Lennox SL280DFV - Manual

Lennox SL280DFV

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Table of Contents:

  • Page 2 – FRONT VIEW
  • Page 3 – Parts Arrangement; FIGURE 1; CONTROL BOX
  • Page 4 – Shipping and Packing List; Package 1 of 1 contains; Safety Information; DANGER; WARNING; Certifications
  • Page 5 – AIR HANDLER; Use of Furnace as Construction Heater
  • Page 6 – Product contains fiberglass wool.; CAUTION; Unconfined Space
  • Page 7 – Confined Space; FIGURE 2
  • Page 8 – FIGURE 3
  • Page 9 – Downflow Installation; SUPPLY AIR; Cabinet Width; NOTE − Downflow combustible flooring kit is not used
  • Page 10 – Setting Equipment; The unit must be level.
  • Page 11 – Filters; TABLE 3
  • Page 12 – Duct System; Return Air Plenum; Venting; Modifying or removing the flue transition will; IMPORTANT; VENT CONNECTION
  • Page 13 – Venting Using a Masonry Chimney; Common Venting Using Metal−Lined Masonry Chimney; The chimney is currently serving at least one drafthood
  • Page 14 – Connector Diameter
  • Page 19 – Gas Piping; Gas Supply
  • Page 20 – Gas Pipe Capacity − ft; NOTE − Capacity given in cubic feet (m
  • Page 21 – Leak Check; less; Electrical; Precautions and Procedures; thermostat wiring in communicating; − The power supply wiring must meet Class I restric-
  • Page 22 – Thermostat Selection; Indoor Blower Speeds; Non−Communicating; thermostat, proper indoor blower speed selec-
  • Page 25 – DIP Switch Settings and On−Board Links (See figure 25); ON
  • Page 26 – OFF
  • Page 29 – SL280DFV Schematic Wiring Diagram
  • Page 30 – TYPICAL SL280DFV FIELD WIRING DIAGRAM
  • Page 31 – Integrated Control
  • Page 34 – On−Board Links; In icomfort; On−Board Link W914 Dehum or Harmony (R to DS)
  • Page 35 – BLOWER DATA
  • Page 37 – ComfortSense
  • Page 39 – Unit Start−Up
  • Page 40 – Gas Pressure Adjustment; NOTE −; White Rodgers Gas Valve; Do not adjust low fire man-; Proper Combustion; ALL
  • Page 41 – High Altitude; Manifold Pressure Settings; Natural; High Altitude Pressure Switch Kits
  • Page 43 – HEATING OPERATION WITH TWO−STAGE THERMOSTAT; HEATING OPERATION WITH SINGLE STAGE THERMOSTAT
  • Page 44 – Service; Blower
  • Page 46 – Remove five screws if necessary
  • Page 48 – dF
  • Page 49 – Integrated Control Diagnostic Codes (continued)
  • Page 54 – LSOM − Compressor open start circuit.
  • Page 55 – Program Unit Capacity/Size Mode; FINISHED
  • Page 56 – Troubleshooting: Heating Sequence of Operation
  • Page 60 – Troubleshooting: Continuous Fan Sequence of Operation
Loading the manual

Page 1

06/11

*2P0611*

506710−01

*P506710-01*

2011 Lennox Industries Inc.

Dallas, Texas, USA

DOWNFLOW

AIR FLOW

CAUTION

As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.

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.

INSTALLATION
INSTRUCTIONS
SL280DFV

DAVE LENNOX SIGNATURE

®

COLLECTION GAS FURNACE
DOWNFLOW AIR DISCHARGE

506710−01
06/2011
Supersedes 01/2011

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

WARNING

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.

NOTICE

A thermostat is not included and must be ordered
separately.

The Lennox icomfort Touch

thermostat must be

used in communicating applications.

In non−communicating applications, the Lennox
ComfortSense

®

7000 thermostat may be used, as

well as other non−communicating thermostats.

In all cases, setup is critical to ensure proper sys-
tem operation.

Field wiring for both communicating and non−com-
municating applications is illustrated in diagrams,
which begin on Page 23.

Table of Contents

Unit Dimensions

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Arrangement

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SL280DFV Gas Furnace

4

. . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List

4

. . . . . . . . . . . . . . . . . . . . . . . .

Safety Information

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Use of Furnace as a Construction Heater

5

. . . . . . . . . . .

General

5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combustion, Dilution & Ventilation Air

6

. . . . . . . . . . . . . .

Setting Equipment

10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filters

11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Duct System

12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Venting

12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Piping

19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical

21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integrated Control Settings

32

. . . . . . . . . . . . . . . . . . . . . . .

Blower Performance Data

35

. . . . . . . . . . . . . . . . . . . . . . . .

Unit Start−Up

39

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Pressure Adjustment

40

. . . . . . . . . . . . . . . . . . . . . . . .

Proper Combustion

40

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High Altitude

41

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other Unit Adjustments

42

. . . . . . . . . . . . . . . . . . . . . . . . . .

Heating Sequence of Operation

42

. . . . . . . . . . . . . . . . . . .

Service

44

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Planned Service

47

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair Parts List

47

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integrated Control Diagnostic Codes

48

. . . . . . . . . . . . . . .

Program Unit Capacity/Size Mode

55

. . . . . . . . . . . . . . . . .

Troubleshooting

56

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Summary

Page 2 - FRONT VIEW

Page 2 Unit Dimensions − inches (mm) GAS PIPING INLET (Either Side) FLUE OUTLET (Top) ELECTRICAL INLET (Either Side) RETURN AIR OPENING FRONT VIEW SIDE VIEW TOP VIEW A B C D 3/4 (19) 27 − 3/4 (7705) 19 − 1/4 (489) 6 − 5/8 (168) Right 7 − 1/8 (181) Left 5 − 3/8 (137) Right 2 − 1/8 (54) Left 33 (838) ...

Page 3 - Parts Arrangement; FIGURE 1; CONTROL BOX

Page 3 Parts Arrangement FIGURE 1 BLOWER ASSEMBLY INTERNAL FLUE PIPE ASSEMBLY FLUE CHASE GASKET DOOR INTERLOCK SWITCH HEAT EXCHANGER COMBUSTION AIR INDUCER COMBUSTION AIR INDUCER PRESSURE SWITCHES GAS VALVE BURNER BOX ASSEMBLY INNER BLOWER ACCESS PANEL ACCESS PANEL CONTROL BOX (Includes two−stage in...

Page 4 - Shipping and Packing List; Package 1 of 1 contains; Safety Information; DANGER; WARNING; Certifications

Page 4 SL280DFV Gas Furnace The SL280DFV gas furnace is equipped with a two−stage,variable speed integrated control. the control is compat-ible with:Communicating thermostats − icomfort Touch ® . Non−communicating thermostats − ComfortSense or oth-er conventional thermostats.Control systems − Harmon...

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