7
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English
Outdoor Unit Installation
7.
Refrigerant piping work.
7-1 Cautions on pipe handling.
1)Protect the open end of the pipe against dust and moisture.
2)All pipe bends should be as gentle as possible. Use a pipe bender
for bending.
(Bending radius should be 30 to 40mm or larger.)
7-2 Selection of copper and heat insulation materials.
When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/mh°C)
Refrigerant gas pipe’s surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Gas side
Liquid side
Gas pipe thermal
insulation
Liquid pipe thermal
insulation
O.D. 9.5mm
O.D. 6.4mm
I.D. 12-15mm
I.D. 8-10mm
Thickness 0.8mm
Thickness 10mm Min.
3
5
6
2
1
4
Please fill in with indelible ink,
n
1
the factory refrigerant charge of the product,
n
2
the additional refrigerant amount charged in the field and
n
1 + 2
the total refrigerant charge
on the refrigerant charge label supplied with the product.
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
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
The filled out label must be adhered in the
proximity of the product charging port (e.g.
onto the inside of the stop valve cover).
Wall
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
Be sure to
place a cap.
Rain
Piping bundle diagram
Finishing tape
Liquid pipe insulation
Inter-unit wiring
Gas pipe
insulation
Gas pipe
Humidifying
hose
C
Drain hose
Liquid pipe
Seal the edge of the
insulation if there is a
possibility that the
condensation from the
shut-off valve might
drip onto the indoor
unit through the gap
between the insulation
and the pipe.
01_EN_3P190651-2C.fm Page 7 Tuesday, March 13, 2007 4:35 PM
