46
Configuration of connection pipe
1. Standard length of connection pipe: 5, 7.5, 8 m.
2. Min. length of connection pipe is 3 m.
3. Max. length of connection pipe and max. high
difference.
Cooling capacity
Max length
of pipe
Max. height
difference
5000 Btu/h
(1465 W)
15 m
5
7000 Btu/h
(2051 W)
15 m
5
9000 Btu/h
(2637 W)
15 m
5
12000 Btu/h
(3516 W)
20 m
10
180 Btu/h
(5274 W)
25 m
10
Cooling capacity
Max. length
of pipe
Max. height
difference
Btu/h
(1465 W)
15 m
5
7000 Btu/h
(2051 W)
15 m
5
9000 Btu/h
(2637 W)
15 m
5
12000 Btu/h
(3516 W)
20 m
10
180 Btu/h
(5274 W)
25 m
10
4. The additional refrigerant oil and refrigerant charging required after prolonging connection pipe.
• After the length of connection pipe is prolonged for 10 m at the basis of standard length, you should add
5 ml of refrigerant oil for each additional 5 m 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:
Diameter of connection pipe
Outdoor unit throttle
Liquid pipe(mm)
Gas pipe(mm)
Cooling only( g/m)
Cooling and heating (g/m)
ø 6
ø 9,52 or ø 12
15
20
ø 6 oder ø 9,52
ø 16 or ø 19
15
50
ø 12
ø 19 or ø 22,2
30
120
ø 16
ø25,4 or 31,8
60
120
ø 19
-
250
250
ø 22,2
-
350
350
