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1. Connect charging hose of manifold valve to charge end of low pressure valve
(both high/low pressure valves must be tightly shut).
2. Connect joint of charging hose to vacuum pump.
3. Fully open the handle of Lo manifold valve.
4. Open the vacuum pump for vacuumization. At the beginning, slightly loosen
joint nut of low pressure valve to check if there is air coming inside. (If noise of
vacuum pump has been changed, the reading of multimeter is 0) Then tighten
the nut.
5. Keep evacuating for more than 15mins and make sure the reading of multi-
meter is-1.0
10 pa(-76cmHg).
6. Fully open high/low pressure valves.
7. Remove charging hose from charging end of low pressure valve.
8. Tighten bonnet of low pressure valve. (As shown in Fig.6)
7.4.2 Air Purging and Leakage Test
Fig.6
Manifold Valve
Multimeter
-76cmHg
Lo Handle
Charging hose
Manometer
Hi handle
Vacuum pump
Low pressure valve
7.5.1 Check after Installation
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Has the unit been fixed firmly?
The unit may drop, shake or emit noise.
Have you done the refrigerant leakage test?
It may cause insufficient cooling(heating)
Is thermal insulation sufficient?
It may cause condensation.
Is water drainage satisfactory?
It may cause water leakage.
Is the voltage in accordance with the rated
voltage marked on the nameplate?
It may cause electric malfunction
or damage the unit.
Is the electric wiring or piping
connection installed correctly and securely?
It may cause electric malfunction
or damage the parts.
Has the unit been securely earthed?
It may cause electrical leakage.
Is the power cord specified?
It may cause electric malfunction
or damage the parts.
Is the inlet or outlet blocked? It may cause insufficient cooling(heating)
Is the length of connection pipes
and refrigerant capacity recorded?
The refrigerant capacity is not accurate.
7.4.3 Outdoor Condensate Drainage (only for heat pump type)
During heating operation, the condensate and defrosting water should be
drained out reliably through the drain hose. Install the outdoor drain connector in
a
25 hole on the the base plate and attach the drain hose to the connector,so
that the waste water formed in the outdoor unit can be drained out .The hole diameter
25 must be plugged.
Whether to plug other holes will be determined by the dealers according to actual conditions.
Drain-water hole
Bottom frame
Drain plug
Hose (available commercially,
inner dia. 16mm)
Drain connecter
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