Safety And Leakage Check; Test Running - Mandik KFR-09GW/BP User Manual

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2. When using the Vacuum pump
EN
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, slight-
ly 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 man-
ifold valve and stop the operation of the vacuum pump Make evacua-
tion for 15 minutes and more and check that the compound meter indi-
cates -76 cmHg (-1 0 × 105 Pa)
6 Turn the stem of the packed valve B about 450 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
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 17 °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 mainte-
nance 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)
4 The test operation should last about 30 minutes
Manual
AUTO/COOL
control button
Manifold valve
Compound meter Pressure gauge
-76 cmHg
Handle Lo
Charge hose
Charge hose
Packed valve
Indoor unit
D
check point
Cover
B
Outdoor unit
check point
Handle Hi
Vacuum pump
C
A