Carrier Air Conditioner Operation And Service Manual page 21

Table 5B — Part Load Data Percent Displacement, With Accessory Unloaders
UNIT
30GTN,R
30GUN,R
040 (60 Hz)
040 (50 Hz)
045 (60 Hz)
045 (50 Hz)
050 (60 Hz)
050 (50 Hz)
060 (60 Hz)
060 (50 Hz)
070 (60 Hz)
070 (50 Hz)
080, 230B (60 Hz)
080, 230B (50 Hz)
090, 245B (60 Hz)
*Unloaded compressor.
†Two unloaders, both unloaded.
NOTE: Some control steps will be skipped if they do not increase chiller capacity when staging up or decrease chiller capacity when staging down.
LOADING SEQUENCE A
CONTROL
% Displacement
STEPS
(Approx)
1 25
2 50
3 75
4 100
1 24
2 47
3 45
4 61
5 84
6 100
7 —
1 18
2 31
3 44
4 38
5 51
6 69
7 82
8 100
1 15
2 28
3 42
4 33
5 47
6 67
7 80
8 100
1 16
2 33
3 50
4 31
5 49
6 66
7 83
8 100
1 11
2 19
3 27
4 25
5 33
6 49
7 57
8 73
9 84
10 92
11 100
1 11
2 22
3 34
4 41
5 55
6 67
7 78
8 89
9 100
1 8
2 17
3 25
4 33
5 46
6 54
7 62
8 71
9 84
10 92
11 100
1 9
2 18
3 27
4 35
5 44
6 53
7 56
8 65
9 74
10 82
11 91
12 100
% Displacement
Compressors
A1*
A1
A1*,B1
A1,B1
A1*
A1
A1*,B1†
A1*,B1*
A1,B1*
A1,B1
—
A1†
A1*
A1
A1†,B1†
A1*,B1†
A1*,B1*
A1,B1*
A1,B1
A1†
A1*
A1
A1†,B1†
A1*,B1†
A1*,B1*
A1,B1*
A1,B1
A1†
A1*
A1
A1†,B1†
A1*,B1†
A1*,B1*
A1,B1*
A1,B1
A1†
A1*
A1
A1†,B1†
A1*,B1†
A1*,B1*
A1,B1*
A1,B1
A1†,A2,B1
A1*,A2,B1
A1,A2,B1
A1†
A1*
A1
A1†,B1*
A1†,B1
A1*,B1
A1,B1
A1*,A2,B1
A1,A2,B1
A1†
A1*
A1
A1†,B1*
A1†,B1
A1*,B1
A1,B1
A1†,A2,B1*
A1†,A2,B1
A1*,A2,B1
A1,A2,B1
A1†
A1*
A1
A1†,B1
A1*,B1
A1,B1
A1†,A2,B1
A1*,A2,B1
A1,A2,B1
A1†,A2,B1,B2
A1*,A2,B1,B2
A1,A2,B1,B2
21
LOADING SEQUENCE B
Compressors
(Approx)
25 B1*
50 B1
75 A1,B1*
100 A1,B1
21 B1†
37 B1*
53 B1
45 A1*,B1†
61 A1*,B1*
84 A1,B1*
100 A1,B1
20 B1†
38 B1*
56 B1
38 A1†,B1†
51 A1*,B1†
69 A1*,B1*
82 A1,B1*
100 A1,B1
18 B1†
38 B1*
58 B1
33 A1†,B1†
47 A1*,B1†
67 A1*,B1*
80 A1,B1*
100 A1,B1
16 B1†
33 B1*
50 B1
31 A1†,B1†
49 A1*,B1†
66 A1*,B1*
83 A1,B1*
100 A1,B1
15 B1†
31 B1*
47 B1
25 A1†,B1†
33 A1*,B1†
49 A1*,B1*
57 A1,B1*
73 A1,B1
68 A1,A2,B1†
84 A1,A2,B1*
100 A1,A2,B1
15 B1†
30 B1*
44 B1
48 A1,B1†
63 A1,B1*
78 A1,B1
85 A1,A2,B1*
100 A1,A2,B1
— —
13 B1†
25 B1*
38 B1
50 A1,B1*
62 A1,B1
67 A1*,A2,B1†
75 A1,A2,B1†
88 A1,A2,B1*
100 A1,A2,B1
— —
— —
9 B1†
18 B1*
27 B1
35 A1,B1†
44 A1,B1*
53 A1,B1
62 A1,B1†,B2
71 A1,B1*,B2
80 A1,B1,B2
82 A1,A2,B1†,B2
91 A1,A2,B1*,B2
100 A1,A2,B1,B2