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AIR FLOW
INSTALLATION
2013 Lennox Industries Inc. INSTRUCTIONS
Dallas, Texas, USA
EL296UHE
®
ELITE SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
507067-01
02/2013
Supersedes 01/2012
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
or
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EL296UHE Unit Dimensions - inches (mm) EXHAUST AIR 3−1/4 1 NOTE − 60C and 60D size units that require air OUTLET (83) volumes 1800 cfm or over (850 L/s) must have one of the following 1−7/8 (48) 1. Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air filter. Required to maintain proper air velocity. D 2. Single side return air with optional Return Air Base 3. Bottom return air. SUPPLY AIR 4. Return air from both sides. OPENING 5. Bottom and one
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EL296UHE Gas Furnace Shipping and Packing List Package 1 of 1 contains The EL296UHE Category IV gas furnace is shipped ready for installation in the upflow or horizontal position. The fur 1 - Assembled EL296UHE unit nace is shipped with the bottom panel in place. The bot 1 - Bag assembly containing the following: tom panel must be removed if the unit is to be installed in 1 - Snap bushing horizontal or upflow applications with bottom return air. 1 - Snap plug The EL296UHE can be installed as e
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In order to ensure proper unit operation in non-direct vent Heating Unit Installed Parallel to Air Handler Unit applications, combustion and ventilation air supply must be Dampers provided according to the current National Fuel Gas Code (open during heating operation only) or CSA‐B149 standard. Installation Locations Gas Unit This furnace is CSA International certified for installation clearances to combustible material as listed on the unit AIR FLOW AIR FLOW nameplate and in the table in figure
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The input rate and temperature rise must be set per the furnace rating plate. WARNING One hundred percent (100%) outdoor air must be pro The State of California has determined that this prod vided for combustion air requirements during construc uct may contain or produce a chemical or chemicals, tion. Temporary ducting may supply outdoor air to the in very low doses, which may cause serious illness furnace. Do not connect duct directly to the furnace. or death. It may also cause cancer, b
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piping. A portion of this information has been reprinted Confined Space with permission from the National Fuel Gas Code (ANSI- A confined space is an area with a volume less than 50 cubic Z223.1/NFPA 54). This reprinted material is not the com 3 feet (1.42 m ) per 1,000 Btu (.29 kW) per hour of the com- plete and official position of the ANSI on the referenced bined input rating of all appliances installed in that space. This subject, which is represented only by the standard in its definition
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Air from Outside EQUIPMENT IN CONFINED SPACE If air from outside is brought in for combustion and ventila (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) tion, the confined space shall be provided with two perma nent openings. One opening shall be within 12” (305mm) of the top of the enclosure and one within 12” (305mm) of Roof Terminated the bottom. These openings must communicate directly Exhaust Pipe or by ducts with the outdoors or spaces (crawl or attic) that freely commu
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EQUIPMENT IN CONFINED SPACE - Installation - Setting Equipment ALL AIR FROM OUTSIDE WARNING ROOF TERMINATED EXHAUST PIPE Do not connect the return air duct to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in OUTLET AIR personal injury or death. FURNACE SIDE WALL WARNING TERMINATED EXHAUST PIPE INLET AIR (ALTERNATE Blower access panel must be securely in place when LOCATION) blower and burners are operating. Gas fumes, w
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SETTING EQUIPMENT UPFLOW APPLICATION UNIT UNIT FRONT FRONT AIR FLOW AIR FLOW 1/2” max. FRONT VIEW SIDE VIEW SIDE VIEW HORIZONTAL APPLICATION UNIT FRONT AIR FLOW 1/2” max. END VIEW FRONT VIEW Unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the front to aid in draining. FIGURE 11 Page 9
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Return Air Guidelines WARNING Return air can be brought in through the bottom or either Improper installation of the furnace can result in per side of the furnace installed in an upflow application. If the sonal injury or death. Combustion and flue products furnace is installed on a platform with bottom return, make must never be allowed to enter the return air system an airtight seal between the bottom of the furnace and the or air in the living space. Use sheet metal screws and platform to en
