Table 3 — 38HDR Electrical Data
38HDR | VOLTAGE RANGE* | COMPRESSOR | OUTDOOR FAN MOTOR | MIN CKT | FUSE/HACR | ||||||
UNIT SIZE | Min | Max | RLA | LRA | FLA | NEC Hp | kW Out | AMPS | BKR AMPS | ||
| |||||||||||
018 | 187 | 253 | 10.0 | 48.0 | 0.80 | 0.125 | 0.09 | 13.3 | 20 | ||
024 | 187 | 253 | 14.3 | 58.3 | 0.80 | 0.125 | 0.09 | 18.7 | 30 | ||
030 | 187 | 253 | 15.7 | 64.0 | 1.45 | 0.25 | 0.19 | 21.1 | 35 | ||
| 187 | 253 | 15.7 | 77.0 | 1.45 | 0.25 | 0.19 | 21.1 | 35 | ||
036 | 187 | 253 | 10.4 | 88.0 | 1.45 | 0.25 | 0.19 | 14.5 | 20 | ||
| 414 | 506 | 6.3 | 38.0 | 0.80 | 0.25 | 0.19 | 8.7 | 15 | ||
| 187 | 253 | 24.3 | 117.0 | 1.45 | 0.25 | 0.19 | 31.8 | 55 | ||
048 | 187 | 253 | 15.6 | 83.1 | 1.45 | 0.25 | 0.19 | 21.0 | 35 | ||
| 414 | 506 | 6.9 | 41.0 | 0.80 | 0.25 | 0.19 | 9.4 | 15 | ||
| 187 | 253 | 29.4 | 134.0 | 1.45 | 0.25 | 0.19 | 38.2 | 65 | ||
060 | 187 | 253 | 17.8 | 110.0 | 1.45 | 0.25 | 0.19 | 23.7 | 40 | ||
| 414 | 506 | 8.6 | 52.0 | 0.80 | 0.25 | 0.19 | 11.6 | 20 |
| LEGEND |
FLA | — Full Load Amps |
HACR | — Heating, Air Conditioning, Refrigeration |
LRA | — Locked Rotor Amps |
NEC | — National Electrical Code |
RLA | — Rated Load Amps (Compressor) |
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 percentage of voltage imbalance:
*Permissible limits of the voltage range at which unit will operate satisfactorily.
% Voltage Imbalance = 100 x
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NOTES:
1.Control circuit is 24 v on all units and requires an external power source.
2.All motors and compressors contain internal overload protection.
3.In compliance with NEC (U.S.A. Standard) requirements for mul- timotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.
4.Motor RLA values are established in accordance with UL (Under- writers’ Laboratories) Standard 465 (U.S.A. Standard).
5.
6.Unbalanced
Never operate a motor where a phase imbalance in supply volt- age is greater than 2%. Use the following formula to determine the percentage of voltage imbalance:
=100 x max voltage deviation from average voltage average voltage
EXAMPLE: Supply voltage is
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
457
=1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable of 2%
IMPORTANT: Contact your local electric utility company immedi- ately if the supply voltage phase imbalance is more than 2%.
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