TABLE 14
Manifold Pressure Settings at all Altitudes
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| Manifold | Manifold | Manifold | Supply Line | |||||
Unit | Gas | Pressure in.wg. | Pressure in.wg. | Pressure in.wg. | Pressure | |||||
0−4500 ft. | 4501−7500 ft.1 | 7501 − 10,000 ft.2 | in. w.g. | |||||||
Input | ||||||||||
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| Low Fire | High Fire | Low Fire | High Fire | Low Fire | High Fire | Min | Max | |
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| Natural | 1.7 | 3.5 | 1.6 | 3.4 | 1.7 | 3.5 | 4.5 | 13.0 | |
070 |
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LP/propane3 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 11.0 | 13.0 | ||
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| Natural | 1.7 | 3.5 | 1.5 | 3.2 | 1.7 | 3.5 | 4.5 | 13.0 | |
090 |
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LP/propane3 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 11.0 | 13.0 | ||
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| Natural | 1.7 | 3.5 | 1.5 | 3.2 | 1.7 | 3.5 | 4.5 | 13.0 | |
110 |
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LP/propane3 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 11.0 | 13.0 | ||
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| Natural | 1.7 | 3.5 | 1.5 | 2.8 | 1.7 | 3.5 | 4.5 | 13.0 | |
135 |
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LP/propane3 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 11.0 | 13.0 | ||
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1This is the only permissible derate for these units.
2Natural gas high altitude orifice kit required.
3A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.
NOTE − Units may be installed at altitudes up to 4500 ft. above sea level without modifications.
TABLE 15
Pressure Switch and Gas Conversion Kits at all Altitudes
| High Altitude Pressure Switch Kit | High Altitude | LP/Propane Gas Kit | LP/Propane to | ||||
Unit | Natural Gas Kit | Natural Kit | ||||||
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Input |
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0 − 4500 ft. | 4501 − 7500 ft. | 7501 − 10,000 ft. | 7501 − 10,000 ft. | 0 − 7500 ft | 7501 − 10,000 ft. | 0 − 7500 ft.Min | ||
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070 |
| 91W53 | 73W35 |
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090 |
| 91W53 | 73W35 |
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| No Change |
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| 73W37 | 77W07 | 77W11 | 77W09 | |
110 | 91W53 | 73W35 | ||||||
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135 |
| 73W33 | 73W34 |
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NOTE − A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.
Page 34
