Instruction/ maintenance manual of the product MCUF42D SERIES Monessen Hearth
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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. READ AND SA VE THESE INSTRUCTIONS W ARNINGS If the information in this manual is not followed exactly , a fi re or explosion may result causing property damage, personal injury or loss of life.
2 26D4720 CONTENTS Important Safety Information ................................. 3 Product Features ......................................................5 Before Y ou Start .....................................................5 General Installation Information .
26D4720 3 9. The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.l/NFPA54. 10. This unit complies with ANSI Z21.91.2001 ventless fire- box enclosures for gas-fired unvented decorative room heaters.
4 26D4720 IMPORT ANT SAFETY INFORMA TION 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.
26D4720 5 The MCUF36D and MCUF42D Series are vent-free fireboxes. They feature a self contained heat-circulating system. This installation manual will enable you to obtain a safe, efficient and dependable installation of your vent-free firebox. Do not alter or modify the firebox or its components under any circumstances.
6 26D4720 D F E H C 5.25" 32.125" 2.50" 2.50" B 26.25" 9.75" 8.25" 37.375" 6" A In planning the installation for the appliance it is necessary to determine where the unit is to be installed and whether optio nal accessories are desired.
26D4720 7 MINIMUM HEARTH DIMENSIONS GENERAL INST ALLA TION INFORMA TION AND LOCA TION OF FIREBOX Figure 2 - Minimum Hearth Dimensions LOCA TION OF FIREBOX Carefully select the best location for installation of your vent-free firebox. The following factors should be taken into consideration: • Clearance to side wall, ceiling, woodwork and windows.
8 26D4720 6" Minimum 42" Minimum 6" Min imum 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.
26D4720 9 12" 10" 8" 6" 2 1 / 2 " 12" 16" 19" 21" 23" CLEARANCES AND HEIGHT REQUIREMENTS 5. 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 .
10 26D4720 H G D F E A C B A 8 1 / 4 " 1 / 2 "- 5 / 8 " C A G C G A ½"- ⅝ " 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.
26D4720 11 K J FIREPLACE FRAMING MCUF36D MCUF42D with Trim with Trim K 42" 47 3 / 4 " J 38 1 / 8 " 38 1 / 8 " 1. Bend out the nailing flanges located on each side of the firebox. 2. Slide the firebox into prepared framing or position firebox in its final position and frame later.
12 26D4720 GAS LINE INST ALLA TION 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. Remove the baseplate for ease of gas line installation.
26D4720 13 CANOPY INST ALLA TION INST ALLING 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.
14 26D4720 Thermostat Control Fan Switch OFF ON Black White Green 1 10/1 15 V .A.C. Black Blower Motor OPTIONAL EQUIPMENT FORCED AIR KIT (BLOTMC) If you are installing the forced air kit, Model BLOTMC.
26D4720 15 1 4 5Ê 2 3 *Not illustrated, see following page. ILLUSTRA TED P ARTS LIST ITEM DESCRIPTION QTY MCUF36D MCUF42D 1 Canopy 1 71D0500 71D1000 2 Screen Panel 2 26D4562 26D45622 3 Screen Rod 2 2.
16 26D4720 USING OPTIONAL AK-4 OUTSIDE AIR KIT 8'max. 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.
26D4720 17 USING OPTIONAL AK-4 OUTSIDE AIR KIT 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.
18 26D4720 MODEL AK-4 COMBUSTION AIR ASSEMBL Y (CONTINUED) 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". See Figur e 24. 8. Slip the exposed end of the duct over the starting collar on the fi replace .
26D4720 19 NOTES.
JUNE 2008 P/N 26D4720 • Rev . 7 MONESSEN HEARTH SYSTEMS LIMITED LIFETIME W ARRANTY POLICY The following components are warranted for life to the original owner, subject of proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners.
An important point after buying a device Monessen Hearth MCUF42D SERIES (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Monessen Hearth MCUF42D SERIES yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Monessen Hearth MCUF42D SERIES - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Monessen Hearth MCUF42D SERIES you will learn all the available features of the product, as well as information on its operation. The information that you get Monessen Hearth MCUF42D SERIES will certainly help you make a decision on the purchase.
If you already are a holder of Monessen Hearth MCUF42D SERIES, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Monessen Hearth MCUF42D SERIES.
However, one of the most important roles played by the user manual is to help in solving problems with Monessen Hearth MCUF42D SERIES. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Monessen Hearth MCUF42D SERIES along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
