Daikin VRVIII RXYQ10P7W1BR1, Installation Manual

Page: 21 / 32

RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1E – 07.2010
Installation manual
16
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.
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
GWP
(1)
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).
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.
■
Be sure to use tools exclusively for R410A to ensure required
pressure resistance and to prevent foreign materials from mixing
into the system.
11.3. Stop valve operation procedure
Size of stop valve
The sizes of the stop valves connected to the system are as listed in
the table below.
Opening stop valve (See figure 15)
1. Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2. Turn it until the shaft stops.
3. Make sure to tighten the cap securely. Refer to the table below
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.
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.
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 additional multilingual fluorinated
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of
that label.
Charge the liquid
refrigerant with the
cylinder in upright
position. Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
3
5 6
2
1
4
1 factory refrigerant
charge of the product:
see unit name plate
2 additional refrigerant
amount charged in the
field
3 total refrigerant
charge
4 Contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5 outdoor unit
6 refrigerant cylinder
and manifold for
charging
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.
■
Do not open the stop valve until all piping and
electrical steps of
"10. Checking of unit and
installation conditions" on page 15 are completed. If
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.
Type 5 8 10 12 14 16 18
Liquid line stop valve
Ø9.5
(a)
(a) The model RXYQ12 supports field piping of Ø12.7 on the accessory pipe
supplied with the unit.
Ø12.7
(b)
(b) The model RXYQ18 supports field piping of Ø15.9 on the accessory pipe
supplied with the unit.
Gas line stop valve Ø15.9 Ø19.1
Ø25.4
(c)
(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.
1 Service port
2 Cap
3 Hexagon hole
4 Shaft
5 Seal
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.
Stop valve size
Tightening torque N•m (Turn clockwise to close)
Shaft
Cap (valve lid) Service port Valve body
Hexagonal
wrench
Ø9.5 5.4~6.6
4 mm
13.5~16.5
11.5~13.9
Ø12.7 8.1~9.9 18.0~22.0
Ø15.9 13.5~16.5 6 mm 23.0~27.0
Ø19.1
27.0~33.0 8 mm 22.5~27.5
Ø25.4