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MAGNUM
UNVENTED
VENT-FREE
FIREBOXES
INSTALLATION AND
OPERATING INSTRUCTIONS
MODELS:
MCUF36D and MCUF42D SERIES
For use with a listed gas-fired
unvented decorative room heater
not to exceed 40,000 BTU/hr. Do
not build a wood fi re.
Carefully review the instructions
supplied with the decorative type
unvented room heater for the mini-
mum fi replace size requirement.
DO NOT INSTALL AN APPLIANCE
IN THIS FIREBOX UNLESS THIS
FIREBOX MEETS THE MINIMUM
DIMENSIONS REQUIRED FOR
THE INSTALLATION.
If the information in this manual is not followed
exactly, a fire or explosion may result causing
If the information in this manual is not followed exactly,
property damage, personal injury or loss of life.
a fi re or explosion may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or other fl ammable
–
– WHAT TO DO IF YOU SMELL GAS
–
–
– Installation and service must be performed by
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
WARNINGS
WARNINGS
vapors and liquids in the vicinity of this or any
Do not store or use gasoline or other fl ammable
other appliance.
vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
• Do not touch any electrical switch; do not use any
any phone in your building.
phone in your building.
• Immediately call your gas supplier from a
• Immediately call your gas supplier from a neighbor's
neighbor's phone. Follow the gas supplier's
phone. Follow the gas supplier's instructions.
instructions.
• If you cannot reach your gas supplier, call the fi re
• If you cannot reach your gas supplier, call the
department.
fi re department.
Installation and service must be performed by
a qualified installer, service agency or the gas
a qualifi ed installer, service agency or the gas
supplier.
supplier.
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Related Manuals for Monessen Hearth Magnum Unvented Vent-Free Fireboxes MCUF42D SERIES
Summary of Contents for Monessen Hearth Magnum Unvented Vent-Free Fireboxes MCUF42D SERIES
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Page 1: Operating Instructions
MAGNUM UNVENTED VENT-FREE FIREBOXES INSTALLATION AND OPERATING INSTRUCTIONS MODELS: MCUF36D and MCUF42D SERIES For use with a listed gas-fired unvented decorative room heater not to exceed 40,000 BTU/hr. Do not build a wood fi re. Carefully review the instructions supplied with the decorative type unvented room heater for the mini- mum fi... -
Page 2: Table Of Contents
CONTENTS Important Safety Information ... 3 Product Features ...5 Before You Start ...5 General Installation Information ...6 Firebox Dimensions ...6 Minimum Hearth Dimensions ...7 Location of Firebox ...7 Clearances and Height Requirements ...8 Fireplace Framing...10 Gas Line Installation ...12 Canopy Installation ...13 Optional Equipment ...14 Forced Air Kit ...14 Brass or Chrome Trim ...14... -
Page 3: Important Safety Information
INSTALLER Please leave these instructions with the appliance. Read these instructions carefully before installing or trying to operate a vent-free gas heater in this fi rebox. • Any change to this heater or its controls can be dangerous. • Improper installation or use of the heater can cause serious injury or death from fi re, burns, explosion or carbon monoxide poisoning. - Page 4 IMPORTANT SAFETY INFORMATION Continued from page 3 16. Keep room area clear and free from combustible materi- als, gasoline and other flammable vapors and liquids. 17. Unvented gas heaters are a supplemental zone heater. They are not intended to be a primary heating appli- ance.
