Lennox EL296UHE Installation Instructions Manual

Elite el296uhe series gas furnace upflow / horizontal air discharge

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Unit information (65 pages)

Installation instructions manual (56 pages)

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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS E 2013 Lennox Industries Inc. 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.
Page 2: Unit Dimensions
EL296UHE Unit Dimensions - inches (mm) EXHAUST AIR 3−1/4 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.
Page 3: El296Uhe Gas Furnace
1 - Snap bushing horizontal or upflow applications with bottom return air. 1 - Snap plug The EL296UHE can be installed as either a Direct Vent 1 - Wire tie or a Non-Direct Vent gas central furnace. 1 - Condensate trap The furnace is equipped for installation in natural gas ap...
Page 4: Use Of Furnace As Construction Heater
EL296UHE units may be used for heating of buildings or heating or the cooling unit, unless it is in the full HEAT or structures under construction, if the following conditions COOL setting.
Page 5: General
Combustion, Dilution & Ventilation Air directly into it. This could cause improper combustion If the EL296UHE is installed as a Non-Direct Vent Fur and unsafe operation. nace, follow the guidelines in this section.
Page 6 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 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...
Page 7 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”...
Page 8 The EL296UHE gas furnace can be installed as shipped of at least 1 square inch per 4,000 Btu (645mm per 1.17kW) per...
Page 9: Setting Equipment
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...
Page 10 Fire, explo EL296UHE applications which include side return air sion, carbon monoxide poisoning, personal injury and a condensate trap installed on the same side of the and/or property damage could result.
Page 11 Optional Return Air Base (Upflow Applications Only) FURNACE FRONT IF BASE 23 (584) 3−1/4 IS USED Overall (83) (Maximum) WITHOUT Minimum IAQ CABINET, 11 (279) INDOOR AIR A SINGLE Maximum 22−7/16 QUALITY RETURN AIR Unit side return air 14 (356) (570) CABINET PLENUM...
Page 12 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...
Page 13: Filters
Before using any filter with this system, check the the filter frame. specifications provided by the filter manufacturer against the data given in the appropriate Lennox Pipe & Fittings Specifications Product Specifications bulletin. Additional informa tion is provided in Service and Application Note All pipe, fittings, primer and solvent cement must conform ACC002 (August 2000).
Page 14: Joint Cementing Procedure
Take care to keep excess cement out of socket. Apply sec EL296UHE exhaust and intake connections are ond coat to end of pipe. made of PVC. Use PVC primer and solvent cement when using PVC vent pipe.
Page 15: Venting Practices
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.
Page 16: Vent Piping Guidelines
15 ft. or 5 ft. plus 2 elbows or 045, 070, 090, 110, 135 The EL296UHE can be installed as either a Non-Direct 10 ft. plus 1 elbow Vent or a Direct Vent gas central furnace. *Any approved termination may be added to the minimum length listed.
Page 17 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? 045, 070, 090, 110 or 135? Which style termination...
Page 18: Outdoor Termination Usage
TABLE 4 OUTDOOR TERMINATION USAGE STANDARD CONCENTRIC Wall Kit Wall Ring Kit FlushMount 1-1/2 inch 2 inch 3 inch Vent 2 inch 3 inch 2 inch Pipe Input Size Field 71M80 69M29 Dia. in. Fabricated 51W11 (US) 22G44 (US) 44J40 (US) (US) (US) 60L46 (US)
Page 19 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.
Page 20 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”...
Page 21 TABLE 6 Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl Space For Intake Air 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.
Page 22 TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS EXHAUST INTAKE EXHAUST INTAKE 2” 2” 2” 2” 3” 3” TRANSITION TRANSITION 2” 2” *2” *2” DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe.
Page 23 Intake Piping TYPICAL AIR INTAKE PIPE CONNECTIONS The EL296UHE furnace may be installed in either direct HORIZONTAL NON−DIRECT VENT APPLICATIONS vent or non-direct vent applications. In non-direct vent (Horizontal Right−Hand Air Discharge Application Shown) applications, when intake air will be drawn into the furnace...
Page 24 The EL296UHE is then classified as a direct vent, all gas appliances serviced by this space. Category IV gas furnace.
