System
Table 15. Minimum starting Ambient Temperature
Unit | With | No | With | No |
Size | HGBP | HGBP | HGBP | HGBP |
|
|
|
|
|
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 |
|
|
|
|
1 | A | 50% |
|
20 | A, B | 100% |
|
2 |
| ||
|
|
|
|
1 | B | 40% |
|
25 | A, B | 100% |
|
2 |
| ||
|
|
|
|
1 | A | 50% |
|
30 | A, B | 100% |
|
2 |
| ||
|
|
|
|
1 | A | 50% |
|
2 | A | 50% | C (50%) |
40 | A | 50% | C, D (100%) |
3 | |||
4 | A, B | 100% | C, D (100%) |
|
|
|
|
1 | A | 61% |
|
2 | A | 61% | C (61%) |
50 | A | 61% | C, D (100%) |
3 | |||
4 | A, B | 100% | C, D (100%) |
|
|
|
|
1 | A | 50% |
|
2 | A | 50% | C (50%) |
60 | A | 50% | C, D (100%) |
3 | |||
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.
94 |
