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11. C
HARGING REFRIGERANT
The outdoor unit is factory charged, but depending on the length of
the piping when installed, the outdoor unit may require additional
charging.
For charging the additional refrigerant follow the procedure as
described in this chapter.
Refrigerant can not be charged until all field wiring and
field piping has been completed.
Refrigerant may only be charged after performing the leak
test and the vacuum drying.
For factory charge, refer to the unit name plate.
11.1. Important information regarding the
refrigerant used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
R410A
(1)
GWP
value:
1975
(1)
GWP = global warming potential
Please fill in with indelible ink,
■
➀ the factory refrigerant charge of the product,
■
➁ the additional refrigerant amount charged in the field and
■
➀+➁ the total refrigerant charge
on the fluorinated greenhouse gases label supplied with the product.
The filled out label must be adhered on the inside of the product and
in the proximity of the product charging port (e.g. on the inside of the
service cover).
6
5
NOTE
National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide
the appropriate official national language on the unit.
Therefore,
an
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of
that label.
11.2. Precautions when adding R410A
Be sure to charge the specified amount of refrigerant in liquid state to
the liquid pipe.
Since this refrigerant is a mixed refrigerant, adding it in gas form may cause
the refrigerant composition to change, preventing normal operation.
■
Before charging, check whether the refrigerant cylinder is
equipped with a siphon tube or not.
Charge the liquid
refrigerant with the
cylinder in upright
position.
RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1E – 07.2010
1
factory refrigerant
4
charge of the product:
see unit name plate
1
2
additional refrigerant
amount charged in the
2
field
3
total refrigerant
charge
3
4
Contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5
outdoor unit
6
refrigerant cylinder
and manifold for
charging
additional
multilingual
fluorinated
Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
■
Be sure to use tools exclusively for R410A to ensure required
pressure resistance and to prevent foreign materials from mixing
into the system.
Charging with an unsuitable substance may cause
explosions and accidents, so always make sure that the
appropriate refrigerant (R410A) is charged.
Refrigerant containers must be opened slowly.
11.3. Stop valve operation procedure
■
Do not open the stop valve until all piping and
electrical
steps
installation conditions" on page 15
the stop valve is left open without turning on the
power, it may cause refrigerant to build up in the
compressor, leading to insulation degradation.
■
Always use a charge hose for service port connection.
■
After tightening the cap, check that no refrigerant
leaks are present.
Size of stop valve
The sizes of the stop valves connected to the system are as listed in
the table below.
Type
5
Liquid line stop valve
Gas line stop valve
Ø15.9 Ø19.1
(a) The model RXYQ12 supports field piping of Ø12.7 on the accessory pipe
supplied with the unit.
(b) The model RXYQ18 supports field piping of Ø15.9 on the accessory pipe
supplied with the unit.
(c) The model RXYQ10 supports field piping of Ø22.2 on the accessory pipe
supplied with the unit.
The model RXYQ12~18 supports field piping of Ø28.6 on the accessory pipe
supplied with the unit.
Opening stop valve
(See figure 15)
1
Service port
2
Cap
3
Hexagon hole
4
Shaft
5
Seal
1.
Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2.
Turn it until the shaft stops.
Do not apply excessive force to the stop valve. Doing
so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3.
Make sure to tighten the cap securely. Refer to the table below
Tightening torque N•m (Turn clockwise to close)
Shaft
Stop valve size
Valve body
Ø9.5
5.4~6.6
Ø12.7
8.1~9.9
Ø15.9
13.5~16.5
Ø19.1
27.0~33.0
Ø25.4
Closing stop valve
(See figure 15)
1.
Remove the cap and turn the valve clockwise with the hexagon
wrench.
2.
Securely tighten the valve until the shaft contacts the main body
seal.
3.
Make sure to tighten the cap securely.
For the tightening torque, refer to the table above.
of
"10. Checking
of
unit
are completed. If
8
10
12
14
16
(a)
Ø9.5
Ø12.7
(c)
Ø25.4
Hexagonal
wrench
Cap (valve lid)
Service port
13.5~16.5
4 mm
18.0~22.0
6 mm
23.0~27.0
11.5~13.9
8 mm
22.5~27.5
Installation manual
and
18
(b)
16
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