Page 25 TABLE 7 Maximum Allowable Exhaust Vent Pipe Length Without Insulation In Unconditioned Space For Winter Design Temperatures Unit Input Size Winter Design Vent Pipe Temperatures °F (°C) Diameter 2 in. 32 to 21 2-1/2 in. (0 to -6) 3 in. 2 in 20 to 1 2-1/2 in.
Page 26: Vent Termination Clearances
‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible. FIGURE 30...
Page 27 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible. FIGURE 31 Page 27...
Page 28 6” with a termination elbow. See 1-1/2” (38MM) *045 and 070 figures 36 and 37. *090 2” (51MM) 2” (51MM) 2” (51MM) *EL296UHE-045, -070 and -090 units with the flush mount termination must use the 1-1/2”accelerator supplied with the kit. Page 28...
Page 29 7 - If intake and exhaust piping must be run up a side wall 8 - A multiple furnace installation may use a group of up to to position above snow accumulation or other ob four terminations assembled together horizontally, as structions, piping must be supported every 24”...
Page 30 FIELD FABRICATED WALL TERMINATION OR FIELD FABRICATED WALL TERMINATION OR (15F74) WALL RING TERMINATION KIT (15F74) WALL RING TERMINATION KIT With INTAKE ELBOW NOTE - FIELD-PROVIDED NOTE - FIELD-PROVIDED 1/2” (13MM) ARMAFLEX REDUCER MAY BE REDUCER MAY BE INSULATION IN UN 1/2”...
Page 31: Front View
2” EXTENSION FOR 2” PVC PIPE1” EXTENSION FOR 3” PVC PIPE 12” EXHAUST (305MM) FURNACE VENT 5-1/2” 5” (140mm) EXHAUST (127MM) INTAKE PIPE 18” MAX. FURNACE Front View (457MM) INTAKE PIPE EXHAUST VENT 12” (305MM) Min. GLUE EXHAUST above grade or END FLUSH INTO average snow TERMINATION...
Page 32 WALL TERMINATION KITS (CLOSE−COUPLE) EXTENDED VENT FOR GRADE CLEARANCE 2 inch (51 mm) 22G44 (US) 3 inch (76 mm) 44J40 (US) If intake and exhaust pipe is less than 12 in. (305 MM) above snow accumulation or other obstructions, field− FIELD-PROVIDED fabricated piping must be installed.
Page 33 EL296UHE DIRECT VENT APPLICATION 12” (305MM) MAX. for 2” (51MM) 20” (508MM) MAX. for 3” (76MM) USING EXISTING CHIMNEY 1/2” (13MM) ARMAFLEX STRAIGHT-CUT OR INSULATION IN ANGLE-CUT IN DIRECTION 3”-8” UNCONDITIONED SPACE 1/2” (13MM) OF ROOF SLOPE * (76MM-203MM) ARMAFLEX...
Page 34 EL296UHE NON-DIRECT VENT APPLICATION CONDENSATE TRAP AND PLUG LOCATIONS (Unit shown in upflow position) USING EXISTING CHIMNEY Trap SIZE TERMINATION STRAIGHT-CUT OR (same on ANGLE-CUT IN DIRECTION PIPE PER TABLE 8. OF ROOF SLOPE right side) 1-1/2 in. EXHAUST VENT 1/2”...
Page 35 If this is not possible, a heat cable kit may be used on the condensate trap and line. Heating cable kit is available from Lennox in various lengths; 6 ft. (1.8m) - kit no. 26K68; 24 ft. (7.3m) - kit no. 26K69; and 50 ft.
Page 36 EL296UHE with Evaporator Coil Using a Separate Drain (Unit shown in horizontal left-hand discharge position) Field Provided Vent Evaporator (4” min. to 5” max. above Coil condensate connection) 4”min 5”max 5’ max. PVC Pipe Only Condensate Drain Connection Drain Pan Piping from furnace and evaporator coil must slope down a minimum 1/4”...
Page 37 TRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC Optional Condensate Drain Connection Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) 90° Street Elbow 3/4 inch PVC (not furnished) Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) Condensate Drain Connection In Unit 1 (25 mm) Min.
Page 38: Gas Piping
6 - In some localities, codes may require installation of a Gas Piping manual main shut‐off valve and union (furnished by in Gas supply piping should not allow more than 0.5”W.C. drop staller) external to the unit. Union must be of the in pressure between gas meter and unit.
Page 39 Left Side Piping Right Side Piping (Standard) (Alternate) MANUAL MAIN SHUT-OFF MANUAL VALVE MAIN SHUT-OFF VALVE GROUND GROUND JOINT JOINT UNION UNION DRIP LEG Gas Valve Gas Valve DRIP LEG FIELD PROVIDED AND INSTALLED NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET FIGURE 61 Horizontal Applications Possible Gas Piping Configurations...
Page 40: Electrical
Canadian Electric Code part 1 (CSA standard C22.1) for Canada. A green ground wire is provided in the field make-up box. NOTE - The EL296UHE furnace contains electronic components that are polarity sensitive. Make sure that the FIGURE 63 furnace is wired correctly and is properly grounded.
Page 41 On-Board Link W915 2 Stage Compr (Y1 to Y2) On-board link W915 is a clippable connection between ter 2 - When the EL296UHE is running in the heating mode, minals Y1 and Y2 on the integrated control. W915 must be the indoor blower will run on the 'LOW HEAT”...
Page 42 TYPICAL EL296UHE WIRING DIAGRAM FIGURE 64 Page 42...
Page 43: Integrated Control
