Monessen Hearth DBX24C Installation And Operating Instructions Manual
Dfx, dbx vent-free fireplace systems
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DFX, DBX Vent-Free
Fireplace Systems
Installation & Operating Instructions
Models:
DFX24C, DFX32C, DBX24C
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.
334051
VFS DBX cover
This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed.
Provisions for adequate combustion and
ventilation air must be provided. Refer to Page
8.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future refer-
ence.
33D4047 6/10 Rev. 5
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Table of Contents
Related Manuals for Monessen Hearth DBX24C
Summary of Contents for Monessen Hearth DBX24C
- Page 1 DFX, DBX Vent-Free Fireplace Systems Installation & Operating Instructions Models: DFX24C, DFX32C, DBX24C 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
DFX & DBX Series Vent Free Fireplaces Thank you and congratulations on your purchase of a PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE! 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. DFX24C and DFX32C gas log appliances described in this manual feature the TRIPLE PLAY BURNER SYSTEM technology producing a full random yellow flame, full depth ember bed and glowing logs. -
Page 3: Important Safety Information
IMPORTANT SAFETY INFORMATION INSTALLER Please leave these instructions with the appliance. • 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: Code Approval
DFX & DBX Series Vent Free Fireplaces 19. Input ratings are shown in BTU per hour and are for elevations up to ,000 feet. For elevations above ,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above sea level. Refer to the National Fuel Gas Code. -
Page 5: Product Features
PRODUCT FEATURES Fireplace Screen Control Knob Piezo Ignition On/Off Switch Figure 1 - Unvented Gas Heater (Control Access Door Shown Open) This vent-free fireplace must be mounted on the floor or FP2507 on the optional fireplace hearth. OPERATION VFS DBX controls This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency. -
Page 6: Fireplace And Framing Dimensions
DFX & DBX Series Vent Free Fireplaces Figure 2 - Fireplace and Framing Dimensions Ref. Framing Dimensions FIREPLACE and FRAMING DIMENSIONS 1/2” or 5/8” O - Min. Rough Opening Width Min. Rough Opening Height DFX24C/DBX24C DFX32C 4Z\x" (6 mm) 3" Z\x" (57 mm) 8C\v" 6Z\x" 334051 (673 mm) 30"... -
Page 7: Preinstallation Information
PREINSTALLATION INFORMATION • Handle the gas log burner assembly by the grate only. Do not pick the unit up by the burners. • Gloves are recommended when handling ceramic fiber logs to prevent skin irritation from loose fibers. Logs are fragile — handle with care. -
Page 8: Installation Information
DFX & DBX Series Vent Free Fireplaces ADEQUATE COMBUSTION AND VENTILATION AIR This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. The National Fuel Gas Code, (ANSI Z223.1/NFPA54), defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.8 m gate input rating of all appliances installed in that space, and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8 m... -
Page 9: Fireplace Location
FIREPLACE INSTALLATION FIREPLACE LOCATION Carefully select the best location for installation of your unvented fireplace. The following factors should be taken into consideration. • Clearance to side wall, ceiling, woodwork and window or other combustibles. Refer to “Clear- ances” section on Page 10. Minimum clearances to combustibles must be maintained. •... -
Page 10: Clearances
DFX & DBX Series Vent Free Fireplaces Ensure that minimum clearances shown in Figures 5 and 6 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. -
Page 11: Fireplace Installation
DFX & DBX Series Vent Free Fireplaces When finishing a custom cabinet, mantel or other built-in enclosure, the opening size to accommodate the fireplace with trim installed is as follows: FP2445 Ref. DFX24C DBX24C opening size 6C\v" 6C\v" (680 mm) (680 mm) 5"... -
