Monessen Hearth DBX24C* manual

VENT -FREE FIREPLACE SYSTEMS INST ALLA TION AND OPERA TING INSTRUCTIONS READ AND SA VE THESE INSTRUCTIONS MODELS DFX24C DBX24C* DFX32C Natural Gas or Propane/LPG Manual or Milli-V olt *Thermostat Control Only This is an unvented gas- fi red heater . It uses air (oxygen) from the room in which it is installed. Provisions for adequate combustion and[...]

2 33D4047 CONTENTS Important Safety Information ..................................... 3 Product Features ....................................................... 5 Product Features and Speci fi cations ......................... 6 Getting Started .......................................................... 7 General Installation Information ..........[...]

33D4047 3 9. This unit complies with ANSI Z21.11.2 unvented heaters standard. 10. Do not install the DFX Model in a bathroom or bedroom. The DBX Model may be installed in a bedroom, but not in a bathroom. 11. Correct installation of the ceramic fiber logs, proper loca- tion of the heater, and annual cleaning are necessary to avoid potential problem[...]

4 33D4047 IMPORT ANT SAFETY INFORMA TION This appliance may be installed in an aftermarket, permanently located, manufactured (mobile) home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. 15. Keep room area clear and [...]

33D4047 5 Piezo Ignition Fireplace Screen Control Knob PRODUCT FEA TURES Your vent-free fireplace must be mounted on the floor or on the optional fireplace hearth. OPERA TION This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency. This zero-clearance unvented gas heater can be installed against (or reces[...]

6 33D4047 NA TURAL GAS Manual and T -Stat Pressure Regulator Pressure Setting 4 in. w .c. Gas Inlet Pressure: Max. 10.5 in. w .c. Min. 5 in. w .c. PRODUCT FEA TURES and SPECIFICA TIONS IGNITION CONTROLS Piezo ignitor allows ignition of the pilot without the use of matches or batteries. Manual control has four (4) positions: OFF - All gas to the gas[...]

33D4047 7 PILOT The gas log heater is fitted with a specially designed safety pilot light which senses the amount of oxygen available in the room and shuts the gas log heater off if the oxygen level begins to drop below a satisfactory level. The pilot can only be reli t when adequate fresh air is available. THERMAL GENERA TOR The milli-volt gas log[...]

8 33D4047 J K I E C D A B H L G N M F In planning the installation for the fireplace it is necessary to determine where the unit is to be installed and whether optio nal accessories are desired. Gas supply piping should also be planned. The following steps represent the normal sequence of installation. Each installation is unique, however, and migh[...]

33D4047 9 GENERAL INST ALLA TION INFORMA TION ADEQUA TE COMBUSTION AND VENTILA TION 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 defines a confined space as a space whose volume is less than 50 cubic f[...]

10 33D4047 GENERAL INST ALLA TION INFORMA TION Figure 3 - Sample Room for Determining the Maximum Heater Rating W ARNING If the area in which the heater may be operated is smaller than that de fi ned as an uncon fi ned space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the method[...]

33D4047 11 GENERAL INST ALLA TION INFORMA TION INST ALLING OPTIONAL FIREBRICK P ANELS 1. Remove optional firebrick panels from packaging. Check to See that you have the following: • 3 firebrick panels • two (2) retainer brackets • two (2) black screws If any part or parts are missing, contact dealer where you bought fireplace. 2. Turn off fir[...]

12 33D4047 GENERAL INST ALLA TION INFORMA TION BLACK TRIM INST ALLA TION (DFX24C/DBX24C) 1. Remove black trim from protective packaging. Remove four (4) black screws and 2 (two) 90°-angle trim brackets from owner ’s manual packaging. 2. Lay trim on fl oor and match corners of side trims to top trim (See Figure 6). 3. Use one 90°-angle trim bra[...]

33D4047 13 GENERAL INST ALLA TION INFORMA TION 45°-angled Corners Back of T rim Assembly T op T rim Piece Side T rim Pieces 90°-angled Shim 90°-angled Bracket Outside Corner Slot Outside Corner Slot Bracket Screws BLACK TRIM INST ALLA TION (DFX32C) 1. Remove trim from protective packaging. Be careful not to scratch the trim. Remove two (2) 90°-[...]

14 33D4047 REMOVING SCREEN 1. Remove bottom louver. See Figure 14. 2. Removing fireplace screen frame panel by pushing screen frame panel up and out. See Figure 14. GENERAL INST ALLA TION INFORMA TION Figure 15 - Canopy Installation INST ALLING CANOPY 1. Push louvers up and out to remove top louver assembly. 2. Align the black canopy with the holes[...]

33D4047 15 GENERAL INST ALLA TION INFORMA TION SECURING HEA TER TO FLOOR OR HEARTH Note: Clearance requirements as detailed in “CLEARANCES and HEIGHT REQUIREMENTS” section on page 17 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[...]

