Carrier 48FP - Page 69

69
Table 55 — Compressor Loading and Unloading Sequences (60 Hz Units) (cont)
COOLING
STAGE
SIZE 064 UNITS
Lead Circuit Lag Circuit
Active
Cyls
Percent
Capacity
Comp 1
Unloader
U1
Unloader
U1A
Comp 2
Unloader
U2
Unloader
U2A
0
OFF OFF OFF OFF OFF OFF 0 0
1
ON ON ON OFF OFF OFF 2 17
2
ON ON OFF OFF OFF OFF 4 33
3
ON OFF OFF OFF OFF OFF 6 50
4
ON OFF OFF ON ON ON 8 67
5
ON OFF OFF ON ON OFF 10 83
6
ON OFF OFF ON OFF OFF 12 100
COOLING
STAGE
SIZE 074,078 UNITS
Lead Circuit Lag Circuit
Active
Cyls
Percent
Capacity
Comp 1
Unloader
U1
Unloader
U1A
Comp 2
Unloader
U2
Unloader
U2A
0
OFF OFF OFF OFF OFF OFF 0 0
1
ON ON ON OFF OFF OFF 2 14
2
ON ON OFF OFF OFF OFF 4 29
3
ON OFF OFF OFF OFF OFF 6 43
4
ON OFF OFF ON ON ON 8 62
5
ON OFF OFF ON ON OFF 10 81
6
ON OFF OFF ON OFF OFF 12 100
COOLING
STAGE
SIZE 088 UNITS
Lead Circuit Lag Circuit
Active
Cyls
Percent
Capacity
Comp A1
Unloader
UA1
Unloader
UA2
Comp B1
Unloader
UB1
Unloader
UB2
0
OFF OFF OFF OFF OFF OFF 0 0
1
ON ON ON OFF OFF OFF 2 17
2
ON ON OFF OFF OFF OFF 4 33
3
ON OFF OFF OFF OFF OFF 6 50
4
ON OFF OFF ON ON ON 8 67
5
ON OFF OFF ON ON OFF 10 83
6
ON OFF OFF ON OFF OFF 12 100
COOLING
STAGE
SIZE 104 UNITS
Lead Circuit Lag Circuit
Active
Cyls
Percent
Capacity
Comp A1
Unloader
UA1
Comp
A2
Comp B1
Unloader
UB1
Comp
B2
0
OFF OFF OFF OFF OFF OFF 0 0
1
ON ON OFF OFF OFF OFF 4 20
2
ON OFF OFF OFF OFF OFF 6 30
3
ON ON OFF ON OFF OFF 8 40
4
ON ON OFF ON OFF OFF 10 50
5
ON OFF OFF ON OFF OFF 12 60
6
ON ON ON ON ON OFF 12 60
7
ON ON ON ON OFF OFF 14 70
8
ON OFF ON ON OFF OFF 16 80
9
ON ON ON ON ON ON 16 80
10
ON ON ON ON OFF ON 18 90
11
ON OFF ON ON OFF ON 20 100