Mitsubishi Electric ECOV-X37VA Manuel D'installation page 39

9-3. Insulating
• Insulating must be done after air tightness test.
• The liquid pipe and suction pipe must be insulated. Refer to the table below.
Use foamed polyurethane and styrol with no hygroscopicity for insulation.
Pipe
Suction pipe
Liquid pipe
* Calculate the thickness of the insulation with 0°C as the cold storage refrigerant temperature for suc-
tion pipe and -30°C for freezer storage refrigerant temperature, and 0°C for liquid pipe.
Suction pipe (gas pipe)
Insulation a
Prohibition of heat exchange between the suction pipe and the liquid pipe
• Do not exchange heat between the suction pipe and the liquid pipe.
• Hot gas pipe is always high temperature. Insulate pipes if they are installed in a place accessible to people. Use insulation
that is rated for temperatures of at least 150°C, such as insulation tubes or glass wool insulation.
Insulation Cold storage
Thickness of insulation
(recommended)
a Pit piping
Ceiling piping
b
Liquid pipe Suction pipe
Liquid pipe
Insulation
Insulation b
39
Freezer storage
Thickness of insulation
(recommended)
25 or more Pit piping
50 or more Pit piping
20 or more
(Unit: mm)
50 or more
75 or more
WT09614X03_GB