Lennox EL296DFV Installation Instructions Manual

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Summary of Contents for Lennox EL296DFV

Page 1: Table Of Contents
A thermostat is not included and must be ordered DOWNFLOW separately. D The Lennox icomforti ® thermostat must be used in communicating applications. D In non-communicating applications, the Lennox AIR FLOW ® ComfortSense 7500 thermostat may be used, as well as other non-communicating thermostats. CAUTION In all cases, setup is critical to ensure proper sys...
Page 2: Air Flow
EL296DFV Unit Dimensions - inches (mm) 9/16 (14) COMBUSTION AIR INTAKE RETURN AIR OPENING EXHAUST AIR OUTLET 2−1/16 (52) 9/16 2−1/4 (14) (57) (127) TOP VIEW 27−3/4 1−1/2 (38) (705) Front Panel 6−1/4 (157) 9/16 19−7/16 9/16 1 (25) (14)
Page 3: Caution
1 - Snap plug quired for use in propane/LP gas applications. 1 - Wire tie The EL296DFV can be installed as a Direct Vent or Non- 1 - Condensate trap Direct Vent gas central furnace. 1 - Condensate trap cap...
Page 4: Use Of Furnace As Construction Heater
This furnace design has not been CSA certified for installa tion in mobile homes, recreational vehicles, or outdoors. This EL296DFV furnace must be installed so that its electri cal components are protected from water. Never use an open flame to test for gas leaks. Check all...
Page 5: General
Combustion, Dilution & Ventilation Air • The input rate and temperature rise must be set per the If the EL296DFV is installed as a Non-Direct Vent Fur furnace rating plate. nace, follow the guidelines in this section. • One hundred percent (100%) outdoor air must be pro...
Page 6 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 bined input rating of all appliances installed in that space. This subject, which is represented only by the standard in its definition includes furnace closets or small equipment rooms.
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 EL296 Furnaces with EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE (All Air Through Ventilated Attic) 1/2 HP Blower Motor ROOF TERMINATED VENTILATION LOUVERS EXHAUST PIPE (Each end of attic) RIGID LEG (Remove shipping bolt OUTLET and washer) FIGURE 10 INLET AIR SIDE WALL (Ends 12”...
Page 9: Setting Equipment
SETTING EQUIPMENT AIR FLOW AIR FLOW AIR FLOW UNIT UNIT FRONT FRONT 1/2” max. SIDE VIEW SIDE 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 Horizontal Front...
Page 10 Installation on Non-Combustible Flooring Figure 14 WARNING 1 - Cut floor opening keeping in mind clearances listed on Improper installation of the furnace can result in per unit rating plate. Also keep in mind gas supply connec sonal injury or death. Combustion and flue products tions, electrical supply, flue and air intake connections must never be allowed to enter the return air system and sufficient installation and servicing clearances.
Page 11 TABLE 2 COMBUSTIBLE FLOORING BASE OPENING SIZE Front to Rear Side to Side Cabinet Catalog FURNACE Width Number B Cabinet 11M60 18 - 3/4 (17.5”) C Cabinet COOLING COIL 11M61 22 - 3/4 (21”) PROPERLY SIZED FLOOR OPENING PLENUM FURNACE SUPPLY AIR PLENUM PROPERLY...
Page 12: Filters
This specifications provided by the filter manufacturer reverse flow of the flue gas may result in incomplete com against the data given in the appropriate Lennox bustion and the formation of carbon monoxide gas. This Product Specifications bulletin. Additional informa...
Page 13: Venting Options
Schedule 40 PVC (Fittings) D2466 Schedule 40 CPVC (Pipe) F441 The EL296DFV is shipped with vent exhaust / air intake Schedule 40 CPVC (Fittings) F438 connection at the top cap. See figure 19. Using parts pro SDR-21 PVC or SDR-26 PVC (Pipe)
Page 14 12 -Install the side vent sealing plates and gaskets on the Patch Plate Top Cap exterior of the cabinet as shown in figure 21. Secure Sheet Metal with six mounting screws (four reused and two pro Patch Plate vided from bag assembly). Holes are pre-punched in the parts and cabinet, no drilling is required.
