1-12-1-1-14
1
7. LEAK TEST AND EVACUATION
Leak Tightness Test Method
Keep 3-way valve fully closed and pressurize through 3-way valve service port.
Do not pressurize to the default value at once. Pressurize gradually.
(1) Pressurize to 0.5MPa {5 k
g
f/cm²G} and then leave it for 5 minutes to ensure that
the pressure does not drop.
(2) Pressurize to 1.5MPa {15 k
g
f/cm²G} and leave it for 5 minutes to ensure that the
pressure does not drop.
(3) For the test, pressurize to 4.15MPa and leave it for about 1 day to ensure that the
pressure does not drop.
EVACUATION
Use a vacuum pump (with bac
k-fl
ow prevention device) to vacuum through the 3-way
valve service port to achieve the pressure below -101kPa {–755 mmHg, 5 Torr}.
Air and moisture remaining in the refrigerant system due to poor vacuum drying can
cause performance decrement and malfunction of the compressor.
8. REGARDING REFRIGERANT FILLING
Precautions during refriger
ant filling
Ensure to fill only with liquid ref
riger
ant when refilling.
If gas refriger
ant is filled, the ref
rigerant composition will not be
balanced and will cause abnormal operation.
Liquid ref
rigerant
Siphon tube
Cylinder with
a siphon tube
If using cylinders as shown in the bottom left diagram; without a siphon tube
inside, turn it upside down and use it.
(It is recommended to use the manifold with the side glass.)
Liquid ref
rigerant
Gas refrigerant
Cylinder
Cylinder
Possible
Not possible
Use tools that are designed specifically
for R32, for pressure resistance and to prevent mixing impurities.
Fill the refrigerant from the 3-way valve’s service por
t on the liquid tub
e.
F
or filling and replacing all ref
rigerant (F
or refilling due to a leak)
F
or refilling ref
riger
ant, first collect all residual ref
rigerant and after vacuum dehydration using the vacuum pump.
Refill the ref
rigerant according to the
prescr
ibed amount stated on the placard affi
xed to this unit.
Precautions after the tubes’ connection have completed
Ensure to open the 3-way valve after completing the tubing installation, leak test and vacuuming. If it is closed during operation, it can lead to compressor failure.
Charging with refrigerant
* For single combination
At the time of shipment from the factory, this unit is charged with enough refrigerant f
or an equi
valent tube length of 30m.
If the equi
valent tube length used will
be 30m or less, no additional charging will be necessary.
If the equi
valent tube length will be between 30 and 50/85m, charge with additional refriger
ant according to the equi
valent length given in the table below.
Pump down operation
Please see Section 2 “2-12. Caution for Pump Down” on page 2-15.
It is also indicated on the label affixed to the outdoor unit.
R3
2
Use nitrogen gas for the leak tightness test.
Using flamma
ble gas can cause an explosion.
Nitrogen
Refrigerant
meter
Pressure
meter
Outdoor unit
Indoor unit
3-way
valve
Vacuum
pump
For other combinations: Please refer to “9. TWIN, TRIPLE AND DOUBLE TWIN TYPE CONNECTIONS”
Additional charging amount
Equi
valent length
Minimum length
U-200PZH2E8
60
g
/m
90 m
5 m
U-250PZH2E8
80
g
/m
60 m
5 m
SM830276-00_欧州向け R32シングル TD＆SM.indb 14
2019/02/27 11:54:29
Summary of Contents for Elite Big PAC-i S-200PE3E5B
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