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TABLE 13
Manifold Pressure (Outlet) inches w.c.
Model Number Fuel
Altitude (feet)
0−2000 2001−4500 4501−5500 5501−6500 6501−7500 7501−10000
Low
Fire
High
Fire
Low
Fire
High
Fiire
Low
Fire
High
Fiire
Low
Fire
High
Fiire
Low
Fire
High
Fiire
Low
Fire
High
Fiire
045, 070, 090, 110,
135
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
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
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
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
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
Input
High Altitude
Orifice Kit
Natural Gas
Only
High Altitude Pressure Switch Kit
ORDER TWO EACH
LPG/Propane Kit LPG/Propane to
Natural Gas Kit
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.
−045 44W51 − − − − − − − − − 44W48 44W50 44W49 44W49 + 44W51
−070 44W51 − − − − − − 56M06 44W48 44W50 44W49 44W49 + 44W51
−071 47M82 24W49 24W49 26W83 44W48 44W50 44W49 44W49 + 47M82
−090 44W51 − − − 75M22 56M21 44W48 44W50 44W49 44W49 + 44W51
−091 47M82 26W85 26W85 26W86 44W48 44W50 44W49 44W49 + 47M82
−110 44W51 − − − − − − 75M22 44W48 44W50 44W49 44W49 + 44W51
−111 47M82 56M22 56M22 56M23 44W48 44W50 44W49 44W49 + 47M82
−135 44W51 − − − 56M93 56M93 44W48 44W50 44W49 44W49 + 44W51
1
High Altitude Orifice Kit is required and must be ordered separately for applications from 7501 to 10,000 ft.