Page 15 Right Side Vent Configuration Side Vent Sealing Plate Side Vent Sealing Gaskets Exhaust Intake Street Elbows (2) FIGURE 21 TABLE 5 OUTDOOR TERMINATION USAGE* STANDARD CONCENTRIC Flush Wall Kit Wall Ring Kit Mount 1-1/2 inch 2 inch 3 inch Vent 2 inch 3 inch 2 inch...
Page 16: Joint Cementing Procedure
(but not after pipe is fully inserted) to dis tribute cement evenly. DO NOT turn ABS or cellular core pipe. If an EL296DFV furnace replaces a furnace which was commonly vented with another gas appliance, the size of NOTE - Assembly should be completed within 20 sec...
Page 17 2 - When furnace is installed in a residence where unit is 4 - Follow the lighting instructions. Turn on the appliance shut down for an extended period of time, such as a that is being inspected. Adjust the thermostat so that vacation home, make provisions for draining conden...
Page 18: Vent Piping Guidelines
Centrotherm venting system must also follow Piping Size Process the uninsulated and unconditioned space criteria listed in table 8. The EL296DFV can be installed as either a Non-Direct What is the Vent or a Direct Vent gas central furnace. furnace capacity? 045, 070, 090, NOTE - In Non‐Direct Vent installations, combustion air is...
Page 19 TABLE 7 Maximum Allowable Intake or Exhaust Vent Length 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 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”...
Page 20 TYPICAL EXHAUST PIPE CONNECTIONS Pipe size determined in table 7. 2” 2” 2” 2” 2” 3” TRANSITION INTAKE *2” EXHAUST DO NOT transition from smaller to larger pipe size in horizontal TOP VIEW runs of exhaust pipe. * When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible. NOTE −...
Page 21 TYPICAL EXHAUST CONNECTIONS WITH RIGHT SIDE VENT OPTION Pipe Length 4” Maximum (Not Furnished) 3” 2” 2” TRANSITION *2” 2” Plate (Furnished) Street Ell TOP VIEW (Not Furnished) * When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible. NOTE Intake pipe and exhaust pipe must be the same diameter.
Page 22 Intake Piping EQUIPMENT IN CONFINED SPACE The EL296DFV furnace may be installed in either direct (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) vent or non-direct vent applications. In non-direct vent applications, when intake air will be drawn into the furnace...
Page 23 12 inches doors. The EL296DFV is then classified as a direct vent, (305mm). Category IV gas furnace.
Page 24 TABLE 8 Maximum Allowable Exhaust Vent Pipe Length (in ft.) Without Insulation In Unconditioned Space For Winter Design Temperatures Two - Stage High Efficiency Furnace Unit Input Size Winter Design Vent Pipe Temperatures °F (°C) Diameter 2 in. 32 to 21 (0 to -6) 2-1/2 in.
Page 25 TABLE 9 Maximum Allowable Exhaust Vent Length Using Ventilated Attic or Crawl Space For Intake Air in Feet 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 - 10,000 ft Number Of 2”...
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 33...
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 34 Page 27...
Page 28 *090 2” (51mm) 2” (51mm) *EL296DFV-045, -070 and -090 units with the flush-mount termina tion must use the 1-1/2”accelerator supplied with the kit. 5 - On field-supplied terminations for side wall exit, ex haust piping may extend a maximum of 12 inches Inlet Air (Minimum 12in.
Page 29: Front View
PIPE SIZE TO TERMINATION 51W11 (US) or 51W12 (Canada) DIRECT VENT CONCENTRIC ROOFTOP TERMINATION FIGURE 41 71M80, 69M29 or 60L46 (US) 44W92 or 44W93 (Canada) EL296DFV DIRECT VENT APPLICATION FIGURE 38 USING EXISTING CHIMNEY STRAIGHT-CUT OR ANGLE-CUT IN DIRECTION OF ROOF SLOPE * 1-1/2”...
