Monessen Hearth NB24 manual

READ AND SA VE THESE INSTRUCTIONS UNVENTED GAS LOG HEA TER or VENTED DECORA TIVE APPLIANCE INST ALLA TION AND OPERA TING INSTRUCTIONS 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 ventilation air must be provided. Refer to page 7. W ARNINGS If the inform[...]

2 81D0107 CONTENTS Important Safety Information .................................. 3 Getting Started .......................................................... 5 Product Features and Speci fi cations .................... 6 Natural Gas ......................................................... 6 Propane/LPG ..........................................[...]

81D0107 3 IMPORT ANT SAFETY INFORMA TION 10. This unit complies with the latest revision of ANSI Z21.11.2-2007 Unvented Heaters and also complies with ANSI Z21.60 Decorative Vented Appliances for Solid Fuel Burning Fireplaces. State and local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes[...]

4 81D0107 IMPORT ANT SAFETY INFORMA TION Continued from page 3 16. Keep room area clear and free from combustible materi- als, gasoline and other flammable vapors and liquids. 17. Unvented gas heaters are a supplemental zone heater. They are not intended to be the primary heating appli- ance. 18. Unvented gas heaters emit moisture into the living a[...]

81D0107 5 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 Burner Assembly • Two (2) Plastic Bags Containing Crushed Volcanic Rock • Installation/Operating Instructions • Two (2) Anchoring Screws • Ceramic Fiber Logs / Ref[...]

6 81D0107 PRODUCT FEA TURES AND SPECIFICA TIONS NA TURAL GAS NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 1 / 2 " W .C. on natural gas systems operating at higher pressure. MILLIVOL T Regulator Pressure Setting: 3.5" w.c. Pilot Regulator: 3.5" w.c. Gas Inlet Pressure: Max 10 1 / 2 " w.c. M[...]

81D0107 7 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, [...]

8 81D0107 W H The following formula can be used to determine the maximum heater rating per the definition of unconfined space: BTU / Hr = (L1 + L2) Ft x (W) Ft x (H) Ft. x 1000 BTU / Hr 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. BTU / Hr = (15 1 [...]

81D0107 9 A C D B FIREPLACE AND HEARTH DIMENSIONS Use manufacturer's installation and clearance requirements as de fi ned in their manual. The NB Series unvented room heater is approved for installation into the following unvented fireplaces: GCUF Series Fireboxes Magnum36/42, Lo-Rider36 or BUF The NB Series unvented room heater may also be i[...]

10 81D0107 PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER IMPORT ANT INFORMA TION FOR THE INST ALLA TION OF THIS GAS LOG SET The following are guidelines for placing a gas log set in a fireplace that has a restrictive barrier along the bottom front open- ing of the fireplace. Some examples of barriers are glass/screen door frames and sunken/re[...]

81D0107 11 16" 42" CLEARANCES AND HEIGHT REQUIREMENTS Sidewall and ceiling clearances: The sides of the fireplace opening must be at least 16" from any combustible wall. The ceiling must be at least 42" from the top of the fireplace opening. Figure 4 - Sidewall and Ceiling Clearances The dimensions shown in Figures 4 through 12 [...]

12 81D0107 Measur e this distance Heater in Fireplace or Firebox Heat Resistant Material Figure 5 - Measuring Heat Resistant Material Heat resistant material (minimum requirements) with no wooden mantel or other combustible projection: To install the gas logs into a fireplace with no wooden mantel, shelf or other combustible projection above the fi[...]

81D0107 13 Heater in Fireplace or Firebox 8" or More of Heat Resista n Material Hood CLEARANCES and HEIGHT REQUIREMENTS Figure 6 - Measuring Heat Resistant Material for Mantel Heat resistant material (minimum requirements) with wooden mantel or other combustible projection: To install the heater with a wooden mantel, shelf or other combustible[...]

14 81D0107 Heater in Fireplace or Firebox Heat Resistant Material Hood 10" 12" 8" 6" 2 1 / 2 " 8" 14 1 / 2 "1 8 5 / 8 "2 2 1 / 2 " 26" CLEARANCES AND HEIGHT REQUIREMENTS Figure 8 - Minimum Mantel Clearance with Hood - All Models Example: A mantel may project from the wall a maximum of 2 1 / 2 "[...]

81D0107 15 Heater in Fireplace or Firebox Heat Resistant Material 10" or less 12" min. 28" 2 1 / 2 " 8" 6" 7" 14 1 / 2 " 4" Figure 10 - Minimum Mantel Clearance with Hood - NB24 (Example of Unsafe Installation) Figure 9 - Minimum Mantel Clearance with No Hood — NB24 Example: The bottom of the mantel ma[...]

16 81D0107 Heater in Fireplace or Firebox 1 3 / 8 " Minimum Combustible Material 14" Minimum Heater in Fireplace or Firebox Combustible Material This Distance May Now Be Less than 1 3 / 8 " FLOOR CLEARANCE The gas log heater must be installed at least 1 3 / 8 " above any combustible flooring material, such as carpeting or tile, [...]

81D0107 17 Damper Stop Damper Figure 13 - Damper Stop Installation. FIREPLACE PREP ARA TION BEFORE FULL Y INST ALLING THE UNIT : • Turn OFF the gas supply to the fireplace or firebox. • Seal any fresh air vents and/or ash clean-out doors located on the floor or wall of the fireplace. If left unsealed, draftin g may cause pilot outage or sooting[...]

