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Installation & Owner's Manual
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
NOTICE: DO NOT discard this manual!
Model(s):
VENT FREE FIREBOX
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 • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18
Installation, Care, and Operation
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.
• DO NOT store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
• DO NOT overfire. Overfiring will void your
warranty.
• Comply with all minimum clearances to com-
bustibles as specified. Failure to comply may
cause house fire.
WARNING
HOT SURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
fireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
Installation and service of this appliance should be performed by
qualified personnel. Hearth & Home Technologies recommends
HHT Factory Trained or NFI certified professionals.
For use with a listed gas-fired unvented
decorative room heater not to exceed 40,000
BTU/hr. Do not build a wood fire.
1

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Summary of Contents for Monessen Hearth LSTF36-B

  • Page 1 DO NOT INSTALL AN APPLIANCE IN THIS BTU/hr. Do not build a wood fire. FIREBOX UNLESS THIS FIREBOX MEETS THE MINIMUM DIMENSIONS REQUIRED FOR THE INSTALLATION. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 2: Table Of Contents

    8 Combustion Air Install Model AK22 Combustion Air Assembly 9 Optional Equipment Forced AIr Kit Refractory Accent Light Kit Optional Door Kit 10 Service Parts Service Parts Lists Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 3 Comments: Further description of the issues, who is responsible (Installer/Builder/Other Trades, etc.) and corrective action needed: Comments communicated to party responsible __________________________ by ______________________on _________ (Builder/Gen. Contractor) (Installer) (Date) 4613-902 • Rev A • 4/18 Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 4: Welcome

    Address: ____________________________________________________________ information here and fireplace information ____________________________________________________________ below. Phone: _____________________________________________________________ Email: _____________________________________________________________ Fireplace Information: Brand: ________________________________________________ Model Name: ___________________________ Serial Number: __________________________________________ Date Installed: __________________________ Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 5: Limited Lifetime Warranty

    Firebox and heat exchanger Lifetime All replacement parts 90 Days beyond warranty period See conditions, exclusions, and limitations on next page. 4021-645H 10/15 Page 1 of 2 Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 6 THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE WARRANTY SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE EXPRESSED WARRANTY SPECIFIED ABOVE. 4021-645H 10/15 Page 2 of 2 Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 7: Important Safety And Operating Information

    10,000 Btu/hr. irritation. This is a normal and temporary occurrence. Continued on page 8 Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 8 Fireplace Institute ® (NFI) comme cycle. Similar noises are found with your fur- étant des spécialistes du NFI en matièred’appareils de chauffage nace heat exchanger or car engine. au gaz. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 9: General Installation Information

    Pipe sealant approved for use with propane/L.P.G. (resistant to sulfur compounds) Refer to the installation instructions provided with the log sets for items required for log set installation. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 10: Firebox And Framing Dimensions

    45” 42” 18-3/4” 24” 3” 3” 36” 3” 5-1/4” Left Right Front 37-1/4” 30-3/4” 8-3/8” 3-1/4” 2-3/8” 42” 8-3/4” 1-1/4” 12” 12” Figure 4.1 Framing Dimensions Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 11 23” WARNING! The fireplace must be installed giving full consideration to the clearance and height requirements identified in this manual. 37-1/2” 42-1/2” Figure 4.3 Framing Specifications Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 12: Hearth Dimensions And Firebox Locations

    Do not install in the vicinity where gasoline or other flammable liquids may be stored. The vent free firebox must be kept clear and free from these combustible materials. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 13: Clearances

    3” Top View 5” Figure 6.1 Clearance and Height Requirements 6” Figure 6.4 Mantel Leg Clearance 36” (914 mm) Figure 6.2 Wall Clearance Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18 FP2320 wall clearance...
  • Page 14 The fireplace must be installed giving full consideration to the clearance and height requirements identified in this manual. Noncombustible Material 14” Min. Figure 6.6 Floor Clearance Above Noncombustible Flooring Material Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 15: Fireplace, Canopy And Gas Line Installation

    Loosen screws slightly, slide canopy slots against screws and tighten in place. Repeat for the other side. Figure 7.2. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 16: Gas Connections

    Check gas type: The gas supply must be the same as stated on the heater’s rating plate. If the gas supply is different, DO NOT INSTALL THE HEATER. Contact your dealer for the correct model. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 17: Combustion Air

    Figure 8.3 Installation Above Basement or Crawl Space FP2461 Ground above basement Level Figure 8.1 Basement Installation NOTE: Fireplace model in illustrations may not be FP2459 representative of your appliance. OA basement install Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 18 4. Assemble the flexible duct ID4 or UD4 (not supplied) between the collar and the hooded air inlet. Secure it into position with the supplied wire ties. Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 19: Optional Equipment

    If preferred, the fire brick can be removed and the unit operated without any refractory panels. Brackets to be removed before operation Figure 9.1 Remove Brackets Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 20: Service Parts

    Refractory, Hearth SRV4608-709 Bracket, Brick Front Qty 4 req 71D0124K Nailing Flange Qty 8 req 31190 Firebox Touch Up Paint SRV4021-110 Gloss Black Corvel Aerosol 71479 5/18 Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...
  • Page 21 C. Contact Information – NOTES – Monessen, a brand of Hearth & Home Technologies 7571 215th Street West, Lakeville, MN 50044 www.monessenhearth.com Monessen • LSTF36-B Installation and Operating Manual • 4613-900 • Rev A • 01/18...

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