Lennox EL280DF - Manuals

Lennox EL280DF – Manual in PDF format online.

Manuals:

Manual

Manual Lennox EL280DF

Summary

Page 2 - TOP VIEW

Page 2 Unit Dimensions − inches (mm) 1 − 1/2 (38) Front Panel GAS PIPING INLET (Either Side) FLUE OUTLET (Top) ELECTRICAL INLET (Either Side) RETURN AIR OPENING TOP VIEW A B C D 3/4 (19) 27 − 3/4 (705) 19 − 1/4 (489) 6 − 5/8 (168) Right 7 − 1/8 (181) Left 5 − 3/8 (137) Right 2 − 3/16 (56) Left 33 (8...

Page 3 - DANGER; WARNING; EL280DF units are CSA International certified.

Page 3 EL280DF Gas Furnace The EL280DF gas furnace is shipped ready for installationin the downflow position fueled by natural gas. A conver-sion kit (ordered separately) is required for use in LP/Pro-pane gas applications. Shipping and Packing List Package 1 of 1 contains 1 − Assembled EL280DF unit...

Page 4 - FIGURE 1; AIR HANDLER; Use of Furnace as Construction Heater

Page 4 FIGURE 1 AIR HANDLER GAS UNIT Dampers (open during cooling operation only) Dampers (open during heating operation only) When installed, this furnace must be electrically groundedaccording to local codes. In addition, in the United States,installation must conform with the current National Ele...

Page 5 - Unconfined Space

Page 5 WARNING The State of California has determined that this prod-uct may contain or produce a chemical or chemicals,in very low doses, which may cause serious illnessor death. It may also cause cancer, birth defects or re-productive harm. Combustion, Dilution & Ventilation Air In the past, t...

Page 6 - Confined Space; FIGURE 2

Page 6 Confined Space A confined space is an area with a volume less than 50 cu-bic feet (1.42 m 3 ) per 1,000 Btu (.29 kW) per hour of the combined input rating of all appliances installed in thatspace. This definition includes furnace closets or smallequipment rooms. When the furnace is installed ...

Page 7 - FIGURE 3

Page 7 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (Inlet Air from Crawlspace and Outlet Air to Ventilated 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 equipmen...

Page 8 - Downflow Installation; CAUTION; Cabinet Width; NOTE − Downflow combustible flooring kit is not used

Page 8 Downflow Installation Downflow unit installs in three ways: on non−combustibleflooring, on combustible flooring using a downflow com-bustible flooring base, or on a reverse−flow cooling cabinet.Do not drag the unit across the floor. Installation on Non−Combustible Flooring (Figure 6) 1 − Cut ...

Page 9 - Setting Equipment; The unit must be level.

Page 9 EL280DF UNIT COOLING COIL PLENUM FIGURE 8 PROPERLY SIZED FLOOR OPENING Return Air Opening −− Downflow Units The following steps should be taken when installing ple-num: 1 − Bottom edge of plenum should be flanged with a hemmed edge (See figure 9). SECURE FROM OUTSIDE CABINET HEMMED EDGE PLENU...

Page 10 - Filters; TABLE 3

Page 10 FIGURE 12 Front Back Horizontal Downflow Application Allow for clearances to combustible materials as indicatedon the unit nameplate. Minimum clearances for closet or al-cove installations are shown in figure 13. Downflow Application Installation Clearances Top Bottom Left Side Right Side Ty...

Page 11 - Duct System; Return Air Plenum; Venting; Modifying or removing the flue transition will; IMPORTANT; VENT CONNECTION

Page 11 Duct System Use industry-approved standards (such as those pub-lished by Air Conditioning Contractors of America or Ameri-can Society of Heating, Refrigerating and Air ConditioningEngineers) to size and install the supply and return air ductsystem. This will result in a quiet and low-static ...

Page 12 - Venting Using a Masonry Chimney; Common Venting Using Metal−Lined Masonry Chimney; The chimney is currently serving at least one drafthood

Page 12 FIGURE 15 Common Venting Using Tile−Lined Interior Masonry Chimney and Combined Vent Connector MINIMUM LENGTH = AS SHORT AS PRACTICAL. FOR MAXIMUM LENGTH SEE NOTE TO LEFT INTERIOR TILE−LINEDMASONRY CHIMNEY NOTE − the chimney must be properlysized per provided venting tables orlined with list...

Page 13 - Connector Diameter

Page 13 Never connect a Category I appliance to a chimney that isservicing a solid−fuel appliance. If a fireplace chimney flueis used to vent this appliance, the fireplace opening mustbe permanently sealed.A type B or listed chimney lining system that passesthrough an unused masonry chimney flue is ...

Page 16 - Gas Piping; Gas Supply; NOTE −

Page 16 Removal of the Furnace from Common Vent In the event that an existing furnace is removed from aventing system commonly run with separate gas ap-pliances, the venting system is likely to be too large toproperly vent the remaining attached appliances. Conduct the following test while each appl...

Page 17 - NOTE − Capacity given in cubic feet (m

Page 17 TABLE 8 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) ...

