Table of Contents
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© 2021 Lennox Industries Inc.
Dallas, Texas USA
Contents
Unit Dimensions .............................................................2
EL180UHN Gas Furnace................................................3
Shipping and Packing List ..............................................3
Safety .............................................................................3
Use of Furnace as a Construction Heaterl .....................4
General ...........................................................................5
Combustion, Dilution, Ventilation Air...............................5
Setting Equipment ..........................................................8
Filters ............................................................................ 11
Duct System ................................................................. 11
Venting..........................................................................14
INSTALLATION
INSTRUCTIONS
EL180UHNE
ELITE
SERIES GAS FURNACE
®
UPFLOW / HORIZONTAL AIR DISCHARGE
507647-04
08/2021
Supersedes 507646-03
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 tubes to lift, drag or
pull the furnace to its installation location.
Doing so may damage or bend the tubes causing noise
and or unsafe operation.
HeatExchanger Tubes
Gas Piping ....................................................................18
Electrical .......................................................................20
Integrated Control .........................................................24
Unit Start-Up .................................................................25
Gas Pressure Measurement.........................................26
Proper Combustion.......................................................26
High Altitude .................................................................26
Other Unit Adjustments.................................................27
Service..........................................................................28
Start-Up Checklist.........................................................30
Blower Data ..................................................................33
Page 1
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Summary of Contents for Lennox EL180UHN
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS EL180UHNE © 2021 Lennox Industries Inc. Dallas, Texas USA ELITE SERIES GAS FURNACE ® UPFLOW / HORIZONTAL AIR DISCHARGE 507647-04 08/2021 Supersedes 507646-03 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
Unit Dimensions - inches (mm) ³ GAS PIPING INLET 3-1/8 (79) “A” Width Cabinet NOTE - 60C size units that require air volumes over (Left Side Only) 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: El180Uhn Gas Furnace
Certifications EL180UHNE Gas Furnace EL180UHNE units are CSA International certified to ANSI The EL180UHNE unit is shipped ready for installation in Z21.47.In the USA, installation of gas furnaces must con- the upflow or horizontal position fueled by natural gas. The form with local building codes. -
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 Lennox does not recommend the use of EL180UHNE installed in parallel with, or on the upstream side of, cool- units as a construction heater during any phase of con- ing units to avoid condensation in the heating compart- struction. -
Page 5: General
CAUTION General These instructions are intended as a general guide and do Do not install the furnace in a corrosive or contaminated not supersede local codes in any way. Consult authorities atmosphere. Meet all combustion and ventilation air having jurisdiction before installation. requirements, as well as all local codes. - Page 6 Though an area may appear to be unconfined, it might Air from Inside be 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.
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Page 8: Setting Equipment
Upflow Applications Setting Equipment 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 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.
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Page 11: Filters
Before using any filter with this system, check the specifications provided by the filter manufacturer against the data given in the appropriate Lennox Product Specifications bulletin. Additional information is provided ENTRY VENT in Service and Application Note ACC002 (August 2000). - Page 12 SUPPLY Install self tapping screws to seal any potential air leaks SUPPLY HORIZONTAL UNIT UPFLOW UNIT FIGURE 14 Return Air Plenum The venting tables in this manual were extracted from the National Fuel Gas Code (NFPA 54 / ANSI Z223.1) and are NOTE - Return air must not be drawn from a roomwhere provided as a guide for proper vent installation.
- Page 13 VENT CONNECTION UPFLOW AND HORIZONTAL POSITION “DISCONNECTED VENT” WARNING STICKER VENT PIPE (min. 6” length) FLUE TRANSITION COLLAR FIGURE 15 DO NOT insulate the space between the liner and IMPORTANT the chimney wall with puffed mica or any other loose granular insulating material.
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Page 14: Venting
Do not install a manual damper, barometric draft regulator, 5 - Multiple appliance vents - The flow area of the largest or flue restrictor between the furnace and the chimney. section of vertical vent or chimney shall not exceed 7 times the smallest listed appliance categorized Never connect a Category I appliance to a chimney that is vent area, drafthood outlet area or flue collar area servicing a solid-fuel appliance. - Page 15 9 - If the common vertical vent is offset, the maximum 15 - No portion of the venting system can extend into, common vent capacity listed in the common venting or pass through any circulation air duct or plenum. tables should be reduced by 20%, the equivalent 16 - Vent connectors serving Category I appliances shall of two 90°...
- Page 16 TABLE 3 Capacity of Type B Double-Wall Vents with Type B Double-Wall Connectors Serving a Single Category I Appliance 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) NOTE - Single appliance venting configurations with zero lateral lengths are assumed to have no elbows in the vent system.
- Page 17 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...
