Technical Information
ƲƱ
c. The water outlet cant be placed in water in order to drain
smoothly.(As show in Fig.27)
Ƴ
.7 VACUU
M PUMPING AND LEAK
DETECTION
1. Use Vacuum Pump
• Remove valve caps from liquid valve and gas valve and form
the nut of refrigerant charging vent.
• Connect charging hose of piezometer to the refrigerant
charging vent of the gas valve. Then connect the other
charging hose to the vacuum pump.
• Open piezometer completely and operate unit for 10-15
minutes in order to check pressure level of piezometer. Should
remain at -0.1MPa.
• Close vacuum pump and keep closed for 1-2 minutes to verify
pressure of piezometer remains at -0.1MPa. If the pressure
decreases, there MAY be leakage.
• Remove
piezometer,
completely
open both the valve core of
the liquid valve and gas valve with an inner hexagon spanner.
• Tighten screw caps of valves and refrigerant charging vent
(Shown in Figure #28 below).
2. Leakage Detection
• Check for leaks using leak detector.
• Use soapy water if leak detector is unavailable. Apply soapy
water to the area in question. Leave soap & water solution on
for 3 minutes. Watch for air bubbles coming from solution to
detect leak.
The drain hose can't be fluctuant
The drain hose
can't be fluctuant
The water
outlet can't be
fluctuant
The water outlet
can't be placed
in water
)LJ
)LJ
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
Vacuum pump
Piezometer
Valve cap
Lo
Hi
Inner hexagon
spanner
Open
Close
)LJ
Ƴ
.8 CHECK AFTER INSTALLATION
AND TEST OPERATION
1. Check after Installation
Use chart below
No.
Check Following
Possible Malfunction
1
Was unit installed firmly/
securely?
Unit may shake or emit
rattling noise.
2
Was refrigerant leakage
test performed?
This may cause insufficient
cooling heating) capacity.
3
Is heat insulation of
pipeline sufficient?
May cause condensation
and water leakage.
4
Does water drain well?
May cause leakage.
5
Does voltage of power
supply match voltage
listed on nameplate?
Malfunction and damage to
the unit may result.
6
Was electric wiring
and pipeline installed
correctly?
Malfunction and damage to
the unit may result.
7
Was the unit properly
grounded?
May experience electric
leakage.
8
Does the power cord
meet specification?
Malfunction and damage to
the unit may result.
9
Are there obstructions in
the air inlet/outlet?
This may cause insufficient
cooling heating) capacity.
10
Was unit free of dust and
packing material prior to
installation?
Malfunction and damage to
the unit may result.
11
Are both the gas valve
and liquid valve open
completely?
This may cause insufficient
cooling heating) capacity.
12
Have both the inlet and
outlet piping hole been
covered?
This may cause insufficient
cooling heating) capacity.
May waste electricity.
2. Test Operation
• Prep test operation
o Client approves air conditioner installation.
o Specify the important notes of the air conditioner to the
client.
• Method of test
o Turn on power. Press ON/OFF button on the remote
controller to start operation.
o Press MODE button to select AUTO, COOL, DRY, FAN
and HEAT to check if the operation(s) is functioning.
o If the ambient temperature is lower than 60.8OºF – the
air conditioner cannot begin the cooling cycle.
