Litho U.S.A.
Page 1
504,626M
*P504626M*
06/04
*2P0604*
2002 Lennox Industries Inc.
Dallas, Texas, USA
®
General
These instructions are intended as a general guide and do
not supersede local codes in any way. Only qualified tech-
nicians can install and service the Lennox Elite
®
Series
OHR23 oil furnaces. In Canada, refer to CSA B139 for rec-
ommended installation procedures. Consult authorities
who have jurisdiction before installation.
CAUTION
Never burn garbage or paper in the heating system.
Never leave papers near or around the unit.
Shipping & Packing List
1− Assembled oil furnace
1− Draft control
Check the components for shipping damage. If you find any
damage, immediately contact the last carrier.
WARNING
Improper installation, adjustment, alteration, ser-
vice, or maintenance can cause injury or property
damage. Refer to this manual. For assistance or
additional information, consult a qualified installer
or service agency.
INSTALLATION
INSTRUCTIONS
OHR23 SERIES UNITS
OIL UNITS
504,628M
38152A061
06/04
Supersedes 4/02
Table of Contents
General
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OHR23 Unit Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . .
Oil Burner Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . . .
Requirements
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply & Return Air Plenums
5
. . . . . . . . . . . . . . . . . . . . . .
Optional Filter Kit
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Set−Up of Unit
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Venting
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue Connections
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Supply Lines Sizing
11
. . . . . . . . . . . . . . . . . . . . . . . . .
Oil Supply Line & Filter Connections
12
. . . . . . . . . . . . . .
Leak Check
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Wiring
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start−Up & Adjustments
13
. . . . . . . . . . . . . . . . . . . . .
Service
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up & Performance Checklist
15
. . . . . . . . . . . . . . . .
Troubleshooting
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
CAUTION
Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other ap-
pliance.
CAUTION
When venting this appliance, keep vent terminal free
of snow, ice and debris.