Page 12: Secure Heater To Floor Or Hearth
DFX & DBX Series Vent Free Fireplaces SECURING HEATER TO FLOOR OR HEARTH NOTE: Clearance requirements as detailed in “CLEaRanCES and HEiGHt REquiREmEntS” section on Page 16 of this manual, must be met before securing the heater in place. To prevent movement, the heater must be secured to the floor or hearth. 1. -
Page 13: Connect The Gas
FIREPLACE INSTALLATION NOTICE: A qualified gas appliance installer must connect the heater to the gas supply. Consult all local codes. Use new black iron or steel pipe. Internally tinned copper or copper tubing can be used per National Fuel Code, section 2.6.3, providing gas meets hydrogen sulfide limits, and where permitted by local codes. -
Page 14: Checking Gas Pressure
DFX & DBX Series Vent Free Fireplaces When tightening the joint to the valve, hold the valve securely to prevent movement. Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after completing connection. -
Page 15: Electrical Wiring (Millivolt)
ELECTRICAL INSTALLATION Wall Switch On/Off Switch Figure 15 - Wiring Diagram Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. CONNECTING OPTIONAL WALL SWITCH 1. Use 18 awg, two-wire cable, 15 feet maximum length. . -
Page 16: Connect Remote Receiver
DFX & DBX Series Vent Free Fireplaces CONNECT REMOTE RECEIVER THESE INSTRUCTIONS SUPERCEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE M HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. Figure 16 1. Remove bottom louvre door. . Connect the remote connectors located in the unit. 3. -
Page 17: Final Installation
FINAL INSTALLATION Do not operate the unit without the screen frame panel and canopy installed. REMOVE SCREEN 1. Remove bottom louver. Figure 17 2. Removing fireplace screen frame panel by pushing screen frame panel up and out. Figure 17 NOTE: Fireplace screen must be removed to access log box and to install canopy. -
Page 18: Log Placement
DFX & DBX Series Vent Free Fireplaces Before you begin — This unit is supplied with six (6) ceramic fiber logs. Do not handle these logs with your bare hands. Always wear gloves to prevent skin irritation from ceramic fibers. After handling the logs, wash your hands gently with soap and water to remove any traces of fibers. -
Page 19: Rock Wool Placement
5. Install left middle log (#5) on two pins on burner. Rest left end of left middle log on left front log. DBX24C LOG PLACEMENT Install one-piece log on two burner pins. Figure 21 Burner... -
Page 20: Flame Appearance
DFX & DBX Series Vent Free Fireplaces Flames from the pilot, front and rear burner should be visually checked as soon as the heater is installed. In addition, periodically check the flames visually during operation. CHECk THE PILOT FLAME The pilot flame must always be present when the heater is in operation. It should just touch the top of the thermocouple tip for natural. -
Page 21: Operating Instructions
33D4047 DFX & DBX Series Vent Free Fireplaces Figure 25 - DFX24C Log Flame Appearance LG703 24VFSC log flames LG704 Figure 27 - DBX24C Log Flame Appearance LG705 24DBXC log flames LG703 2” - 4” LG705... -
Page 22: For Your Safety Read Before Lighting
DFX & DBX Series Vent Free Fireplaces FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance is equipped with a piezo ignition device which automatically lights the pilot. If piezo is not working properly, refer to match Lighting instructions, Page 33. B. -
Page 23: Manual Control Lighting Instructions
OPERATING INSTRUCTIONS MANUAL CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information. . Make sure the manual shutoff valve is fully open. 3. This heater is equipped with an ignition device (piezo) which automatically lights the pilot. 4. Refer to Page 22, Figure 23 for the location of the piezo ignitor and control knob. -
Page 24: Thermostatic Control Lighting Instructions
DFX & DBX Series Vent Free Fireplaces THERMOSTATIC CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information . . Make sure the manual shutoff valve is fully open. 3. This heater is equipped with an ignition device (piezo) which automatically lights the pilot. 4. -
