Refrigerant Piping Work - Daikin RXR28EV1B9 Installation Manual

Outdoor Unit Installation
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases covered by
the Kyoto Protocol. Do not vent gases into the atmosphere.
R410A
Refrigerant type:
(1) 1975
GWP value:
Please fill in with indelible ink,
the factory refrigerant charge of the product,
1
the additional refrigerant amount charged in the field and
2
the total refrigerant charge
1 + 2
on the refrigerant charge label supplied with the product.
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.
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.
Gas side
O.D. 9.5mm
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
7
(1)
GWP = global warming potential
Liquid side
O.D. 6.4mm
Thickness 0.8mm
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).
6 5
Rain
Piping bundle diagram
Finishing tape
Inter-unit wiring
Gas pipe
Gas pipe
insulation
C
Liquid pipe insulation Liquid pipe
Gas pipe thermal Liquid pipe thermal
insulation insulation
I.D. 12-15mm I.D. 8-10mm
Thickness 10mm Min.
1 factory refrigerant charge of the
product:
see unit name plate
2 additional refrigerant amount
charged in the field
4
3 total refrigerant charge
1
4 Contains fluorinated greenhouse
gases covered by the Kyoto
2 Protocol
5 outdoor unit
3 6 refrigerant cylinder and manifold
for charging
Be sure to
place a cap.
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
Drain hose
Humidifying
hose
■English
Wall