Heart & Home Collectables MHC36, MHR36 User Manual
INSTALLATION & OPERATING
INSTRUCTIONS
MHC36 MHR36
WOODBURNING FIREPLACE
FOR MANUFACTURED HOUSING
Note: An arrow () found in the text signifies change in content.
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.
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
Safety Precautions ....................................................................................................................................... 2
Design and Installation Considerations ........................................................................................................ 3
A. Listings and Code Approvals ........................................................................................................................ 4
B. Description of the Fireplace System ............................................................................................................. 4
C. System Components .................................................................................................................................... 5
D. Pre-Installation Preparation .......................................................................................................................... 8
E. Chimney Requirements .............................................................................................................................. 11
F. Installation of Fireplace............................................................................................................................... 14
G. Operating Instructions ................................................................................................................................22
H. Maintenance Instructions ........................................................................................................................... 26
Index ........................................................................................................................................................... 27
Warranty ..................................................................................................................................................... 28
CAUTION:
Do not expose the fireplace to the elements (i.e. rain, etc.) and keep the fireplace dry at all times. Wet insulation
will produce an odor when the fireplace is used.
WARNING!
This fireplace is tested and listed for use only with the optional accessories listed in these instructions. Use of
optional accessories not specifically tested for this appliance could void the warranty and/or result in a safety
hazard.
Safety Precautions
1. Please read these installation instructions completely before beginning installation procedures. Failure to follow them
could cause a fireplace malfunction resulting in serious injury and/or property damage.
2. Always check your local building codes prior to installation. The installation must comply with all local, regional, state
and national codes and regulations.
3. An adequate supply of replacement combustion air from outside the house must be available to the fire for the
fireplace to operate properly. To achieve this, the use of the optional outside air kit is highly recommended.
In the event the home is unusually tightly sealed, the optional combustion air kit may not provide all the air required
to support combustion. Hearth & Home Technologies is not responsible for any smoking or related 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 fireplace must be installed with the Hearth & Home Technologies SL Series Chimney System.
The chimney system must always terminate outside the building. Be sure to follow all chimney specifications given in
these installation instructions.
5. NEVER leave children unattended when there is a fire burning in the fireplace.
6. This fireplace is built for solid fuel only. NEVER use gasoline, gasoline type lantern fuel, kerosene, charcoal light fluid,
or similar liquids in this fireplace. Keep any flammable liquids a safe distance from the fireplace.
7. DO NOT use chimney cleaners or flame colorants in your fireplace.
8. The flue damper must be open at all times when the fireplace is in use.
9. While servicing this fireplace, always shut off any electricity or gas to the fireplace. This will prevent possible electric
shock or burns. Also, make sure the fireplace is completely cooled before servicing.
10. To ensure a safe fireplace system and to prevent the build up of soot and creosote, inspect and clean the fireplace
and chimney prior to use and periodically during the burning season. See “Maintenance Instructions” in this manual
for cleaning instructions.
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
DESIGN AND INSTALLATION CONSIDERATIONS
When selecting a location for your woodburning fireplace, it is important to evaluate a number of considerations. Modern
construction techniques can create conditions that may not allow your chimney to draft properly. This may result in smoke
spillage from your fireplace, as well as cause other combustion appliances to operate incorrectly.
Tightly sealed construction is important for energy efficiency. Unfortunately, a great deal of effort has been directed to
tightening up sidewall construction, while considerably less attention has been paid to tightening upper portions of the
warm air envelope (insulated ceilings). This has increased the “Stack Effect”, a condition that increases the negative
pressure generated by the structure. This negative pressure will directly affect the drafting performance of a fireplace
chimney. To minimize the negative pressure generated by stack effect, make certain that all duct work installed in the attic
spaces is sealed airtight. Minimize the number of recessed light fixtures installed in the insulated ceiling, and use sealed
recessed light fixtures. Finally, make certain the whole house fans and attic access panels are tightly sealed. These are
important design considerations that must be observed during the design and construction stage of 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 fireplace system to be more susceptible to smoke spillage
and cold flue back drafting. Since direct vent gas fireplaces are sealed, they are not affected by the negative pressure that
exists in basements.
Finally, woodburning fireplaces perform best when their chimney (roof termination) is located on the upper half of the roof,
especially when cathedral ceilings are present. Chimneys that are located on the lower half of the roof realize what is
known as “lazy flue” and will not draft as well as a chimney that is located in the upper portion of the roof. The reason for
this is that the stack effect generated by the overall height of the living spaces inside the house will exceed the draft
generated by the chimney system. If you desire to place a woodburning fireplace in a location where the termination cap
would be located on the lower half of a roof, such as on an outside wall at the base of a cathedral ceiling, we recommend
that you consider using a direct vent gas fireplace. This will assure the homeowner a fireplace that operates correctly.
These properties do not affect just your woodburning factory built fireplace. They can cause any woodburning fireplace as
well as any conventionally vented (B-vent) gas appliance to operate improperly. Careful planning at this stage of your
project will ensure satisfaction with the operation of your fireplace once it is completed.
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
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.
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 Inc., 1915 W.
Saunders St., Mt. Pleasant, Iowa 52641 (1-800-843-2848).
Heatilator® is a registered trademark of Hearth & Home
Technologies Inc.
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 Underwriters 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.
B. DESCRIPTION OF THE FIREPLACE SYSTEM
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
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 individual
design preferences. However, minimum and maximum
clearances must be maintained at all times.
The illustrations and diagrams used throughout these
installation instructions are not drawn to scale.
