Lennox SL280UHV User Manual (English)

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Page 1

06/11

*2P0611*

506763−01

*P506763-01*

 2011 Lennox Industries Inc.

Dallas, Texas, USA

UPFLOW

HORIZONTAL LEFT HORIZONTAL RIGHT

AIR FLOW

AIR FLOWAIR FLOW

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.

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Lennox SL280UHV Specifications

General

Model	SL280UHV
Type	Gas Furnace
Efficiency Rating	80% AFUE
Blower Type	Variable Speed
Motor Type	Variable Speed ECM
Vent Type	Direct Vent
Fuel Type	Natural Gas
Stages	Two-Stage
Warranty	Limited Lifetime Heat Exchanger warranty, 5-Year Limited Warranty on covered components. This product may be eligible for valuable 10-Year Limited Extended Warranty coverage with product registration.