Integrated Control 24VAC Indoor Blower Terminals Ignitor and Combustion Air Inducer Neutrals Flame Sense S4 DIP Switches Diagnostic Push Button On Board Links THERMOSTAT CONNECTIONS (TB1) 3/16” QUICK CONNECT TERMINALS 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 44: Integrated Control Dip Switch Settings
The blower off delay affects comfort and is adjust able to satisfy individual applications. Adjust the blower off EL296UHE units are equipped with a two-stage integrated control. This control manages ignition timing, heating delay to achieve a supply air temperature between 90° and mode fan off delays and indoor blower speeds based on 110°F at the exact moment that the blower is de-energized.
Page 45 TABLE 14 EL296 Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links (See figure 65) 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...
Page 46 TABLE 14 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (See figure 65) 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...
Page 47 TABLE 14 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (figure 65) DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat System Options Heating Stages Dual Fuel FURNACE HEAT PUMP L7724U TERM.
Page 48 TABLE 14 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (figure 65) DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat System Options Heating Stages Dual Fuel FURNACE HEAT PUMP L7742U TERM.
Page 49: Unit Start Up
The gas valve on the EL296UHE is equipped with a gas control switch (lever). Use only your hand to move switch. Never use tools. If the the switch will not move by hand, do not try to repair it.
Page 50: Gas Pressure Measurement
NOTE - Pressure test adapter kit (10L34) is available from 4 - After a 20-second ignitor warm-up period, the gas Lennox to facilitate manifold pressure measurement. valve solenoid opens. A 4-second trial for ignition peri A manifold pressure post located on the gas valve provides od begins.”...
Page 51: Proper Combustion
Proper Combustion High Altitude Information Furnace should operate minimum 15 minutes with correct NOTE - In Canada, certification for installations at eleva manifold pressure and gas flow rate before checking com tions over 4500 feet (1372 m) is the jurisdiction of local au bustion.
Page 52 Do not operate a summer exhaust fan. After the EL296UHE gas furnace has been started, the fol 6 - Follow the lighting instruction to place the appliance lowing test should be conducted to ensure proper venting being inspected into operation.
Page 53: Other Unit Adjustments
The two-stage, variable speed integrated control used in heat is satisfied, the gas valve is de-energized and the EL296UHE units has an added feature of an internal Watch field-selected indoor blower off delay begins. The guard control. The feature serves as an automatic reset de...
Page 54: Repair Parts List
Applications Using A Single-Stage Thermostat Repair Parts List B - Heating Sequence -- Integrated Control Thermostat The following repair parts are available through Lennox Selection DIP Switch 1 ON in “Single-Stage” Position dealers. When ordering parts, include the complete fur...
Page 55: Service
2 - Check for the correct voltage at the furnace (furnace Service operating). 3 - Check amp-draw on the blower motor. Motor Nameplate__________Actual__________ WARNING Winterizing and Condensate Trap Care 1 - Turn off power to the furnace. ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
Page 56: Start-Up And Performance Checklist
Start-Up & Performance Check List UNIT SET UP (typical) Furnace: Model Number_______________ Serial Number_________________ SUPPLY Line Voltage GAS SUPPLY LP Propane Gas Natural Gas Piping Connections Tight Leak Tested Flter Supply Line Pressure “W.C.________ RETURN AIR Gas Supply Pressure DUCT SYSTEM SUPPLY AIR DUCT Sealed INTAKE / EXHAUST PIPE...
Page 57 UNIT OPERATION HEATING MODE COOLING MODE GAS MANIFOLD PRESSURE “W.C._____ INDOOR BLOWER AMPS______ COMBUSTION SAMPLE CO CO PPM_______ TEMPERATURE DROP ______ Return Duct Temperature _________ INDOOR BLOWER AMPS______ Supply Duct Temperature _______ Temperature Drop = _________ TEMPERATURE RISE TOTAL EXTERNAL STATIC (dry coil) Supply Duct Temperature ________ Supply External Static _______ Return Duct Temperature...
Page 58 Requirements for Commonwealth of Massachusetts Modifications to NFPA-54, Chapter 10 4 - INSPECTION. The state or local gas inspector of the side wall, horizontally vented, gas-fueled equipment Revise NFPA-54 section 10.8.3 to add the following re shall not approve the installation unless, upon inspec quirements: tion, the inspector observes carbon monoxide detec...

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Lennox EL296UHE Installation Instructions Manual

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