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NACM/EACM
ROOM AIR CONDITIONER - SPLIT WALL-MOUNTED TYPE
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CAUTION
When using the Vacuum Pump
Completely tighten the flare nuts, A, B, C, D, connect the
manifold valve charge hose to a charge port of the packed valve
on the gas pipe side.
Connect the charge hose connection to the vacuum pump.
Fully open the handle Lo of the manifold valve.
Operate the vacuum pump to evacuate. After starting
evacuation, slightly loose the flare nut of the packed valve on
the gas pipe side and check that the air is entering. (Operation
noise of the vacuum pump changes and a compound meter
indicates 0 instead of minus)
After the evacuation is complete, fully close the handle Lo of the
manifold valve and stop the operation of the vacuum pump.
Make evacuation for 15 minutes and more and check
that the compound meter indicates -76cmHg(-1.0x105Pa).
Turn the stem of the packed valve B about 45O counterclockwise
for 6~7 seconds after the gas coming out, then tighten the
flare nut again. Make sure the pressure display in the pressure
indicator is a little higher than the atmosphere pressure.
Remove the charge hose from the Low pressure charge hose.
Fully open the packed valve stems B and A.
Securely tighten the cap of the packed valve.
Safety and leakage check
Soap water method:
Apply a soap water or a liquid neutral detergent on the indoor
unit connections and outdoor unit connections by a soft brush
to check for leakage of the connecting points of the piping. If
bubbles come out, it indicates that the pipes have leakage.
Leak detector
Use the leak detector to check for leakage.
Testrunning
Perform test operation after completing gas leak check at the
flare nut connections and electrical safety check.
Check that all tubing and wiring have been properly connected.
Check that the gas and liquid side service valves are fully open.
Connect the power, press the ON/OFF button on the remote
controller to turn the unit on.
Use the MODE button to select COOL, HEAT, AUTO and FAN to
check if all the functions works well.
When the ambient temperature is too low (lower than
17OC/62OF), the unit cannot be controlled by the remote
controller to run at cooling mode, manual operation can
be taken. Manual operation is used only when the remote
controller is disable or maintenance necessary.
Hold the panel sides and lift the panel up to an angle until it
remains fixed with a clicking sound.
Press the Manual control button to select the AUTO or COOL,
the unit will operate under Forced AUTO or COOL mode (see
User Manual for details).
The test operation should last about 30 minutes.
A: Lo packed valve B: Hi packed valve C and D are ends of indoor
unit connection.
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