Installation Manual
29
7.4.2 Air Purging and Leakage Test
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
-1.0X10
5
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)
7.4.3 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 Φ25 hole on 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.
7.5 Check after Installation and Test Operation
7.5.1 Check after Installation
Items to be checked
Possible malfunction
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.
Fig.6
Manifold Valve
Multimeter
-76cmHg
Lo Handle
Charging hose
Manometer
Hi handle
Vacuum pump
Low pressure valve
Drain-water hole
Bottom frame
Drain plug
Hose (available commercially,
inner dia. 16mm)
Drain connecter
Drain-water hole
Bottom frame
Hose (available commercially,
inner dia. 16mm)
Drain connecter
