Lennox ELITE Series Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Lennox Manuals
  4. Furnace
  5. Elite series
  6. Installation instructions manual

Lennox ELITE Series Installation Instructions Manual

Upflow / horizontal air discharge
Hide thumbs Also See for ELITE Series:
Table of Contents

Advertisement

Quick Links

© 2019 Lennox Industries Inc.
Dallas, Texas USA
C C C C
I I I I
HI
HI
Contents
Unit Dimensions - inches (mm) ......................................2
EL280UH(X)E Gas Furnace ...........................................3
Shipping and Packing List ..............................................3
Safety .............................................................................3
General ...........................................................................4
Combustion, Dilution, Ventilation Air...............................5
Setting Equipment ..........................................................8
Filters ............................................................................ 11
Duct System .................................................................12
Venting..........................................................................13
Gas Piping ....................................................................21
INSTALLATION
INSTRUCTIONS
EL280UH(X)E
ELITE
SERIES GAS FURNACE
®
UPFLOW / HORIZONTAL AIR DISCHARGE
507908-02
Supersedes 507908-01
06/2019
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.
IMPORTANT
DO NOT use the heat exchanger bracket to lift, drag
or pull the furnace to its installation location. Doing so
will loosen the bracket causing noise and or unsafe
operation.
Bracket
Electrical .......................................................................23
Integrated Control .........................................................30
Unit Start-Up .................................................................32
Gas Pressure Measurement.........................................33
Proper Combustion.......................................................34
High Altitude .................................................................34
Other Unit Adjustments.................................................35
Sequence of Operation.................................................35
Service..........................................................................37
Repair Parts List ...........................................................39
Start-Up & Performance Check List .............................40
Blower Data ..................................................................42
Page 1

Advertisement

Table of Contents
loading

Related Manuals for Lennox ELITE Series

Summary of Contents for Lennox ELITE Series

  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS EL280UH(X)E © 2019 Lennox Industries Inc. Dallas, Texas USA ELITE SERIES GAS FURNACE ® UPFLOW / HORIZONTAL AIR DISCHARGE 507908-02 Supersedes 507908-01 06/2019 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored.

  • Page 2: Unit Dimensions - Inches (Mm)

    Unit Dimensions - inches (mm) 3-1/8 (79) NOTE - 60C size units that require air volumes over 1800 cfm must have one of the following: 1. Single side return air and Optional Return Air Base with transition that must accommodate required 20 x 25 x 1 inch (508 x 635 x 25 mm) air filter to maintain proper velocity.

  • Page 3: El280Uh(X)E Gas Furnace

    CAUTION EL280UH(X)E Gas Furnace The EL280UH(X)E unit is shipped ready for installation As with any mechanical equipment, contact with sharp in the upflow or horizontal right position (for horizontal sheet metal edges can result in personal injury. Take left position the combustion air pressure switch must be care while handling this equipment and wear gloves and moved).

  • Page 4: Use Of Furnace As A Construction Heaterl

    Use of Furnace as Construction Heater When this furnace is used with cooling units, it shall be in- Lennox does not recommend the use of EL280UH(X)E stalled in parallel with, or on the upstream side of, cooling units as a construction heater during any phase of con- units to avoid condensation in the heating compartment.

  • Page 5: Combustion, Dilution, Ventilation Air

    • Do not install the furnace where drafts might blow CAUTION directly into it. This could cause improper combus- Insufficient combustion air can cause headaches, tion and unsafe operation. nausea, dizziness or asphyxiation. It will also cause • Do not block the furnace combustion air openings excess water in the heat exchanger resulting in with clothing, boxes, doors, etc.
  • Page 6 Though an area may appear to be confined, it might be Air from Inside necessary to bring in outdoor air for combustion if the If the confined space that houses the furnace adjoins a structure does not provide enough air by infiltration. If the space categorized as unconfined, air can be brought in by furnace is located in a building of tight construction with providing two permanent openings between the two spac-...
  • Page 7 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (Inlet Air from Crawlspace and Outlet Air to Ventilated Attic) CHIMNEY OR GAS VENT VENTILATION LOUVERS (Each end of attic) OUTLET WATER FURNACE HEATER INLET VENTILATION LOUVERS (For unheated crawl space) AIR FLOW NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch (645 ) per 4,000 Btu (1.17 kW) per hour of the total input rating of all equipment in the enclosure.

