Table of Contents
Advertisement
E 2012 Lennox Industries Inc.
Dallas, Texas, USA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
08/12
*2P0812*
DOWNFLOW
AIR FLOW
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . . . . .
INSTALLATION
INSTRUCTIONS
EL280DF
®
MERIT
SERIES GAS FURNACE
DOWNFLOW AIR DISCHARGE
506896−01
08/2012
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.
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
8
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
11
Page 1
WARNING
CAUTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
506896−01
*P506896-01*
Litho U.S.A.
11
16
18
23
24
25
26
26
27
28
29
30
31
Advertisement
Table of Contents
Related Manuals for Lennox EL280DF
Summary of Contents for Lennox EL280DF
-
Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS E 2012 Lennox Industries Inc. Dallas, Texas, USA EL280DF ® MERIT SERIES GAS FURNACE DOWNFLOW AIR DISCHARGE 506896−01 08/2012 Litho U.S.A. 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. -
Page 2: Unit Dimensions
Unit Dimensions − inches (mm) 3−1/8 9/16 (79) (14) RETURN AIR OPENING FLUE OUTLET 19−7/16 9/16 (Top) (494) (14) 9/16 (14) TOP VIEW 1−1/2 (38) 27−3/4 (705) Front Panel 9/16 19−7/16 9/16 (14) (494) (14) AIR FLOW ELECTRICAL INLET (Either Side) (838) 5−3/8 (137) Right GAS PIPING INLET... -
Page 3: El280Df Gas Furnace
WARNING This EL280DF furnace must be installed so that its electri- Improper installation, adjustment, alteration, service cal components are protected from water. -
Page 4: Use Of Furnace As A Construction Heater
Air is needed for proper combustion and safe unit operation. Lennox does not recommend the use of EL280DF units as When the furnace is installed in an attic or other insu- a construction heater during any phase of construction. -
Page 5: Combustion, Dilution & Ventilation Air
If sufficient combustion air is not available, the fur- this section to install EL280DF furnaces to ensure efficient nace or other appliances will operate inefficiently and un- and safe operation. You must consider combustion air safely. - Page 6 Confined Space Air from Inside If the confined space that houses the furnace adjoins a A confined space is an area with a volume less than 50 cu- space categorized as unconfined, air can be brought in by bic feet (1.42 m ) per 1,000 Btu (.29 kW) per hour of the providing two permanent openings between the two combined input rating of all appliances installed in that...
- Page 7 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 WATER FURNACE HEATER INLET VENTILATION 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 ) per 4,000 Btu (1.17 kW) per hour of the total input rating of all equipment in the enclosure.
-
Page 8: Downflow Installation
Installation on Non−Combustible Flooring (Figure 6) 1 − Cut floor opening keeping in mind clearances listed on unit rating plate. Also keep in mind gas supply connec- EL280DF UNIT tions, electrical supply, flue and air intake connections and sufficient installation and servicing clearances. -
Page 9: Setting Equipment
PROPERLY death. PLENUM SIZED FLOOR OPENING Install the EL280DF gas furnace as shipped in the down- flow position only. Do not install the furnace hori- zontally. Select a location that allows for the required clearances FIGURE 8 that are listed on the unit nameplate. Also consider gas Return Air Opening −−... -
Page 10: Filters
Horizontal Front Back FIGURE 12 Downflow Application WARNING Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum clearances for closet or al- Improper installation of the furnace can result in per- cove installations are shown in figure 13. sonal injury or death. -
Page 11: Duct System
COLLAR certification. The vent connector does not require insula- tion. The EL280DF series units are classified as fan−assisted Category I furnaces when vertically vented according to FIGURE 14 the latest edition of National Fuel Gas Code (NFPA 54 / ANSI Z223.1). - Page 12 OTHER suitable materials, or replaced with a gas vent or chimney APPLIANCE suitable for venting EL280DF series units. The chimney PERMANENTLY SEALED FIREPLACE passageway must be checked periodically to ensure that it OPENING is clear and free of obstructions.
- Page 13 7−1/2 (2.29) General Venting Requirements 6 (152) 9 (2.74) Vent all EL280DF furnaces according to these instructions: 7 (178) 10−1/2 (3.20) 1 − Vent diameter recommendations and maximum allow- 9 − If the common vertical vent is offset, the maximum...
- Page 14 19 − In no case, shall the vent connector be sized more than cated or common venting system, you must inspect the two consecutive table size diameters over the size of venting system’s general condition and look for signs the draft hood outlet or flue collar outlet. of corrosion.
