TABLE 13
Manifold Pressure (Outlet) inches w.c.
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Model Number | Fuel | 0−2000 | 2001−4500 | 4501−5500 | 5501−6500 | 6501−7500 | 7501−10000 | |||||||
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| Low | High | Low | High | Low | High | Low |
| High | Low | High | Low | High |
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| Fire | Fire | Fire | Fiire | Fire | Fiire | Fire |
| Fiire | Fire | Fiire | Fire | Fiire |
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045, 070, 090, 110, | Natural | 1.7 | 3.5 | 1.7 | 3.5 | 1.7 | 3.5 | 1.7 |
| 3.5 | 1.7 | 3.5 | 1.7 | 3.5 |
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135 | Propane | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 |
| 10.0 | 4.9 | 10.0 | 4.9 | 10.0 |
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071, 091, 111 | Natural | 1.7 | 3.5 | 1.7 | 3.4 | 1.7 | 3.3 | 1.7 |
| 3.2 | 1.7 | 3.1 | 1.7 | 3.5 |
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Propane | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | 4.9 |
| 10.0 | 4.9 | 10.0 | 4.9 | 10.0 | |
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High Altitude Information
NOTE − In Canada, certification for installations at eleva- tions over 4500 feet (1372 m) is the jurisdiction of local au- thorities.
The manifold pressure may require adjustment to ensure proper operation at higher altitudes. Refer to table 13 for proper manifold pressure settings at varying altitudes.
Refer to table 14 for required pressure switch changes and conversion kits at varying altitudes.
The combustion air pressure switches are factory−set and require no adjustment.
NOTE − A natural to L.P. propane gas changeover kit is nec- essary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.
TABLE 14
Conversion Kit Requirements
| High Altitude | High Altitude Pressure Switch Kit | LPG/Propane Kit | LPG/Propane to | ||||||||
| Orifice Kit | ORDER TWO EACH |
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| Natural Gas Kit | ||||||
Input | Natural Gas |
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Only |
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| 7501−10,000 ft. | 2000−4500 ft. |
| 4501−7500 ft. |
| 7501−10,000 ft. | 0−7500 ft. |
| 7501−10,000 ft. | 0−7500 ft. |
| 1 7501−10,000 ft. |
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−045 | 44W51 | − − − |
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| − − − | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 44W51 |
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−070 | 44W51 | − − − |
| − − − |
| 56M06 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 44W51 |
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−071 | 47M82 | 24W49 |
| 24W49 |
| 26W83 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 47M82 |
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−090 | 44W51 | − − − |
| 75M22 |
| 56M21 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 44W51 |
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−091 | 47M82 | 26W85 |
| 26W85 |
| 26W86 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 47M82 |
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−110 | 44W51 | − − − |
| − − − |
| 75M22 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 44W51 |
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−111 | 47M82 | 56M22 |
| 56M22 |
| 56M23 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 47M82 |
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−135 | 44W51 | − − − |
| 56M93 |
| 56M93 | 44W48 |
| 44W50 | 44W49 |
| 44W49 + 44W51 |
1High Altitude Orifice Kit is required and must be ordered separately for applications from 7501 to 10,000 ft.
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