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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,
the factory refrigerant charge of the product,
the additional refrigerant amount charged in the field and
+
the total refrigerant charge
on the refrigerant charge label supplied with the product.
The filled out label must be adhered in the proximity of the product
charging port (e.g. onto the inside of the service cover).
6
5
Charging additional refrigerant
When performing service on the unit requiring the
refrigerant system to be opened, refrigerant must be
evacuated according to local regulations.
If the total length of piping for all rooms exceeds the figure listed
below, additionally charge with 20 g of refrigerant (R410A) for each
additional meter of piping.
Total length of piping for all rooms
Determine the weight of refrigerant to be charged additionally and fill
in the amount in the service sticker on the rear side of the service
cover.
CAUTION
Even though the stop valve is fully closed, the refrigerant
may slowly leak out; do not leave the flare nut removed for
a long period of time.
Refrigerant piping work
Cautions on pipe handling
Protect the open end of the pipe against dust and moisture.
All pipe bends should be as gentle as possible. Use a pipe
bender for bending.
Bending radius should be 30 to 40 mm or larger.
4AMX80E7V3B
R410A Split series
4PW38479-1A
1
factory refrigerant charge
4
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
4AMX80
30 m
Selection of copper and heat insulation materials
When using commercial copper pipes and fittings, observe the
following:
Insulation material: polyethylene foam
Heat transfer rate: 0.041 to 0.052 W/mK (0.035 to 0.045 kcal/
mh°C)
Refrigerant gas pipe's surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this
temperature.
Be sure to insulate both the gas and liquid piping and to provide
insulation dimensions as below.
Pipe size
Thickness
O.D. (mm)
(mm)
6.4
9.5
0.8
12.7
15.9
1.0
1
Gas pipe
2
Inter-unit wiring
3
Liquid pipe
4
Liquid pipe insulation
5
Drain hose
6
Finishing tape
7
Gas pipe insulation
Use separate thermal insulation pipes for gas and liquid
refrigerant pipes.
Flaring the pipe end
1
Cut the pipe end with a pipe cutter.
2
Remove burrs with the cut surface facing downward so that the
chips do not enter the pipe.
1
Cut exactly at right angles.
2
Remove burrs.
3
Put the flare nut on the pipe.
4
Flare the pipe.
Flare tool for R410A
Clutch type
A
0~0.5 mm
Set exactly at the position shown above.
5
Check that the flaring is properly made.
1
1
Flare's inner surface must be flaw-free.
2
The pipe end must be evenly flared in a perfect circle.
3
Make sure that the flare nut is fitted.
Pipe insulation
Thickness
I.D. (mm)
(mm)
≥10
8-10
12-15
≥13
16-20
2
1
7
6
1
A
Conventional flare tool
Clutch type
Wing nut type
("Ridgid")
("Imperial")
1.0~1.5 mm
1.5~2.0 mm
2
3
Installation manual
3
4
5
2
6
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