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Outdoor Unit Installation
5.
Refilling the refrigerant.
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operation.
1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like "liquid filling siphon
attached" displayed on it.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when
filling.
• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.
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.
6.
Refrigerant piping work.
6-1 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.
6-2 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.
Gas side
O.D. 12.7mm
Minimum bend radius
40mm or more
Thickness 0.8mm (C1220T-O)
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
7
There is a siphon pipe inside, so the
cylinder need not be upside-down to
fill with liquid.
(1)
GWP = global warming potential
Liquid side
O.D. 6.4mm
30mm or more
Filling other cylinders
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
Gas pipe
Liquid pipe
thermal insulation
thermal insulation
I.D. 14-16mm
I.D. 8-10mm
Thickness 10mm Min.
Turn the cylinder upside-down
when filling.
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.
Rain
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Gas pipe
Gas pipe
insulation
Finishing tape
Wall
Inter-unit wiring
Liquid pipe
Liquid pipe
insulation
Drain hose
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