20
AA
Performing leak tests
The designs and shape are subject to
change according to the model.
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.
Once you have completed all the connections, check for possible leaks using
leak detector specifically designed for HFC refrigerants.
To check for gas leaks on the...
Then, using a leak detector, check the...
Outdoor unit
Valves on sections A and B.
Connecting the drain hose to the outdoor unit
50mm
‘B’mm
13mm
When using the air conditioner in the heating mode, ice may accumulate . During de-icing (defrost operation), the
condensed water must be drained off safely. Consequently, you must install a drain hose on the outdoor unit,
following the instructions below.
1. Make space more than 50mm between the bottom of the outdoor unit and the ground for installation of the drain hose,
as shown in figure.
2. Insert the drain plug into the hole on the underside of the outdoor unit.
3. Connect the drain hose to the drain plug.
4. Ensure that the drained water runs off correctly and safely.
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 an insulator around each
refrigerant pipe.
NBR(T13.0 or thicker)
• When insulate the pipe, be sure to overlap the insulation.
• You have to use more than 120°C insulation(T13.0 or thicker Acrylonitrile
Butadien Rubber) for the gas refrigerant pipe.
• The insulation has to be produced in full compliance of European regulation
reg. EEC / EU 2037/ 2000 that requires the use of sheaths insulation form
without using CFC and HCFC gases for health and the environment.
• When insulating the pipe, use non-slit insulator.
5. Be sure to plug the rest of drain holes not connected with drain plugs using drain caps.
DRAIN CAP(3EA)
DRAIN PLUG(1EA)
A(Gas)
B(Liquid)
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2011-03-09 오후 9:32:42
