Lennox International Inc EL280UH Manifold Pressure Settings at all Altitudes

Page 34

TABLE 14

Manifold Pressure Settings at all Altitudes

 

 

Manifold

Manifold

Manifold

Supply Line

Unit

Gas

Pressure in.wg.

Pressure in.wg.

Pressure in.wg.

Pressure

0−4500 ft.

4501−7500 ft.1

7501 − 10,000 ft.2

in. w.g.

Input

 

 

 

 

 

 

 

 

 

 

 

Low Fire

High Fire

Low Fire

High Fire

Low Fire

High Fire

Min

Max

 

 

 

 

 

 

 

 

 

 

 

Natural

1.7

3.5

1.6

3.4

1.7

3.5

4.5

13.0

070

 

 

 

 

 

 

 

 

 

LP/propane3

4.9

10.0

4.9

10.0

4.9

10.0

11.0

13.0

 

 

Natural

1.7

3.5

1.5

3.2

1.7

3.5

4.5

13.0

090

 

 

 

 

 

 

 

 

 

LP/propane3

4.9

10.0

4.9

10.0

4.9

10.0

11.0

13.0

 

 

Natural

1.7

3.5

1.5

3.2

1.7

3.5

4.5

13.0

110

 

 

 

 

 

 

 

 

 

LP/propane3

4.9

10.0

4.9

10.0

4.9

10.0

11.0

13.0

 

 

Natural

1.7

3.5

1.5

2.8

1.7

3.5

4.5

13.0

135

 

 

 

 

 

 

 

 

 

LP/propane3

4.9

10.0

4.9

10.0

4.9

10.0

11.0

13.0

 

1This is the only permissible derate for these units.

2Natural gas high altitude orifice kit required.

3A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.

NOTE − Units may be installed at altitudes up to 4500 ft. above sea level without modifications.

TABLE 15

Pressure Switch and Gas Conversion Kits at all Altitudes

 

High Altitude Pressure Switch Kit

High Altitude

LP/Propane Gas Kit

LP/Propane to

Unit

Natural Gas Kit

Natural Kit

 

 

 

 

 

Input

 

 

 

 

 

 

 

0 − 4500 ft.

4501 − 7500 ft.

7501 − 10,000 ft.

7501 − 10,000 ft.

0 − 7500 ft

7501 − 10,000 ft.

0 − 7500 ft.Min

 

 

 

 

 

 

 

 

 

070

 

91W53

73W35

 

 

 

 

 

 

 

 

 

 

 

 

090

 

91W53

73W35

 

 

 

 

 

No Change

 

 

73W37

77W07

77W11

77W09

110

91W53

73W35

 

 

 

 

 

 

 

 

 

 

 

 

 

135

 

73W33

73W34

 

 

 

 

 

 

 

 

 

 

 

 

NOTE − A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.

Page 34

Image 34
Contents Installation Instructions EL280UH Table of ContentsUnit Dimensions − inches mm Supply AIR OpeningParts Arrangement EL280UH Gas Furnace Safety InformationShipping and Packing List Use of Furnace as Construction Heater GeneralCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space Setting Equipment Return Air Bracket Filters Duct SystemVenting Upflow PositionHorizontal Left Position Horizontal Right PositionVent Connection Upflow and Horizontal Position Common Venting Using Metal−Lined Masonry Chimney −1/2 To these instructions and the provided venting tables. If Feet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard Gas Piping Leum gasesHorizontal Applications Possible Gas Piping Configurations Electrical Interior MAKE−UP BOX InstallationElectrostatic Discharge ESD Page Field Wiring Applications OFF EL280UH Schematic Wiring Diagram Typical EL280UH Field Wiring Diagram TWO−STAGE Integrated ControlIntegrated Control For Your Safety Read Before Lighting Unit Start−UpProper Combustion Gas Pressure AdjustmentHigh Altitude Manifold Pressure Settings at all Altitudes Other Unit Adjustments Heat FAN-OFF Time in SecondsHeating Sequence of Operation Blower Data Pressure Bottom and One Side Service Electrical SHOCK, Fire Or Explosion HazardEL280UH BURNER, Combustion AIR Inducer Assembly Heat Exchanger RemovalPage Planned Service Repair Parts ListFlash Code Status / Error Description Integrated Control Diagnostic CodesLED Troubleshooting Heating Sequence of Operation On NextHeating Sequence of Operation U1.40 microamps Or Heat Demand is SATISFIED. a Five Troubleshooting Cooling Sequence of Operation Cooling Sequence of OperationTroubleshooting Continuous Fan Sequence of Operation Continuous LOW Speed FAN Sequence of OperationStart−Up & Performance Check List Unit Operation Cooling ModeTemperature Rise Drain Line
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Elite Series Gas Furnace Upflow/Horizontal Air Discharge, EL280UH specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, providing innovative solutions for both residential and commercial environments. One of their notable products is the EL280UH, a high-efficiency gas furnace designed to offer optimal comfort while minimizing energy consumption.

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