3-Pipe Hot Gas Defrost
The hot gas defrost unit coolers conforms to the standard
valve assembly, an electrical control to terminate the defrost, and a hot gas solenoid valve. The
check valve assembly transports the hot gas between the drain pan loop and the sideport distributor of the coil. The check valve assembly kit
is available for
The electrical control option includes an adjustable defrost termination and fan delay control (DTFD) which is standard. An optional
(2) control electrical system is available with one adjustable control for defrost termination (DT)
and one fixed control for the fan delay (FD) for an additional cost. For both the DTFD and DT adjustable controls, the remote bulb position is
with the bulb strapped to the suction line to insure a complete defrost. The remote bulb is positioned
by the installer. The hot gas solenoid valve must be
ordered separately and will be
The liquid line is designed for the body styles of the Sporlan SQE, SBF, EG and the Alco HFESC thermostatic expansion valves. The thermostatic expansion valve needs to be selected by the sales engineer. In a typical 3- pipe, multiple evaporator system, the compressor discharge defrosts the evaporator. The liquid/vapor mixture of refrigerant after defrost, however, returns to the common suction line of the system. In order to provide sufficient
GLC 6 FPI
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| TXV Liquid Line |
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| TXV Liquid Line |
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SQE/SBF | EG | HFESC | SQE/SBF | EG | HFESC |
50169410
50169411
50169412
50169413
50169414
50169415
50169416
50169417
50169418
52733901
52733902
52733903
52733904
52733905
52733906
52733907
52733908
52733909
GLC 4 FPI
235
50169410
50169411
50169412
50169413
50169414
50169415
50169416
50169417
50169418
52733901
52733902
52733903
52733904
52733905
52733906
52733907
52733908
52733909
For hot gas models with the |
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hot gas loop drain pan only | Drain Pan Loop Check Valve Kit | Drain Pan Loop Check Valve Kit | |
When using the hot |
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GLC 6 FPI |
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gas units with a hot |
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gas loop drain pan on | 50169504 | 52739601 | |
0°F applications and | 50169505 | 52739602 | |
below, an insulated | 50169506 | 52739603 | |
drain pan is required. |
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GLC 4 FPI |
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| 50169504 | 52739601 | |
| 50169505 | 52739602 | |
| 235 | 50169506 | 52739603 |
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