  • Page 8: Setting Equipment

    Upflow Applications Setting Equipmet Allow for clearances to combustible materials as indicated WARNING on the unit nameplate. Minimum clearances for closet or alcove installations are shown in figure 7. Do not install the furnace on its front or its back. Do Upflow Application Installation Clearances not connect the return air ducts to the back of the furnace.
  • Page 9 Return Air -- Upflow Applications Single Side Return Air Return air can be brought in through the bottom or either (with transition and filter) side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely.
  • Page 10 Pivot the bottom cap down to release the bottom applications. Order horizontal suspension kit (51W10) panel. Once the bottom panel has been removed, reinstall from Lennox, or use equivalent suspension method. the bottom cap. See figure 10 Allow for clearances to combustible materials as indicated on the unit nameplate.

  • Page 11: Filters

    Use screws and joint specifications provided by the filter manufacturer tape to seal the return air system to the furnace. against the data given in the appropriate Lennox In platform installations with bottom return air, the Product Specifications bulletin.

  • Page 12: Duct System

    Return Air Plenum Duct System NOTE - Return air must not be drawn from a roomwhere Use industry-approved standards (such as those pub- this furnace, or any other gas-fueled appliance (i.e., water lished by Air Conditioning Contractors of America or Amer- heater), or carbon monoxide producing device (i.e., wood ican Society of Heating, Refrigerating and Air Condition- fireplace) is installed.

  • Page 13: Venting

    If necessary reposition the combustion air inducer, pres- Venting sure switch and or make up box as needed per the follow- A 4-inch diameter flue transition is factory-installed on ing steps and see figures 17 through 22. the combustion air inducer outlet of all models. Figure 16 1 - Remove the four mounting screws which secure the shows the combustion air inducer as shipped from the fac- combustion air inducer / pressure switch assembly...
  • Page 14 HORIZONTAL LEFT POSITION HORIZONTAL RIGHT POSITION Top Vent Discharge Top Vent Discharge Vent Pipe Vent Pipe Pressure Switch Pressure Switch Flue Transition Flue Cover Plate Transition FLOW FLOW Collector Box Cover Plate Collector Box Make-Up Box Disconnect sure switch assembly. Remove pressure switch assembly (1 Make-Up Box screw) and cut wire tie to free pressure switch wires.
  • Page 15 The EL280UH(X)E series units are classified as fan-as- Venting Using a Masonry Chimney sisted Category I furnaces when vertically vented accord- The following additional requirements apply when a lined ing to the latest edition of National Fuel Gas Code (NFPA masonry chimney is used to vent this furnace.
  • Page 16 When inspection reveals that an existing chimney is not Common Venting Using Metal-Lined Masonry Chimney safe for the intended purpose, it shall be rebuilt to conform to nationally recognized standards, lined or relined with SEALED suitable materials, or replaced with a gas vent or chimney suitable for venting EL280UH(X)E series units.
  • Page 17 Common Venting Using Tile-Lined Interior Masonry Chimney and Combined Vent Connector MINIMUM LENGTH = AS SHORT AS PRACTICAL. INTERIOR TILE-LINED FOR MAXIMUM LENGTH SEE NOTE TO LEFT MASONRY CHIMNEY NOTE- Refer to provided venting tables for installations. NOTE - the chimney must be properly sized per provided venting tables or lined with listed metal lining system.
  • Page 18 16 - Vent connectors serving Category I appliances shall 20 - Do not install a manual damper, barometric draft not be connected to any portion of mechanical draft regulator or flue restrictor between the furnace and systems operating under positive pressure such as the chimney.
  • Page 19 TABLE 4 Vent Connector Capacity Type B Double-Wall Vents with Type B Double-Wall Connectors Serving Two or More Category I Appliances Vent and Connector Diameter - D (inches) Height Lateral 3 inch 4 inch 5 inch 6 inch Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) TABLE 5...
  • Page 20 Removal of the Furnace from Common Vent 3 - Close all building doors and windows and all doors between the space in which the appliances In the event that an existing furnace is removed from a remaining connected to the common venting system venting system commonly run with separate gas applianc- are located and other spaces of the building.

