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94 SS-SVX09A-EN
System Start-Up
Unit
Size
With
HGBP
No
HGBP
With
HGBP
No
HGBP
20-60 45° 40° 10° 0°
Note: Minimum starting ambients in degrees F and is based on the unit operating at minimum step of unloading and 5 mph
wind across condenser.
Table 16. Compressor Sequence
Unit Size Control Step Circuit 1 Circuit 2
20
1A50%
2 A, B 100%
25
1B40%
2 A, B 100%
30
1A50%
2 A, B 100%
40
1A50%
2 A 50% C (50%)
3 A 50% C, D (100%)
4 A, B 100% C, D (100%)
50
1A61%
2 A 61% C (61%)
3 A 61% C, D (100%)
4 A, B 100% C, D (100%)
60
1A50%
2 A 50% C (50%)
3 A 50% C, D (100%)
4 A, B 100% C, D (100%)
Note: A, B, C and D indicate which compressor in the unit is operating. (%) indicates the amount of the circuit in operation
during a given step. refer to the compressor location illustration for the unit.
Table 15. Minimum starting Ambient Temperature