Monessen Hearth DFS42NVC manual

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 10. READ AND SA VE THESE INSTRUCTIONS VENT -FREE FIREPLACE SYSTEMS INST ALLA TION AND OPERA TING INSTRUCTIONS MODELS: DFS32NVC, DFS32PVC DFS36NVC, DFS36PVC DFS42NV[...]

2 71D0532 CONTENTS Important Safety Information ................................ 3 Product Features ..................................................... 5 Operation .............................................................. 5 Speci fi cations .......................................................... 7 Ignition Controls ......................[...]

71D0532 3 10. This unit complies with ANSI Z21.11.2 Unvented Heaters. 11. Do not install the heaters in a bathroom or bedroom. 12. Correct installation of the ceramic fiber logs, proper location of the heater, and annual cleaning are necessary to avoid potential problems with sooting. Sooting, resulting from improper installation or operation, can [...]

4 71D0532 IMPORT ANT SAFETY INFORMA TION THIS APPLIANCE MA Y BE INST ALLED IN AN AFTERMAR- KET , PERMANENTL Y LOCA TED, MANUF ACTURED (MOBILE) HOME, WHERE NOT PROHIB- ITED BY LOCAL CODES. THIS APPLIANCE IS ONL Y FOR USE WITH THE TYPE OF GAS INDICA TED ON THE RA TING PLA TE. THIS APPLIANCE IS NOT CONVERTIBLE FOR USE WITH OTHER GASES. Continued from [...]

71D0532 5 PRODUCT FEA TURES Figure 1 - Access to Controls This 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 recessed into) any w[...]

6 71D0532 NA TURAL GAS Milli-Volt Pressure Regulator Pressure Setting: 3.5" w.c. Pilot Regulator: 3.5" w.c. Gas Inlet Pressure: Max. 10 1/2" w. c. Min. 5" w.c. PRODUCT FEA TURES PROP ANE/LPG Note: An external regulator is required to reduce supply pressure to a maximum of 13" w .c. Milli-Volt Pressure Regulator Pressure Set[...]

71D0532 7 SPECIFICA TIONS IGNITION CONTROLS Piezo ignitor allows ignition of the pilot without the use of matches or batteries. Milli-V olt control has four (4) positions: OFF - All gas to the gas logs is shut off at the valve. IGN - Valve position to light/maintain a standing pilot. ON - Valve position to turn ON/OFF log set with remote switch/the[...]

8 71D0532 MAKE SURE YOU HA VE RECEIVED ALL P ARTS: Check your packing list to verify that all listed parts have been received. You should have the following: • Unvented gas log grate/burner assembly • Installation/operating instructions • Ceramic fiber logs • Rock wool • Plastic bag containing crushed volcanic rock • Trim kit • Canopy[...]

71D0532 9 L J K 5 7/16" G F D E C 34 1/2" H A B I 1 1/4" 21 3/4" 6" 1 5/1 6" 2 1/2" GENERAL INST ALLA TION INFORMA TION 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 plann[...]

10 71D0532 GENERAL INST ALLA TION INFORMA TION CODES Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1 or NFPA54 which can be obtained from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 or National Fire Protection Association, Inc. Batterymarch Park Quincy, M[...]

71D0532 11 W H W ARNING The following formula can be used to determine the maximum heater rating per the definition of unconfined space: (L 1 + L 2 ) Ft x (W) Ft x (H) Ft 50 Consider two connecting rooms with an open area between, with the following dimensions: L 1 = 15 1 / 2 Ft., L 2 = 12 Ft., W = 12 Ft., H = 8 Ft. (15 1 / 2 + 12) x (12) x (8) 50 [...]

12 71D0532 GENERAL INST ALLA TION INFORMA TION REMOVING SCREEN Remove fireplace screen frame panel by pushing screen frame panel up and out. See Figure 4. Figure 5 - Canopy Installation INST ALLING CANOPY 1. Remove the fireplace screen as described in the previous section. 2. Align the canopy with the holes in the top frame. See Figure 5. 3. Secure[...]

71D0532 13 LOCATION 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. Refer to “Clearances and Height Require- ments” section on page 14. Minimum clearances to combu[...]

