13
Installation Procedure
English
Step 8 Performing the gas leak test
To identify potential gas leaks on the indoor unit, inspect
the connection area of each refrigerant pipe using a leak
detector for R-410A.
Before recreating the vacuum and recirculating the
refrigerant gas, pressurize the whole system with
nitrogen (using a cylinder with a pressure reducer) at a
pressure above 4 MPa in order to immediately detect
leaks on the refrigerant fittings.
Made vacuum for 15 minutes and pressurizing system
with nitrogen.
1 way Cassette
4 way Cassette
Liquid side
Gas side
Insulator
Step 9 Insulating the refrigerant pipes
Once you have checked that there are no leaks in the
system, you can insulate the piping and hose.
1 To avoid condensation problems, place Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
NOTE
ŷ Always make the seam of pipes face upwards.
2 Wind insulating tape around the pipes and drain hose
avoiding compressing the insulation too much.
Insulation cover pipe
Insulation pipe
Be sure to overlap the insulation.
Indoor unit
CAUTION
ŷ Be sure to wrap insulation tightly without any gaps.
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 The pipes and electrical cables connecting the indoor
unit with the outdoor unit must be fixed to the wall
with suitable ducts.
CAUTION
ŷ Make sure that all refrigerant connection must be
accessible for easy maintenance and detachment.
ŷ Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
ŷ Wind the refrigerant pipe with insulation tape if it is
exposed to outside sunlight.
ŷ Install the refrigerant pipe respecting that the
insulation does not get thinner on the bent part or
hanger of pipe.
ŷ Add the additional insulation if the insulation plate
gets thinner.
a x 3
Hanger
Additional insulation
a
Refrigerant pipe
insulation
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