78
Service Manual
Installation and Maintenance
Appendix:
Appendix 1: Reference Sheet of Celsius and Fahrenheit
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
1.Standard length of connection pipe
● 5m, 7.5m, 8m.
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.
3.Max. length of connection pipe and max. high difference.(More details please refer to the specifications.)
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 refrigerant charging amount (on the basis of liquid pipe):
(1) Additional refrigerant charging amount= prolonged length of liquid pipe × additional refrigerant charging amount per meter
Appendix 2: Configuration of Connection Pipe
Additional refrigerant charging amount for R32
Diameter of connection pipe
Indoor unit throttle
Outdoor unit throttle
Liquid pipe(mm)
Gas pipe(mm)
Cooling only,cooling and heating (g / m)
Cooling only(g/m)
Cooling and heating(g/m)
Ф6
Ф9.5 or Ф12
16
12
16
Ф6 or Ф9.5
Ф16 or Ф19
40
12
40
Ф12
Ф19 or Ф22.2
80
48
96
Ф16
Ф25.4 or Ф31.8
136
24
96
Ф19
/
200
200
200
Ф22.2
/
280
280
280
(2)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.
Note: The additional refrigerant charging amount in Sheet 2 is recommended value, not compulsory.
