2
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
• (1 set) Logs (packaged in a carton inside
the firebox).
• (1 bag) Glowing Embers (in bottom
compartment).
• Literature Kit (envelope in bottom
compartment containing Care and
Operation Instructions, Installation
Instructions, Safety-In-Operation Warning
Labels, Warranty).
• (1) U-Shaped Vent Restrictor (attached to
Literature Kit envelope).
• (1) Hood (inside firebox).
INTRODUCTION
The Millivolt appliances have a millivolt gas
control valve with piezo ignition system. If
any optional accessories that will require
electrical power are to be installed, the
electrical power must be provided at the time
of appliance installation.
The Electronic appliances are designed
to operate on natural or propane gas. An
electronic intermittent pilot ignition system
provides safe, efficient operation. External
electrical power is required to operate these
units. In the event of a power outage, four (4)
"AA" batteries (in battery holder) provide
backup power for appliance operation
(excluding [optional] blower).
These vented gas fireplace heaters are sealed
combustion, air-circulating gas fireplaces
designed for residential applications.
Approved Vent Components
These fireplaces are designed, tested and
listed for operation and installation with the
following vent components only:
• Secure Vent
®
Direct-Vent System
Components manufactured by Security
Chimneys International,
• Secure Flex
®
Flexible Vent Components
manufactured by Security Chimneys
International and
• Z-FLEX
®
Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
Use only the correct size venting (4 1/2 in.
inner and 7 1/2 in. outer).
These approved vent system components are
labeled for identification. DO NOT use any
other manufacturer’s vent components with
these appliances.
TABLE OF CONTENTS
Packaging .................................................... 2
Introduction ................................................. 2
General Information ..................................... 2
Requirements for the
Commonwealth of Massachusetts ............ 4
Cold Climate Insulation ................................ 5
Manufactured Home Requirements ............. 5
Location 5
Vent Termination Clearances ....................... 6
Appliance and Vent Clearances .................... 8
Pre-Installation Steps ................................. 10
Typical Installation Sequence .................... 10
Detailed Installation Steps .......................... 10
Step 1. Framing .......................................... 10
Fireplace and Framing Specifications ....... 11
Step 2. Routing Gas Line ........................... 12
Step 3. Preparing Appliance Vent Collar ..... 13
Step 4. Installing Vent System ................... 13
Vertical Termination Systems .................. 14
Vent Section Length Chart ...................... 14
Vertical Vent Tables and Figures .............. 17
Horizontal Termination System ............... 19
Horizontal Vent Tables and Figures ......... 21
Venting Using Flexible Vent Pipe ............. 24
Step 5. Field Wiring ................................... 25
Step 6. Optional Blower Kit Wiring ............ 26
Step 7. Connecting Gas Line ..................... 26
Step 8. Verifying Appliance Operation ........... 27
Step 9. Installing Logs ............................. 28
Step 10. Remove/Install Glass Door .......... 32
Step 11. Burner Adjustments ..................... 32
Step 12. Hood Installation .......................... 34
Finishing Requirements ............................. 34
Step 13. Attaching Safety-in-Operation
Warnings ................................................. 35
Installation Accessories ............................. 36
Gas Conversion Kits ................................... 38
Please read and understand these
instructions before beginning your
installation.
Children and adults should be alerted to
the hazards of high surface temperature
and should stay away to avoid burns or
clothing ignition.
Les enfants et les adultes devraient
être informés des dangers que posent
les températures de surface élevées
et se tenir à distance afin d’éviter des
brûlures ou que leurs vêtements ne
s’enflamment.
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE
OR ITS COMPONENTS. ANY MODIFICATION
OR ALTERATION MAY VOID THE WAR-
RANTY, CERTIFICATION AND LISTINGS OF
THIS UNIT.
WARNING
Young children should be care-
fully supervised when they are
in the same room as the appli-
ance. Toddlers, young children
and others may be susceptible
to accidental contact burns. A
physical barrier is recommended
if there are at risk individuals in
the house. To restrict access to
a fireplace or stove, install an
adjustable safety gate to keep
toddlers, young children and
other at risk individuals out of
the room and away from hot
surfaces.
AVERTISSEMENT
Les jeunes enfants devraient être
surveillés étroitement lorsqu’ils
se trouvent dans la même pièce
que l’appareil. Les tout petits,
les jeunes enfants ou les adultes
peuvent subir des brûlures s’ils
viennent en contact avec la sur-
face chaude. Il est recommandé
d’installer une barrière physique
si des personnes à risques habi-
tent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécu-
rité; cette mesure empêchera les
tout petits, les jeunes enfants et
toute autre personne à risque
d’avoir accès à la pièce et aux
surfaces chaudes.
GENERAL INFORMATION
To Next Page
Loading...
Need help?
General
