AUX QC Serie Manual De Instalación Y Usuario página 55

2. When using the Vacuum Pump
1. 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.
2. Connect the charge hose connection to the vacuum pump.
3. Fully open the handle Lo of the manifold valve.
4. 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)
5. 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(-1.0x10 Pa).
6. Turn the stem of the packed valve B about 45 counter-
clockwise 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.
7. Remove the charge hose from the Low pressure charge hose.
8. Fully open the packed valve stems B and A.
9. Securely tighten the cap of the packed valve.
3. Safety and leakage check
1. 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.
2. Leak detector
Use the leak detector to check for leakage.
CAUTION
A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
4. Test running
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.
1. Connect the power, press the ON/OFF button on the remote controller to turn the unit on.
2. Use the MODE button to select COOL, HEAT, AUTO and FAN to check if all the functions works
well.
3. When the ambient temperature is too low (lower than 18 C), 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, the unit will operate under Forced AUTO mode.
4. The test operation should last about 30 minutes.
OUTDOOR UNIT INSTALLATION
5
O
O
AUTO
55
Manifold valve
Compound meter Pressure gauge
-76cmHg
Handle Lo
Charge hose
Charge hose
Packed valve
Indoor unit
check point
Cover
Outdoor unit
check point
Handle Hi
Vacuum pump
D C
B A