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Lennox International Inc. EL180UHE - page 1
Page 1 01/13 *2P0113* 507138-01 *P507138-01* 2013 Lennox Industries Inc. Dallas, T exas, USA UPFLOW HORIZONT AL LEFT HORIZONT AL RIGHT AIR FLOW AIR FLOW AIR FLOW INST ALLA TION INSTRUCTIONS EL180UHE ELITE ® SERIES GAS FURNACE UPFLOW / HORIZONT AL AIR DISCHARGE 507138-01 01/2013 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE T ...
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Lennox International Inc. EL180UHE - page 2
Page 2 Unit Dimensions - inches (mm) AIR FLOW 23 (584) (19) 3/4 (19) 1 Bottom Return Air Opening GAS PIPING INLET (Either Side) Side Return Air Opening (Either Side) 1 Bottom Return Air Opening FLUE OUTLET (T op) ELECTRICAL INLET (Either Side) SUPPL Y AIR OPENING FRONT VIEW SIDE VIEW TOP VIEW A B 9/16 (14) C D 3/4 27−3/4 (705) 19−7/16 (494) 23? ...
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Lennox International Inc. EL180UHE - page 3
Page 3 EL180UHE Gas Furnace The E L180UHE unit is s hipped ready f or installation i n the upflow o r horizontal right position ( for horizontal left p osi tion the combustion air pressure switch must be moved) fueled b y n atural gas. A conversion kit ( ordered separate ly) i s required for u se i n L P/Propane gas applications. T he furnace ...
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Lennox International Inc. EL180UHE - page 4
Page 4 Installed in Combination with a Cooling Coil When this furnace is used with cooling units, it shall be installed in p arallel with, or on the upstream s ide of, cooling units to avoid condensation in the heating compartment. See f igure 1. W ith a parallel flow arrangement, a d amper (or other means t o control t he flow of air) m u st adequ ...
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Lennox International Inc. EL180UHE - page 5
Page 5 Do not install the furnace where drafts might blow direct ly into it. This could cause improper combustion and un safe operation. Do not block the furnace combustion air openings with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation. When the furnace is installed in an attic or other ...
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Lennox International Inc. EL180UHE - page 6
Page 6 separated b y a door . Though an area may appear to be un confined, it might be necessary to bring in outdoor air for combustion if t he str ucture does not provide enough air by infiltration. If the furnace is located in a building of tight construction with weather stripping and caulking around the windows and doors, follow the procedur ...
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Lennox International Inc. EL180UHE - page 7
Page 7 EQUIPMENT IN CONFINED SP ACE ALL AIR FROM OUTSIDE (Inlet Air from Crawlspace and Outlet Air to V entilated Attic) NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch (645 mm 2 ) per 4,000 Btu (1.17 kW) per hour of the total input rating of all equipment in the enclosure. VENTILA TION LOUVERS (Each e ...
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Lennox International Inc. EL180UHE - page 8
Page 8 Setting Equipment W ARNING Do not install the furnace on its front or its back. Do no t connect the return air ducts to the back of the fur nace. Doing so w ill adversely affect the operation of the safety control devices, which could result in per sonal injury or death. The EL180UHE gas furnace can be i nstalled a s s hipped in either ...
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Lennox International Inc. EL180UHE - page 9
Page 9 Return Air -- Upflow Applications Return air can be brought in t hrough the bottom or either side o f the furnace i nstalled i n a n u pflow a pplication. I f t he furnace i s installed o n a p latform w ith b ottom r eturn, make an a irtight s eal between the bottom of the furnace and the platform t o ensure that the furnace operates proper ...
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Lennox International Inc. EL180UHE - page 10
Page 10 Removing the Bottom Panel Remov e the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall the bottom cap. See figure 10. Removing the Bottom Panel FIGURE 10 Screw Bottom Panel Bottom Cap Horizontal Application Installation Clearances T ...
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Lennox International Inc. EL180UHE - page 11
Page 1 1 CAUTION If this unit is being installed in a space serviced by an exhaust fan, power exhaust fan, or other device which may create a negative pressure in the space, take care when sizing the inlet air opening. The in let air opening must be sized to accommodate the maximum volume of exhausted air as well as the maximum volume of combust ...
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Lennox International Inc. EL180UHE - page 12
Page 12 Return Air Plenum NOTE - Return air must not be drawn from a room where this furnace, or any other gas-fueled appliance (i.e., water heater), or carbon monoxide producing de vice (i.e., wood fireplace) is installed. When return air is drawn from a room, a negative pres sure i s c reated i n t he r oom. I f a g as appliance is oper ...
