BOILERS FOR USE AT HIGH ALTITUDE - UNITED STATES INSTALLATIONS

Model 90-75 propane (LP) units only at altitudes above 5,000 ft., install 90-75 High Altitude Orifice Kit #550002629*.

For all other altitudes use sea level orifice

Table 3 - 90 - 50/75 SERIES 2 PROPANE GAS

MODEL 90-50

 

Stock Factory

 

 

Btu Value of Propane Gas++

 

 

Settings

2300

 

2350

2400

 

2450

2500

Altitude in Ft.

0-5,000

 

 

 

5,000-10,000

 

 

Normal Input (MBH)

50

–

 

–

–

 

–

–

Manifold Pressure In W.C.

2.5

3

 

3

2.5

 

2.5

2.5

Orifice

43331095

 

 

 

43331095

 

 

 

 

MODEL 90-75*

 

 

 

 

 

 

Stock Factory

 

 

Btu Value of Propane Gas++

 

 

Settings

2300

 

2350

2400

 

2450

2500

Altitude in Ft.

0-5,000

 

 

 

5,000-10,000

 

 

Normal Input (MBH)

75

–

 

–

–

 

–

–

Manifold Pressure In W.C.

2.5

3.5

 

3.5

3.5

 

3

3

Orifice

43331093

 

 

 

43331096*

 

 

 

*For model 90-75 Propane units only at altitudes above 5,000 ft., install 90-75 High Altitude Orifice Kit #550002629 For all other altitudes use sea level orifice.

++Contact local gas utility or distributor for Btu value of gas.

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Lennox International Inc Gas-Fired Hot Water Boiler, GWB9-075IH-2 90 50/75 Series 2 Propane GAS, 43331093 43331096
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GWB9-050IH-2, GWB9-100IH-2, GWB9-075IH-2, Gas-Fired Hot Water Boiler specifications

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