AUKS AL-H18/4DR1(U), Service Manual

Page: 42 / 161

AUKS DC Inverter 1 Drive1 50HZ R410A Ceiling & Floor Type
42
Bend 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:
ALCA-H48/5 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)
◇
Specification of Connection Pipe for Indoor Unit and Outdoor Unit
Cooling Capacity(Btu/h) 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 20 30 30 50
Max. Height (m) 15 15 20 30
Max. Bend Qty 5 8 8 10
Extra R410a per meter when the pipe
length is more than 5 meter (kg)
0.02 0.02 0.05 0.07
Caution:
1. The standard Pipe length is 5m, if the pipe length is less than this then no additional charging is
necessary. If the pipe length is more than this then you should charge more refrigerant into the system
according to the above Charging Data
2. The thickness of the pipe is 0.6-1.0, bearing pressure is 4.2MPa;
3. If the connection pipe is too long, the cooling capacity and stability would be decreased. And the more
bend quantity, the resistance in the piping system would be bigger, then the cooling and heating
capacity would be decreased even lead to compressor broken. We suggest you to use the shortest
connection pipe according to the pipe length parameter in this manual. If the height difference between
outdoor and indoor unit is more than 5m, an oil trap should be installed in the gas pipe for every 10
meters.