16 33D4047 LOCA TION OF FIREPLACE 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. See Clearances and Height Requirements section on page 17. Minimum clearances to combustibles must[...]

33D4047 17 9" Minimum 42" Minimum 9" Minimum 12" 2 1/2" 10" 19" CLEARANCES and HEIGHT REQUIREMENTS Figure 20 - Minimum Mantel Clearances Canopy Ensure that minimum clearances shown in Figures 14 and 15 are maintained. Left and right clearances are determined when facing the front of the firebox. Follow these instr[...]

18 33D4047 H G D F E A C C G A 1 / " 5 / " B A 1 / 2 " or 5 / 8 " C A G DFX24C DBX24C DFX32C A 24 3 / 4 24 3 / 4 32 1 / 2 B 26 3 / 4 26 3 / 4 30 1 / 4 C 14 14 21 3 / 4 D 10 1 / 2 10 1 / 2 14 1 / 2 E 42 1 / 2 42 1 / 2 53 3 / 4 F 21 21 26 3 / 4 G 10 1 / 2 10 1 / 2 12 1 / 4 H 30 30 38 FIREPLACE FRAMING If unit is to be “built in?[...]

33D4047 19 H J Nail Sides Through Nailing Flanges 1. Bend out the nailing flanges located on each side of the firebox. 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 us[...]

20 33D4047 Pipe Coupling T o Heater V alve 3" Minimum CAUTION CONNECTING THE GAS NOTICE: A quali fi ed gas appliance installer must connect the heater to the gas supply . Consult all local codes. IMPORT ANT : Loosen the pipe adapter on the flex tube before installing to the system piping. CHECK GAS TYPE: The gas supply must be the same as sta[...]

33D4047 21 W ARNING T est Port “A” CHECKING GAS PRESSURE 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 fr[...]

22 33D4047 ELECTRICAL WIRING (MILLI-VOL T) The milli-volt valve is a self-powered combination gas control THA T DOES NOT REQUIRE 1 10 V AC TO OPERA TE. CONNECTING OPTIONAL W ALL SWITCH OR THERMOST A T 1. Use 18 awg, two-wire cable, 20 feet maximum length. 2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other [...]

33D4047 23 SK YTECH O F FO N R E M O T E FIRE PLA CE REMOTE Remote Receiver V elcro Pad V elcro ® Pad ELECTRICAL WIRING (MILLI-VOL T) CONNECTING REMOTE RECEIVER THESE INSTRUCTIONS SUPERSEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE MILLI-VOL T HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. 1. Remove bottom louver door. 2. Connect the[...]

24 33D4047 LOG PLACEMENT Before you begin — This unit is supplied with a set of three ceramic fiber logs. Do not handle these logs with your bare hands. Always wear gloves to prevent skin irritation from ceramic fibers. After handling logs, wash your hands gently with soap and water to remove any traces of fibers. PROPER INST ALLA TION SEQUENCE ([...]

33D4047 25 LOG PLACEMENT PROPER INST ALLA TION SEQUENCE (DBX24C) Install one-piece log on two burner pins. See Figure 35. Figure 35 - Proper Sequence of Log Installation (DBX24C) Burner Pin Burner Pin One-piece Log Figure 34 - Proper Sequence of Log Installation (DFX32C) PROPER INST ALLA TION SEQUENCE (DFX32C) See Figure 34. 1. Install front right [...]

26 33D4047 FLAME APPEARANCE 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. CHECKING THE PILOT FLAME The pilot fl ame must always be present when the heater is in operation. It should just touch the top of the ther- moc[...]

33D4047 27 INST ALLING ROCK WOOL AND CHECKING BURNER FLAME PLACING ROCK WOOL DFX24C AND DFX32C MODELS After installing logs, pull apart dime-size pieces of rock wool. Sprinkle rock wool evenly over burner ports. Wash hands after installing rock wool. Itching may occur. W ARNING • Use only rock wool provided with log set. • Do not add additional[...]

28 33D4047 OPERA TING INSTRUCTIONS A void any drafts that alter burner fl ame patterns. Do not allow fans to blow directly into the fireplace. Do not place a blower inside the burn area of the firebox. Ceiling fans may create drafts that alter flame patterns. Sooting and improper burning will result. During manufacturing, fabricating and shipping,[...]

33D4047 29 Figure 44 - Location of Piezo Ignitor & Control Knob Piezo Ignitor 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 see Match Lighting Instructions, page 33. B. BEFORE OPERATING smell all around the appliance area for[...]

30 33D4047 OPERA TING INSTRUCTIONS MANUAL CONTROL LIGHTING INSTRUCTIONS W ARNING W ait 30 seconds before readjusting the heater when the control knob has been turned down to a lower setting. Push Push Rotate Rotate Push Rotate Figure 45 - IGN Position Figure 46 - HIGH Position Figure 47 - LOW Position TO TURN OFF GAS T O HEA TER 1. Turn control kno[...]

