Installation and Operations Manual
Compressors
The majority of the Heatcraft Parallel systems incorporate the Copeland compressor. Other brand compressors are available upon customer request. The compressors are solid mounted to a base frame or mounted on the refrigerant receiver. All reciprocating compressors incorporate oil floats. Crankcase heaters will be installed and wired. Cylinder head cooling fans will be installed on all low temperature reciprocating systems or as directed by the specific compressor manufacturer. A high pressure cutout and oil failure control are installed and wired for each compressor.
Many compressors are available with unloading for capacity control. The unloading of a compressor adds many capacity steps to those normally available to an electronic controller. Usually, the more steps available the better the load can be matched.
Copeland Compressors
Table 8. 3D/4D/6D Solid State Modules
Control Voltage
Model | Copeland |
| Copeland | T.I. |
Kit |
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Number |
| Number | Number | |
Number |
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| 115 - 230 Volts |
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4D/6D
Table 9. Typical Voltage Ranges
Voltage | 60 Hertz Rating |
| 50 Hertz Rating |
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Code | Rating | Min. | Max. | Rating | Min. | Max. |
B | 207 | 253 | - | - | - | |
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C | 187 | 253 | 180 | 240 | ||
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D | 414 | 506 | 342 | 462 | ||
E | 518 | 633 | 450 | 550 | ||
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K | 187 | 506 | 180 | 440 | ||
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M | - | - | - | 342 | 462 | |
N | 207 | 506 | 180 | 440 | ||
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U | 180 | 220 | - | - | - | |
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Refer to voltage rating of specific models
Table 10. Unloader Factors
Model |
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| Factors |
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3D |
| See Copeland Application Bulletin Number AE |
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| Moduload - Capacity Control for 3D Compressors |
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| Full Load |
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| One Bank |
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| Two Bank |
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| Unloading |
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| Unloading |
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| Performance | HT |
| MT | LT | HT |
| MT |
| LT |
| HT |
| MT |
| LT |
| CAPACITY | 1.00 |
| 1.00 | 1.00 | .50 |
| .50 |
| .50 |
| - |
| - |
| - |
4D | POWER | 1.01 |
| 1.03 | 1.02 | .56 |
| .56 |
| .56 |
| - |
| - |
| - |
| AMPS | 1.01 |
| 1.03 | 1.02 | .60 |
| .60 |
| .74 |
| - |
| - |
| - |
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| CAPACITY | 1.00 |
| 1.00 | 1.00 | .70 |
| .70 |
| .70 |
| .36 |
| .36 |
| .36 |
6D | POWER | 1.01 |
| 1.03 | 1.02 | .70 |
| .71 |
| .72 |
| .40 |
| .42 |
| .43 |
| AMPS | 1.03 |
| 1.04 | 1.02 | .75 |
| .77 |
| .84 |
| .55 |
| .60 |
| .72 |
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Multiply compressor rating data by above factors when used with blocked suction unloading
Refer to Copeland AE
20 | Part # 25000102 |