Detecting Leaks; Repairing Leaks; Warranty Policy - Panasonic PAW-160MAH2L Installation Instructions Manual

1.4.3 Detecting leaks

● If a leak is suspected, remove or extinguish all naked fl ames and ventilate the
space immediately.
● To search for and detect any refrigerant leaks, never use potential sources of igniti-
on like e.g. a halide torch or any other detector using a naked fl ame.
● Leak detection fl uids are suitable for use with most refrigerants, but the use of
detergents containing chlorine shall be avoided, as the chlorine may react with the
refrigerant and corrode the copper pipework.
● Preferably, use an electronic leak dectector, which is suitable for R32, to check for
leaks.
● Make sure that the electronic detector has an adequate sensitivity and that it has
been calibrated in a refi rgerant-free area.
● Set the leak detector to a percentage of the lower fl ammable limit (LFL) of the rele-
vant refrigerant, and calibrate the detector to the refrigerant used (R32) so that the
appropriate percentage of refrigerant gas (max. 25 %) is confi rmed.

1.4.4 Repairing leaks

If a leakage of refrigerant is found, which requires brazing, do the following:
● Recover all refrigerant from the system, or isolate all refrigerant by means of shut-
off valves in a part of the system remote from the leak.
● Purge the system with oxygen-free nitrogen (OFN) both, before and during the
brazing process.
● Re-fi ll the system with refrigerant and check for any remaining leaks (see
→ 1.4.3 Detecting leaks).
● Repeat this procedure until no more leaks are detected.
1.5

Warranty policy

We can be held responsible for the quality and performance of the AHU Kit we supply.
However, we cannot be held responsible for the performances, operations and machine controls
of your complete AHU system which incorporates our AHU Kit, nor for the components used in
the refrigerant cycle of your AHU system (including, but not limited to, compressors, high-pres-
sure switches, check valves, strainers, expansion valves, solenoid valves, 4-way valves, capil-
lary tubes, accumulator tanks, and heat exchanger tubes), nor for any damages and defects
caused in the process of installing our AHU Kit, by the system design and/or during assembly of
your AHU system.
We do not publish the certifi cate to show conformity to the EMC and the product safety require-
ments applicable to your complete AHU system.
General information and safety instructions
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