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4

31068 Rev E

08/04

MHST36D INSTALLATION INSTRUCTIONS

WARNING!

This fireplace and its components are designed to be installed and operated as a system. Any alteration to or
substitution for items in this system, unless allowed by these installation instructions, will void the Underwrit-
ers Laboratories listing and may void the product warranty. It may also create a hazardous installation. Read
through these instructions thoroughly before starting your installation and follow them carefully throughout
your project.

1. The Heatilator fireplace system consists of the

following:

a.

Fireplace/Integral Grate/Outside Combustion Air
System

b.

Refractory

c.

Chimney Termination Cap

d.

Chimney System

e.

Hearth Extension

f.

Glass Doors

The CP311 Convenience Pack has been designed for
the convenience of customers wishing to install a
chimney system at the 11 ft minimum straight height.
The CP313 Convenience Pack has been designed for
those wishing to install a chimney system at the 13 ft
minimum straight height.

The following combination of listed parts are included
in both the CP311 and CP313 Convenience Packs:

Note:

 

Illustrations used throughout these instructions

reflect “typical installations” and are for design purposes
only.  Actual installation may vary slightly due to indi-
vidual design preferences. However, minimum and maxi-
mum clearances must be maintained at all times.

The illustrations and diagrams used throughout these
installation instructions are not drawn to scale.

Figure 1 - A Typical Fireplace System

B. DESCRIPTION OF THE FIREPLACE SYSTEM

A.  LISTINGS AND CODE APPROVALS

This fireplace system has been tested and listed in
accordance with 

UL 127

 standards, and has been listed by

Underwriters Laboratories Inc. for installation and operation
in the United States as described in this manual.

This fireplace has been tested and listed for use with the
optional components listed on page 5. These optional
components may be purchased separately and installed at
a later date. However, installation of an outside air kit will
require significant reconstruction and should be installed
at the time of the initial fireplace installation.

Check with your local building code agency prior to installing
this fireplace to ensure compliance with local codes,
including the need for permits and follow-up inspections. If
you need assistance during installation, please contact your
local dealer or the Heatilator Technical Services
Department, Hearth & Home Technologies, 1915 W.
Saunders St., Mt. Pleasant, Iowa 52641 (1-800-927-6841).

Heatilator® is a registered trademark of Hearth & Home
Technologies.

2. Optional Components Include:

a.

Chimney Air Kit

b.

Glass Doors

Manufactured Housing Convenience Packs

Cat. #

CP311

Qty.

CP313

Qty.

Description:

SL324

1

2

 Chimney Section - 24 in. long

SL336

2

2

 Chimney Section - 36 in. long

MH842

1

1

 Roof Thimble and Flashing

TR344

1

1

 Round Termination Cap

Summary of Contents for MHST36D

Page 1: ...injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or the gas supplier INSTALLATION OPERATING INSTRUCTIONS MHST36D WO...

Page 2: ...problems that may result from the lack of adequate combustion air It is the responsibility of the builder contractor to ensure that adequate combustion air has been provided for the fireplace 4 The f...

Page 3: ...the home If you desire to put a fireplace in your basement we recommend that you consider a direct vent gas fireplace Basements always have a significant negative air pressure that causes the firepla...

Page 4: ...arances must be maintained at all times The illustrations and diagrams used throughout these installation instructions are not drawn to scale Figure 1 A Typical Fireplace System B DESCRIPTION OF THE F...

Page 5: ...ral Grate Outside Air Kit and Hearth Protection Strips DM1036 Bi fold Glass Doors Black Finish DM1036B Bi fold Glass Doors Polished Brass Finish included with fireplace DM1036S Bi fold Glass Doors Sta...

Page 6: ...g SL324 Chimney Section 24 in long SL336 Chimney Section 36 in long SL348 Chimney Section 48 in long SL315 Chimney Offset Return 15 deg SL330 Chimney Offset Return 30 deg JB877 Chimney Joint Band CB87...

Page 7: ...ashing 6 12 to 12 12 Pitch RF371 Roof Flashing Flat to 6 12 Pitch CAK4A Chimney Air Kit Firestop Spacer Catalog A B FS338 0 deg 14 1 2 in FS339 15 deg 18 3 8 in FS340 30 deg 23 in Catalog A B SL306 6...

