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Page 45 of 54
Issue 2128
Capacity
0 - 7,500 ft
(0 - 2,286 m)
7,501 - 10,000 ft
(2,286 - 3,048 m)
Natural to LP/Propane
LP/Propane to Natural
High Altitude
Natural Burner Orifice Kit
High Altitude
LP/Propane Burner
Orifice Kit
030
17H62+
N/A
N/A
17H90
045
11K50+
73W80*
51W01
11K45+
070
090
110
* Conversion requires installation of a gas valve regulator spring which is provided with the gas conversion Kit.
+ LP Kits include low line pressure switch.
Table 13.
Burner Orifice Conversion Kits at Varying Altitudes
Capacity
0 - 4500 ft
(0 - 1371m)
4501 - 7500 ft
(1371 - 2286m)
7501 - 10000 ft
(2286 - 3048m)
030
No Change
11U65
11U66
045
070
090
110
Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure switch from 0-4500 feet (0-
1371 m).
Table 14. Pressure Switch Requirements at Varying Altitudes