Monessen-hearth Magnum Unvented Vent-Free Fireboxes MCUF42D SERIES User Manual

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 SAVE THESE INSTRUCTIONS

10 26D4720HGDFEACBA81/4"1/2"-5/8"CAGCGA½"-⅝"FIREPLACE FRAMING Firebox framing can be built before or after the appliance is

26D4720 11KJFIREPLACE FRAMING MCUF36D MCUF42D with Trim with Trim K 42" 473/4" J 381/8" 381/8" 1. Bend out the nailing

12 26D4720GAS LINE INSTALLATION Consult all local codes. All gas piping must be installed to comply with local codes, or in the absence of local code

26D4720 13CANOPY INSTALLATION INSTALLING CANOPY A canopy is furnished with each firebox and MUST be installed for safe operation. See Figure 15. 1.

14 26D4720ThermostatControlFan Switch OFFONBlackWhiteGreen110/115V.A.C.BlackBlowerMotorOPTIONAL EQUIPMENT FORCED AIR KIT (BLOTMC)If you are installin

26D4720 15145Ê23*Not illustrated, see following page.ILLUSTRATED PARTS LIST ITEM DESCRIPTION QTY MCUF36D MCUF42D 1 Canopy 1 71D0500 71D1000 2

16 26D4720USING OPTIONAL AK-4 OUTSIDE AIR KIT8'max.COMBUSTION AIR 1. Locate combustion air assembly at an exterior location which is not likely

26D4720 17USING OPTIONAL AK-4 OUTSIDE AIR KITThe use of outside air for combustion is optional unless required by building codes. It is only necessar

18 26D4720MODEL AK-4 COMBUSTION AIR ASSEMBLY (CONTINUED) 7. If the duct is the insulated type, push the insulation back from one end of the duct app

26D4720 19NOTES

2 26D4720CONTENTSImportant Safety Information ... 3Product Features ...

JUNE 2008 P/N 26D4720 • Rev. 7MONESSEN HEARTH SYSTEMS LIMITED LIFETIME WARRANTY POLICYThe following components are warranted for life to the original

26D4720 39. The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.l/NFPA54.1

4 26D4720IMPORTANT SAFETY INFORMATIONContinued from page 316. Keep room area clear and free from combustible materi-als, gasoline and other flammabl

26D4720 5The MCUF36D and MCUF42D Series are vent-free fireboxes. They feature a self contained heat-circulating system. This installation manual will

6 26D4720DFEHC5.25"32.125"2.50"2.50"B26.25"9.75"8.25"37.375"6"AIn planning the installation for the appl

26D4720 7MINIMUM HEARTH DIMENSIONSGENERAL INSTALLATION INFORMATION AND LOCATION OF FIREBOX Figure 2 - Minimum Hearth Dimensions LOCATION OF FIREBOX

8 26D47206"Minimum42"Minimum6"MinimumEnsure that minimum clearances shown in Figures 4 through 7 are maintained. Left and right cleara

26D4720 912"10"8"6"21/2"12"16"19"21"23"CLEARANCES AND HEIGHT REQUIREMENTS5. Mantel clearances: