8
Installation and Maintenance
(3) The water outlet can't be placed in water in order to drain
smoothly.(As show in Fig.27)
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
Vacuum pump
Manifold gauge
Valve cap
Lo
Hi
Inner hex
wrench
Open
Close
The drain hose can't be fluctuant
The drain hose
can't be fluctuant
The water
outlet can't be
fluctuant
No.
Items to be checked
Possible malfunction
1
Has the unit been
installed firmly?
The unit may drop, shake or
emit noise.
2
Have you done the
refrigerant leakage test?
It may cause insufficient cooling
(heating) capacity.
3
Is heat insulation of
pipeline sufficient?
It may cause condensation and
water dripping.
4
Is water drained well?
It may cause condensation and
water dripping.
5
Is the voltage of power
supply according to the
voltage marked on the
nameplate?
It may cause malfunction or
damage the parts.
6
Is electric wiring and
pipeline installed
correctly?
It may cause malfunction or
damage the parts.
7
Is the unit grounded
securely?
It may cause electric
shock
.
8
Does the power cord
follow the specification?
It may cause malfunction or
damage the parts.
9
Is there any obstruction
in air inlet and air outlet?
It may cause insufficient cooling
(heating).
10
The dust and
sundries caused
during installation are
removed?
It may cause malfunction or
damaging the parts.
11
The gas valve and liquid
valve of connection pipe
are open completely?
It may cause insufficient
cooling
(heating).
The water outlet
can't be placed
in water
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
manifold gauge
to the
refrigerant charging vent of gas valve and then connect the
other charging hose to the vacuum pump.
(3)
Open the
manifold gauge
completely and operate for
10-15min to check if the pressure of
manifold gauge
remains in
-0.1MPa.
(4)
Close the vacuum pump and maintain this status for 1-2min
to check if the pressure of
manifold gauge
remains in
-0.1MPa. If the pressure decreases, there may be leakage.
(5)
Remove the
manifold gauge
, open the valve core of liquid
valve and gas valve completely with inner hex
wrench
.
(6)
Tighten the screw caps of valves and refrigerant
charging
vent.(As show
n
in Fig.28)
1. Check after Installation
Check according to the following requirement
s
after
finishing
installation.
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
operations
.
● If the ambient temperature is lower than 16
℃
, the air
conditioner can’t start cooling.
2. Leakage detection
(1)
Check for leaks using the
leak detector:
(2)
With soap water:
if a leak detection tool is unavailable, use soap water to detect
any leak.
Apply soap water
to the suspected leak position and
observe for 3 minutes, if bubbles appear then there is a leak.
2.9
Vacuum Pump
/
Leak Detection
2.10
Post Installation Testing
Fig.26
Fig.27
Fig.28
Summary of Contents for DHY09CSB21S
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