14 71D0532 9" Minimum 9" Minimum 42" Minimum 12" 10" 8" 6" 2 1 / 2 " 12" 16" 19" 21" 23" Combustible material can contact top of fi replace. Non-combustible material only if needed to cover optional radiant top panel above canopy . CLEARANCES AND HEIGHT REQUIREMENTS Sidewall and ceil[...]

71D0532 15 H D G F A C E 1 / 2 "o r 5 / 8 " C A G C G A FIREPLACE FRAMING 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 PACKING MATERIAL HAS BEEN REMOVED FROM THE UNDERSIDE OF THE UNIT PRIOR TO SETTING THE FIREBOX IN PLACE. Construct fireplace framing follow[...]

16 71D0532 DFS32NVC DFS36NVC DFS42NVC DFS32PVC DFS36PVC DFS42PVC K 37 ⅞ " 41 ⅞ " 47 ⅞ " J 35 ⅞ " 35 ⅞ " 35 ⅞ " FIREPLACE FRAMING K J 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. L[...]

71D0532 17 Pipe Coupling T o Heater V alve Gas Supply Inlet 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 : Hold heater valve firmly with a wrench to prevent movement when connecting to inlet pipe. Manual Shutoff V alve Pipe Stainless Flexible T ube [...]

18 71D0532 CHECKING GAS PRESSURE MILLI-VOL T CONTROL (Figure 16) The valve regulator controls the burner pressure which should be checked at the pressure test point. Turn captured screw counter clockwise two or three turns and then place tubing to pressure gauge over test point (Use test point “OUT” closest to control knob). After taking pressu[...]

71D0532 19 ELECTRICAL WIRING 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 1. Use 18 awg, two-wire cable, 15 feet maximum length. 2. At one end of the cable, connect both wires to the wall switch or thermostat. At the other end, connect one wire to TP/TH[...]

20 71D0532 ELECTRICAL WIRING A. COMPLETE MILLI-VOL T SYSTEM CHECK (“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON) a. If the reading is more than 100 milli-volts and the automatic valve still does not come on, replace the control. b. If the closed circuit reading (“A” reading) is less than 100 [...]

71D0532 21 LOG PLACEMENT Figure 19 - Installing Rear Log (#1) 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[...]

22 71D0532 LOG PLACEMENT Figure 21 - Installing Left Base Log (#3) Left Base Log (#3) Pins Figure 22 - Installing Right Front Log (#4) Right Front Log (#4) Right Front Log (#4) Pins 4. Place right front log (#4) on two pins on bottom right side of grate. See Figur e 22. 3. Place left base log (#3) on two pins on left side of grate. See Figur e 21.[...]

71D0532 23 LOG PLACEMENT Figure 23 - Installing Left T op Log (#5) Left T op Log (#5) 5. Place right end of left top log (#5) on bottom center grate pin. Place left end of left top log (#5) on top of the left base log. See Figure 23. Bottom Center Pin Pin[...]

24 71D0532 7. Place right top log (#6) on two pins to the left of right base log. See Figur e 25. PLACING ROCK WOOL After installing logs, place TPB-RW (Rock Wool) in dime-size pieces evenly across the burner surface in between the logs. Do not add additional rock wool. See Figure 26 for the ap- proximate area to place rock wool. Wash hands after p[...]

71D0532 25 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 thermo- c[...]

26 71D0532 In normal operation at full rate after 15 minutes, the following fl ame appearances should be observed: Figure 29 - Correct Appearance of Rear Flames of Charred Timber Burner will have a random pattern of yellow flames as shown in Figure 29. There should be glowing embers on the front burner. Note: The front fl ames and embers will be [...]

71D0532 27 Figure 30 - Location of Piezo Ignitor , Control Knobs and Switch on Milli-V olt Unit A. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the unit by hand. B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heav[...]

28 71D0532 OPERA TING 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, refer to instructions for “Match Lighting Instructions,” page 29. 4. [...]

71D0532 29 OPERA TING INSTRUCTIONS AND CLEANING AND SERVICING CLEANING AND SERVICING Annual inspection and cleaning by your dealer or quali fi ed service technician is recommended to prevent malfunction and/or sooting. PERIODIC CLEANING - Refer to parts diagram for location of items discussed below . • Do not use cleaning fluid to clean logs or [...]