18 81D0107 INST ALLING VENTED APPLICA TIONS PLACING AND SECURING APPLIANCE ASSEMBL Y PROCEDURE: 1. Center the gas log unit on the fireplace or firebox. Make certain the front of the burner sits inside the front edge of the fireplace or firebox. 2. Anchor holes are located on the right and left sides of the unit. After centering the burner correctly[...]

81D0107 19 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 [...]

20 81D0107 CHECKING GAS PRESSURE The heater gas inlet connection is a 3 / 8 " NPT at the valve. On all control type units, the inlet connection is on the right side of unit. To connect from the opposite side, route the pipe around the back portion of the unit. When tightening up the joint to the valve, hold the valve securely to prevent moveme[...]

81D0107 21 ELECTRICAL WIRING (MILLIVOL T) The Millivolt valve is a self-powered combination gas control THA T DOES NOT REQUIRE 1 10 V AC T O OPER- A TE. CONNECTING OPTIONAL W ALL SWITCH OR THERMOST A T 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[...]

22 81D0107 ELECTRICAL WIRING (MILLIVOL T) CONNECTING REMOTE RECEIVER 1. Set remote receiver. See instructions included in receiver kit. 2. Connect the two (2) 1/4" female connectors to the TP/TH and TH terminals on the control valve. Figure 18 - Installing Remote Receiver Remote Receiver Remote Wire Connectors A. COMPLETE MILLIVOL T SYSTEM CHE[...]

81D0107 23 Dime-Size Rock Wool Figure 19 - Placing Rock Wool #1 #2 LOG PLACEMENT Before you begin — This unit is supplied with seven (7) 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[...]

24 81D0107 #3 #4 #5 #6 #7 #8 LOG PLACEMENT 4. Place left rear log (#4) on pin located on rear support bracket on left side. See Figur e 23. 5. Place left front log (#5) on left pin located on burner and left grate bar. Rest top right portion of log on right front lo g. See Figur e 24 6. Place log #6 on unit by placing grooved portion of log onto le[...]

81D0107 25 Cast Iron Grate B . A. Cast Iron Grate I Slot Key Hole Slot EMBER, GRA TE, AND ROCK INST ALLA TION PLACING FLICKERING EMBERS Place flickering bright embers (FBE-.1G) after placing logs on burner. Pull apart into small strands and place on top of existing rock wool in front of and between front logs where they can be seen. Try to avoid st[...]

26 81D0107 FLAME APPEARANCE Figure 30 - Correct Appearance of Pilot Flame Figure 31 - Incorrect Appearance of Pilot Flame Thermocouple for Natural Thermocouple for LP Thermocouple for LP Thermocouple for Natural Flames from the pilot and burner should be visually checked as soon as the heater is installed. In addition, periodically check the flames[...]

81D0107 27 In normal operation at full rate after 15 minutes, the following fl ame appearances should be observed: Figure 32 - Correct Appearance of Rear Flames of Berkley Oak Burner will have a random pattern of yellow flames as shown in Figure 32. There should be glowing embers on the front burner. Note: The front fl ames and embers will be an [...]

28 81D0107 Figure 33 - Location of Piezo Ignitor , Control Knobs and Switch A. This appliance is equipped with a piezo ignition device which lights the pilot. If piezo is not working properly see Match Lighting Instructions, page 30. B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas[...]

81D0107 29 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 30. 4. Turn g[...]

30 81D0107 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 [...]

81D0107 31 Note: All troubleshooting items are listed in order of operation. TROUBLESHOOTING W ARNING OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no spark at ODS/pilot. 1. Ignitor electrode positioned wrong. 1 Replace ignitor. 2. Ignitor electrode is broken. 2. Replace ignitor. 3. Ignitor electrode not connected [...]

32 81D0107 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 flame goes out when control knob is relea[...]

81D0107 33 6 1 2 3 4 7 5 7 REPLACEMENT P ARTS BURNER ASSEMBL Y 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[...]

34 81D0107 REPLACEMENT P ARTS LIST REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. BURNER ASSEMBL Y Item Qty NB18 NB24 Natural Propane Natural Propane 1 Piezo Ignitor 1 14D0503 14D0503 14D0503 14D0503 2 Piezo Wire 1 00K0632 00K0632 00K0632 00K0632 3 Burner 1 81D2004 81D2010 81D0515 81D0504 4 Control V alve 1 14D0467 14D0468 14D0467 14D04[...]

81D0107 35 2 3 4 5 6 7 8 1 REPLACEMENT P ARTS ARE A V AILABLE THROUGH YOUR RET AILER. REPLACEMENT P ARTS LIST 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 BERKLEY OAK REFRACT OR Y LOGS Item Descrip[...]

36 81D0107 NOTE REGARDING VENTED PRODUCTS This product must be installed by a licensed plumber or gas fi tter when installed within the Commonwealth of Massachu- setts. Any residence with a direct vent product must have a CO detector installed in the residence. Installation of the fi replace or vented gas log in the State of Massachusetts require[...]

81D0107 37 SPECIAL REQUIREMENTS CONTINUED 2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFP A 720 and be ANSI/UL 2034 listed and IAS certi fi ed. 3. SIGNAGE. A metal or plastic identi fi cation plate shall be permanently mounted to the exterior of the bui[...]

38 81D0107 NOTES[...]

81D0107 39 NOTES[...]

JUL Y 2008 P/N 81D0107 • 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 of proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners. FIVE YEAR W ARRANTY The following components are warrant[...]