Page 18 - Leak Check; than or equal to; Electrical; Precautions and Procedures; INTERIOR MAKE−UP BOX INSTALLATION

Page 18 Leak Check After gas piping is completed, carefully check all pipingconnections (factory− and field−installed) for gas leaks. Usea leak detecting solution or other preferred means. NOTE − If emergency shutoff is necessary, shut off the mainmanual gas valve and disconnect the main power to th...

Page 20 - DIP Switch Settings and On−Board Links (See figure 21)

Page 20 TABLE 9 Field Wiring Applications Thermostat DIP Switch Settings and On−Board Links (See figure 21) Wiring Connections DIP Switch 1 W915 Two−Stage Cooling W951 Heat Pumps 1 Heat / 1 Cool NOTE − Use DIPswitch 2 to set sec-ond−stage heat ONdelay.OFF10 minutes.ON−15 minutes. ON Intact Intact S1...

Page 22 - EL280DF Schematic Wiring Diagram

Page 23 - Integrated Control; TWO−STAGE INTEGRATED CONTROL; DIP SWITCH FUNCTIONS; This unit may be used

Page 23 Integrated Control FIGURE 21 TWO−STAGE INTEGRATED CONTROL THERMOSTAT CONNECTIONS (TB1) 1/4" QUICK CONNECT TERMINALS DIP SWITCH FUNCTIONS DIP SWITCHES DIAGNOSTIC LEDs ON−BOARD LINKS 1= ERROR CODE RECALLH= 24V HUMIDIFIER OUTPUTL= LENNOX SYSTEM OPERATION MONITOR SENSE = 120 VAC OUTPUT TO FL...

Page 24 - Unit Start−Up

Page 24 settings provide lower supply air temperatures; shorter set-tings provide higher supply air temperatures.Table 10 pro-vides the blower off timings that will result from differentswitch settings. TABLE 10 Heating Blower−Off Delay Switch Settings Blower Off Delay (Seconds) Switch 3 Switch 4 60...

Page 25 - Gas Pressure Adjustment; NOTE

Page 25 FIGURE 22 GAS VALVE SHOWN IN ON POSITION INLET PRESSURE POST HIGH FIRE ADJUSTMENT SCREW (under cap) MANIFOLD PRESSURE TAP 8 − Move switch on gas valve to ON . Do not force. See fig- ure 22. 9 − Replace the upper access panel. 10− Turn on all electrical power to to the unit. 11− Set the therm...

Page 26 - Proper Combustion; ALL; High Fire; High Altitude; Natural; No Change

Page 26 Proper Combustion Furnace should operate minimum 15 minutes with correctmanifold pressure and gas flow rate before checking com-bustion. Table 12 shows acceptable combustion for ALL EL280DF models. The maximum carbon monoxide reading should not exceed 50 ppm TABLE 12 Firing Rate CO 2 % For N...

Page 27 - Other Unit Adjustments

Page 27 Other Unit Adjustments Primary and Secondary Limits The primary limit is located on the heating compartmentvestibule panel. The secondary limits (if equipped) are lo-cated in the blower compartment, attached to the back sideof the blower. These auto reset limits are factory−set and re-quire ...

Page 28 - Heating Sequence of Operation; Two−Stage Thermostat, Two Stage Heat. Dip Switch

Page 28 Heating Sequence of Operation When there is a call for heat, the integrated control runs aself check. The control checks for S10 primary limit, S21secondary limit (s) and S47 rollout switch normally closedcontacts. The control also checks for S102 high heat andS128 low heat prove switch norm...

Page 29 - Service; Blower

Page 29 Service WARNING ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD. Failure to follow safety warnings exactly could resultin dangerous operation, serious injury, death orproperty damage.Improper servicing could result in dangerous opera-tion, serious injury, death, or property damage.Before servici...

Page 30 - Repair Parts List

Page 30 EL280DF BURNER, COMBUSTION AIR INDUCER ASSEMBLY & HEAT EXCHANGER REMOVAL FIGURE 24 burners burner box assembly manifold and gas valve retention rings cross over Repair Parts List The following repair parts are available through indepen-dent Lennox dealers. When ordering parts, include th...

Page 31 - Start−Up & Performance Check List; Gas Supply Pressure; Line Voltage; Filter; upflow furnace shown

Page 31 Start−Up & Performance Check List Unit Model Number_______________ Serial Number___________________ UNIT SET UP (typical) Gas Supply Pressure 1 2 2 1 SUPPLY AIR Line Voltage 3 4 5 Filter RETURN AIR RETURN AIR GAS SUPPLY Natural Gas LP/Propane Gas Piping Connections Tight Leak Tested Supp...

Page 32 - Combustion CO; Temperatures

Page 32 Contractor’s: Name_________________________Telephone_____________Checklist Completed____________________ Job Address_____−________________________________Technician’s Name___________________________________ UNIT OPERATION (typical) 1 HEATING MODE GAS MANIFOLD PRESSURE W.C._____ COMBUSTION SA...