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Page 5: Product Features
Do not attempt to burn solid wood fuels, vented gas log sets, or any other combustible in this unvented fi rebox. Also, do not install a vent-free gas log set in this fi rebox if the minimum clearance and height requirements of the log set are too large for the fi... -
Page 6: General Installation Information
GENERAL INSTALLATION INFORMATION In planning the installation for the appliance it is necessary to determine where the unit is to be installed and whether optional accessories are desired. Gas supply piping should also be planned. The following steps represent the normal sequence of installation. -
Page 7: Minimum Hearth Dimensions
GENERAL INSTALLATION INFORMATION MINIMUM HEARTH DIMENSIONS MCUF36D-F MCUF36D-R " " 15" " " " 25" 25" " " LOCATION OF FIREBOX Carefully select the best location for installation of your vent-free firebox. The following factors should be taken into consideration: •... -
Page 8: Clearances And Height Requirements
CLEARANCES HEIGHT REQUIREMENTS Ensure that minimum clearances shown in Figures 4 through 7 are maintained. Left and right clearances are determined when facing the front of the firebox. Follow these instructions carefully to ensure safe installation. Failure to follow these requirements may create a fire hazard. Sidewall clearances: The clearance from the inside of the appliance to any combustible wall should not be less than 6". -
Page 9: Height Requirements
Mantel clearances: The canopy supplied with the unit must be installed. If a combustible mantel is installed, it must meet the clearance requirements as shown in Figure 7A. However, if lower mantel height is desired, see page 15 and Figure 7B. 10"... -
Page 10: Fireplace Framing
FIREPLACE FRAMING Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figures 9 through 12 and the chart below for your specific installation requirements. See Figure 1 on Page 6 for firebox dimensions. The framing headers may rest on the top of the firebox standoffs. -
Page 11: Clearances And Height Requirements
When finishing a custom cabinet, mantel, or other built-in enclosure, the opening size to accommodate the fireplace with trim installed is as follows: MCUF36D MCUF42D with Trim with Trim 42" " The fi replace must be installed giving full consideration to the clearance and height requirements identifi... -
Page 12: Gas Line Installation
GAS LINE INSTALLATION Plumbing connections should only be performed by a qualified, licensed plumber. Main gas supply must be off when plumbing gas line to fireplace or performing service. Consult all local codes. All gas piping must be installed to comply with local codes, or in the absence of local codes, with the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA54. -
Page 13: Installing Canopy
INSTALLING CANOPY A canopy is furnished with each firebox and MUST be installed for safe operation. See Figure 15. 1. Remove the three (3) screws from the top front frame assembly. Also remove the two (2) screws on the side frames. See Figure 15. -
Page 14: Optional Equipment
OPTIONAL EQUIPMENT BRASS OR CHROME TRIM Optional brass trim kits can be used with unit when installed as a free standing fireplace with wood surround. OPTIONAL WIDE CANOPY The optional wide canopy can be installed. See installation instructions provided with kit. FORCED AIR KIT (BLOTMC) If you are installing the forced air kit, Model BLOTMC, on MCUF36D or MCUF42D models, see the installation instructions provided with the kit for electrical wiring requirements, or the blower installation section. -
Page 15: Illustrated Parts List
ITEM DESCRIPTION Canopy Screen Panel Screen Rod ACCESSORIES IN KITS Standard Brass Canopy Wide Brass Canopy Blower w/ Rheostat Brass Trim Curved Design Pewter Trim Curved Design Black Trim Curved Design Outside Air Kit* *Not illustrated, see following page. 26D4720 QTY MCUF36D MCUF42D 71D0500 71D1000... -
Page 16: Using Optional Outside Air Kit
USING OPTIONAL AK-4 OUTSIDE AIR KIT COMBUSTION AIR 1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner. Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation. 2. -
Page 17: Model Ak-4 Combustion Air Assembly
The use of outside air for combustion is optional unless required by building codes. It is only necessary to supply outside combustion air to one side of the fi replace. Use the model AK4 combustion air kit. MODEL AK-4 COMBUSTION AIR ASSEMBLY 1. - Page 18 USING OPTIONAL AK-4 OUTSIDE AIR KIT MODEL AK-4 COMBUSTION AIR ASSEMBLY 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". See Figure 24. 8. Slip the exposed end of the duct over the starting collar on the fi replace. 9.
- Page 19 NOTES 26D4720...
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Page 20: Limited Lifetime Warranty Policy
Ceramic Fiber Logs, Catalytic Filter and Aluminized Burners. BASIC WARRANTY Monessen Hearth Systems (MHS) warrants the components and materials in your gas appliance to be free from manufacturing and material defects for a period of two years from date of installation. After installation, if any of the components manufactured by MHS in the appliance are found to be defective in materials or workmanship, MHS will, at its option, replace or repair the defective components at no charge to the original owner.
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