Table Of Contents; Packaging; Introduction; General Information - Lennox MPD35ST-NM-B Installation Instructions Manual

Merit plus series direct vent gas fireplace heaters
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TABLE OF CONTENTS

Packaging .........................................Page 2
Introduction ......................................Page 2
General Information ..........................Page 2
New York City Approval .....................Page 4
Requirements for the
Cold Climate Insulation .....................Page 4
Location ............................................Page 4
Manufactured Homes ........................Page 5
Vent Termination Clearances ............Page 5
Detailed Installation Steps .................Page 8
Step 1. Framing .................................Page 8
Fireplace Specs - Peninsula ..............Page 10
Step 2. Routing Gas Line ..................Page 11
Vertical Termination Systems ............Page 12
Vent Section Length Charts ...............Page 12
Vent Restrictor Installation ................Page 13
Step 4. Field Wiring .........................Page 25
Step 6. Connecting Gas Line ...........Page 27
Step 7. Checking Operation .............Page 28
Step 10. Burner Adjustments ............Page 31
Step 11. Hood Installation .................Page 33
Finishing Requirements ....................Page 33
Installation Accessories ....................Page 34
Gas Conversion Kits .................. Page 36
This manual is part of a set of two supporting
this product. Refer to manual 875,025M for
Care & Operation information.
Please read and understand these
instructions before beginning your
installation.
2
PACKAGING LIST
The assembled vented gas fireplace heater is
packaged with:
 - One log set, with one plastic bag of ver-
miculite, is packaged in a carton located
within the firebox.
2 - One plastic bag of glowing embers located
in the control compartment.
3 - One envelope containing the literature
package, located in the firebox which
consists of the care and operation manual,
installation instructions, warranty, 8 nailing
flanges and a vent restrictor (to be applied
as shown on Page 13; restrictor is taped
to the envelope).
4 - Two hoods, taped to the top of fireplace.
5 - One Grate, located in firebox.
6 - One Electrical Outlet Kit which consists of a
junction box, 2 screws, an receptacle outlet,
an OFF/ON rocker switch and a snap bushing.
Note: All the components in the electrical kit
will Not be used by every model.
7 - Carton Support (must be removed from
the control compartment prior to first
burning).

INTRODUCTION

The Millivolt appliances have a millivolt gas
control valve with piezo ignition system which
provides safe, efficient operation. 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 have an electronic
intermittent pilot ignition system which provides
safe, efficient operation. External electrical pow-
er is required to operate these appliances.
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 com-
ponents only:
Secure Vent™ Direct Vent System Compo-
nents,
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.
These approved vent system components are
labeled for identification. DO NOT use any other
manufacturer's vent components with these
appliances. Use only the correct size venting
(4-1/2" inner & 7-1/2" outer).
These appliances comply with National Safety
Standards and are tested and listed by OMNI-
Test Laboratories, Inc. (Report No.116-F-28-5)
to ANSI Z21.88a (in Canada, CSA-2.33a), and
CAN/CGA-2.17-M91 in both USA and Canada,
as vented gas fireplace heaters.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Both millivolt and electronic versions of these
appliances are listed by OMNI-Test Labora-
tories, Inc. for installation in bedrooms and
in Manufactured Homes.
Manufactured Homes -
See Manufactured Home Requirements on
Page 5 for additional information.
WARNING: Improper installa-
tion, adjustment, alteration, ser-
vice 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.
Misc. Codes / Standards -
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 Propane Instal-
lation Code, CSA B149.1 - latest edition.
The appliance, when installed, must be elec-
trically grounded & wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI / NFPA
70-latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.

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.
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 openings
and adequate accessibility clearance for service
and proper operation. Never obstruct the front or
back viewing surfaces of the appliance.
These millivolt and electronic fireplaces 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.
These fireplaces are designed as supplemen-
tal heaters. Therefore, it is advisable to have
an alternate heat source when installed in a
dwelling.

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