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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 0.2 MPa, less than 4 MPa (gauge) in order
to immediately detect leaks on the refrigerant fittings.
Made vacuum for 15 minutes and pressurizing system
with nitrogen.
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.
No gap
NBR
NOTE
• Always make the seam of pipes face upwards.
CAUTION
• The insulation has to be produced in full compliance
with European regulation EEC / EU 2037 / 2000
requiring the use of sheaths insulation without using
CFC and HCFC gases for health and the environment.
2 Wind insulating tape around the pipes and drain hose
• Be sure to wrap insulation tightly without any gaps.
Liquid side
3 Finish wrapping insulating tape around the rest of the
Gas side
4 The pipes and electrical cables connecting the indoor
• Must fit tightly against body without any gap.
• Make sure that all refrigerant connection must be
• Install the insulation not to get wider and use the
• Wind the refrigerant pipe with insulation tape if it is
• Install the refrigerant pipe respecting that the insulation
• Add the additional insulation if the insulation plate gets
avoiding compressing the insulation too much.
Insulation cover pipe
Insulation pipe
Indoor unit
Be sure to overlap the insulation.
CAUTION
pipes leading to the outdoor unit.
unit with the outdoor unit must be fixed to the wall
with suitable ducts.
CAUTION
accessible for easy maintenance and detachment.
adhesives on the connection part of it to prevent moisture
from entering.
exposed to outside sunlight.
does not get thinner on the bent part or hanger of pipe.
thinner.
Additional insulation
a
a x 3
Hanger
Refrigerant pipe
insulation
11
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