507868-02
Page 40 of 48
Issue 2128
Table 14.
Burner Orifice Conversion Kits at Varying Altitudes
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
All
11K50+
73W80*
51W01
11K45+
* Conversion requires installation of a gas valve regulator spring which is provided with the gas
conversion Kit.
+ LP Kits include low line pressure switch.
Pressure Switch at Varying Altitudes
Capacity
0 - 4500 ft
(0 - 1371m)
4501 - 7500 ft
(1371 - 2286m)
7501 - 10000 ft
(2286 - 3048m)
045
No Change
11U65
11U66
070
090
Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure
switch from 0-4500 feet (0-1371 m).