- Page 15 TABLE 6 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 Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet)
-
Page 16: Gas Piping
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. - Page 17 TABLE 8 Gas Pipe Capacity − ft /hr (m /hr) Nominal Length of Pipe − feet (m) Internal Iron Pipe Diameter Size inches inches (mm) (3.048) (6.096) (9.144) (12.192) (15.240) (18.288) (21.336) (24.384) (27.432) (30.480) (mm) .622 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29)
-
Page 18: Electrical
Electric Code (ANSI/NFPA No. 70). A green ground Electrostatic discharge can affect elec- wire is provided in the field make−up box. tronic components. Take precautions to NOTE − The EL280DF furnace contains electronic compo- neutralize electrostatic charge touching your hand and tools to metal nents that are polarity sensitive. - Page 19 The following requirements must be kept in mind when 3 − When the EL280DF is operating in the low cool or the specifying a generator for use with this equipment: high cool cooling mode, the indoor blower will run on The furnace requires 120 volts + 10% (Range: 108 the corresponding cooling speed.
- Page 20 TABLE 9 Field Wiring Applications DIP Switch Settings and On−Board Links (See figure 21) W915 Thermostat Wiring Connections Two−Stage W951 DIP Switch 1 Cooling Heat Pumps 1 Heat / 1 Cool Intact Intact CONTROL OUTDOOR T’STAT TERM. STRIP UNIT NOTE − Use DIP switch 2 to set sec- ond−stage heat ON delay.
- Page 21 TABLE 9 Field Wiring Applications (Continued) DIP Switch Settings and On−Board Links (See figure 21) W915 Thermostat Wiring Connections Two−Stage W951 DIP Switch 1 Cooling Heat Pumps 2 Heat / 2 Cool Intact CONTROL OUTDOOR T’STAT TERM. STRIP UNIT 2 Heat / 1 Cool Intact Intact CONTROL...
- Page 22 EL280DF Schematic Wiring Diagram FIGURE 20 Page 22...
-
Page 23: Integrated Control
5 −− Cool Off Delay Cooling fan OFF delay FIGURE 21 EL280DF units are equipped with a two−stage integrated Switch 2 −− Second Stage Delay (Used with Single− control. This control manages ignition timing and fan off Stage Thermostat Only) −− This switch is used to deter- delays based on selections made using the control DIP mine the second stage on delay when a single−stage ther-... -
Page 24: Unit Start−Up
(factory setting) The gas valve on the EL280DF unit will be equipped with a gas control switch. Use only your hand to move the switch. Never use tools. If the switch will not turn or if the control Switch 5 −−... -
Page 25: Gas Pressure Adjustment
NOTE − Pressure test adapter kit (10L34) is available from If the unit fails to operate, check the following: Lennox to facilitate manifold pressure measurement. 1 − Is the thermostat calling for heat? 1 − Connect test gauge to manifold pressure tap (figure 2 −... -
Page 26: Proper Combustion
Table 12 shows acceptable combustion for ALL proper combustion at higher altitudes. Refer to table 13 for EL280DF models. The maximum carbon monoxide manifold pressure and table 14 for pressure switch change reading should not exceed 50 ppm and gas conversion kits. -
Page 27: Other Unit Adjustments
Other Unit Adjustments HEAT FAN-OFF TIME IN SECONDS 60sec. 90sec. Primary and Secondary Limits The primary limit is located on the heating compartment vestibule panel. The secondary limits (if equipped) are lo- cated in the blower compartment, attached to the back side of the blower. -
Page 28: Heating Sequence Of Operation
7− The combustion air inducer ramps up to high heat Heating Sequence of Operation speed. When there is a call for heat, the integrated control runs a 8− S102 high heat prove switch closes and the gas valve self check. The control checks for S10 primary limit, S21 energizes second stage heat. -
Page 29: Service
CAUTION Filters All EL280DF filters are installed external to the unit. Filters Some soaps used for leak detection are corrosive to should be inspected monthly. Clean or replace the filters certain metals. Carefully rinse piping thoroughly af- when necessary to ensure that the furnace operates prop- ter leak test has been completed. -
Page 30: Repair Parts List
EL280DF BURNER, COMBUSTION AIR INDUCER ASSEMBLY & HEAT EXCHANGER REMOVAL burner box assembly burners manifold and gas valve retention rings cross over FIGURE 24 Blower Parts Repair Parts List Blower wheel The following repair parts are available through indepen- Blower housing dent Lennox dealers. -
Page 31: Start Up And Performance Checklist
Start−Up & Performance Check List UNIT SET UP (typical) Unit Model Number_______________ Serial Number___________________ SUPPLY Line Voltage upflow furnace shown Gas Supply Pressure Filter RETURN RETURN DUCT SYSTEM GAS SUPPLY SUPPLY AIR DUCT LP/Propane Gas Natural Gas Sealed Piping Connections Tight Insulated (if necessary) Leak Tested Registers Open and Unobstructed... - Page 32 UNIT OPERATION (typical) Combustion CO SUPPLY Thermostat Gas Manifold Pressure Temperatures upflow furnace shown Filter Blower Motor Amps Duct Static RETURN RETURN COOLING MODE HEATING MODE INDOOR BLOWER AMPS______ GAS MANIFOLD PRESSURE W.C._____ TEMPERATURE DROP COMBUSTION SAMPLE CO CO PPM_______ ______ Return Duct Temperature _________ Supply Duct Temperature...