30 71D0532 CAUTION BLOWER AND OTHER OPTIONAL EQUIPMENT OPTIONAL EQUIPMENT FORCED AIR KIT If you are installing the forced air kit, Model BLOTMC, see the installation instructions 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 install[...]

71D0532 31 #1 #2 #4 #5 #3 #6 REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. ILLUSTRA TED P ARTS BREAKDOWN 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 . W ARNING CHARRED TIMBER LOGS Item Descripti[...]

32 71D0532 5 6 3 4 8 11 9 10 1 2 7 ILLUSTRA TED P ARTS BREAKDOWN Failure to position the parts in accordance with these diagrams or failure to use only parts speci fi cally approved with this heater may result in property damage or personal injury . W ARNING[...]

71D0532 33 REPLACEMENT P ARTS LIST REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. BURNER ASSEMBL Y Item Qty TPB24 Natural Propane 1 Piezo Ignitor 1 14D0503 14D0503 2 Piezo Wire 1 00K0632 00K0632 3 Burner 1 70D0010 70D0010 4 Control V alve 1 14D0467 14D0468 5 Injector 1 70D0064 57D0680 6 ODS Pilot Assembly 1 14D0473 14D0477 7 On/Of f Swi[...]

34 71D0532 ILLUSTRA TED P ARTS BREAKDOWN 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 . W ARNING 1 2 3 4 5 6 7 3 4 7 8 9 6 6 4 5[...]

71D0532 35 DFS32C DFS36C DFS42C Item Description Qty Standard Features 1 Canopy 1 71D0023 71D0500 71D1000 2 Screen Assembly 1 71D0075 71D0545 71D1026 4 Black T rim Kit 1 BLMTK32C BLMTK36C BLMTK42C Feature Options 3 Brass Louver Kit 1 L32BR L36BR L42BR 3 Pewter Louver Kit 1 L32PW L36PW L42PW 3 Black Louver 6 26D0695 26D0697 26D0699 7 Blower with Rhe[...]

36 71D0532 OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot. Appliance produces unwanted odors. Appliance shuts off during use. Gas odor even when control knob is in OFF position. When ignitor button is pressed, there is spark at ODS pilot, but no ignition. POSSIBLE CAUSE 1. Ignitor electrode positioned wrong. 2. Igni[...]

71D0532 37 OBSERVED PROBLEM ODS/pilot lights, but flame goes out when control knob is released. Burner does not light after ODS/ pilot is lit. Burner backfires during com- bustion. Slight smoke or odor during initial operation. Logs appear to smoke after ini- tial operation. Heater produces a whistling noise when burner is lit. No gas to pilot. POS[...]

38 71D0532 TRIM INSTALLATION 1. Remove top and bottom louver assemblies by disengaging hooks. Pull assemblies up and away from unit. See Figur e 33. 2. Remove canopy by removing screws and pulling canopy away from unit. See Figur e 34. 3. Set bottom trim kit piece in place on bottom of face. Bottom piece will be held in place by the side pieces. Se[...]

71D0532 39 TRIM INSTALLATION 6. Hold trim kit together by gripping the top left and right corners. T ilt trim kit away from you and into place snugly against unit. T ighten screws installed in step 4. Figure 36 Figure 37 Figure 38 7. Secure the top trim piece to unit by installing supplied screws. See Figur e 39. 8. Secure canopy back in place on u[...]

40 71D0532 8'max. FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT COMBUSTION AIR 1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner . Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation. 2. Never mount the combustion air inlet assembly in a[...]

71D0532 41 FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT 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 fi replace. Use the model AK4 combustion air kit. MODEL AK-4 COMBUSTION AIR ASSEMBL Y 1. Remove the cover plate from the 4" outlet ope[...]

42 71D0532 MODEL AK-4 COMBUSTION AIR ASSEMBL Y (CONTINUED) 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". See Figur e 49. 8. Slip the exposed end of the duct over the starting collar on the fi replace . 9. Using the sheet metal screws provided, secure the duct end to the collar attach[...]

71D0532 43 NOTES[...]

44 71D0532 MONESSEN HEARTH SYSTEMS LIMITED LIFETIME W ARRANTY POLICY The following components are warranted for life to the original owner, subject of proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners. FIVE YEAR W ARRANTY The following components are warranted for 5 years to the original owner, subje[...]