Leak Test - Samsung AM JNHF Series User Manual

Performing leak test & insulation

Leak test

◆ LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating the vacuum and recirculating the R410A, it's responsable
of installer to pressurize the whole system with nitrogen (using a cylinder with pressure reducer)
at a pressure above 40 bar (gauge).
◆ LEAK TEST WITH R410A (after opening valves)
Before opening valves, discharge all the nitrogen into the system and create vacuum. After opening valves check
leaks using a leak detector for refrigerant R410A.
• Discharge all the nitrogen to create a vacuum and charge the system.
CAUTION
Insulation
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 T13.0 or thicker Acrylonitrile Butadien Rubber separately around each refrigerant
pipe.
• A lways make the seam of pipes face upwards.
• The insulation has to be produced in full compliance of European
regulation reg. EEC / EU 2037/ 2000 that
CAUTION
requires the use of sheaths insulation form without using CFC and
HCFC gases for health and the environment.
2 Wind insulating tape around the pipes and drain hose avoiding to compress
the insulation too much.
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.
• A ll refrigerant connection must be accessible, in order to permit
either unit maintenance or removing it completely.
CAUTION
5 Select the insulation of the refrigerant pipe.
◆ Insulate the gas side and liquid side pipe referring to the thickness
according to the pipe size.
◆ Indoor temperature of 30°C and humidity of 85% is the stan dard condition.
If installing in a high humidity condition, use one grade thicker insulator by referring to the table below.
If installing in an unfavorable conditions, use thicker one.
◆ I nsulator's heat-resistance temperature should be more than 120°C.
Liquid refrigerant port
 The designs and shape are subject to
change according to the model.
CAUTION
G_1
Gas refrigerant port
No gap
NBR(T13.0 or thicker)
Insulation cover pipe
Insulation pipe
Indoor unit
Be sure to overlap
the insulation
• M ust fit tightly against
body without any gap.
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