Page 25: Millivolt Control Lighting Instructions
OPERATING INSTRUCTIONS MILLIVOLT CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information label. . Make sure the manual shutoff valve is fully open. 3. This gas log set is equipped with an ignition device (piezo) which automatically lights the pilot. If piezo ignitor does not light the pilot, refer to instructions for match Lighting instructions, Page 26. -
Page 26: Match Lighting Instructions
DFX & DBX Series Vent Free Fireplaces MATCH LIGHTING INSTRUCTIONS 1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.). . Follow appropriate lighting instructions found previously. Instead of pushing and releasing the piezo button, light a match and hold the flame to the end of the pilot and ignite the pilot. -
Page 27: Troubleshooting
TROUBLESHOOTING If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfire when lit. If the gas quality or pressure is low, contact your local gas supplier immediately. OBSERVED PROBLEM ODS/pilot lights, but flame goes out when control knob is released. -
Page 28: Replacement Parts
Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this appliance may result in property damage or personal injury. REPLACEMENT PARTS DFX24C DBX24C 33D4000 33D4000 33D5000 33D4501 33D4501 33D5501... - Page 29 REPLACEMENT PARTS DFX24C MILLIVOLT & MANUAL CONTROL BURNER PARTS Ref. Description Burner/Grate Assy. Injector Venturi Control Knob Millivolt Valve Manual Control Valve Pressure Valve Regulator Burner to Valve Tube Tube Fitting, 3/8 x 5/16 Regulator Valve Tube, 5/16 ODS Pilot Valve Tube, 3/16 Piezo Ignitor Peizo Wire ODS Pilot Assy.
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Page 30: Dfx3C Millivolt Burner
DFX & DBX Series Vent Free Fireplaces DFX32C MILLIVOLT BURNER PARTS Ref. Description Burner/Grate Assy. Injector Venturi ODS Pilot Assy. Millivolt Valve Pressure Valve Regulator Burner to Valve Tube Tube Fitting 3/8 x 5/16 ODS Pilot Valve Tube, 3/16 Peizo Ignitor Piezo Wire Right Front Log #1 Left Front Log #... - Page 31 REPLACEMENT PARTS DBX24C T-STAT BURNER PARTS Ref. Description Burner Injector ODS Pilot Valve Tube, 3/16 ODS Pilot Assy. T-Stat Control Valve Pressure Valve Regulator Peizo Wire Burner Valve Tube, 1/4 Piezo Ignitor Front Log #1 Tube Nut, 1/4 (not shown)
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Page 32: Optional Accessories
DFX & DBX Series Vent Free Fireplaces FORCED AIR kIT If you are installing the forced air kit (Models BLO4-T, BLO4-TB or BLOT), see the installation instructions provided with the kit for electrical wiring requirements or the blower installation sec- tion. -
Page 33: Optional Brick
Panel Screw Figure 37 - Install Side Firebrick Panel BLACk TRIM INSTALLATION DFX24C/DBX24C FP2521 1. Remove black trim from protective packaging. Remove install side brick four (4) black screws and two () 90° angle trim brackets from owner’s manual packaging. -
Page 34: Trim Installation
DFX & DBX Series Vent Free Fireplaces 3. Use one 90° angle trim bracket to join the corner of one piece of side trim to the corner of the top trim piece. Figure 38. A rubber hammer or handle of a claw hammer will help secure the corners. - Page 35 OPTIONAL ACCESSORIES Trim Flush with Front of Fireplace Figure 42 - Slide Assembled Trim Over Top of Heater Screws Figure 43 - Secure Trim to Fireplace 33D4047 DFX & DBX Series Vent Free Fireplaces Assembled Trim FP57 FP2527 install trim FP58 FP2528 secure trim...
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Page 36: Warranty
LIMITED LIFETIME WARRANTY POLICY LIFETIME WARRANTY The following components are warranted for life to the original owner, subject to proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate and Stainless Steel Burners. FIVE YEAR WARRANTY The following components are warranted for 5 years to the original owner, subject of proof of pur- chase: Ceramic Fiber Logs, Catalytic Filter and Aluminized Burners.