Table 19 — Compressor Loading and Unloading Sequences
COOLING
STAGE
SIZE 034 UNITS
Lead Circuit
Lag Circuit
Active
Cylinders
Percent
Capacity
Comp 1
Unloader
U1
Unloader
U2
Comp 2
0
OFF
OFF
OFF
OFF
0
0
1
ON
ON
ON
OFF
2
17
2
ON
ON
OFF
OFF
4
33
3
ON
OFF
OFF
OFF
6
50
4
ON
ON
ON
ON
8
67
5
ON
ON
OFF
ON
10
83
6
ON
OFF
OFF
ON
12
100
COOLING
STAGE
SIZE 038 UNITS
Lead Circuit
Lag Circuit
Active
Cylinders
Percent
Capacity
Comp 1
Unloader
U1
Unloader
U2
Comp 2
0
OFF
OFF
OFF
OFF
0
0
1
ON
ON
ON
OFF
2
14
2
ON
ON
OFF
OFF
4
28
3
ON
OFF
OFF
OFF
6
42
4
ON
ON
ON
ON
6
72
5
ON
ON
OFF
ON
8
86
6
ON
OFF
OFF
ON
10
100
COOLING
STAGE
SIZE 044 UNITS
Lead Circuit
Lag Circuit
Active
Cylinders
Percent
Capacity
Comp 1
Unloader
U1
Comp 2
0
OFF
OFF
OFF
0
0
1
ON
ON
OFF
2
25
2
ON
OFF
OFF
4
50
3
ON
ON
ON
6
75
4
ON
OFF
ON
8
100
COOLING
STAGE
SIZE 048 UNITS
Lead Circuit
Lag Circuit
Active
Cylinders
Percent
Capacity
Comp 1
Unloader
U1
Unloader
U2
Comp 2
0
OFF
OFF
OFF
OFF
0
0
1
ON
ON
ON
OFF
2
19
2
ON
ON
OFF
OFF
4
38
3
ON
OFF
OFF
OFF
6
58
4
ON
ON
ON
ON
6
62
5
ON
ON
OFF
ON
8
81
6
ON
OFF
OFF
ON
10
100
42
Summary of Contents for 48FK
Page 14: ...Fig 20 Unit Control Box Arrangement Sizes 034 048 14...
Page 15: ...Fig 21 Unit Control Box Arrangement Sizes 054 078 15...
Page 16: ...Fig 22 Unit Control Box Arrangement Sizes 088 and 104 16...
Page 39: ...Fig 44 Modulating Power Exhaust Component Locations Sizes 034 048 39...
Page 40: ...Fig 45 Modulating Power Exhaust Component Locations Sizes 054 104 40...
Page 56: ...Fig 55 Typical Wiring Schematic 48FK JK and 50FK FY JK JY Units 054 074 Shown 56...
Page 57: ...Fig 55 Typical Wiring Schematic 48FK JK and 50FK FY JK JY Units 054 074 Shown cont 57...