Lennox Hearth MPDT-3328CPE-B User Manual

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 compart-

ment).

• Literature Kit (envelope in bottom com-

partment containing Care and Operation

Instructions, Installation Instructions, Safety-

In-Operation Warning Labels, Warranty).

• (1) 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 op-

erate on natural or propane gas. An electronic

intermittent pilot ignition system provides safe,

efficient operation. External electrical power is

required to operate these units.

These vented gas fireplace heaters are sealed

combustion, air-circulating gas fireplaces de-

signed 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 Compo-

nents manufactured by Security Chimneys

International,

•

Secure Flex™ Flexible Vent Components

manufactured by Security Chimneys Inter-

national 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" inner

and 7-1/2" 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
New York City Approval ................................ 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

infor-més 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 WARRANTY,

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