LG LA121HPMI - Manual (Page 32)

32 Room Air Conditioner
Outside ambient TEMP. The pressure of the gas side service valve
95°F(35°C) 8.5~9.5kg/cm 2 G(120~135 P.S.I.G.)
Settlement of outdoor unit
■ Anchor the outdoor unit with a bolt and
nut(ø10mm(0.39in) 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.
1. Check that all tubing and wiring have been
properly connected.
2. Check that the gas and liquid side service
valves are fully open.
Prepare remote control
1. Remove the battery cover
by pulling it according to the
arrow direction.
2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.
3. Reattach the cover by
pushing it back into position.
NOTE:
• Use 2 AAA(1.5volt) batteries. Do not use
rechargeable batteries.
• Remove the batteries from the remote control if
the system is not going to be used for a long
time.
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.
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 lower than shown,
the system is most likely undercharged,
and charge should be added.
The air conditioner is now ready for use.
Bolt
Tubing connection
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 of refrigerant.
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 cooling
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 refriger-
ant will have been collected in the outdoor unit.
PUMP DOWN
2. Measure the temperature of the intake and discharge
of air.
3. Ensure the difference between the intake tem-
perature and the discharge is more than
46.4°F(8°C) (Cooling) or (Heating).
4. For reference; the gas side pressure of optimum
condition is as below.(Cooling)
Discharge
temperature
Discharge air
Intake temperature
Test Running
Test Running