33D4047 31 THERMOST A TIC CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information . 2. 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. See Figure 44, page 29 for the location of the piezo ignitor and control knob. Turn control knob clock[...]

32 33D4047 OPERA TING INSTRUCTIONS MILLI-VOL T CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information label. 2. 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, See instructions for Match Ligh[...]

33D4047 33 OPERA TING INSTRUCTIONS MA TCH LIGHTING INSTRUCTIONS 1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.). 2. 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.[...]

34 33D4047 CAUTION BLOWER AND OTHER OPTIONAL EQUIPMENT OPTIONAL EQUIPMENT FORCED AIR KIT If you are installing the forced air kit (Models BLO24-T, BLO24-TB or BLOT), see the installation instructions provided with the kit for electrical wiring requirements or the blower installation section. Model DFX24C uses blower model BLO24T. Model DFX32C uses [...]

33D4047 35 1 4 3 2 5 6 ILLUSTRA TED P ARTS BREAKDOWN FOR CABINET ACCESSORIES ST ANDARD FEA TURES ITEM DESCRIPTION QTY DFX24C DBX24C DFX32C 1 Canopy 1 33D4000 33D4000 33D5000 2 Screen Assembly 1 33D4501 33D4501 33D5501 3 Left Firebrick (Optional) 1 26D7061 26D7061 26D7065 4 Center Firebrick (Optional) 1 26D7060 26D7060 26D7064 5 Right Firebrick (Opt[...]

36 33D4047 1 3 2 14 15 10 10 10 9 7 8 16 13 11 13 12 5 5 4 6 ILLUSTRA TED P ARTS BREAKDOWN DFX24C MILLI-VOL T DFX24C MANUAL W ARNING Failure to position the parts in accordance with these diagrams or failure to use only parts speci fi cally approved with this appliance may result in property damage or personal injury .[...]

33D4047 37 REPLACEMENT P ARTS LIST REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. ITEM DESCRIPTION QTY DFX24C MILLIVOL T DFX24C MANUAL NA TURAL PROP ANE NA TURAL PROP ANE 1 Burner/Grate Assembly 1 33D4043 33D4043 33D4043 33D4043 2 Injector 1 59D0062 33D4046 59D0062 33D4046 3 V enturi 1 58D0454 33D4058 58D0454 33D4058 4 Control Knob 1 ?[...]

38 33D4047 1 3 2 10 10 10 9 7 8 13 11 13 12 5 5 4 6 14 15 16 17 18 ILLUSTRA TED P ARTS BREAKDOWN DFX32C MILLI-VOL T DFX32C MANUAL W ARNING Failure to position the parts in accordance with these diagrams or failure to use only parts speci fi cally approved with this appliance may result in property damage or personal injury .[...]

33D4047 39 REPLACEMENT P ARTS LIST REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. ITEM DESCRIPTION QTY DFX32C MILLIVOL T DFX32C MANUAL NA TURAL PROP ANE NA TURAL PROP ANE 1 Burner/Grate Assembly 1 33D5050 33D5050 33D5050 33D5050 2 Injector 1 33D5040 33D5039 33D5040 33D5039 3 V enturi 1 58D0454 33D4058 58D0454 33D4058 4 Control Knob 1 ?[...]

40 33D4047 1 2 10 8 3 4 9 7 5 6 ILLUSTRA TED P ARTS BREAKDOWN DBX24C T -ST A T W ARNING Failure to position the parts in accordance with these diagrams or failure to use only parts speci fi cally approved with this appliance may result in property damage or personal injury .[...]

33D4047 41 REPLACEMENT P ARTS LIST REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. DBX24C T -ST A T ITEM DESCRIPTION QTY NA TURAL PROP ANE 1 Burner 1 33D0070 33D0071 2 Injector 1 18D0523 33D0281 3 ODS Pilot V alve T ube, 3/16 1 49D0050 49D0050 4 ODS Pilot Assembly 1 26D2529 14D0476 5 T -stat Control V alve 1 1 1V0701 1 1V0701 6 Pressure [...]

42 33D4047 Note: All troubleshooting items are listed in order of operation. TROUBLESHOOTING W ARNING T urn appliance OFF and allow to cool before servicing. Only a qualified service person should service and repair the heater . OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no spark at ODS/pilot. 1. Ignitor electro[...]

33D4047 43 TROUBLESHOOTING If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may back fi re when lit. If the gas quality or pressure is low , contact your local gas supplier immediately . W ARNING OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS/pilot lights, but fl ame goes out when control knob is rel[...]

June 2006 P/N 33D4047 • Rev . 2 MONESSEN HEARTH SYSTEMS LIMITED LIFETIME W ARRANTY POLICY LIFETIME W ARRANTY 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 W ARRANTY The following components are warran[...]