  • Page 21: Gas Piping

    2 - When connecting the gas supply piping, consider Gas Piping factors such as length of run, number of fittings, and Gas supply piping should not allow more than 0.5”W.C. furnace rating to avoid excessive pressure drop. drop in pressure between gas meter and unit. Supply gas Table 6 lists recommended pipe sizes for typical pipe must not be smaller than unit gas connection.
  • Page 22 Left Side Piping MANUAL (Standard) MAIN SHUT-OFF AUTOMATIC MANUAL VALVE GAS VALVE MAIN SHUT-OFF (With 1/8 in. NPT AUTOMATIC VALVE Plugged Tap GAS VALVE (With 1/8 in. NPT Shown) Plugged Tap Shown) GROUND JOINT UNION GROUND JOINT UNION DRIP LEG Right Side Piping FIELD (Alternate)

  • Page 23: Electrical

    Leak Check WARNING After gas piping is completed, carefully check all piping Fire Hazard. Use of aluminum wire with this product connections (factory- and field-installed) for gas leaks. may result in a fire, causing property damage, Use a leak detecting solution or other preferred means. severe injury or death.
  • Page 24 Complete the wiring connections to the equipment. Use Generator Use - Voltage Requirements the provided unit wiring diagram and the field wiring dia- The following requirements must be kept in mind when gram shown in figure 30. Use 18-gauge wire or larger that specifying a generator for use with this equipment: is suitable for Class II rating for thermostat connections.
  • Page 25 TABLE 7 Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 1 Heat / 1 Cool FURNACE OUTDOOR T'STAT TERM.
  • Page 26 TABLE 7 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 2 Heat / 2 Cool FURNACE OUTDOOR T'STAT TERM.
  • Page 27 TABLE 7 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Wiring Connections Thermostat Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
  • Page 28 TABLE 7 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
  • Page 29 EL280UH(X)E Schematic Wiring Diagram FIGURE 30 Page 29...

  • Page 30: Integrated Control

    Integrated Control 24VAC Indoor Ignitor and Combustion Blower Terminals Air Inducer Neutrals Flame Sense S4 DIP Switches Diagnostic Push Button On Board Links 3/16” QUICK CONNECT TERMINALS THERMOSTAT CONNECTIONS (TB1) DS = DEHUMIDIFICATION SIGNAL FLAME SENSE SIGNAL W2 = HEAT DEMAND FROM 2ND STAGE T/STAT HI Cool 24VAC W1 = HEAT DEMAND FROM 1ST STAGE T/STAT HI HEAT 24VAC...
  • Page 31 The blower off delay affects comfort and is adjustable to Integrated Control DIP Switch Settings satisfy individual applications. Adjust the blower off de- EL280UH(X)E units are equipped with a two-stage inte- lay to achieve a supply air temperature between 90° and grated control.

  • Page 32: Unit Start-Up

    WARNING On-Board Links and Diagnostic Push Button (Figure 31) If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance WARNING before shutting off electrical supply. Carefully review configuration information CAUTION provided.

  • Page 33: Gas Pressure Measurement

    2 - Are access panels securely in place? NOTE - Pressure test adapter kit (10L34) is available from Lennox to facilitate manifold pressure measurement. 3 - Is the main disconnect switch closed? 1 - Connect test gauge to manifold pressure tap (figure 4 - Is there a blown fuse or tripped circuit breaker? 32) gas valve.

  • Page 34: Proper Combustion

    Proper Combustion High Altitude The manifold pressure may require adjustment and com- bustion air pressure switch may need replacing to ensure Furnace should operate minimum 15 minutes with correct proper combustion at higher altitudes. Refer to table 13 manifold pressure and gas flow rate before checking com- for manifold pressure and table 14 for pressure switch bustion.

  • Page 35: Other Unit Adjustments

    Other Unit Adjustments Heating Sequence of Operation Primary and Secondary Limits Electronic Ignition The primary limit is located on the heating compartment The two-stage, variable speed integrated control used in vestibule panel. The secondary limits (if equipped) are lo- EL280UH(X)E units has an added feature of an internal cated in the blower compartment, attached to the back Watchguard control.
  • Page 36 6 - At the end of the recognition delay, the integrated 2 - Once the control receives a signal that the low control energizes the combustion air inducer at high pressure switch has closed, the combustion air speed. The control also checks the high fire (second inducer begins a 15-second pre-purge in low speed.

  • Page 37: Service

    Perform a general system test. Turn on the furnace to At the beginning of each heating season, and to comply check operating functions such as the start-up and shut- with the Lennox Limited Warranty, your system should be off operation. checked as follows:...
  • Page 38 Cleaning the Burners 4 - To clean burners, run a vacuum cleaner with a soft brush attachment over the face of burners. Visually NOTE - Use papers or protective covering in front of the inspect inside the burners and crossovers for any furnace during cleaning.

  • Page 39: Repair Parts List

    Repair Parts List The following repair parts are available through indepen- Heating Parts dent Lennox dealers. When ordering parts, include the Flame sensor complete furnace model number listed on the CSA Inter- Heat exchanger assembly national nameplate -- Example: EL280UH45E36A-01. All...

  • Page 40: Start-Up & Performance Check List

    Start-Up & Performance Check List UNIT SET UP (typical) Unit Model Number_______________ Serial Number___________________ SUPPLY Line Voltage upflow furnace shown Gas Supply Pressure Filter RETURN RETURN DUCT SYSTEM GAS SUPPLY SUPPLY AIR DUCT LP/Propane Gas Natural Gas Sealed Piping Connections Tight Insulated (if necessary) Leak Tested Registers Open and Unobstructed...
  • Page 41 UNIT OPERATION (typical) Combustion CO SUPPLY Thermostat Gas Manifold Pressure Temperatures upflow furnace shown Filter Blower Motor Amps Duct Static RETURN RETURN COOLING MODE HEATING MODE INDOOR BLOWER AMPS______ GAS MANIFOLD PRESSURE “W.C._____ TEMPERATURE DROP COMBUSTION SAMPLE CO CO PPM_______ ______ Return Duct Temperature _________ Supply Duct Temperature...

  • Page 42: Blower Data

    BLOWER DATA EL280UH045E36A PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External High Medium-High Medium Medium-Low Static Pressure (Black) (Brown) (Blue) (Yellow) (Red) in. w.g. Watts Watts Watts Watts Watts 0.00 1500 1220 1050 0.10 1485 1200 1025 0.20 1460...
  • Page 43 BLOWER DATA EL280UH090E48B PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External High Medium-High Medium Medium-Low Static Pressure (Black) (Brown) (Blue) (Yellow) (Red) in. w.g. Watts Watts Watts Watts Watts 0.00 1800 1555 1425 1370 1240 0.10 1765 1525 1390...
  • Page 44 EL280UH110E60C PERFORMANCE (Less Filter) Air Volume / Watts at Different Blower Speeds Single Side Return Air − Air volumes in bold (over Bottom Return Air, Side Return Air from Both Sides or 1800 cfm) require Optional Return Air Base and field External Return Air from Bottom and One Side.

This manual is also suitable for:

El280uheEl280uhxe

Table of Contents