37
Configuration of connection pipe
1. Standard length of connection pipe
• 16 ft.
2. Min. length of connection pipe is 9.8 ft.
3. Max. length of connection pipe and max. hight difference.
Cooling
capacity
Max length
of connec-
tion pipe
Max
height
difference
5000Btu/h
(1465W)
49 ft
16 ft
7000Btu/h
(2051W)
49 ft
16 ft
9000Btu/h
(2637W)
49 ft
16 ft
12000Btu/h
(3516W)
65 ft
32 ft
18000Btu/h
(5274W)
82 ft
32 ft
Cooling
capacity
Max length
of connection
pipe
Max height
difference
24000Btu/h
(7032W)
82 ft
32 ft
28000Btu/h
(820W)
98 ft
32 ft
36000Btu/h
(10548W)
98 ft
65 ft
24000Btu/h
(3516W)
98 ft
65 ft
48000Btu/h
(14064W)
98 ft
65 ft
4. The additional refrigerant oil and refrigerant charging required after
prolonging connection pipe
• After the length of connection pipe is prolonged for 32 ft at the basis of
standard length, you should add 0.17 oz of refrigerant oil for each additional
16 ft of connection pipe.
• The calculation method of additional refrigerant charging amount (on the
basis of liquid pipe):
Additional refrigerant charging amount = prolonged length of liquid pipe ×
additional refrigerant charging amount per meter.
• Basing on the length of standard pipe, add refrigerant according to the
requirement as shown in the table. The additional refrigerant charging
amount per meter is different according to the diameter of liquid pipe. See
the following sheet