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In case drain work on your outdoor unit is neccessary, follow the guidelines below.
•
One drain outlets are provided in the bottom plate of unit (drain plug and drain hose are field supply).
• In cold areas, do not use a drain hose with the unit. Otherwise,drain water may freeze and block the drain. In
case the use of a drain hose is unavoidable for one reason or another, it is recommended to install a heater tape
in order to protect drain from freezing.
• Make sure the drain works properly.
(4) Drain work of the outdoor unit
NOTICE
If drain holes of the outdoor unit are covered by a mounting base or by floor surface, raise the unit in order to
provide a free space of more than 100 mm under the outdoor unit.
D
C
174
174
A 600
B 408
450
A leg pitch1
B leg pitch2
C Drain hole
D Bottom frame
•
To ensure the efficiency, the pipe should be as short as
possible.
•
Daub the refrigerant oil on the connector and the flare nut.
• When bending the pipe, the bending semi-diameter should
be as large as possible against the pipe being broken or
bent.
• When connecting the pipe, aim at the center to thread the
nut by hand and tighten it with the double spanners.
• Don't let the impurity such as sand, water etc into the pipe.
Pipe connection method:
Cautions in piping installation:
•
When welding the connector with hard solder, charge nitrogen into the pipe against oxidation. Or the oxygen film
in the pipe will clog the capillary and the expansion valve, even caue the deathy accident.
• The refrigerant pipe should be clean. If the water and the other impurity enter the pipe, charge the nitrogen to
clean the pipe. The nitrogen should flow under the pressure of about 0.5Mpa and when charging the nitrogen,
stop up the end of the pipe by hand to enhance the pressure in the pipe, then loose the hand (meanwhile stop up
the other end).
• The piping installation should be executed after the stop valves are closed.
• Before welding the valve and the pipes, use the wet cloth to cool down the valve and the pipes.
• When the connection pipe and the branch pipe need to be cut down, please use the special shears and cannot
use the saw.
(5) Refrigerant pipe connection
AW082SNCHA
AW102SNCHA
When fastening and loosing the nut, operate
with double spanners, because only one
spanner cannot execute firmly.
If threading the nut as not aiming at the
center, the screw thread will be damaged,
further it will cause leakage.
Spanner
Connector
Nut
Spanner
