AUX AMWM-H07/4R3, Technical Manual

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AUX DC Inverter Free Match 50HZ R32
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Equivalent pipe length conversion
Equivalent pipe length means converting pipe elbow to straight pipe length after considerate
the pressure loss.
Elbow and Oil loop conversion tablet
Type
Pipe Dia.(mm)
Bend Oil Loop
6.35 0.10 0.7
9.52 0.18 1.3
12.70 0.20 1.5
15.88 0.25 2.0
19.05 0.35 2.4
22.02 0.40 3.0
Equivalent pipe length L
＝
Actual Pipe length L+ Bend Qty× Equivalent pipe bend Oil
Loop Qty× Equivalent Oil Loop length
Sample:
AMCA-H09/4R3AActual Pipe length is 25 meters, Gas pipe diameter is 9.52mm. If there’s 5
bends and 2 oil loops during the installation, then the equivalent pipe length should be:
L=25+0.18×5+1.3×2=28.5(m)
9. Emptying or vacuum
Before charging the refrigerant to the system, to ensure that there is no impurities, water or
non-condensable gas. So, emptying and vacuum operation should be carried out.
◇
Vacuum: when process this operation please be sure that the connection pipe is tightened
up.
1. Screw off the cover of maintenance valve connection, connect the pressure gauge to the
connection of maintenance valve
2. Connect the vacuum pump to the pressure gauge, turn on the vacuum pump and pressure
gauge to process the vacuum operation toward the indoor unit and piping, while to ensure that the
absolute pressure is no less than 50Pa after this operation.