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Table 4C — Capacity Control Steps, 130-210 and Associated Modular Units (cont)
UNIT
SIZE
CONTROL
STEPS
LOADING SEQUENCE A LOADING SEQUENCE B
%
Compressors
%
CompressorsDisplacement Displacement
(Approx) (Approx)
170, 270A,
330A/B, 360B (50 Hz)
A1†**,B1†
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
5
9
14
14
19
23
28
28
33
37
42
48
52
57
61
67
72
76
81
87
91
96
100
A1††
A1*
A1
A1††,B1*
A1††,B1
A1*,B1
A1,B1
A1††,A2,B1*
A1††,A2,B1
A1*,A2,B1
A1,A2,B1
A1††,A2,B1*,B2
A1††,A2,B1,B2
A1*,A2,B1,B2
A1,A2,B1,B2
A1††,A2,A3,B1*,B2
A1††,A2,A3,B1,B2
A1*,A2,A3,B1,B2
A1,A2,A3,B1,B2
A1††,A2,A3,B1*,B2,B3
A1††,A2,A3,B1,B2,B3
A1*,A2,A3,B1,B2,B3
A1,A2,A3,B1,B2,B3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
170, 270A,
330A/B, 360B (50 Hz)
A1†,B1†**
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5
9
14
14
19
23
28
34
38
43
47
48
52
57
61
67
72
76
81
87
91
96
100
B1††
B1*
B1
A1*,B1††
A1,B1††
A1,B1*
A1,B1
A1*,B1††,B2
A1,B1††,B2
A1,B1*,B2
A1,B1,B2
A1*,A2,B1††,B2
A1,A2,B1††,B2
A1,A2,B1*,B2
A1,A2,B1,B2
A1*,A2,B1††,B2,B3
A1,A2,B1††,B2,B3
A1,A2,B1*,B2,B3
A1,A2,B1,B2,B3
A1*,A2,A3,B1††,B2,B3
A1,A2,A3,B1††,B2,B3
A1,A2,A3,B1*,B2,B3
A1,A2,A3,B1,B2,B3
170, 270A,
330A/B, 360B (50 Hz)
A1†**,B1†**
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
5
9
14
14
19
23
28
28
33
37
42
43
48
52
57
61
63
67
72
76
81
82
87
91
96
100
A1††
A1*
A1
A1††,B1*
A1††,B1
A1*,B1
A1,B1
A1††,A2,B1*
A1††,A2,B1
A1*,A2,B1
A1,A2,B1
A1††,A2,B1††,B2
A1††,A2,B1*,B2
A1††,A2,B1,B2
A1*,A2,B1,B2
A1,A2,B1,B2
A1††,A2,A3,B1††,B2
A1††,A2,A3,B1*,B2
A1††,A2,A3,B1,B2
A1*,A2,A3,B1,B2
A1,A2,A3,B1,B2
A1††,A2,A3,B1††,B2,B3
A1††,A2,A3,B1*,B2,B3
A1††,A2,A3,B1,B2,B3
A1*,A2,A3,B1,B2,B3
A1,A2,A3,B1,B2,B3
5
9
14
14
19
23
28
29
34
38
43
47
48
52
57
61
63
67
72
76
81
82
87
91
96
100
B1††
B1*
B1
A1*,B1††
A1,B1††
A1,B1*
A1,B1
A1††,B1††,B2
A1*,B1††,B2
A1,B1††,B2
A1,B1*,B2
A1,B1,B2
A1*,A2,B1††,B2
A1,A2,B1††,B2
A1,A2,B1*,B2
A1,A2,B1,B2
A1††,A2,B1††,B2,B3
A1*,A2,B1††,B2,B3
A1,A2,B1††,B2,B3
A1,A2,B1*,B2,B3
A1,A2,B1,B2,B3
A1††,A2,A3,B1††,B2,B3
A1*,A2,A3,B1††,B2,B3
A1,A2,A3,B1††,B2,B3
A1,A2,A3,B1*,B2,B3
A1,A2,A3,B1,B3,B3
*Unloaded compressor.
†Compressor unloader, standard.
**Compressor unloader, accessory.
††Two unloaders, both unloaded.
NOTE: These capacity control steps may vary due to lag compressor
sequencing.
20