Page 8: ...supply Figure 2 Fireplace Locations D PRE INSTALLATION PREPARATION 1 Fireplace Locations and Space Requirements Several options are available to you when choosing a location for your fireplace This fi...

Page 9: ...e precautions will reduce the possibility of fireplace smoking or air flow reversal WARNING To prevent contact with sagging or loose insulation the fireplace must not be installed against vapor barrie...

Page 10: ...ST36D fireplace will fit a framed opening of 41 in wide x 42 in tall The finished cavity depth must be no less than 23 in Figure 3 shows a typical framing using 2 x 4 lumber of the fireplace assuming...

Page 11: ...ded area E CHIMNEY REQUIREMENTS When planning your fireplace location the chimney construction and necessary clearances must be considered The fireplace system and chimney components have been tested...

Page 12: ...measured from the base of fireplace to top of starter col lar 47 1 4 in Example Your A dimension from Figure 5 is 14 1 2 in Using Table 1 the dimension closest to but not less than 14 1 2 in is 14 5...

Page 13: ...ntal distance from the side of the chimney to the peak of the roof is 10 ft or less the top of the chimney must be at least 2 ft above the peak of the roof but never less than 3 ft in overall height a...

Page 14: ...instructions for framing on pages 8 11 Slide the fireplace into position Be sure to provide the minimum air clearance at the sides and back of the fireplace assembly 2 Place the Protective Metal Hear...

Page 15: ...op bead on the lower section The inner flue is placed to the inside of the flue section below it The outer casing is placed outside the outer casing of the chimney section below it See Figure 8 5 Inst...

Page 16: ...ney system a Bend the tabs at the top of the attic insulation shield inward This will help keep the chimney section centered in the shield b Position the shield over the vertical chimney section where...

Page 17: ...n The extension should overlap the thimble one inch c To attach the extension to the thimble drill 1 8 in holes through the outer shield of the thimble using the predrilled holes in the extension as g...

Page 18: ...wn 10 Install the Outside Air Kit The outside air kit is supplied as a standard feature with this fireplace and its use is required to minimize the effects of negative pressure within the structure It...

Page 19: ...n this specific model fireplace Unless the unvented gas log heater is tested and listed for use in this factory built fireplace a fire hazard may be created that can result in a structure fire 13 Gas...

Page 20: ...n must be installed with all fireplaces to protect the combustible floor in front of the fireplace from both radiant heat and sparks The construction of and materials used for a hearth extension are s...

Page 21: ...of steel iron brick tile concrete slate glass or plasters or any combination thereof c Noncombustible Sealant Material Sealants which will not ignite and burn General Electric RTV103 Black or equivale...

Page 22: ...or Installation in Vented Fireplaces ANSI Z21 60 When operating your fireplace the flue damper must be in the open position This fireplace was not tested and listed for use with an unvented gas log he...

Page 23: ...a greater density than soft woods A piece of hardwood will contain about 60 more BTU s than an equal size piece of soft wood Firewood is commonly sold by the cord 128 cu ft A cord of seasoned oak hard...

Page 24: ...wood to allow air to circulate freely around and through the woodpile b Elevate the woodpile off the ground to allow air circulation underneath c The smaller the pieces the faster the drying process...

Page 25: ...y is clean and free of creosote buildup Make sure overhanging trees and branches are cut back within ten feet of the top of the chimney Ensure the chimney cap is clean and free of any buildup of soot...

Page 26: ...ed If creosote has accumulated it should be removed to reduce the risk of a chimney fire 3 Chimney Cleaning If you do detect a buildup of creosote contact a qualified chimney sweep or clean it yoursel...

Page 27: ...s Knockout Location 6 Gas Log Lighter Provisions 19 General Information 22 Glass Doors 5 21 23 Grate 5 23 H Hearth Extension 20 Positioning 21 I Installation Fireplace 14 Insulation Shield 16 J Joint...

Page 28: ...haust fans or forced air furnaces or other causes 5 use of fuels other than those specified in the Operating Instructions 6 installation or use of components not supplied with the Fireplace or any oth...

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