PHYSICAL DATA (cont)
UNIT SIZE 581B |
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| 036 |
| 048 |
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| 060 | 072 | ||||
FURNACE SECTION |
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Rollout Switch Cutout Temp (F)† |
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| 195 |
| 195 |
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| 195 | 195 | ||||
Burner Orifice Diameter (in. ...drill size)** |
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Natural Gas — Std | 071/072 | .113...33 | .113...33 |
| .113...33 | .113...33 | |||||||
| 114/115 | .113...33 | .113...33 |
| .113...33 | .113...33 | |||||||
| 149/150 |
| — | .129...30 |
| .129...30 | .129...30 | ||||||
| 060N | .102...38 | .102...38 |
| .102...38 | — |
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| 090N | .102...38 | .102...38 |
| .102...38 | — |
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| 120N |
| — | .116...32 |
| .116...32 | — |
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Liquid Propane — Alt†† | 071/072 | .089...43 | .089...43 |
| .089...43 | .089...43 | |||||||
| 114/115 | .089...43 | .089...43 |
| .089...43 | .089...43 | |||||||
| 149/150 |
| — | .102...38 |
| .102...38 | .102...38 | ||||||
| 060N | .082...45 | .082...45 |
| .082...45 | — |
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| 090N | .082...45 | .082...45 |
| .082...45 | — |
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Thermostat Heat Anticipator Setting (amps) | 120N |
| — | .094...42 |
| .094...42 | — |
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| .14 |
| .14 |
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| .14 |
| .14 |
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(208/230/460/575 V) |
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Gas Input (Btuh) |
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First Stage/Second Stage | 071II | 72,000 | 72,000 |
| 72,000 | — |
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| 114II |
| — |
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| 149II |
| — |
| — |
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| 072*** | 50,000/ | 72,000 | 50,000/ | 72,000 |
| 50,000/ | 72,000 | 50,000/ | 72,000 | |||
| 115*** | 82,000/115,000 | 82,000/115,000 |
| 82,000/115,000 | 82,000/115,000 | |||||||
| 150*** |
| — | 120,000/150,000 |
| 120,000/150,000 | 120,000/150,000 | ||||||
| 060N††† | 60,000 | 60,000 |
| 60,000 | — |
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| 090N††† | 90,000 | 90,000 |
| 90,000 | — |
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| 120N††† |
| — |
| — |
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Efficiency (Thermal) (%) | 071 |
| 82 |
| 82 |
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| 82 |
| — |
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| 114 |
| 80 |
| 81 |
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| 81 |
| — |
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| 149 |
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| 80 |
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| 80 |
| — |
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| 072 |
| 82 |
| 82 |
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| 82 |
| 82 |
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| 115 |
| 80 |
| 81 |
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| 81 |
| 81 |
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| 150 |
| — |
| 80 |
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| 80 |
| 80 |
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| 060N |
| 81 |
| 81 |
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| 81 |
| — |
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| 090N |
| 81 |
| 81 |
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| 81 |
| — |
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| 120N |
| — |
| 82 |
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| 82 |
| — |
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Temperature Rise Range | 071 |
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| 114 |
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| 149 |
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| 072 |
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| 115 |
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| 150 |
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| 060N |
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| 090N |
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Manifold Pressure (in. wg) | 120N |
| — |
| — |
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Natural Gas — Std |
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| 3.5 |
| 3.5 |
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| 3.5 |
| 3.5 |
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Liquid Propane — Alt†† |
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| 3.5 |
| 3.5 |
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| 3.5 |
| 3.5 |
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Maximum Static Pressure (in. wg) |
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| 1.0 |
| 1.0 |
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| 1.0 |
| 1.0 |
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Field Gas Connection Size (in.) |
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| 1/2 |
| 1/2 |
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| 1/2 |
| 1/2 |
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Standard Compressor Internal Relief |
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| 450 ± 50 |
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Cutout |
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| 428 |
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Reset (Auto.) |
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| 320 |
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(Liquid Line) (psig) |
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Cutout |
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| 7 ± 3 |
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Reset (Auto.) |
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| 22 ± 5 |
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FREEZE PROTECTION THERMOSTAT |
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Opens (F) |
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| 30 ± 5 |
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Closes (F) |
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| 45 ± 5 |
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| Cleanable |
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Quantity...Size (in.) |
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| 1...20 x 24 x 1 |
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| Throwaway |
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Quantity...Size (in.) |
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| 2...16 x 25 x 2 |
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LEGEND
Bhp — Brake Horsepower
*Single phase/three phase.
†Indicates automatic reset.
**581B 072 unit size
††An LP kit is available as an accessory. llCalifornia compliant
†††California SCAQMD compliant Low NOx models have combustion prod- ucts that are controlled to 40 nanograms per joule or less.
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