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Lennox International Inc. EL180UHE - page 13
Page 13 UPFLOW POSITION Left Side V ent Discharge FIGURE 16 Gas supply piping must be brought into the unit from the right side in order to accommodate the flue pipe. Cut Combustion air inducer tubing from 9” to 8” to avoid inter ference with inducer motor Remove make-up box assembly (2 screws) and cut wire tie to free make-up bo ...
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Lennox International Inc. EL180UHE - page 14
Page 14 HORIZONT AL RIGHT POSITION T op V ent Discharge FIGURE 20 Remove make-up box assembly (2 screws) and cut wire tie to free make-up box wires. Re-install make-up box on other side of cabinet. Re-secure make-up box wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and ...
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Lennox International Inc. EL180UHE - page 15
Page 15 FLUE TRANSITION COLLAR VENT PIPE (min. 6” length) “DISCONNECTED VENT” WARNING STICKER FIGURE 22 FLUE TRANSITION COLLAR VENT CONNECTION UPFLOW AND HORIZONT AL POSITION VENT PIPE (min. 6” length) “DISCONNECTED VENT” WARNING STICKER FIGURE 23 Common V enting Using Metal-Lined Masonry Chimney 4 in. (102 mm) minimum MIN. LENGTH -- AS ...
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Lennox International Inc. EL180UHE - page 16
Page 16 A type B or listed chimney lining system that passes through an unused masonry chimney flue is not considered to be exposed to the outdoors. General V enting Requirements V ent all EL180UHE furnaces according to these instruc tions: 1 - V ent diameter recommendations and maximum allow able piping runs are found in the provided venting ...
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Lennox International Inc. EL180UHE - page 17
Page 17 9 - If the common vertical vent is of fset, the maximum common vent capacity listed in the common venting tables should be reduced by 20%, the equivalent of two 90° elbows (0.80 x maximum common vent capacity). The horizontal length of the offset shall not exceed 1‐1/2 feet (.46 m) for each inch (25 mm) of common vent diameter . 10 - The ...
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Lennox International Inc. EL180UHE - page 18
Page 18 T ABLE 3 Capacity of T ype B Double-W all V ents with T ype B Double-Wall Connectors Serving a Single Category I Appliance Height H (feet) Lateral L (feet) V ent and Connector Diameter - D (inches) 3 Inch 4 Inch 5 Inch 6 Inch Appliance Input Rating in Thousands of Btu Per Hour MIN MAX MIN MAX MIN MAX MIN MAX 6 0 0 78 0 152 0 251 0 375 2 13 ...
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Lennox International Inc. EL180UHE - page 19
Page 19 T ABLE 4 V ent Connector Capacity T ype B Double-W all V ents with T ype B Double-Wall Connectors Serving T wo or More Category I Appliances V ent Height H (feet) Connector Rise R (feet) V ent and Connector Diameter - D (inches) 3 Inch 4 Inch 5 Inch 6 Inch Appliance Input Rating in Thousands of Btu Per Hour MIN MAX MIN MAX MIN MAX MIN MAX 6 ...
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Lennox International Inc. EL180UHE - page 20
Page 20 Removal of the Furnace from Common V ent In the event that an existing furnace is removed from a venting system commonly run with separate gas ap pliances, the venting system is likely to be too large to properly vent the remaining attached appliances. Conduct t he f ollowing test while e ach a ppliance i s operat ing a nd the o ther ...
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Lennox International Inc. EL180UHE - page 21
Page 21 T ABLE 6 Gas Pipe Capacity - ft 3 /hr (m 3 /hr) Nominal Iron Pipe Size inches (mm) Internal Diameter inches (mm) Length of Pipe - feet (m) 10 (3.048) 20 (6.096) 30 (9.144) 40 (12.192) 50 (15.240) 60 (18.288) 70 (21.336) 80 (24.384) 90 (27.432) 100 (30.480) 1/2 (12.7) .622 (17.799) 172 (4.87) 11 8 (3.34) 95 (2.69) 81 (2.29) 72 (2.03) 65 (1.8 ...
