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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.
08/04 31072 Rev G 1
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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 ..........................................................................................................
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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
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS A. LISTINGS AND CODE APPROVALS This fireplace system has been tested and listed in Check with your local building code agency prior to installing accordance with UL 127 standards, and has been listed by this fireplace to ensure compliance with local codes, Underwriters Laboratories Inc. for installation and operation including the need for permits and follow-up inspections. If in the United States. you need assistance during installation, please contact
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 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 D
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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 de
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS MH841 Chimney Sections Catalog # A B SL306 6 in. 4-3/4 in. SL312 12 in. 10-3/4 in. MH842-Roof Thimble & Flashing 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 Catalog # A B FS338 0-deg. 14-1/2 in. FS339 15-deg. 18-3/8 in. FS340 30-deg. 23 in. SL330 - Offset/Return CB876 Chimney Bracket TR34
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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 intermit
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 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 Figure 4 Installation Along a Wall Corner Installation WARNING! Do not draw outside air from garage spaces. Exhaust products of gasoline engines are haz- ardous. Do not install out
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 2. Frame the Fireplace The MHR36 and MHC36 fireplaces will fit a framed opening of 39-5/8 in. wide x 33-5/8 in. tall. The finished cavity depth must be no less than 19-3/4 in. Figure 5 shows a typical framing (using 2 x 4 lumber) of the fireplace, assuming combustible materials are used. All required clearances to combustibles around the fireplace must be adhered to. Chimney sections at any level require a 2 in. minimum air space clearance between the
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 3. Sidewalls/Surrounds Adjacent combustible side walls must be located a minimum of 12 in. from the fireplace opening. See Figure 6. If you are using a decorative surround constructed of combustible material, it must be located within the shaded area defined in Figure 6. Short stub walls are also acceptable if they are contained within the shaded area. Figure 6 - Sidewalls and Surrounds E. CHIMNEY REQUIREMENTS When planning your fireplace location, the c
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 1. Using Offsets and Returns a. To bypass any overhead obstructions, the chimney may be offset using a 15-deg (SL315) or 30-deg (SL330) offset/return. Perform the following steps to determine the correct chimney component combination for your particular installation. b. An offset and return may be attached together or a chimney section(s) may be used between an offset and return. 1) Measure how far the chimney needs to be shifted to enable it to avoid th
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 2. Chimney Height Requirements (above roof line) a. Major building codes specify a minimum chimney height above the roof top. These specifications are summarized in what is known as the Ten Foot Rule. This rule states: “If the horizontal 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 ftabove the peak of the roof, but never less than 3 ftin overall height above the highest point wh
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS F. FIREPLACE INSTALLATION WARNING! Before starting, do the following: 1. Wear gloves and safety glasses for protection. 2. Keep hand tools in good condition. Sharpen cutting edges and make sure tool handles are secure. 3. Always maintain the minimum air space required to the enclosure to prevent fire. 1. Position the Fireplace This fireplace may be placed on either a combustible or noncombustible continuous flat surface. Follow the instructions for frami
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 4. Assemble Chimney Sections Attach either a straight chimney section or an offset to the top of the fireplace (depending on your installation requirement). Chimney sections are locked together by pushing downward until the top section meets the stop 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 10. WARNING! Ca
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 6. Attic Insulation Shield 8. Secure the Chimney System An insulation shield should be installed when there is When offsets and returns are joined to straight pipe a possibility of insulation coming into contact with the sections, they must be locked into position with the factory built chimney system. The insulation shield is screws provided (outer only), using the predrilled holes. installed by positioning it over the vertical chimney To prevent gravit
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 9. MH842 Ceiling/Roof Thimble See Figures 14 and 15. a. Locate the point where the chimney will exit the roof by plumbing down to the center of the chimney. Lay out, cut and frame a 14-1/2 in. square opening (measured on the horizontal) through the ceiling and roof structure. See Chapter 25 of the Uniform Building Code for roof framing details. b. The thimble must extend completely through the roof structure shielding combustible materials. Five location
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS WARNING! WARNING! Do not pack insulation in spaces between the two shields This fireplace has not been tested for use with or above the shield inside the flashing. This may affect a chase above the roof. To reduce the risk of temperatures to adjacent combustibles. See page 13 fire, do not install a chase above the roof. for minimum chimney height above roof. WARNING! Detailed instructions for installation of the storm collar and termination cap are packa
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 12. Complete the Enclosure Complete the fireplace enclosure, allowing space for outside air ducts and gas piping if desired. Electrical wiring should not come in contact with the fireplace. A minimum clearance of 1 in. must be maintained between the fireplace sides and the enclosure (except at the nailing flange) as well as the fireplace back and the enclosure. See pages 9-11 for framing details. Note: Use only a noncombustible material to fin- ish the f
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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS 14. Hearth Extension A hearth extension 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 shown in Figures 19 and 20. A hearth extension of this construction may be covered with any noncombustible decorative material and may have a maximum thickness as per the illustration. Seal gaps between the hearth ex
