Lennox EL280UH070P24A Manuals

Page 1 INSTALLATION INSTRUCTIONS EL280UH 507333-01 11/2017 Supersedes 05/2016 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in man- uals, be alert to the potential for personal injury or death CAUTION As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier. © 2017 Lennox Industries Inc. Dallas, Texas USA ELITE ® SERIES GAS FURNACE UPFL0W / HORIZONTAL AIR DISCHARGE Contents Unit Dimensions .............................................................2 EL280UH Gas Furnace ..................................................3 Shipping and Packing List ..............................................3 Safety Information ..........................................................3 Use of Furnace as Construction Heater .........................4 General ...........................................................................4 Combustion, Dilution & Ventilation Air ............................5 Setting Equipment .........................................................8 Filters ............................................................................ 11 Duct System .................................................................12 Venting..........................................................................13 Gas Piping ....................................................................21 Electrical .......................................................................23 Integrated Control .........................................................28 Unit Start Up .................................................................29 Gas Pressure Adjustment .............................................30 Proper Combustion.......................................................31 High Altitude .................................................................31 Other Unit Adjustments.................................................32 Sequence of Operation.................................................32 Service..........................................................................34 Repair Parts List ...........................................................36 Start-Up & Performance Checl List ..............................37 OFF ON C C HI I I LO HI UPFLOW HORIZONTAL LEFT HORIZONTAL RIGHT AIR FLOW AIR FLOW AIR FLOW

Page 1 © 2012 Lennox Industries Inc. Corp. 1138−L11 EL280UH(X) Service Literature Revised 05/2012 EL280UH(X) SERIES UNITS EL280UH(X) series units are 80% efficiency gas furnaces used for upflow or horizontal applications only, manufac- tured with Lennox Duralok heat exchangers formed of aluminized steel. EL280UH(X) units are available in heat- ing capacities of 66,000 to 132,000 Btuh and cooling ap- plications up to 5 tons. Product Specifications manual for proper sizing. Units are factory equipped for use with natural gas. Kits are available for conversion to LPG operation. EL280UH(X) model units are equipped with the SureLight® two−stage in- tegrated control. EL280UH(X) unit meets the California Ni- trogen Oxides (NOx) Standards and California Seasonal Ef- ficiency requirements. All units use a redundant gas valve to assure safety shut−off as required by C.S.A. All specifications in this manual are subject to change. Pro- cedures outlined in this manual are presented as a recom- mendation only and do not supersede or replace local or state codes. In the absence of local or state codes, the guidelines and procedures outlined in this manual (except where noted) are recommendations only and do not consti- tute code. TABLE OF CONTENTS Specifications Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Blower Data Page 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I Unit Components Page 8 . . . . . . . . . . . . . . . . . . . . . . . . II Installation Page 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III Start Up Page 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV Heating System Service Checks Page 19 . . . . . . . . . V Typical Operating Characteristics Page 22 . . . . . . . . . VI Maintenance Page 23 . . . . . . . . . . . . . . . . . . . . . . . . . . VII Wiring and Sequence of Operation Page 26 . . . . . . VIII Field Wiring and DIP Switch Settings Page 28 . . . . IX Troubleshooting Page 30 . . . . . . . . . . . . . . . . . . . . . . . WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, person- al injury or loss of life. Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier. WARNING Sharp edges. Be careful when servicing unit to avoid sharp edges which may result in personal injury.