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Lennox International Inc. EL180UHE - page 22
Page 22 GROUND JOINT UNION DRIP LEG MANUAL MAIN SHUT-OFF VA LV E GROUND JOINT UNION DRIP LEG MANUAL MAIN SHUT-OFF VA LV E GROUND JOINT UNION DRIP LEG MANUAL MAIN SHUT-OFF VA LV E Horizontal Applications Possible Gas Piping Configurations Horizontal Application Left-Side Air Discharge Horizontal Application Right-Side Air Discharge NOTE - BLACK IRON ...
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Lennox International Inc. EL180UHE - page 23
Page 23 INTERIOR MAKE-UP BOX INST ALLA TION FIGURE 28 BOX Right Side Refer to figure 2 9 for schematic wiring diagram, field wiring and trouble shooting. The power supply wiring must meet Class I restrictions. Protected by either a fuse or circuit breaker , select circuit protection and wire size according to unit nameplate. NOTE - Unit nameplate s ...
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Lennox International Inc. EL180UHE - page 24
Page 24 FIGURE 2 9 EL180UHE Schematic Wiring Diagram ...
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Lennox International Inc. EL180UHE - page 25
Page 25 Integrated Control RED LED Flash Code Diagnostic Codes / Status of Furnace Off No power to control or board fault detected On Board fault detected, Heartbeat 1 Control powered - displayed during all modes of operation if no errors are detected 1 Reverse Line V oltage Polarity 2 Improper Earth Ground 3 Burner failed to light, or lost flame d ...
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Lennox International Inc. EL180UHE - page 26
Page 26 Unit Start-Up FOR YOUR SAFETY READ BEFORE LIGHTING W ARNING Do not use this furnace if any part has been under water . A flood-damaged furnace is extremely dan gerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified ser vice t echnician to inspect the f urnace a nd t o r eplace all g as c ...
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Lennox International Inc. EL180UHE - page 27
Page 27 1 1 - Are flame rollout switches tripped? If flame rollout switches are tripped, call the service technician for in spection. Heating Sequence Of Operation (follow steps below or see Figure 29 for more detail) 1 - Whe n thermostat calls for heat, combustion air blower starts. 2 - Combustion air pressure switch proves blower opera tion ...
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Lennox International Inc. EL180UHE - page 28
Page 28 T ABLE 10 Manifold Pressure Settings at all Altitudes Model Input Size Gas 0-2000 ft 2001-4500 ft. 4501-7500 ft 7501 - 10,000 ft Line Pressure in.wg. Min Max 045 Nat 3.5 3.2 3.0 3.5 4.5 13.0 LP/propane 10.0 10.0 10.0 10.0 1 1.0 13.0 070 Nat 3.5 3.2 2.8 3.5 4.5 13.0 LP/propane 10.0 10.0 10.0 10.0 1 1.0 13.0 090 Nat 3.5 3.2 2.7 3.5 4.5 13.0 L ...
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Lennox International Inc. EL180UHE - page 29
Page 29 HEA T F AN‐OFF TIME IN SECONDS T o adjust fan-off timing, reposition jumper across pins to achieve desired setting. NO JUMPER FIGURE 32 60 90 120 180 60 90 120 180 60 90 120 180 60 90 120 180 60 Second off T ime 90 Second off T ime 120 Second off T ime 180 Second off T ime Constant T orque Motor EL180UHE units a re equipped w ith a consta ...
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Lennox International Inc. EL180UHE - page 30
Page 30 2 - Label the wires from gas valve, rollout switches, prima ry limit switch and make-up box then disconnect them. 3 - Disconnect gas supply piping. Remove the screw se curing the burner box cover and remove cover . Re mo ve the four screws securing the burner manifold as sembly to the vestibule panel and remove the assembly from ...
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Lennox International Inc. EL180UHE - page 31
Page 31 Start-Up & Performance Check List Unit Model Number_______________ Serial Number___________________ UNIT SET UP (typical) Gas Supply Pressure 1 2 2 1 SUPPL Y AIR Line V oltage 3 4 5 Filter RETURN AIR RETURN AIR GAS SUPPL Y Natural Gas LP/Propane Gas Piping Connections Tight Leak T ested Supply Line Pressure “ W .C.________ 1 VENT / EX ...
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Lennox International Inc. EL180UHE - page 32
Page 32 Contractor's: Name_________________________T elephone_____________Checklist Completed____________________ Job Address_____-________________________________T echnician's Name___________________________________ UNIT OPERA TION (typical) 1 HEA TING MODE GAS MANIFOLD PRESSURE “W .C._____ COMBUSTION SAMPLE CO 2 % ______ CO PPM_______ ...
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