AUX AL-H12/4R1D, Service Manual

Page: 106 / 157

AUX-Light CAC 50Hz R410A Trouble shooting
106
Piping connection
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Using expanding machine to expand accessories, the size of horn shown in the above figure:
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Paint a thin layer of frozen oil at both inside and outside part of the expanding.
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Make the expanding right to the screw thread shape connection of the indoor unit, using hands to
tighten the nut then using a wrench to tighten the nut again, the tighten torque as follows figure.
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Take out the cover of the indoor unit gas valve and liquid valve, make the expanding right to the stop
valve of outdoor unit, using hands to tighten the nut then using a wrench to tighten the nut again, the
tighten torque as follows figure.
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
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:
ALCA-H42A
5/C5 Actual Pipe length is 25 meters, Gas pipe diameter is 19.05mm. If there’s 5 bends and 2
oil loops during the installation, then the equivalent pipe length should be:
L=25+0.35×5+2.4×2=31.5(m)
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Specification of connection pipe for indoor unit and outdoor unit
Cooling Capacity(Btu/h) 12000 18000 24000 36000 48000 60000
Connection
Pipe (mm)
Liquid Pipe
Φ6.35 Φ9.52 Φ9.52
Gas Pipe
Φ12.7 Φ15.88 Φ19.05
Max. Length 15 20 30 50 50
Max. Height (m) 10 15 15 30 30