212
Installation and Maintenance
Service Manual
Appendix:
1.Standard length of connection pipe.
（
More details please refer to the specications
）
2.Min length of connection pipeFor the unit with standard connection pipe of 5m, there is no limitation for themin length of
connection pipe. For the unit with standard connection pipe of 7.5m and 8m, the min length of connection pipe is 3m.
3.Max length of connection pipe
（
More details please refer to the specications
）
4.The additional refrigerant oil and refrigerant charging required 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 refrigerant charging amount (on the basis of liquid 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 different according to the diameter of liquid pipe. See Sheet 2.
● Additional refrigerant charging amount = prolonged length of liquid pipe X additional refrigerant charging amount per meter
Appendix 1: Reference Sheet of Celsius and Fahrenheit
Appendix 2: Conguration of Connection Pipe
Set temperature
Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1
.
8+32
Ambient temperature
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
32/33 32 0 55/56 55.4 13 79/80 78.8 26
34/35 33.8 1 57/58 57.2 14 81 80.6 27
36 35.6 2 59/60 59 15 82/83 82.4 28
37/38 37.4 3 61/62 60.8 16 84/85 84.2 29
39/40 39.2 4 63 62.6 17 86/87 86 30
41/42 41 5 64/65 64.4 18 88/89 87.8 31
43/44 42.8 6 66/67 66.2 19 90 89.6 32
45 44.6 7 68/69 68 20 91/92 91.4 33
46/47 46.4 8 70/71 69.8 21 93/94 93.2 34
48/49 48.2 9 72 71.6 22 95/96 95 35
50/51 50 10 73/74 73.4 23 97/98 96.8 36
52/53 51.8 11 75/76 75.2 24 99 98.6 37
54 53.6 12 77/78 77 25
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
Fahrenheit
display
temperature
（℉）
Fahrenheit
（℉）
Celsius
（℃）
61 60.8 16 69/70 69.8 21 78/79 78.8 26
62/63 62.6 17 71/72 71.6 22 80/81 80.6 27
64/65 64.4 18 73/74 73.4 23 82/83 82.4 28
66/67 66.2 19 75/76 75.2 24 84/85 84.2 29
68 68 20 77 77 25 86 86 30
Additional refrigerant charging amount for R32
Diameter of connection pipe Indoor unit throttl Outdoor unit throttle
Liquid pipe Gas pipe
Cooling only,cooling
and heating(g / m)
Cooling only(g / m) Cooling and heating(g / m)
Φ1/4'' Φ3/8'' or Φ1/2'' 16 12 16
Φ1/4'' or Φ3/8'' Φ5/8'' or Φ3/4'' 40 12 40
Φ1/2'' Φ3/4'' or Φ7/8'' 80 24 96
Φ5/8'' Φ1'' or Φ1 1/4'' 136 48 96
Φ3/4'' / 200 200 200
Φ7/8'' / 280 280 280
Note: The additional refrigerant charging amount in Sheet 2 is recommendedvalue, not compulsory.
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