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INSTALLATION
2013 Lennox Industries Inc.
INSTRUCTIONS
Dallas, Texas, USA
EL180UHE
®
ELITE SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
507138-01
01/2013
Litho U.S.A.
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 manuals, be alert
to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
UPFLOW
or maintenance can cause
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Unit Dimensions - inches (mm) 3−1/8 (79) 1 NOTE − 60C and 60D size units that require air volumes over 1800 cfm (850 L/s) must have one of the following: 1. Single side return air with transition, to accommodate D 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air filter. Required to maintain proper air velocity. 2. Single side return air with optional Return Air Base SUPPLY AIR 3. Bottom return air. FLUE OUTLET OPENING 4. Return air from both sides. (Top) 5. Bottom and one side return air. See B
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EL180UHE Gas Furnace CAUTION The EL180UHE unit is shipped ready for installation in the As with any mechanical equipment, personal injury upflow or horizontal right position (for horizontal left posi can result from contact with sharp sheet metal tion the combustion air pressure switch must be moved) edges. Be careful when you handle this equipment. fueled by natural gas. A conversion kit (ordered separate Certifications ly) is required for use in LP/Propane gas applications. The EL180UHE unit
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Installed in Combination with a Cooling Coil This furnace design has not been CSA International certified for installation in mobile homes, recreational When this furnace is used with cooling units, it shall be vehicles, or outdoors. installed in parallel with, or on the upstream side of, cooling units to avoid condensation in the heating compartment. Use of Furnace as Construction Heater See figure 1. With a parallel flow arrangement, a damper (or Lennox does not recommend the use of EL180UHE u
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Do not install the furnace where drafts might blow direct ly into it. This could cause improper combustion and un CAUTION safe operation. Do not install the furnace in a corrosive or contami Do not block the furnace combustion air openings with nated atmosphere. Meet all combustion and ventila clothing, boxes, doors, etc. Air is needed for proper tion air requirements, as well as all local codes. combustion and safe unit operation. When the furnace is installed in an attic or other ins
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separated by a door. Though an area may appear to be un Air from Inside confined, it might be necessary to bring in outdoor air for If the confined space that houses the furnace adjoins a combustion if the structure does not provide enough air by space categorized as unconfined, air can be brought in by infiltration. If the furnace is located in a building of tight providing two permanent openings between the two construction with weather stripping and caulking around spaces. Each opening must
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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 AIR WATER FURNACE HEATER INLET VENTILATION AIR LOUVERS (For unheated crawl space) NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch (645 2 mm ) per 4,000 Btu (1.17 kW) per hour of the total input rating of all equipment in the enclosure. FIGURE 3 EQUIPMENT IN EQUIPMENT IN CON
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Upflow Applications Setting Equipment Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum clearances for closet or al WARNING cove 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 fur nace. Doing so will adversely affect the operation of Top the safety control devices, which could result in per sonal injury or death. T
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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. The furnace is equipped with a removable bottom 20” X 25” X 1” panel to facilitate installation. (508mm X 63
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Removing the Bottom Panel Horizontal Applications Remove the two screws that secure the bottom cap to the The EL180UHE furnace can be installed in horizontal ap furnace. Pivot the bottom cap down to release the bottom plications. Order horizontal suspension kit (51W10) from panel. Once the bottom panel has been removed, reinstall Lennox, or use equivalent suspension method. the bottom cap. See figure 10. Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum c
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Filters CAUTION This unit is not equipped with a filter or rack. A field-pro If this unit is being installed in a space serviced by vided high-velocity filter is required for the unit to operate an exhaust fan, power exhaust fan, or other device properly. Table 1 lists recommended filter sizes. 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 IMPORTANT maximum volume of exhausted air as well