Page 30 FIELD FABRICATED WALL TERMINATION NOTE − FIELD−PROVIDED REDUCER MAY BE 2” (51mm) 3” (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION A− Minimum clearance above grade or average 12” (305 mm) 12” (305 mm) snow accumulation B−...
Page 31 4 - Distance between exhaust pipe terminations on mul tiple furnaces must meet local codes. EL296DFV NON-DIRECT VENT APPLICATION USING EXISTING CHIMNEY SIZE TERMINATION STRAIGHT-CUT OR ANGLE-CUT IN DIRECTION PIPE PER TABLE 10.
Page 32 Condensate Piping 1 - Determine which side condensate piping will exit the This unit is designed for either right‐ or left‐side exit of con unit, location of trap, field-provided fittings and length of densate piping. Refer to figures 46 and 47 for condensate PVC pipe required to reach available drain.
Page 33 Connection on the condensate trap and line. Heat cable kit is avail able from Lennox in various lengths; 6 ft. (1.8m) - kit no. 26K68; 24 ft. (7.3m) - kit no. 26K69; and 50 ft. (15.2m) - kit no. 26K70.
Page 34 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 35: Gas Piping
6 - In some localities, codes may require installation of a Gas Piping manual main shut‐off valve and union (furnished by in staller) external to the unit. Union must be of the ground joint type. CAUTION IMPORTANT If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe Compounds used on threaded joints of gas piping shall be installed at the gas valve and extend outside...
Page 36 Left Side Piping MANUAL (Standard) MAIN SHUT-OFF AUTOMATIC MANUAL VALVE GAS VALVE MAIN SHUT-OFF (With 1/8 in. NPT AUTOMATIC VALVE Plugged Tap GAS VALVE (With 1/8 in. NPT Shown) Plugged Tap Shown) GROUND JOINT UNION GROUND JOINT UNION DRIP LEG Right Side Piping FIELD (Alternate)
Page 37: Electrical
National Electric Code (ANSI/NFPA No. 70). A green OUTSIDE ground wire is provided in the field make-up box. CABINET NOTE - The EL296DFV furnace contains electronic components that are polarity sensitive. Make sure that the furnace is wired correctly and is properly Right Side grounded.
Page 38 38% of cool speed. field wiring connections in varying applications. If the When the EL296DFV is running in the heating mode, furnace is being matched with a heat pump, refer to the the indoor blower will run on the heating speed desig...
Page 39 ® ® iComfort Thermostat with a Non- iComfort Thermostat with an Communicating Outdoor Unit iComfortt-ENABLED Outdoor Unit ® ® icCmforti Thermostat iComfort Thermostat ® iComfort -Enabled Indoor Furnace ® iComfort -Enabled Indoor Furnace Non-Communicating Outdoor Air Conditioner iComfortt-Enabled Outdoor Air Conditioner or Heat Pump ®...
Page 40 “HUM” CONTACT IS OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDI CLOSED ANYTIME FIER (IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNC HUMIDITY DEMAND TIONS. BUILT INTO ALL iComfort by Lennox®OUTDOOR UNITS). IS PRESENT 24V HUMIDIFIER CONNECTIONS ® icomfort...
Page 41 TABLE 13 EL296 Field Wiring Applications With Conventional Thermostat DIP Switch Settings and On-Board Links (See figure 59) 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 42 TABLE 13 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (See figure 59) 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 43 TABLE 13 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (figure 59) DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
Page 44 TABLE 13 EL296 Field Wiring Applications With Conventional Thermostat (Continued) DIP Switch Settings and On-Board Links (figure 59) DIP Switch 1 Wiring Connections Thermostat On Board Links Must Be Cut To Select Thermostat Heating System Options Stages Dual Fuel FURNACE HEAT PUMP T'STAT TERM.
Page 45 EL296DFV Schematic Wiring Diagram FIGURE 58 Page 45...
Page 46: Integrated Control
Integrated Control HS/ CAI LINE 1 NEUTRAL 7 SEGMENT LED FLAME SENSE INDOOR BLOWER DIAGNOSTIC CONNECTOR PUSH BUTTON DIP SWITCHES 12 PIN LOW OUTDOOR AIR VOLTAGE SENSOR CONNECTOR TERMINALS DISCHARGE AIR W915 Y1 TO Y2 SENSOR 2 STAGE COMPR TERMINALS W951 R TO O TB83 HEAT PUMP...
