Lennox EL180UHE User Manual

Page 1
INSTALLATION
INSTRUCTIONS
EL180UHE
507329-01
05/2016
Supersedes 01/2016
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
This is a safety alert symbol and should never be
ignored. When you see this symbol on labels or in man-
uals, be alert to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
© 2016 Lennox Industries Inc.
Dallas, Texas USA
Table of Contents
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
EL180UHE Gas Furnace . . . . . . . . . . . . . . . . . . . . . . . . . 3
Shipping and Packing List . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Use of Furnace as a Construction Heater . . . . . . . . . . . 4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Combustion, Dilution & Ventilation Air . . . . . . . . . . . . . . 5
Setting Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Duct System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Integrated Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Gas Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 27
High Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Proper Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Other Unit Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Repair Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Start Up Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Lennox EL180UHE Specifications

General

Efficiency	80% AFUE
Stages	Single-stage
Blower Motor	Multi-speed
Cabinet Type	Upflow/Horizontal
Fuel Type	Natural Gas or Propane
Ignition Type	Hot Surface Ignition
Heat Exchanger Warranty	20 years
Unit Warranty	5 years

Summary

Combustion and Ventilation Air

Unconfined Space Air Requirements

Confined Space Air Requirements

Details air requirements for furnaces installed in confined spaces, including openings and sizing.

Venting and Ducting

Venting Basics

Covers furnace venting requirements, including orientation of the flue transition and connection types.

Venting Configurations

Upflow and Horizontal Vent Discharges

Masonry Chimney Venting

Gas Piping and Electrical

Gas Supply and Leak Check

Details gas supply connection, torque specs, piping requirements, and leak detection procedures.

Electrical Grounding and Wiring

Emphasizes proper grounding and wiring for the furnace, especially for electronic components.

Unit Operation and Controls

Unit Start-Up Procedures

Step-by-step guide for safely starting the furnace for the first time.

Gas Pressure Adjustment and High Altitude

Procedures for adjusting gas pressure and considerations for high altitude operation.

Fan Control and Electronic Ignition

Service and Maintenance

Annual Furnace Maintenance

Cleaning the Burners