AUX ALCF-H18/NDR3HA, Service Manual

Page: 59 / 174

R32
High Efficiency DC Inverter LCAC
55
5. Equivalent Pipe length conversion
Equivalent pipe length means converting pipe elbow to straight pipe length after
considerate the pressure loss.
Bend and Oil Loop Conversion tablet
Type
Pipe Dia.(mm)
Bend
（
m
）
Oil Loop(m)
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:
ALCA-H42/5 Actual Pipe length is 25 meters, Gas pipe diameter is 15.88mm. If there’s 5
bends and 2 oil loops during the installation, then the equivalent pipe length should be:
L=25+0.25×5+2.0×2=30.25(m)
Note:
If there is relatively level difference of indoor and outdoor unit, S-shaped oil trap must be
installed every 8~10m for vertical pipe.