32
GB
DC Inverter U-match Series Duct Type Unit
28
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
Charge Pipe
Refrigerant Amount
5.0m
≤
7.0m
16g/m
40 g/m
7.5m
≤
9.5m
3.2.6 Installation of Drain Pipe
3.2.6.1 Indoor Side Drainage Pipe
NOTICE
Install the drain hose in accordance with the instructions in this installation manual
and keep the area warm enough to prevent condensation. Problems with the
piping may lead to water leaks.
(1) Install the drain hose with downward gradient (1/50 to 1/100) and no risers or
traps are used for the hose. See the following figure.
(2) Be sure there is no crack or leak on the drain hose to avoid the formation of air
3.5KW
5.0KW
7.1KW
8.5KW
10.0KW
12.5KW
14.0KW
16.0KW
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