Lennox International Inc SL280DFV installation instructions Gas Pipe Capacity − ft3/hr m3/hr

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TABLE 11

Gas Pipe Capacity − ft3/hr (m3/hr)

Nominal

Internal

 

 

 

 

Length of Pipe − feet (m)

 

 

 

Iron Pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diameter

 

 

 

 

 

 

 

 

 

 

 

Size

 

 

 

 

 

 

 

 

 

 

 

inches

10

20

30

40

 

50

60

70

80

90

100

inches

 

(mm)

(3.048)

(6.096)

(9.144)

(12.192)

 

(15.240)

(18.288)

(21.336)

(24.384)

(27.432)

(30.480)

(mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2

.622

175

120

97

82

 

73

66

61

57

53

50

(12.7)

(17.799)

(4.96)

(3.40)

(2.75)

(2.32)

 

(2.07)

(1.87)

(1.73)

(1.61)

(1.50)

(1.42)

 

 

 

 

 

 

 

 

 

 

 

 

 

3/4

.824

360

250

200

170

 

151

138

125

118

110

103

(19.05)

(20.930)

(10.19)

(7.08)

(5.66)

(4.81)

 

(4.28)

(3.91)

(3.54)

(3.34)

(3.11)

(2.92)

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1.049

680

465

375

320

 

285

260

240

220

205

195

(25.4)

(26.645)

(919.25)

(13.17)

(10.62)

(9.06)

 

(8.07)

(7.36)

(6.80)

(6.23)

(5.80)

(5.52)

 

 

 

 

 

 

 

 

 

 

 

 

 

1−1/4

1.380

1400

950

770

660

 

580

530

490

460

430

400

(31.75)

(35.052)

(39.64)

(26.90)

(21.80)

(18.69)

 

(16.42)

(15.01)

(13.87)

(13.03)

(12.18)

(11.33)

 

 

 

 

 

 

 

 

 

 

 

 

 

1−1/2

1.610

2100

460

1180

990

 

900

810

750

690

650

620

(38.1)

(40.894)

(59.46)

(41.34)

(33.41)

(28.03)

 

(25.48)

(22.94)

(21.24)

(19.54)

(18.41)

(17.56)

 

 

 

 

 

 

 

 

 

 

 

 

 

2

2.067

3950

2750

2200

1900

 

1680

1520

1400

1300

1220

1150

(50.8)

(52.502)

(111.85)

(77.87)

(62.30)

(53.80)

 

(47.57)

(43.04)

(39.64)

(36.81)

(34.55)

(32.56)

 

 

 

 

 

 

 

 

 

 

 

 

 

2−1/2

2.469

6300

4350

3520

3000

 

2650

2400

2250

2050

1950

1850

(63.5)

(67.713)

(178.39)

(123.17)

(99.67)

(84.95

 

(75.04)

(67.96)

(63.71)

(58.05)

(55.22)

(52.38)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

3.068

11000

7700

6250

5300

 

4750

4300

3900

3700

3450

3250

(76.2)

(77.927)

(311.48)

(218.03)

(176.98)

(150.07)

 

(134.50)

(121.76)

(110.43)

(104.77)

(97.69)

(92.03)

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE − Capacity given in cubic feet (m3 ) of gas per hour and based on 0.60 specific gravity gas.

Left Side Piping

AUTOMATIC

(Standard)

 

 

GAS VALVE

MANUAL

AUTOMATIC

(with manual

shut−off valve)

MAIN SHUT−OFF

GAS VALVE

 

VALVE

(with manual

 

 

shut−off valve)

 

GROUND

 

 

JOINT

 

 

UNION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROVIDED

DRIP LEG

 

AND INSTALLED

MANUAL

MAIN SHUT−OFF

VALVE

GROUND

JOINT

UNION

DRIP LEG

Right Side Piping

(Alternate)

