Cooper & Hunter Alpha NG Inverter Series, Owner'S Manual

Page: 38 / 69

3 5
1. Standard length of connection pipe
● 5m
、
7.5m
、
8m
4. The calculation method of additional refrigerant oil and refrigerant charging amount
after prolonging connection pipe
After the length of connection pipe is prolonged for 10m at the basis of standard
length, you should add 5ml of refrigerant oil for each additional 5m of connection
pipe.
The calculation method of additional re f rigerant charging amount (on the basis
of liquid pipe):
(2)
(1) Additional refrigerant charging amount= prolonged length of liquid pipe × additional
refrigerant charging amount per meter
capacity capacity
5000Btu/h
(1465W)
24000Btu/h
(7032W)
7000Btu/h
(2051W)
28000Btu/h
(8204W)
9000Btu/h
(2637W)
36000Btu/h
(10548W)
12000Btu/h
(3516W)
42000Btu/h
(12306W)
18000Btu/h
(5274W)
48000Btu/h
(14064W)
Max length of
connection pipe
Max length of
connection pipe
15 25
15 30
15 30
20 30
25 30
2. Min length of connection pipe
For the unit with standard connection pipe of 5m, there is no limitation for the
min length of connection pipe. For the unit with standard connection pipe of
7.5m and 8m, the min length of connection pipe is 3m.
Sheet 1 Max length of connection pipe Unit: m
3. Max length of connection pipe
Configuration of connection pipe
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 di f ferent according to the diameter of liquid pipe. See Sheet 2.