Monessen Hearth GCUF Series Installation And Operating Instructions Manual
Unvented fireboxes
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Unvented Fireboxes
Installation and Operating Instructions
Models: GCUF, GRUF
WARNINGS
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or other
flammable 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 touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
– Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Carefully review the instructions supplied
with the decorative type unvented room
heater for the minimum fireplace size
requirement.
DO NOT INSTALL AN APPLIANCE IN THIS
FIREBOX UNLESS THIS FIREBOX MEETS
THE MINIMUM DIMENSIONS REQUIRED
FOR THE INSTALLATION.
Monessen • GCUF/GRUF Owner Manual • 71D0530 • Rev F • 05/19
710530
GCUF cover
For use with a listed gas-fired unvented
decorative room heater not to exceed
40,000 BTU/hr. Do Not Build a Wood Fire.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
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Summary of Contents for Monessen Hearth GCUF Series
- Page 1 Unvented Fireboxes Installation and Operating Instructions Models: GCUF, GRUF WARNINGS If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. – Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
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Page 2: Table Of Contents
CONTENTS GCUF/GRUF Vent-Free Fireboxes PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE. Thank you and congratulations on your purchase of a Monessen vent free firebox. IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. -
Page 3: Important Safety Information
IMPORTANT SAFETY INFORMATION GCUF/GRUF Vent-Free Fireboxes OWNER INSTALLER Please retain these instructions for future reference. Please leave these instructions with the appliance. WARNING! • 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 fire, burns, explosion or carbon monoxide poisoning. - Page 4 IMPORTANT SAFETY INFORMATION GCUF/GRUF Vent-Free Fireboxes Continued from page 3 The initial break-in operation should last two to three WARNING! hours with the burner at the highest setting. Provide maximum ventilation by opening windows or doors to Do not attempt to burn solid wood fuels, vented allow odors to dissipate.
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Page 5: General Installation Information
GENERAL INSTALLATION INFORMATION GCUF/GRUF Vent-Free Fireboxes WHAT YOU WILL NEED FOR INSTALLATION The new GCUF and GRUF Series are vent-free fireboxes. They feature a self contained heat-circulating system. TOOLS and BUILDING SUPPLIES This installation manual will enable you to obtain a safe, • • Phillips screwdriver Square efficient and dependable installation of your vent-free •... -
Page 6: Firebox And Framing Dimensions
FIREBOX DIMENSIONS GCUF/GRUF Vent-Free Fireboxes Rough Opening Depth 1/2” - 5/8” M - Rough Opening Width Rough 1¹⁄₄” Opening Height 5⁷⁄₁₆” 34³⁄₄” 21³⁄₄” 6” Figure 1 - 2¹⁄₂” Firebox and Framing Dimensions 2¹⁄₂” 1⁵⁄₁₆” Ref. GCUF32C/GRUF32C GCUF36C/GRUF36C GCUF42C/GRF42C 37" 41" 47"... -
Page 7: Hearth Dimensions
HEARTH DIMENSIONS and FIREBOX LOCATION GCUF/GRUF Vent-Free Fireboxes LOCATION 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. See “Clearances/Height Requirements on page 8. Minimum clearances to combustibles must be main- tained. -
Page 8: Minimum Clearances
MINIMUM CLEARANCES GCUF/GRUF Vent-Free Fireboxes Ensure that minimum clearances shown in Figures 4 through 8 are maintained. Left and right clearances are 12” determined when facing the front of the firebox. Follow these instructions carefully to ensure safe instal- 10” lation. Failure to follow these requirements may create a fire hazard. -
Page 9: Firebox Framing
MINIMUM CLEARANCES and FRAMING GCUF/GRUF Vent-Free Fireboxes 5. Floor clearance: This inner chamber firebox floor must FIREBOX FRAMING be installed at least 5" above any combustible flooring Firebox framing can be built before or after the appliance material, such as carpeting or asphalt tile, which is is set in place. Construct firebox framing following Figure closer than 14" to the base of the firebox. Figure 7 1 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. -
Page 10: Fireplace Installation
FIREPLACE and CANOPY INSTALLATION GCUF/GRUF Vent-Free Fireboxes When finishing a custom cabinet, mantel, or other built-in 1. Bend out the nailing flanges located on each side of the enclosure, the opening size to accommodate the fireplace firebox. with trim installed is as follows: 2. Slide the firebox into prepared framing or position firebox in its final position and frame later. 3. Level the firebox by checking the top edge of the firebox. Shim if necessary. 4. Anchor firebox to the side framing members using 8d nails or other suitable fasteners. Figure 9. 5. The canopy must be installed for safe operation of the heater. -
