Step 8 Performing The Gas Leak Test; Step 9 Insulating The Refrigerant Pipes - Samsung AM RN4 CH Series Installation Manual

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
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
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
requring the use of sheaths insulation without using
CFC and HCFC gases for heating and the environment.
2 Wind insulating tape around the pipes and drain hose
avoiding compressing the insulation too much.
Indoor unit
• Be sure to wrap insulation tightly without any gaps.
3 Finish wrapping insulating tape around the rest of the
Liquid side Liquid side
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
Gas side Gas side
with suitable ducts.
• Must fit tightly against body without any gap.
• Make sure that all refrigerant connection must be
accessible for easy maintenance and detachment.
• Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
• Wind the refrigerant pipe with insulation tape if it is
exposed to outside sunlight.
• Install the refrigerant pipe respecting that the insulation
does not get thinner on the bent part or hanger of pipe.
• Add the additional insulation if the insulation plate
gets thinner.
Insulation cover pipe
Insulation cover pipe
Insulation pipe
Insulation pipe
Indoor unit
Be sure to overlap the insulation. Be sure to overlap the insulation.
CAUTION
CAUTION
Hanger
Hanger
Additional insulation
Additional insulation
a
a x 3
Refrigerant pipe Refrigerant pipe
insulation
insulation
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