Test Running - LG LS-J0762YL Service Manual

6. Test Running

1. Check that all tubing and wiring have been properly
connected.
2. Check that the gas and liquid side service valves are
fully open.
1. Prepare remote control
Remove the battery cover
by pulling it according to the
arrow direction.
Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
Reattach the cover by
pushing it back into position.
NOTE:
• Use 2 AAA(1.5volt) batteries. Do not use recharge-
able batteries.
• Remove the batteries from the remote control if the
system is not going to be used for a long time.
2. Settlement of outdoor unit
Anchor the outdoor unit with a bolt and nut(ø10mm)
tightly and horizontally on a concrete or rigid mount.
When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
In the case when the vibration of the unit is con-
veyed to the hose, secure the unit with an anti-
vibration rubber.
Bolt
3. Evaluation of the performance
Operate unit for 15~20 minutes, then check the system
refrigerant charge:
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and dis-
charge of air.
Tubing connection
-37-
3. Ensure the difference between the intake tempera-
ture and the discharge is more than 8°C (Cooling) or
reversely (Heating).
Discharge air
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Outside ambient
Refrigerant
TEMP.
R-22 35°C (95°F)
R-410A 35°C (95°F)
NOTE: If the actual pressure are higher than shown, the
system is most likely over-charged, and charge
should be removed. If the actual pressure are low-
er than shown, the system is most likely under-
charged, and charge should be added.
The air conditioner is now ready for use.
PUMP DOWN
This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the
charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge the
air from the manifold hose using the refrigerant gas.
3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the cool-
ing operation.
5. When the low-pressure gauge reading becomes 1 to
0.5kg/cm 2 G(14.2 to 7.1 P.S.I.G.), fully close the gas
side valve stem and then quickly turn off the unit. At
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.
Intake temperature
Discharge
temperature
The pressure of the gas side
service valve.
4.5~5.5kg/cm 2 G(63.9~78.1 P.S.I.G.)
8.5~9.5kg/cm 2 G(120~135 P.S.I.G.)