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flare nut
thread
pipeline
Гайка
развальцовки
Резьба
Трубопровод
wrench
wrench
Figure 11
Table 2
Tube size
(mm)
Torque
(N, m)
φ 6.35 (1/4”)
15~20
φ 9.52 (3/8”)
35~40
φ 12.70 (1/2”)
50~55
φ 15.88 (5/8”)
68~82
saturated with water, it will lubricate the components less effectively,
which will accelerate wear.
Air can be removed from the system using a vacuum pump.
For this operation you will need a vacuum pump, a high-pressure tube
and a group of two pressure gage: a high pressure and a low pressure
one (Fig. 13).
Without opening the control valve vents connect the hose from the
vacuum pump to the intake check valve and turn the equipment on.
It should operate for 15 to 30 minutes during which all air, vapors and
residual nitrogen will be extracted.
After that turn the vacuum pump off, close the pump valve, but leave
it connected for another 15 to 20 minutes. Observe the pressure gage
readings during this time. If the system is tight the pressure gage
readings will not change. If the pressure gage hands move – there
is a leak and it will have to be repaired. The leak can be located with
soap suds, leaky connections can be tightened (the problem is usually
related to the copper tube connection to the unit outlets).
If the system is tight, with the pump hose still connected fully pen
the valve at the bottom. Sounds will be heard in the pipes: the Freon
is filling the system. Then quickly unscrew the vacuum pump hose –
some frozen Freon may escape from the valve (wear protective gloves
to prevent frostbite). Now fully open the top valve (where the thinner
tube is connected).
Air conditioned installation is now completed.
cooler
outdoor unit
indoor unit
gas
liquid
half connection
sealed valve
manifold valve
manovacuum meter
manometer
TUBE WRAPPING
– Carefully wrap the tubes with the protective PVC tape, try not to
damage the pipelines and drain tube.
– Start the wrapping from the bottom of the outdoor unit towards the
indoor unit.
– Secure the PVC tape with adhesive tape for a more reliable fixation.
– The drain tube should be inclined downwards to ensure gravity
drainage flow.
– If the indoor unit is mounted lower than the outdoor unit the drain
tube should be routed separately, to prevent water backflow into the
indoor unit.
– Fasten the tubes on the wall with the special brackets (Fig. 12).
– Close the wall openings with a rubber gland or sealing compound.
hand Hi
hand Lo
inlet hose
Стена
wall
Vacuum pump
inlet hose
Зажим
clamp
low pressure valve
Защитная пленка ПВХ
PVC protective film
Figure 13
Figure 12
VACUUM TESTING
ATTENTION!
Moist air in the cooling circuit can cause malfunctions during air
conditioner operation.
ELECTRICAL CONNECTION
The connecting cables should comply with Table 3.
1. Indoor unit
Open the upper cover to the maximum position.
Remove the electrical panel cover from the unit. Loosen the screw on
the connection cover.
Remove the pressure plate.
Connect the power and signal wires in accordance with the connection
diagram on page 17 and in Fig. 15.
Firmly tighten the electrical panel cover screw and close the indoor
unit cover.
Moist outdoor air fills the copper tubes during installation. It will
penetrate into the system if it is not removed. This will cause the
compressor to work with a higher load and to overheat.
Moisture also negatively affects the functionality of the air conditioner.
The Freon refrigerant used in the AC contains a certain amount of oil
to lubricate the internal components. The oil is hygroscopic and, when
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