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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
334051
result causing property damage, personal
VFS DBX cover
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 elec
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DFX & DBX Series Vent Free Fireplaces CONTENTS Thank you and congratulations on your purchase of a MHSC Fireplace. 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 technol
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IMPORTANT SAFETY INFORMATION DFX & DBX Series Vent Free Fireplaces INSTALLER OWNER Please retain these instructions for future reference. 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. • Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns. •
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IMPORTANT SAFETY INFORMATION DFX & DBX Series Vent Free Fireplaces 0. Input ratings are shown in BTU per hour and are for THIS APPLIANCE MAY BE INSTALLED IN AN elevations up to ,000 feet. For elevations above ,000 AFTERMARk ET, PERMANENTLY LOCATED, feet, input ratings should be reduced 4 percent for each MANUFACTURED (MOBILE) HOME, WHERE NOT 1,000 feet above sea level. Refer to the National Fuel PROHIBITED BY LOCAL CODES. Gas Code. THIS APPLIANCE IS ONLY FOR USE WITH THE 1. The appli
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PRODUCT FEATURES DFX & DBX Series Vent Free Fireplaces GAS SPECIFICATIONS Input BTU/hr Model Fuel Control Max. Min. Fireplace Screen 4DFXNMC Nat. Manual ,000 15,000 4DFXPMC LP Manual ,000 17,000 4DFXNVC Nat. Millivolt ,000 17,000 4DFXPVC LP Millivolt ,000 17,000 3DFXNVC Nat. Millivolt 6,000 0,000 3DFXPVC LP Millivolt 6,000 0,000 DBX4NTC Nat. T-Stat 10,000 -- Control DBX4PTC LP T-Stat 10,000 -- Knob NOTE: For LP models an external regulator is required
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FIREPLACE and FRAMING DIMENSIONS DFX & DBX Series Vent Free Fireplaces D Min. Rough S Opening L Depth R P H 1/2” S or 5/8” M O - Min. Rough Opening Width Min. Rough Q Opening J Height G N B C E I Figure 2 - F Fireplace and Framing Dimensions A K Ref. DFX24C/DBX24C DFX32C A 4 Z\x" (6 mm) 3" (813 mm) B Z\x" (57 mm) 8 C\v" (730 mm) C 6 Z\x" 334051 (673 mm) 30" (76 mm) VFS DBX dims D 14" (356 mm) 1 C\v" (553 mm) E 17" (43 mm) 0 Z\v" (514 mm) F 4 B\," (118 mm) 4 C\v" (11 mm)
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PREINSTALLATION INFORMATION DFX & DBX Series Vent Free Fireplaces • Handle the gas log burner assembly by Do not install the heater: the grate only. Do not pick the unit up by • Where curtains, furniture, clothing, or the burners. other flammable objects are less than • Gloves are recommended when handling 42" from the front of the heater. ceramic fiber logs to prevent skin irritation • In high traffic areas. from loose fibers. Logs are fragile — • In windy or drafty areas. handle with c
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DFX & DBX Series Vent Free Fireplaces COMBUSTION and VENTILATION AIR 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 3 whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.8 m per kw) of the aggre- gate input rating of all appliances installed
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FIREPLACE INSTALLATION DFX & DBX Series Vent Free Fireplaces 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. • Location must not be affected by drafts caused by kitchen exhaust fans, ceiling fans, return air reg
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FIREPLACE INSTALLATION 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. Sidewall Clearances — The clearance from the inside of the appliance to any combustible adjacent wall should not be less than 9" for the DBX4C/DFX4C and DF
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FIREPLACE INSTALLATION DFX & DBX Series Vent Free Fireplaces If unit is to be “built in”, fireplace framing can be built before or after the appliance is set in place. BE SURE THAT ALL PACk ING MATERIAL HAS BEEN REMOVED FROM THE UNDERSIDE OF THE UNIT PRIOR TO SETTING THE K FIREBOX IN PLACE. Construct fireplace framing following Figure 2 on Page 6 for fireplace dimensions. The framing headers may rest directly on top of the firebox. The fireplace may be installed directly on a combustible
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DFX & DBX Series Vent Free Fireplaces FIREPLACE INSTALLATION 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. Open the control access door and remove the screen. . Remove carton containing the four-log set. 3. To remove the grate and base assembly, take out two () screw
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FIREPLACE INSTALLATION DFX & DBX Series Vent Free Fireplaces 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. Gas piping system must be sized to provide minimum inlet pressure (Listed on Data Plate) at the maximum flow rate
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DFX & DBX Series Vent Free Fireplaces FIREPLACE INSTALLATION 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. DO NOT USE AN OPEN FLAME. Check the gas pressure with the appliance burning and the control set to HIGH. Open control access door at bottom front of unit to find valve and regulator referred to below. Do no
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ELECTRICAL INSTALLATION DFX & DBX Series Vent Free Fireplaces ODS Pilot On/Off Switch ODS Pilot Wall Switch Valve On/Off Switch Spade Terminal TH = 3 TP = 1 TP/TH = Figure 15 - Wiring Diagram FP11 Switch Optional Wall Switch or Remote Receiver Label all wires prior to disconnection when servicing controls. Wiring errors can cause FP2112 improper and dangerous operation. Verify wiring diagram proper operation after servicing. 12/08 CONNECTING OPTIONAL WALL SWITCH 1. Use 18 awg, two-wir
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FIREP CE SKYTECH REMO E OFF REMOTE ON LA T DFX & DBX Series Vent Free Fireplaces ELECTRICAL INSTALLATION CONNECT REMOTE RECEIVER THESE INSTRUCTIONS SUPERCEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE MILLIvOLT HAND-HELD REMOTE INSTRUCTIONS SUPPLIED Velcro• WITH THE REMOTE. Figure 16 1. Remove bottom louvre door. . Connect the remote connectors located in the unit. 3. Stick Velcro• pads with self-adhesive backing to bottom Remote of remote receiver and to floor of compartment behind Rece
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FINAL INSTALLATION DFX & DBX Series Vent Free Fireplaces Do not operate the unit without the screen frame panel and canopy installed. Canopy Fireplace Screen 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. FP513 Louvre Figure 17 - Remove Fireplace Screen Panel FP2513 Screws INSTALL CANOPY remove screen 1. Push louvers
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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. The positioning of the logs is critical to the safe and clean operation of this heater. Sooting and other problems may result if the logs are not properly
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LOG PLACEMENT DFX & DBX Series Vent Free Fireplaces Rear Log #3 DFX32C LOG PLACEMENT Figure 20 Left Middle 1. Install front right log (#1) on two pins on right side of Log #5 burner. . Install left front log (#) on two pins on left side of burner. 3. Install back log (#3) on back of burner. Right Middle 4. Install right middle log (#4) on two pins on burner. Rest Left Front Log #4 right end of right middle log on the right front log. Log # 5. Install left middle log (#5) on two
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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. Refer to Figures 23 & 24 for correct pilot flame. If the pilot flame does not touch the thermocouple, t
