Table of Contents
Advertisement
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.
The refrigerant charge of the system must be less than
100 kg. This means that in case the calculated refrigerant
charge is equal to or more than 95 kg you must divide your
multiple outdoor system into smaller independent systems,
each containing less than 95 kg refrigerant charge.
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
(2)
In case of multiple outdoor systems, only 1 label must be adhered,
mentioning the total factory refrigerant charge of all outdoor units
connected on the refrigerant system.
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.
Installation manual
15
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
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.
■
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
installation conditions" on page 14
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
(2)
Liquid line stop valve
Gas line stop valve
(a) The model RXYCQ14 supports field piping of Ø12.7 on the accessory pipe
supplied with the unit.
(b) The model RXYCQ20 supports field piping of Ø15.9 on the accessory pipe
supplied with the unit.
(c) The model RXYCQ12 supports field piping of Ø22.2 on the accessory pipe
supplied with the unit.
The model RXYCQ14~20 supports field piping of Ø28.6 on the accessory pipe
supplied with the unit.
Opening stop valve
5
1.
Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2.
Turn it until the shaft stops.
To fully open the Ø19.1 or Ø25.4 gas line stop valve, turn the
hexagonal wrench until a torque between 27 and 33 N•m is
achieved.
Inadequate torque may cause leakage of refrigerant and
breakage of the stop valve cap.
Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
steps
of
"10. Checking
8
10
12
14
(a)
Ø9.5
Ø15.9 Ø19.1
1
2
1
Service port
2
Cap
3
Hexagon hole
4
Shaft
5
Seal
4
3
VRV Classic System air conditioner
of
unit
and
are completed. If
16
18
20
(b)
Ø12.7
(c)
Ø25.4
RXYCQ8~20A7Y1B
4P327528-1 – 2012.08
Hide quick links:
Advertisement
Table of Contents
