Example: Supply voltage is
AB = 452 volts
BC = 464 volts
AC = 455 volts
Average Voltage = | 452 + 464 + 455 | |
3 | ||
| ||
= | 1371 | |
| 3 |
= 457
Determine maximum deviation from average voltage: (AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v Maximum deviation is 7 v.
Determine percent voltage imbalance.
% Voltage Imbalance = 100 x | 7 |
457 | |
= 1.53% |
|
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electri- cal components.
NOTE: If more than 2% voltage imbalance is present, contact local electric utility.
BLOWER SELECTION — All water source heat pumps are factory set with the appropriate motor and sheave combination to achieve the desired airflow performance. Performance is selected by matching the desired performance with the appro- priate region in Tables
NOTE:
Table 3 — Electrical Data
50RTP | VOLTAGE | VOLTAGE | MIN/MAX | BLOWER |
| COMPRESSOR |
| MOTOR |
| TOTAL |
| MAX | |||
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| UNIT | MCA | FUSE/ | |||||
UNIT SIZE | CODE | VOLTAGE | OPTION | Qty |
| RLA | LRA | Qty | FLA |
| Hp | ||||
|
| FLA |
| HACR | |||||||||||
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|
| ||
| 5 | 197/254 | A,B,C | 1 |
| 10.4 | 73.0 | 1 | 4.0 |
| 1.0 | 14.4 | 17.0 | 25 | |
03 | 6 | 414/506 | A,B,C | 1 |
| 5.8 | 38.0 | 1 | 2.0 |
| 1.0 | 7.8 | 9.3 | 15 | |
| 1 | 518/633 | A,B,C | 1 |
| 3.8 | 36.5 | 1 | 1.4 |
| 1.0 | 5.2 | 6.2 | 15 | |
| 5 | 197/254 | A,B,C | 1 |
| 13.7 | 83.1 | 1 | 4.0 |
| 1.0 | 17.7 | 21.1 | 35 | |
| D,E | 1 |
| 13.7 | 83.1 | 1 | 5.0 |
| 1.5 | 18.7 | 22.1 | 35 | |||
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| ||||||||||
04 | 6 | 414/506 | A,B,C | 1 |
| 6.2 | 41.0 | 1 | 2.0 |
| 1.0 | 8.2 | 9.8 | 15 | |
D,E | 1 |
| 6.2 | 41.0 | 1 | 2.4 |
| 1.5 | 8.6 | 10.1 | 15 | ||||
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| ||||||||||
| 1 | 518/633 | A,B,C | 1 |
| 4.8 | 33.0 | 1 | 1.4 |
| 1.0 | 6.2 | 7.4 | 15 | |
| D,E | 1 |
| 4.8 | 33.0 | 1 | 1.9 |
| 1.5 | 6.7 | 7.9 | 15 | |||
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| ||||||||||
| 5 | 197/254 | A,B,C | 1 |
| 15.6 | 110.0 | 1 | 4.0 |
| 1.0 | 19.6 | 23.5 | 40 | |
| D,E | 1 |
| 15.6 | 110.0 | 1 | 5.0 |
| 1.5 | 20.6 | 24.5 | 40 | |||
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| ||||||||||
05 | 6 | 414/506 | A,B,C | 1 |
| 7.8 | 52.0 | 1 | 2.0 |
| 1.0 | 9.8 | 11.8 | 15 | |
D,E | 1 |
| 7.8 | 52.0 | 1 | 2.4 |
| 1.5 | 10.2 | 12.2 | 15 | ||||
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| ||||||||||
| 1 | 518/633 | A,B,C | 1 |
| 5.8 | 38.9 | 1 | 1.4 |
| 1.0 | 7.2 | 8.7 | 15 | |
| D,E | 1 |