NOTE − BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET

FIGURE 17

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Contents Installation Instructions SL280DFV Table of ContentsUnit Dimensions − inches mm TOP ViewParts Arrangement Shipping and Packing List Safety InformationSL280DFV Gas Furnace Use of Furnace as Construction Heater GeneralCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment Confined Space ALL AIR from Outside Equipment in Confined Space ALL AIR from OutsideEquipment in Confined Space Downflow Installation NON−COMBUSTIBLE Floor Opening SizeSetting Equipment SL280DFV UnitCooling Coil Properly Plenum Sized Floor OpeningFilters Duct System VentingTables for installations −1/2 MIN MAX 126 FAN + FAN FAN + NAT 168 Gas Piping Carbon Monoxide Poisoning HazardGas Pipe Capacity − ft3/hr m3/hr Electrical MAKE−UP BOXNon−Communicating Icomfortt Integrated Control Outdoor Unit Icomfort Touch System Wiring 120V ConnectionsApplications 24V Humidifier ConnectionsSL280 Field Wiring Applications With Conventional Thermostat OFF Single Stage Thermostat w Dual fuel capa Bilities SL280DFV Schematic Wiring Diagram Typical SL280DFV Field Wiring Diagram Integrated Control + = Data High Connection − = Data LOW Connection−10% approx OFF On−Board Links Blower Data 1400 Operating System Demand System Response Sequence VAC Room Thermostat Calls for First Stage Cooling Unit Start−Up GAS Valve Shown in on PositionGas Pressure Adjustment Proper CombustionManifold Pressure Settings High AltitudeOther Unit Adjustments Heating Sequence of OperationHeating Operation with TWO−STAGE Thermostat SECService Electrical SHOCK, Fire Or Explosion HazardSL280DFV BURNER, Combustion AIR Inducer Assembly Page Planned Service Repair Parts ListIntegrated Control Diagnostic Modes Integrated Control Diagnostic CodesEquipment is unable to communicate. Indicates Reconfigure the system. Replace control if heating Low pressure switch failed open To flame failure Limiters to protect the motor from damage caused Sor run cycle, or after power reset Program Unit Capacity/Size Mode Volt power−up of the furnace control,Troubleshooting Heating Sequence of Operation Call for FIRST−STAGE HeatCall for SECOND−STAGE Heat Call for Heat SatisfiedCall for Heat Satisfied FIRST−STAGE Heat SECOND−STAGE Heat 2ND Stage HeatTroubleshooting Cooling Sequence of Operation Call for CoolingTroubleshooting Continuous Fan Sequence of Operation Call for FAN
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DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV specifications

Lennox International Inc has made a significant mark in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. One of its standout products is the SL280DFV model, a high-efficiency gas furnace designed to meet the needs of modern homes.

The SL280DFV boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners. The high efficiency not only reduces energy bills but also lessens the environmental impact by minimizing greenhouse gas emissions.

One of the key features of the SL280DFV is its two-stage gas valve operation. This technology allows the furnace to operate at two levels of heating output: low stage for milder days and high stage for extremely cold temperatures. This adaptability enhances comfort by maintaining more consistent indoor temperatures while also saving energy when full power is unnecessary.

Another innovative aspect of the SL280DFV is its variable-speed blower motor. This smart technology enables the furnace to adjust airflow based on the heating needs of a home, which promotes quiet operation and improved temperature consistency throughout living spaces.

The SL280DFV is equipped with a durable heat exchanger that is designed to withstand the rigors of daily use, contributing to the unit’s longevity. Additionally, the furnace features a smart ignition system that ensures reliable start-ups, so homeowners can depend on it through the coldest winter nights.

Safety is also a priority in the design of the SL280DFV. It includes various safety features such as a built-in flame sensor and advanced venting system, designed to avert hazardous situations and ensure optimal operation.

Furthermore, Lennox offers convenient installation and maintenance support, making the SL280DFV not only an efficient heating solution but also a practical choice for homeowners. With its blend of advanced technology, high efficiency, and reliability, the Lennox SL280DFV is an appealing option for those looking to upgrade their home’s heating system, promising comfort and peace of mind for many winters to come.
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