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DC Inverter U-match Series Floor Ceiling Type Unit
33
the use of detergents containing chlorine shall be avoided as the
chlorine may react with the refrigerant and corrode the copper
pipe-work.
If a leak is suspected, all naked flames shall be
removed/extinguished. If a leakage of refrigerant is found which
requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system
remote from the leak. Oxygen free nitrogen (OFN) shall then be purged
through the system both before and during the brazing process.
3.2.5 Refrigerant Adding
NOTICE
Before and during operation, use an appropriate refrigerant leak
detector to monitor the operation area and make sure the technicians
can be well aware of any potential or actual leakage of inflammable gas.
Make sure the leak detecting device is applicable to inflammable
refrigerant. For example, it should be free of sparks, completely sealed
and safe in nature.
See the following table for the amount of additional refrigerant.
Item
Model
Standard
Pipe Length
Unnecessary
Charge Pipe
Length
Additional Refrigerant
Amount for Extra Pipe
GUD35W/NhA-T
5.0m
≤7
.0m
16 g/m
GUD50W/NhA-T
GUD71W/NhA-T
40 g/m
GUD85W/NhA-T
GUD100W/NhA-T
GUD100W/NhA-X
GUD125W/NhA-T
GUD125W/NhA-X
GUD140W/NhA-T
7.5m
≤9.5m
GUD140W/NhA-X
GUD160W/NhA-X