| 5.8 | 38.9 | 1 | 1.9 |
| 1.5 | 7.7 | 9.2 | 15 | |||
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| ||||||||||
| 5 | 197/254 | A,B,C | 1 |
| 20.5 | 155.0 | 1 | 5.0 |
| 1.5 | 25.5 | 30.6 | 50 | |
| E | 1 |
| 20.5 | 155.0 | 1 | 6.2 |
| 2.0 | 26.7 | 31.8 | 50 | |||
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| ||||||||||
06 | 6 | 414/506 | A,B,C | 1 |
| 9.6 | 75.0 | 1 | 2.4 |
| 1.5 | 12.0 | 14.4 | 20 | |
E | 1 |
| 9.6 | 75.0 | 1 | 3.1 |
| 2.0 | 12.7 | 15.1 | 20 | ||||
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| ||||||||||
| 1 | 518/633 | A,B,C | 1 |
| 7.6 | 54.0 | 1 | 1.9 |
| 1.5 | 9.5 | 11.4 | 15 | |
| E | 1 |
| 7.6 | 54.0 | 1 | 2.3 |
| 2.0 | 9.9 | 11.8 | 15 | |||
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| ||||||||||
| 5 | 197/254 | A,B,C | 2 |
| 13.7 | 83.1 | 1 | 6.2 |
| 2.0 | 33.6 | 37.0 | 50 | |
| E | 2 |
| 13.7 | 83.1 | 1 | 9.2 |
| 3.0 | 36.6 | 40.0 | 50 | |||
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08 | 6 | 414/506 | A,B,C | 2 |
| 6.2 | 41.0 | 1 | 3.1 |
| 2.0 | 15.5 | 17.0 | 20 | |
E | 2 |
| 6.2 | 41.0 | 1 | 4.3 |
| 3.0 | 16.7 | 18.3 | 20 | ||||
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| 1 | 518/633 | A,B,C | 2 |
| 4.8 | 33.0 | 1 | 2.3 |
| 2.0 | 11.9 | 13.1 | 15 | |
| E | 2 |
| 4.8 | 33.0 | 1 | 3.4 |
| 3.0 | 13.0 | 14.2 | 15 | |||
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| 5 | 197/254 | A,B,C | 2 |
| 15.6 | 110.0 | 1 | 9.2 |
| 3.0 | 40.4 | 44.3 | 60 | |
| E | 2 |
| 15.6 | 110.0 | 1 | 14.1 |
| 5.0 | 45.3 | 49.2 | 60 | |||
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10 | 6 | 414/506 | A,B,C | 2 |
| 7.8 | 52.0 | 1 | 4.3 |
| 3.0 | 19.9 | 21.9 | 25 | |
E | 2 |
| 7.8 | 52.0 | 1 | 7.0 |
| 5.0 | 22.6 | 24.6 | 30 | ||||
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| 1 | 518/633 | A,B,C | 2 |
| 5.8 | 38.9 | 1 | 3.4 |
| 3.0 | 15.0 | 16.5 | 20 | |
| E | 2 |
| 5.8 | 38.9 | 1 | 5.2 |
| 5.0 | 16.8 | 18.3 | 20 | |||
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| 5 | 197/254 | A,B,C | 2 |
| 20.5 | 155.0 | 1 | 9.2 |
| 3.0 | 50.2 | 55.3 | 80 | |
| D,E | 2 |
| 20.5 | 155.0 | 1 | 14.1 |
| 5.0 | 55.1 | 60.2 | 80 | |||
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12 | 6 | 414/506 | A,B,C | 2 |
| 9.6 | 75.0 | 1 | 4.3 |
| 3.0 | 23.5 | 25.9 | 35 | |
D,E | 2 |
| 9.6 | 75.0 | 1 | 7.0 |
| 5.0 | 26.2 | 28.6 | 35 | ||||
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| 1 | 518/633 | A,B,C | 2 |
| 7.6 | 54.0 | 1 | 3.4 |
| 3.0 | 18.6 | 20.5 | 25 | |
| D,E | 2 |
| 7.6 | 54.0 | 1 | 5.2 |
| 5.0 | 20.4 | 22.3 | 25 | |||
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10