Singer SNG21-09IVi, User Manual, Page: 102 / 112

102
GB
Cooling Capacity
Max length of
connection pipe
5000 (BTU/h) (1465W)
7000 (BTU/h) (2051W)
9000 (BTU/h) (2637W)
15
12000 (BTU/h) (3516W) 20
18000 (BTU/h) (5274W)
24000 (BTU/h) (7032W)
25
28000 (BTU/h) (8204W)
36000 (BTU/h) (10548W)
42000 (BTU/h) (12306W)
48000 (BTU/h) (14064W)
30
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 x
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.
Con fi guration of connection pipe
Diameter of connection pipe
mm
Indoor unit
throttle
Outdoor unit throttle
Liquid pipe Gas pipe
Cooling only,
cooling and
heating (g / m)
Cooling only
(g / m)
Cooling and
heating (g / m)
1/4’’ 3/8’’ or 1/2’’ 16 12 16
1/4’’ or 3/8’’ 5/8’’ or 3/4’’ 40 12 40
1/2'’ 3/4’’ or 7/8’’ 80 24 96
5/8’’ 1’’ or 1 1/4’’ 136 48 96
3/4’’ - 200 200 200
7/8’’ - 280 280 280