Installation

17 ENGLISH
Fig.3.5.3-2
NOTE:
• The wiring diagram as shown just
for reference only, please refer to the
label stickerd on the unit for correct
connection.
After conrming the above conditions,
prepare the wiring as follows:
• The screws which fasten the wiring
to the terminal block may come loose
from vibrations during transportation.
• Check and make sure all screws are
well xed.
• Be sure the circuit capacity is sufcient.
• Ensure the starting voltage is
maintained at over 90% of the rated
voltage marked on the nameplate.
• Conrm that the cable thickness is
as specied in the power source
specication.
• Always install a Residual Current Device
(RCD) in wet or moist area.
• The following may be caused by
voltage drop: Vibration of a contactor,
which will damage the contact point,
fuse blowing, disturbance of the normal
function of the overload.
• The means for disconnection from a
power supply shall be incorporated in
the xed wiring and have an air gap
contact separation of at least 3mm in
each active (phase) conductor.
3.6 Air Purging and Leakage
Test
Air and moisture in the refrigeration system
have undesirable effects as indicated
below:
• Pressure in the system rises.
• Operating current rises.
• Cooling or heating (only for models with
heating function) efciency drops.
• Moisture in the refrigerant circuit may
freeze and block capillary tubing.
• Water may lead to corrosion of parts in
the refrigeration system.
Therefore, the indoor unit and tubing
between the indoor and outdoor unit must
apply leakage test and be evacuated
to remove any noncondensables and
moisture from the system.
3.6.1 Air Purging With Vacuum
Pump
1. Check that each tube (both liquid and
gas side tubes) between the indoor
and outdoor units have been properly
connected and all wiring for the test
run has been completed. Remove the
service valve caps from both the gas
and the liquid side on the outdoor unit.
Note that both the liquid and the gas
side service valves on the outdoor unit
are kept closed at this stage.
2. When relocating the unit to another
place, perform evacuation using
vacuum pump.
3. Make sure the refrigerant added into
the air conditioner is in liquid form in
any case.
4. Except for inverter model, Systems
having the outdoor unit mounted
above the indoor unit (e.g. basement
installations) have the following
additional requirement: For systems
with elevation of 7.5m refrigerant lines
must be oil trapped between 2.5m
and 5m of elevation. For systems
with elevation of greater than 7.5m,
refrigerant lines must be oil trapped at
least every 5m of elevation. (no oil trap
Magnetic ring
(If supplied and
packed with the
accessories)