Lennox International Inc. SL280UH070V36A User Manual

Page 1

06/11

*2P0611*

506763−01

*P506763-01*

 2011 Lennox Industries Inc.

Dallas, Texas, USA

UPFLOW

HORIZONTAL LEFT

HORIZONTAL RIGHT

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.

INSTALLATION
INSTRUCTIONS
SL280UHV

DAVE LENNOX SIGNATURE

®

COLLECTION GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE

506763−01
06/2011
Supersedes 03/2011

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

This 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.

CAUTION

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

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 27.

Table of Contents

Unit Dimensions

2

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

Parts Arrangement

3

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

SL280UHV 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

9

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

Filters

12

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

Duct System

12

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

Venting

13

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

Gas Piping

23

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

Electrical

25

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

Integrated Control Settings

36

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

Blower Performance Data

39

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

Unit Start−Up

51

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

Gas Pressure Adjustment

52

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

Proper Combustion

52

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

High Altitude

53

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

Other Unit Adjustments

54

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

Heating Sequence of Operation

54

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

Service

56

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

Planned Service

59

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

Repair Parts List

59

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

Integrated Control Diagnostic Codes

60

. . . . . . . . . . . . . . . 

Program Unit Capacity/Size Mode

67

. . . . . . . . . . . . . . . . . 

Troubleshooting

68

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

Litho U.S.A.