Vacuum Pumping And Leak Detection; Check After Installation And Test Operation - Gree GVC24AMXF-K3NTC7A Service Manual

8. Installation
Service Manual
The drain hose
can't be fluctuant
The drain
hose can't
be fluctuant
The water outlet
can't be fluctuant
Fig.24

8.7 Vacuum Pumping and Leak Detection

1. Use Vacuum Pump
(1) Remove the valve caps on the liquid valve and gas valve and
the nut of refrigerant charging vent.
(2) Connect the charging hose of piezometer to the refrigerant
charging vent of gas valve and then connect the other charging
hose to the vacuum pump.
(3) Open the piezometer completely and operate for 10-15min to
check if the pressure of piezometer remains in -0.1MPa.
(4) Close the vacuum pump and maintain this status for 1-2min
to check if the pressure of piezometer remains in -0.1MPa. If the
pressure decreases, there may be leakage.
(5) Remove the piezometer, open the valve core of liquid valve
and gas valve completely with inner hexagon spanner.
(6) Tighten the screw caps of valves and refrigerant charging
vent. (As show in Fig.26)
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
2. Leakage Detection
(1) With leakage detector:
Check if there is leakage with leakage detector.
(2) With soap water:
If leakage detector is not available, please use soap water for
leakage detection. Apply soap water at the suspected position
and keep the soap water for more than 3min. If there are air
bubbles coming out of this position, There's a leakage.
Installation and Maintenance
The water
outlet can't
be placed
in water
Fig.25
Piezometer
Lo Hi
Valve cap
Vacuum pump
Inner hexagon
spanner
Close
Open
Fig.26
8.8 Check after Installation and Test
Operation
1. Check after Installation
Check according to the following requirement after finishing
installation.
NO. Items to be checked
Has the unit been installed
1
firmly?
Have you done the
2
refrigerant leakage test?
Is heat insulation of pipeline
3
sufficient?
4 Is water drained well?
Is the voltage of power
supply according to the
5
voltage marked on the
nameplate?
Is electric wiring and pipeline
6
installed correctly?
Is the unit grounded
7
securely?
Does the power cord follow
8
the specification?
Is there any obstruction in
9
air inlet and air outlet?
The dust and sundries
10 caused during installation
are removed?
The gas valve and liquid
11 valve of connection pipe are
open completely?
Is the inlet and outlet of
12
piping hole been covered?
2. Test Operation
(1) Preparation of test operation
● The client approves the air conditioner installation.
● Specify the important notes for air conditioner to the client.
(2) Method of test operation
● Put through the power, press ON/OFF button on the remote
controller to start operation.
● Press MODE button to select AUTO, COOL, DRY, FAN and
HEAT to check whether the operation is normal or not.
● If the ambient temperature is lower than 16℃ , the air
conditioner can't start cooling.
Possible malfunction
The unit may drop, shake or
emit noise.
It may cause insufficient
cooling (heating) capacity.
It may cause condensation
and water dripping.
It may cause condensation
and water dripping.
It may cause malfunction or
damage the parts.
It may cause malfunction or
damage the parts.
It may cause electric
leakage.
It may cause malfunction or
damage the parts.
It may cause insufficient
cooling (heating) capacity.
It may cause malfunction or
damaging the parts.
It may cause insufficient
cooling (heating) capacity.
It may cause insufficient
cooling(heating) capacity or
waster eletricity.
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