AUX AMCA-H09/4R1A, Service Manual

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AUX DC Inverter Free Match 50HZ R410A Installation
89
Equivalent pipe length conversion
Equivalent pipe length meansconverting 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
＝
ActualPipe length L+ Bend Qty× Equivalent pipe bend Oil Loop Qty× Equivalent
Oil Loop length
Sample:
AMCA-H09/4R1AActual Pipe length is 25 meters, Gas pipe diameter is 9.52
mm. 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)
◇
Specification of connection pipe for indoor unit and outdoor unit
Cooling Capacity(Btu/h) 18000 24000 27000 36000 42000
Connection Pipe (mm)
Liquid Pipe
Φ6.35
Gas Pipe
Φ9.52
Max. Length(Each) 15
Max. Height (m) 10
Max. Bend Qty 5
Extra R410a per meter when the pipe length is more
than 5 meter (kg)
0.022
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.
3. Turn off the pressure gauge and vacuum pump to keep the pressure in the same level in 20 minutes.
◇
Emptying: when process this operation, please disconnect the high pressure valve with liquid valve.
1. Connect the gas valve of the stop valve to the thimble side of the rubber hoses, the other side of rubber hoses
should be connected to the refrigerant tank.
2. Open the refrigerant tank valve, using the refrigerant inside the tank with high speed to empty the air in the indoor
unit and the connection piping. When the outlet air becomes mist (it feels cold by touching it), then the air is
emptied.
3. When ensure that the air is emptied, connect and tighten the high pressure valve of outdoor unit stop valve and
liquid side connection pipe, keep this state more than 10 seconds.
4. Use soapy what to test each connection junctions (including lengthen piping welding junction)
5. Confirmed that there is no leakage, turn off the valve of refrigerant tank, take down the rubber hose as well.