor.
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Remove the caps from the valve and the service port.
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Connect the center of the charging gauge to the vacuum
pump.
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Connect the charging gauge to the service port of the
3-way valve.
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Start the vacuum pump. Evacuate for approximately
30 minutes. The evacuation time varies with different
vacuum pump capacity. Confi rm that the charging gauge
needle has moved towards -760mmHg.
Caution
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If the gauge needle does not move to -760mmHg, be sure
to check for gas leaks (using the refrigerant detector) at
fl are type connection of the indoor and outdoor unit and
repair the leak before proceeding to the next step.
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Close the valve of the changing gauge and stop the
vacuum pump.
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On the outdoor unit, open the suction valve (3 way) and
liquid valve (2 way) (in anti-clockwise direction) with
4mm key for hexagon sacked screw.
Charge Operation
This operation must be done by using a gas cylinder and a
precise weighing machine. The additional charge is topped-up
into the outdoor unit using the suction valve via the service
port.
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Remove the service port cap.
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Connect the low pressure side of the charging gauge to
the suction service port center of the cylinder tank and
close the high pressure side of the gauge. Purge the air
from the service hose.
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Start the air conditioner unit.
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Open the gas cylinder and low pressure charging valve.
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When the required refrigerant quantity is pumped into
the unit, close the low pressure side and the gas cylinder
valve.
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Disconnect the service hose from service port. Put back
the service port cap.
All manuals and user guides at all-guides.com
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VACUUMING AND CHARGING
1-15
To prevent mischarging, the diameter of the service port
on the fl are valve is different from that of R22.
Use tools and materials exclusively for refrigerant R410A.
Tools exclusively for R410A are manifold valve, charging
hose, pressure gauge, gas leak detector, fl are tools, torque
wrench, vacuum pump and refrigerant cylinder.
As an R410A air conditioner incurs higher pressure
than R22 units, it is essential to choose the copper pipes
correctly. Never use copper pipes thinner than 0.8mm even
though they are available in the market.
If the refrigerant gas leakage occurs during installation/
servicing, be sure to ventilate fully. If the refrigerant gas
comes into contact with fi re, a poisonous gas may occur.
When installing or removing an air conditioner, do not
allow air or moisture to remain in the refrigerant cycle.
Allen key
Flare nut
Service Port
Outdoor Unit 3 ways valve
LOW PRESSURE GAUGE
-760mmHg
HANDLE LO
CHARGE HOSE
LIQUID VALVE
GAS VALVE
(3-WAY)
LOW PRESSURE GAUGE
-760mmHg
HANDLE LO
CHARGE HOSE
LIQUID VALVE
GAS VALVE
(3-WAY)
Refrigerant Piping
HIGH PRESSURE GAUGE
GAUGE MANIFOLD
HANDLE HI (ALWAYS CLOSED)
CHARGE HOSE
VACUUM PUMP
ADAPTER FOR
COUNTER FLOW
PREVENTION
CHECK VALVE
CONFIGURATION OF AIR
PURGE BY CHARGING
HIGH PRESSURE GAUGE
GAUGE MANIFOLD
HANDLE HI (ALWAYS CLOSED)
CHARGE HOSE
CHECK VALVE
CONFIGURATION OF AIR
PURGE BY CHARGING
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