Page 11: Gas Line Installation
GAS LINE INSTALLATION GCUF/GRUF Vent-Free Fireboxes WARNING! WARNING! Plumbing connections should only be performed Connecting directly to an unregulated propane by a qualified, licensed plumber. Main gas / L.P.G. tank can cause an explosion. supply must be off when plumbing gas line to fireplace or performing service. -
Page 12: Combustion Air
COMBUSTION AIR GCUF/GRUF Vent-Free Fireboxes COMBUSTION AIR 1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any man- ner. Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation. 2. -
Page 13: Optional Ak4 Outside Air Kit
COMBUSTION AIR GCUF/GRUF Vent-Free Fireboxes WARNING! Screws DO NOT remove the cover if the outside air Air Starting will not be connected. Collar Duct 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 fireplace. Use the model AK4 combustion air kit. -
Page 14: Model 403 Duct Connector
COMBUSTION AIR GCUF/GRUF Vent-Free Fireboxes 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". Figure 19 Insulation 8. Slip the exposed end of the duct over the starting collar Approximately on the fireplace. -
Page 15: Optional Equipment
OPTIONAL EQUIPMENT GCUF/GRUF Vent-Free Fireboxes FORCED AIR KIT (BLOTMC) If you are installing the forced air kit on GCUF or GRUF models, see the installation instruc- tions provided with the kit for electrical wiring requirements, or the blower installation section. The firebox must be connected to main power supply at time of firebox installation. The blower must be installed prior to the installation of the vent-free heater. -
Page 16: Service Parts
SERVICE PARTS GCUF/GRUF Vent-Free Fireboxes GCUF32C-F / -R, GRUF32C-F / -R Service Parts Beginning Manufacturing Date: N/A Ending Manufacturing Date: Active IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or distributor. Stocked Hearth and Home Technologies does not sell directly to consumers. Provide model number and serial number when requesting service parts from your dealer or distributor. - Page 17 GCUF/GRUF Vent-Free Fireboxes SERVICE PARTS GCUF36C-F / -R, GRUF36C-F / -R Service Parts Beginning Manufacturing Date: N/A Ending Manufacturing Date: Active IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or distributor. Stocked Hearth and Home Technologies does not sell directly to consumers. Provide model number and serial number when requesting service parts from your dealer or distributor.
- Page 18 SERVICE PARTS GCUF/GRUF Vent-Free Fireboxes GCUF42C-F / -R, GRUF42C-F / -R Service Parts Beginning Manufacturing Date: N/A Ending Manufacturing Date: Active IMPORTANT: THIS IS DATED INFORMATION. Parts must be ordered from a dealer or distributor. Stocked Hearth and Home Technologies does not sell directly to consumers. Provide model number and serial number when requesting service parts from your dealer or distributor.
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Page 19: Warranty
GCUF/GRUF Vent-Free Fireboxes ► Hearth & Home Technologies LIMITED LIFETIME WARRANTY Hearth & Home Technologies, on behalf of its hearth brands (“HHT”), extends the following warranty for HHT gas, wood, pellet and electric hearth appliances that are purchased from an HHT authorized dealer. WARRANTY COVERAGE: HHT warrants to the original owner of the HHT appliance at the site of installa on, and to any transferee taking ownership of the appliance at the site of installa on within two years following the date of original purchase, that the HHT appliance will be free from... - Page 20 GCUF/GRUF Vent-Free Fireboxes WARRANTY CONDITIONS: • This warranty only covers HHT appliances that are purchased through an HHT authorized dealer or distributor. A list of HHT authorized dealers is available on the HHT branded websites. • This warranty is only valid while the HHT appliance remains at the site of original installa� on. •...
- Page 21 GCUF/GRUF Vent-Free Fireboxes This page intentionally left blank. Monessen • GCUF/GRUF Owner Manual • 71D0530 • Rev G • 01/20...
- Page 22 GCUF/GRUF Vent-Free Fireboxes Monessen, a brand of Hearth & Home Technologies 7571 215th Street West, Lakeville, MN 50044 www.monessenhearth.com Monessen • GCUF/GRUF Owner Manual • 71D0530 • Rev G • 01/20...
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