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Page 18: Gas Piping
1 - Seal any unused openings in the common venting Gas Supply system. WARNING 2 - Inspect the venting system for proper size and horizontal pitch. Determine that there is no blockage, Do not over torque (800 in-lbs) or under torque (350 in- restriction, leakage, corrosion, or other deficiencies lbs) when attaching the gas piping to the gas valve. - Page 19 TABLE 6 Gas Pipe Capacity - ft3/hr (m3/hr) Nominal Internal Length of Pipe - feet (m) Iron Pipe Diameter Size Inches inches (3.048) (6.096) (9,144) (12,192) (15.240) (18.288) (21.336) (24.384) (27.432) (30,480) (mm) (mm) .622 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84)
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Page 20: Electrical
Horizontal Applications Possible Gas Piping Configurations MANUAL MAIN SHUT-OFF VALVE Horizontal Application MANUAL MAIN SHUT-OFF Left-Side Air Discharge VALVE GROUND JOINT UNION GROUND JOINT DRIP LEG UNION DRIP LEG MANUAL MAIN SHUT-OFF VALVE FIELD PROVIDED GROUND JOINT INSTALLED UNION Horizontal Application NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET DRIP LEG Right-Side Air Discharge... - Page 21 Electrically ground the unit according to local codes or, in INTERIOR MAKE-UP BOX INSTALLATION the absence of local codes, according to the current Na- tional Electric Code (ANSI/NFPA No. 70). A green ground wire is provided in the field make-up box. Right Side NOTE - The EL180UHNE furnace contains electronic components that are polarity sensitive.
- Page 22 Thermostat Indoor Blower Speeds 1 - When the thermostat is set to “FAN ON,” the indoor Install the room thermostat according to the instructions blower will run continuously on the fan speed when provided with the thermostat. See FIGURE 22 and or there is no cooling or heating demand.
- Page 23 EL180UHNE-040 Schematic Wiring Diagram FIGURE 23 Page 23...
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Page 24: Integrated Control
Integrated Control RED LED Diagnostic Codes / Status of Furnace Flash Code No power to control or board fault detected Heartbeat Normal Operation - Idle, Continuous Fan, Cool Continuous Rapid Flash Call For Heat / Burner Operation Reverse Line Voltage Polarity Improper Earth Ground Burner failed to light, or lost flame during heat demand Low Flame Signal - check flame sensor... -
Page 25: Unit Start-Up
7 - Wait five minutes to clear out any gas. If you then Unit Start-Up smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s WARNING instructions. If you do not smell gas go to next step. Do not use this furnace if any part has been underwater. -
Page 26: Gas Pressure Measurement
10 - Is pressure switch closed? Obstructed flue will Start unit and allow 5 minutes for unit to reach cause unit to shut off at pressure switch. Check flue steady state. and outlet for blockages. 2- After allowing unit to stabilize for 5 minutes, record manifold pressure and compare to value given in 11 - Are flame rollout switches tripped? If flame rollout TABLE 9. -
Page 27: Other Unit Adjustments
TABLE 11 HEAT FAN OFF TIME IN SECONDS High Altitude Pressure Switch 4501 - 7500 ft Unit Natuarl LP/Propane -040 20K91 NO JUMPER -060 No Change No Change To adjust fan-off timing, reposition jumper across pins to -080 No Change achieve desired setting. -
Page 28: Service
At the beginning of each heating season, and to comply 1 - Check the operation of the ignition system, inspect with the Lennox Limited Warranty, your system should be and clean flame sensor. Check microamps before checked by a licensed professional technician (or equiva- and after. - Page 29 Repair Parts List The following repair parts are available through independent Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate -- Example: EL180UH040NE36A-01. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier.
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Page 30: Start-Up Checklist
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 31 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 32 TABLE 12 Allowable Heating Speeds Model Nunmber Yellow Blue Brown Black EL180UH040NE36A Factory Setting Allowed Not Allowed EL180UH060NE36A Not Allowed Allowed EL180UH080NE48C Allowed Factory Allowed EL180UH100NE60C Not Allowed TABLE 13 Allowable Circulation Speeds Model Numnber Yellow Blue Brown Black All Models Factory Setting Not Allowed Not Allowed...
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Page 33: Blower Data
EL180UH040NE36A PERFORMANCE (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium Medium-Low Pressure Watts Watts Watts Watts Watts in. w.g. 0.00 1430 1200 1025 0.10 1395 1165 1005 0.20 1370 1130 0.30 1345 1100 0.40 1320 1085... - Page 34 EL180UH100NE60C (Less Filter) Air Volume / Watts at Different Blower Speeds Single Side Return Air − Air volumes in bold require External Bottom Return Air, Side Return Air with Return Air from Both Optional Return Air Base and field fabricated transition to Static Sides or Return Air from Bottom and One Side.
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