Table Of Contents; Introduction; General Information - Lennox MLDVT-30NM Care And Operation Instructions Manual

conGratuLations!
In selecting this LENNOX Direct-Vent Gas Appliance you have chosen the finest and most
dependable fireplace to be found anywhere. Its a beautiful, prestigious alternative to a
wood burning fireplace. Welcome to a Family of tens of thousands of satisfied LENNOX
Fireplace Owners.
Please carefully read and follow all of the instructions found in this manual. Please
pay special attention to the safety instructions provided in this manual. The Care and
Operation Instructions included here will assure that you have many years of dependable
and enjoyable service from your LENNOX product.

taBLe oF contents

Introduction ......................................Page 2
General Information ..........................Page 2
Gas Controls Access .........................Page 4
Operation/Care of Your Appliance .....Page 4
Variable Flame Adjustment . ...............Page 5
Maintenance . .....................................Page 6
Front Glass Enclosure Panel,
Removal and Installation . ................Page 7
Install Volcanic Stone,
Embers and Logs ...........................Page 8
Burner Flame Appearance/Sooting . ...Page 12
Burner Flame Adjustments . ...............Page 13
Millivolt Appliance Checkout .............Page 13
Electronic Appliance Checkout ..........Page 13
Warranty ...........................................Page 13
Product Reference Information . ........Page 14
Wiring Diagrams ...............................Page 14
Accessory Components ....................Page 15
Lighting Instructions - Millivolt ........Page 18
Lighting Instructions - Electronic .....Page 20
Maintenance Schedule ......................Page 22
Troubleshooting Guide - Millivolt......Page 23
Troubleshooting Guide - Electronic ..Page 24
Replacement Parts List .....................Page 25
This manual is part of a set of two supporting
this product. Refer to manual 506015-02 for
Installation Instructions.

introduction

The Fireplace models covered in this manual
are Direct-Vent sealed combustion gas fireplace
heaters designed for residential application.
Direct-Vent appliances operate with the com-
bustion chamber completely isolated from the
indoor environment.
All air for combustion is brought in from the
outside and exhaust gases are vented through
the same direct vent, co-axial (intake/exhaust)
vent system.
2
The Millivolt appliances have a millivolt gas
control valve with piezo ignition system provides
safe, efficient operation. If any optional acces-
sories which require electrical power are being
installed, the electrical power must be provided
at the time of appliance installation.
The Electronic appliances have a battery backed
up electronic intermittent pilot system that
provides safe, efficient operation. No external
electrical power is required to operate these
appliances.
These appliances comply with National Safety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-57-5)
to ANSI ZZ21.88 (in Canada, CSA-2.33), and
CAN/CGA-2.17-M91 in both USA and Canada,
as vented gas fireplace heaters.
The Installation must conform to local codes
or, in the absence of local codes, with the
National Fuel Gas Code, ANSI Z223.1/NFPA
54-latest edition, or the Natural Gas and Pro-
pane Installation Code, CAN/CSA B149.1-latest
edition. The appliance, when installed, must be
electrically grounded in accordance with local
codes or, in the absence of local codes, the
latest edition of the National Electrical Code,
ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1 - latest editions.
do not atteMpt to aLter or ModiFY
tHe construction oF tHe appLiance or
its coMponents. anY ModiFication or
aLteration MaY Void tHe WarrantY, cer-
tiFication and ListinGs oF tHis unit.
WarninG: improper installation,
adjustment, alteration, service
or maintenance can cause injury
or property damage. refer to
this manual. For assistance or
additional information consult a
qualified installer, service agency
or the gas supplier.

GeneraL inForMation

Note: Installation and repair should be per-
formed by a qualified service person. The
appliance should be inspected annually by
a qualified professional service technician.
More frequent inspections and cleanings
may be required due to excessive lint from
carpeting, bedding material, etc.
It is imperative that the control compartment,
burners and circulating air passage ways of
appliance be kept clean. See Maintenance
instructions on Page 6.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instructions
d'installation et d'utilisation qui accompagnent
l'appareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
due to high temperatures the appliance should
be located out of traffic and away from furniture
and draperies. Locate furniture and window
coverings accordingly.
the vent termination is hot while in operation
and for a period of time following the use of the
fireplace. to prevent contact with hot surfaces,
we recommend the use of a termination guard.
see page 15 for ordering information.
These fireplaces are designed as supplemen-
tal heaters. Therefore, it is advisable to have
an alternate heat source when installed in a
dwelling.
WarninG: these fireplaces are
vented heaters. do not burn
wood or other materials in these
appliances.
these appliances are designed to operate on
natural gas or propane gas only. the use of
other fuels or combination of fuels will degrade
the performance of this system and may be
dangerous.
Millivolt Models - Btu input
Millivolt models come standard with the manu-
ally-modulated gas valve; flame appearance and
heat output can be controlled at the gas valve.
The BTU Input for millivolt models is shown in
Tables 1 and 2.