Page 47 14 pro ventional Thermostat (non-communicating) vides the blower off timings that will result from different switch settings. EL296DFV units are equipped with a two-stage, variable speed integrated control. This control manages ignition TABLE 14 Blower Off Delay Switch Settings...
Page 48 TABLE 17 Ramping Option D S Motor runs at 100% until demand is satisfied. Cooling Mode Blower Speed Ramping Ramping Option Switch 9 Switch 10 S Once demand is met, motor ramps down to stop. A (Factory) 100% CFM COMPRESSOR DEMAND Ramping Option A (Factory Selection) Switches 11, 12 and 13 -- Heating Mode Blower Speed --...
Page 49 If the link is left intact the PMW signal from the Har ing only. TABLE 20 OPERATING SEQUENCE EL296DFV, Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE...
Page 50 TABLE 21 OPERATING SEQUENCE EL296DFV, Non-Communicating Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE Thermostat Demand Relative Humidity Blower System Compressor Comments Condition Status (COOL) NO CALL FOR DEHUMIDIFICATION Normal Opera Acceptable 70%*...
Page 51: Blower Motor Performance
Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 425 cfm. Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 425 cfm. EL296DF045XV36B BLOWER MOTOR WATTS (COOLING) Motor Watts @ Various External Static Pressures - in.
Page 52 Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 425 cfm. Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 425 cfm. EL296DF070XV48B BLOWER MOTOR WATTS (COOLING) Motor Watts @ Various External Static Pressures - in.
Page 53 Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 425 cfm. Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 425 cfm. EL296DF090XV60C BLOWER MOTOR WATTS (COOLING) Motor Watts @ Various External Static Pressures - in.
Page 54 Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 425 cfm. Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 425 cfm. EL296DF110XV60C BLOWER MOTOR WATTS (COOLING) Motor Watts @ Various External Static Pressures - in.
Page 55: Unit Start Up
NOTE - When unit is initially started, steps 1 through 11 The gas valve on the EL296DFV is equipped with a gas may need to be repeated to purge air from gas line. control switch. Use only your hand to move switch. Never use tools.
Page 56: Gas Pressure Measurement
NOTE - Pressure test adapter kit (10L34) is available from od begins.” Lennox to facilitate manifold pressure measurement. 5 - Gas is ignited, flame sensor proves the flame, and the 1 - Connect the test gauge positive side “+“ to manifold combustion process continues.
Page 57: Proper Combustion / High Altitude
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 58 After the EL296DFV gas furnace has been started, the fol Other Unit Adjustments lowing test should be conducted to ensure proper venting...
Page 59: Heating Sequence Of Operation
The two-stage, variable speed integrated control used in stage) gas valve continues operation. The indoor EL296DFV units has an added feature of an internal Watch blower motor is switched to the low-fire heating speed. guard control. The feature serves as an automatic reset de...
Page 60: Service
Annual Furnace Maintenance At the beginning of each heating season, and to comply 5 Check the condition and cleanliness of burners and with the Lennox Limited Warranty, your system should be heat exchanger and clean if necessary. checked as follows:...
Page 61 6 Check the cleanliness of blower assembly and clean Manual for proper operating range. Thermal Limits should be checked by restricting airflow and not dis the housing, blower wheel and blower motor if neces connecting the indoor blower. For additional details, sary please see Service and Application Note H049.
Page 62: Program Unit Capacity Size Mode
Program Unit Capacity/Size Mode − − Power-Up - Number displayed represents by integrated control unit size code (furnace model − and capacity). If three horizontal bars are displayed followed by continuous E203, furnace control does not recognize unit size code. Configure per the following: Furnace control in IDLE mode No heating, cooling or indoor fan operation)
Page 63 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...
Page 64: Repair Parts List
Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate -- Example: EL296DFV04536B. All service must be performed by a licensed pro fessional installer (or equivalent), service agency, or gas supplier.

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Lennox EL296DFV Installation Instructions Manual

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