CP311 & CP313 Convenience Packs
Cat. # Qty. Description:
SL324 2 Chimney Secti o n - 2 4 i n. long
SL336 2 Chimney Secti o n - 3 6 i n. lo ng
MH842 1 Roof Thimble and Flashing
TR344 1 Round Termination Cap
2. Optional Components Include:
a. Glass Doors
b. Fan Kit (MHC36 only)
Figure 1 - Typical Fireplace System
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C. SYSTEM COMPONENTS
1. Fireplace Components
Catalog # Description:
MHR36 Radiant Fireplace, with Integral Grate, Hearth Protection Strips and Outside Air Kit
MHC36 Circulating Fireplace, with Integral Grate, Hearth Protection Strips, Fan Kit and Junction Box
DM1036 Bi-fold Glass Doors - Black Finish
DM1036B Bi-fold Glass Doors - Polished Brass Finish (included with fireplace)
DM1036S Bi-fold Glass Doors - Stainless Steel Finish
DP1036 Peception Glass Doors - Black Finish
DP1036B Perception Glass Doors - Polished Brass Finish
DP1036S Perception Glass Doors - Stainless Steel Finish
FK22* Fan Kit (MHC36 only)
JK9* Junction Box (MHC36 only)
BC10 Fan Motor Rheostat Control (MHC36 only)
HX3 Hearth Extension
GR16 Integral Grate (included with fireplace)
Outside Air Kit (included with fireplace)
*The junction box and fan kit should be installed at the time of initial fireplace installation.
Otherwise, significant reconstruction will be required. Refer to the installation instructions included
with the JK9 and FK22 for proper installation.
Bi-Fold Glass Doors
DM1036
DM1036B
DM1036S
HX3 - Hearth Extension
GR16 - Integral Grate
BC10 - Fan Motor
Rheostat Control
(MHC36 only)
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Perception Glass Doors
DP1036
DP1036B
DP1036S
FK22 - Fan Kit (MHC36 only)
MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
Fireplace Dimensions
2. Chimney Components
The following pictures show only those chimney components which may be safely used with this fireplace.
Catalog # Description:
SL306 Chimney Section - 6 in. long
SL312 Chimney Section - 12 in. long
SL318 Chimney Section - 18 in. long
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 C himney Joint Band
CB876 Chimney Bracket
TR344 Round Termination Cap
CP311 Manufactured Housing Conveni e nce Pack - 11 ft
CP313 Manufactured Housing Convenience Pack - 13 ft
MH841 Manufactured Housing 20 in. Thimble Extension
MH842 Manufactured Housing Thimble and Flashing
AS 8 Attic Insulation Shield
RF370 Roof Flashing - 6/12 to 12/12 Pitch
RF371 Roof Flashing - Flat to 6/12 Pitch
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Chimney Sections
Catalog # A B
SL306 6 in. 4-3/4 in.
SL312 12 in. 10-3/4 in.
SL318 18 in. 16-3/4 in.
SL324 24 in. 22-3/4 in.
SL336 36 in. 34-3/4 in.
SL348 48 in. 46-3/4 in.
A = Actual Length
B = Effective length (length of
chimney part after it has
been snapped to another)
Firestop Spacer
MH842-Roof Thimble & Flashing
MH841
CB876
Chimney Bracket
JB877-Joint Band
Catalog # A B
FS338 0-deg. 14-1/2 in.
FS339 15-deg. 18-3/8 in.
FS340 30-deg. 23 in.
Outside Air Kit
SL330 - Offset/Return
TR344
Round Termination Cap
with Storm Collar
AS8
Attic Insulation Shield
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RF370-Roof Flashing
6/12 to 12/12 Pitch
RF371-Roof Flashing
Flat to 6/12 Pitch
MHC36 AND MHR36 INSTALLATION INSTRUCTIONS
D. PRE-INSTALLATION PREPARATION
1. Fireplace Locations and Space Requirements
Several options are available to you when choosing a location for your fireplace. This fireplace may be used as a
room divider, installed along a wall or across a corner. See Figure 2.
Locating the fireplace in a basement, near frequently opened doors, central heat outlets or returns, or other locations
of considerable air movement can affect the performance and cause intermittent smoke spillage from the front of the
fireplace. Consideration should be given to these factors before deciding on a location.
CLEARANCES!
A minimum 1 in. air clearance
must be maintained at the
back and sides of the fireplace assembly except at the
nailing flange where the
clearance is 1/2 in.
Chimney sections at any level
require a 2 in.minimum air
space clearance between the
framing and chimney section.
Figure 2 - Fireplace Locations
WARNING!
1. Do not install in sleeping rooms.
2. Combustion air needs of a heavily fired fireplace may deplete the available oxygen supply.
CAUTION:
The structural integrity of the manufactured
housing floor, wall, ceiling and roof must be
maintained.
WARNING!
For all manufactured housing installations the outside air kit, glass door kit and MH842 manufactured
housing roof thimble and flashing kit, must be used.
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Figures 3 and 4 show two typical installations assuming an outside air kit is being used. Therefore, an allowance must
be made for 90-deg bends. Less space is required when ducting goes directly outside without forming elbows.
These are rough framing
dimensions only.
Figure 3
Installation Along a Wall
Figure 4
Corner Installation
WARNING!
Do not draw outside air from garage spaces. Exhaust products of gasoline engines are hazardous.
Do not install outside air ducts such that the air may be drawn from attic spaces, basements or
above the roofing where other heating appliances or fans and chimneys exhaust or utilize air.
These 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 barriers or exposed insulation. Localized overheating could occur and a fire could re-
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