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Return Air Plenum UPFLOW POSITION NOTE - Return air must not be drawn from a room Top Vent Discharge where this furnace, or any other gas-fueled appliance Vent Pipe Flue (i.e., water heater), or carbon monoxide producing de Transition Collector Box Pressure vice (i.e., wood fireplace) is installed. Switch When return air is drawn from a room, a negative pres sure is created in the room. If a gas appliance is operating in a room with negative pressure, the flue products can Make-Up Box be pull
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UPFLOW POSITION HORIZONTAL LEFT POSITION Left Side Vent Discharge Top Vent Discharge Vent Pipe Cover Plate Collector Box Pressure Make-Up Switch Box Pressure Switch Vent Pipe AIR Flue Transition FLOW Flue Transition Cover Plate FLOW AIR Gas supply piping must be brought into the unit from the right side in order to accommodate the flue pipe. Make-Up Box Collector Box Cut Combustion air inducer tubing from 9” to 8” to avoid inter ference with inducer motor Disconnect pressure switch
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nace is an appliance equipped with an integral mechanical HORIZONTAL RIGHT POSITION means to either draw or force combustion products through Top Vent Discharge the combustion chamber and/or heat exchanger. The Vent Pipe EL180UHE is not approved for use with horizontal venting. Pressure Switch NOTE - Use these instructions as a guide. They do not su Flue persede local codes. This furnace must be vented accord Transition ing to all local codes these installation instructions, and the Cover Plat
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VENT CONNECTION UPFLOW AND HORIZONTAL POSITION “DISCONNECTED VENT” WARNING STICKER VENT PIPE (min. 6” length) “DISCONNECTED VENT” WARNING STICKER FLUE TRANSITION COLLAR FLUE TRANSITION VENT PIPE COLLAR (min. 6” length) FIGURE 22 Common Venting Using Metal-Lined Masonry Chimney IMPORTANT SEALED SINGLE appliance venting of a fan‐assisted furnace into a tile‐lined masonry chimney (interior or outside MAX. LENGTH wall) is PROHIBITED. The chimney must first be lined -- SEE NOTE 1 BELOW. with either
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A type B or listed chimney lining system that passes section of vertical vent or chimney shall not exceed 7 through an unused masonry chimney flue is not considered times the smallest listed appliance categorized vent to be exposed to the outdoors. area, drafthood outlet area or flue collar area unless de signed according to approved engineering methods. General Venting Requirements 6 - The entire length of single wall metal vent connector Vent all EL180UHE furnaces according to these instruc
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9 - If the common vertical vent is offset, the maximum ings must be installed with the listed clearance to com common vent capacity listed in the common venting bustible materials and be fire stopped according to lo tables should be reduced by 20%, the equivalent of two cal codes. In absence of local codes, refer to NFGC 90° elbows (0.80 x maximum common vent capacity). (Z223.1). The horizontal length of the offset shall not exceed 15 - No portion of the venting system can extend into, or pa
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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 H L Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) MIN MAX MIN MAX MIN MAX MIN MAX 0 0 78 0 152 0 251 0 375 2 13 51 18 97 27 157 32 232 6 4 21 49 30 94 39 153 50 227 6 25 46 36 91 47 149 59 223 0 0 84 0 165 0 276 0 415 2 12 57 16 109 25 178 28 263 8 5 23 53 32 103 42 171 53 255
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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) Vent Connector 3 Inch 4 Inch 5 Inch 6 Inch Height Rise H R Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) MIN MAX MIN MAX MIN MAX MIN MAX 1 22 37 35 66 46 106 58 164 2 23 41 37 75 48 121 60 183 6 3 24 44 38 81 49 132 62 199 1 22 40 35 72 49 114 64 176 8 2 23 44 36 80 51 128 66 195 3 24 47 37 87 53 139 67
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Removal of the Furnace from Common Vent Resize the common venting system to the minimum vent pipe size determined by using the appropriate In the event that an existing furnace is removed from a tables in Appendix G. (These are in the current stan venting system commonly run with separate gas ap pliances, the venting system is likely to be too large to dards of the National Fuel Gas Code ANSI Z223.1. properly vent the remaining attached appliances. Gas Piping Conduct the following test while e