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Optional Return Air Base (Upflow Applications Only) FURNACE FRONT 1 IF BASE 23 (584) 3−1/4 IS USED Overall 1 (83) WITHOUT (Maximum) Minimum IAQ CABINET, 11 (279) INDOOR AIR A SINGLE 2 1 Maximum 22−7/16 1 QUALITY RETURN AIR Unit side return air 14 (356) (570) PLENUM CABINET Opening Overall MUST (PCO, Filter AIR FLOW (Maximum) COVER BOTH Cabinet, etc.) UNIT AND RETURN SIDE RETURN 5−5/8 AIR BASE 7−1/4 AIR OPENINGS (143) OPENINGS (184) (Either Side) 23 OPTIONAL 3/4 (584) 17−1/2 (446) B Width (50
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The EL296UHE furnace can be installed in horizontal ap HORIZONTAL SUSPENSION KIT plications with either right- or left-hand air discharge. Refer to figure 17 for clearances in horizontal applications. Internal Brace Metal Strap (provided with kit) Horizontal Application (typical) Installation Clearances Right-Hand Discharge Bracket (typical) Left End Right End Air Air Air Flow Flow Flow Bottom (Floor)** Left-Hand Discharge Top FIGURE 18 Left End Right End NOTE - When the furnace is installed on
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Duct System INTAKE PIPE *GAS CONNECTION Use industry‐approved standards to size and install the EXHAUST PIPE supply and return air duct system. Refer to ACCA Manual D. This will result in a quiet and low‐static system that has *Gas connector may be uniform air distribution. used for Canadian installation if accept NOTE - This furnace is not certified for operation in heating able by local authority having jurisdiction. mode (indoor blower operating at selected heating speed) with an external st
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Low temperature solvent cement is recommended during installation in cooler weather. Metal or plastic strapping may CAUTION be used for vent pipe hangers. Uniformly apply a liberal coat Solvent cements for plastic pipe are flammable liq of PVC primer for PVC or use a clean dry cloth for ABS to uids and should be kept away from all sources of clean inside socket surface of fitting and male end of pipe to ignition. Do not use excessive amounts of solvent depth of fitting socket. cement when makin
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8 - After assembly, wipe excess cement from pipe at end Conduct the following test while each appliance is operat of fitting socket. A properly made joint will show a ing and the other appliances (which are not operating) re bead around its entire perimeter. Any gaps may indi main connected to the common venting system. If the cate an improper assembly due to insufficient sol venting system has been installed improperly, you must vent. correct the system as indicated in the general venting
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Resize the common venting system to the minimum NOTE - In Non‐Direct Vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and flue vent pipe size determined by using the appropriate gases are discharged outdoors. In Direct Vent installations, tables in Appendix G. (These are in the current stan combustion air is taken from outdoors and flue gases are dards of the National Fuel Gas Code ANSI Z223.1. discharged outdoors. Intake and exhaust pipe sizing -- Size
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Use the following steps to correctly size vent pipe diameter. IMPORTANT Do not use screens or perforated metal in exhaust or Piping Size Process intake terminations. Doing so will cause freeze-ups and may block the terminations. What is the furnace capacity? 1 045, 070, 090, 110 or 135? Which style termination being used? 2 Standard or concentric? See table 4. Which needs most elbows? 3 Intake or exhaust? How many elbows? Count all elbows inside 4 and outside house. Desired pipe size? 5 2”, 2-1/
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TABLE 4 OUTDOOR TERMINATION USAGE STANDARD CONCENTRIC Wall Kit Wall Ring Kit FlushMount 1-1/2 inch 2 inch 3 inch Kit Vent 2 inch 3 inch 2 inch Pipe Input Size Field 71M80 69M29 Dia. in. Fabricated 51W11 (US) 22G44 (US) 44J40 (US) 60L46 (US) (US) (US) 15F74 4 4 4 4 4 51W12 (CA) 30G28 (CA) 81J20 (CA) 44W92 44W92 44W93 (CA) (CA) (CA) 3 1 1 5 2 2 YES YES YES YES YES YES 3 1 1 5 2 2-1/2 YES YES YES YES YES YES 045 3 1 1 5 2 3 YES YES YES YES YES YES 3 1 1 5 2 2 YES YES YES YES YES YES 3 1 1 5 2 2-1
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TABLE 5 Maximum Allowable Intake or Exhaust Vent Length in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation. Standard Termination at Elevation 0 - 4500 ft 2” Pipe 2-1/2” Pipe 3” Pipe Number Of 90° Elbows Model Model Model Used
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TABLE 5 Continued Maximum Allowable Intake or Exhaust Vent Length in Feet Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. Concentric Termination at Elevation 0 - 4500 ft 2” Pipe 2-1/2” Pipe 3” Pipe Number Of 90° Elbows Model Model Model Used 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 1 73 58 42 22 105 105 89 54 121 121 114 114 105 2 68 53 37 17 100 100 84 49 116 116 10
