Table Of Contents; Safety And Your Fireplace - Lennox MDLX40IN-PV Care And Operation Instructions Manual

LENNOX HEARTH PRODUCTS • MONTEBELLO
Thank you for your purchase. We appreciate your business!
Please carefully read and follow all instructions in this manual.
Pay special attention to all warnings and safety information.
Following these safety, care, and operation instructions will help ensure
many years of dependable and enjoyable service from your fireplace.
Register your product online today! To help us keep you up-to-date on
product information and offers, please take a few moments to register
your product online:
www.LennoxHearthProducts.com/owner-resources/product-registration.asp
SAFETY GUARD
FREE
•
The Lennox ® SAFETY GUARD protects against
severe burns and injuries by preventing direct contact
with the front glass surface of your fireplace.
To receive your FREE SAFETY GUARD, call 1-800-655-2008
or visit www.LennoxHearthProducts.com/buying-guide/safety-guard
NOTE: Safety Guards may not be available for some older models that are no longer in production.

TABLE OF CONTENTS

Safety and Your Fireplace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Attaching the Safety-in-Operation Warnings . . . . . . . . . . . . . . . . . . . . . 5
Appliance Installation, Service, and Maintenance Notices . . . . . . . . . . . . . 6
Appliance Operation Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
BTU Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas Pressure Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Orifice Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Burn-In Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation and Care of Your Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Gas Controls / Control Compartment Access . . . . . . . . . . . . . . . . . . . . . 8
Appliance Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Purge Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Lighting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Vent Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Front Glass Enclosure Panel Removal/Installation . . . . . . . . . . . . . . . . . . 13
Log, Volcanic Stone, and Glowing Ember Placement . . . . . . . . . . . . . . . . . 14
Burner Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Flame Appearance and Sooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Air Shutter Adjustment Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Burner Air Shutter Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . 17
Electronic Appliance Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ordering Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Product Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Accessory Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Troubleshooting Guide: Electronic Gas Control System . . . . . . . . . . . . . . 24
Troubleshooting Guide: Power Vent System . . . . . . . . . . . . . . . . . . . . . . 25
Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Vent Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • CARE AND OPERATION INSTRUCTIONS
®
Hearth Products fireplace
OFFER
•
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Safety and
Your Fireplace
All parts of your Lennox
get EXTREMELY HOT!
 To prevent severe burns and injuries, install
a screen or physical barrier to prevent direct
contact with the glass.
To order a FREE Lennox
for your fireplace, see details at left.
 Follow the safety instructions below
and be sure everyone in your household
understands this burn hazard:
• The surfaces on your fireplace get
EXTREMELY HOT!
• The glass on the front
of the fireplace reaches
EXTREMELY HIGH
temperatures and can
cause severe burns if touched.
• Keep children away from an operating
fireplace. Closely supervise children in
any room where a fireplace is operating
to prevent contact with glass.
• Keep clothing, furniture,
gasoline, and other
flammable liquids away
from the fireplace.
• Even after the gas is turned OFF,
fireplace surfaces remain extremely hot.
 Be sure to attach the enclosed Safety-in-
Operation Warnings where you turn on your
fireplace, to help remind everyone of the
dangers associated with high temperatures
(see Page 5).
 Read Important Safety Information on
Page 4.
SAFETY GUARD
®