Monessen Hearth NB18 Installation And Operating Instructions Manual
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Monessen Hearth NB18 Installation And Operating Instructions Manual

Monessen Hearth NB18 Installation And Operating Instructions Manual

Unvented gas log heater or vented decorative appliance
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Download this manual See also: Instruction and Installation Manual, Installation Instructions and Operating Manual
UNVENTED GAS LOG
HEATER or
VENTED DECORATIVE
APPLIANCE
INSTALLATION AND OPERATING
INSTRUCTIONS
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.
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.
If the information in this manual is not followed exactly,
a fi re or explosion may result causing property damage,
personal injury or loss of life.
–
–
–
READ AND SAVE THESE INSTRUCTIONS
MODEL: NB18, NB24
Natural Gas or Liquid Propane
Control Type: Millivolt
WARNINGS
Do not store or use gasoline or other fl ammable
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 fi re
department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.

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Summary of Contents for Monessen Hearth NB18

  • Page 1 • If you cannot reach your gas supplier, call the fi re department. – Installation and service must be performed by a qualified installer, service agency or the gas supplier. READ AND SAVE THESE INSTRUCTIONS MODEL: NB18, NB24 Natural Gas or Liquid Propane Control Type: Millivolt WARNINGS...

  • Page 2: Table Of Contents

    CONTENTS Important Safety Information ... 3 Getting Started ... 5 Product Features and Specifi cations ... 6 Natural Gas ... 6 Propane/LPG ... 6 Ignition Controls ... 6 Pilot/ODS ... 6 Thermal Generator ... 6 General Installation Information ... 7 Codes ...

  • Page 3: Important Safety Information

    INSTALLER Please leave these instructions with the appliance. Read these instructions carefully before installing or trying to operate this vent-free gas heater. • 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 fi re, burns, explosion or carbon monoxide poisoning.
  • Page 4 IMPORTANT SAFETY INFORMATION 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.

  • Page 5: Getting Started

    MAKE SURE YOU HAVE RECEIVED ALL PARTS: Check your packing list to verify that all listed parts have been received. You should have the following: • Unvented Gas Log Burner Assembly • Installation/Operating Instructions • Ceramic Fiber Logs / Refractory Logs •...

  • Page 6: Product Features And Specifi Cations

    PRODUCT FEATURES NATURAL GAS NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 natural gas systems operating at higher pressure. MILLIVOLT Regulator Pressure Setting: 3.5" w.c. Pilot Regulator: 3.5" w.c. Gas Inlet Pressure: Max 10 Min.

  • Page 7: General Installation Information

    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… 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.
  • Page 8 GENERAL INSTALLATION INFORMATION Figure 1 - Example of a Large Room with 1/2 Wall Divider The following formula can be used to determine the maximum heater rating per the definition of unconfined space: Hr = Consider two connecting rooms with an open area between, with the following dimensions: Hr = If there were a door between the two rooms the calculation would be based only on the room with the heater.

  • Page 9: Fireplace And Hearth Dimensions

    Type Unvented Room Heaters per IAS Requirement No. 2-97 ANSI Z21.91-2001 (typically referred to as a "Universal Firebox"), as long as firebox hearth dimensions meet the minimum hearth dimensions shown below. Model NB18 with BO18(R,F) NB24 with BO24(R,F) NB24 with BO30(R,F) Without front grate installed “B”...

  • Page 10: Placement In A Fireplace With A Restrictive Barrier

    PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER IMPORTANT INFORMATION FOR THE INSTALLATION 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.

  • Page 11: Clearances And Height Requirements

    The dimensions shown in Figures 4 through 12 and defi ned in the fi replace manufacturer's instructions are minimum clearances to maintain when installing this heater. Left and right clearances are determined when facing the front of the heater. When heater is installed into a ventless fi rebox, minimum clearances, as specifi ed by the ventless fi...
  • Page 12 Heat Resistant Material Heater in Fireplace or Firebox Figure 5 - Measuring Heat Resistant Material REQUIREMENTS FOR SAFE INSTALLATION NB18 Hood not required. Hood not required. Extend heat resistant material and 8” AND install hood. See Figure 5. Measure this...
  • Page 13 Heater in Fireplace or Firebox SHELF OR OTHER COMBUSTIBLE PROJECTION NB18 Hood not required. Observe profi le (side elevations) shown in Figure 9, page 15 Install hood and observe profi les shown in Figure 8, page 14; OR extend heat resistant material to at least 12"...
  • Page 14 CLEARANCES HEIGHT REQUIREMENTS 10" 8" 6" " Heat Resistant Material Heater in Fireplace or Firebox Figure 7 - Minimum Mantel Clearance with No Hood -NB18 12" 10" 8" 6" " Heat Resistant Material 8" Hood Heater in Fireplace or Firebox Figure 8 - Minimum Mantel Clearance with Hood - All Models 8"...
  • Page 15 10" or less Heat Resistant Material Heater in Fireplace or Firebox Figure 9 - Minimum Mantel Clearance with No Hood — NB24 7" 6" 4" Figure 10 - Minimum Mantel Clearance with Hood - NB24 81D0107 CLEARANCES 12" min. 28" Example: The bottom of the mantel may project from the wall a maxi- mum of 10"...

  • Page 16: Floor Clearance

    FLOOR CLEARANCE The gas log heater must be installed at least 1 is closer than 14" to the base of the fireplace. The minimum distance must be maintained from the top surface of carpeting, tile, etc. See Figure 11. The gas log heater may be installed nearer to the floor if a minimum of 14" of noncombustible material such as slate or marble is installed between the base of the fireplace and the combustible flooring.

  • Page 17: Fireplace Preparation

    BEFORE FULLY INSTALLING 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, drafting may cause pilot outage or sooting. Use a heat resistant sealant. Do not seal the chimney flue damper. INSTALLING VENTED APPLICATIONS Manual and Millivolt controlled gas logs may be installed as a vented decorative log set in compliance with ANSI Z21.60 and National Fuel Gas Code, Section 6.6.

  • Page 18: Installing Vented Applications

    INSTALLING VENTED APPLICATIONS PLACING AND SECURING APPLIANCE You must secure the gas log heater to the fi replace fl oor. If not, the entire unit may move when you adjust the controls. Movement of unit may cause shifting of the gas logs which leads to sooting and improper burning.

  • Page 19: Connecting The Gas

    NOTICE: A qualifi ed 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 sulfi de limits, and where permitted by local codes.

  • Page 20: Checking Gas Pressure

    CHECKING GAS PRESSURE Connecting directly to an unregulated propane/LPG tank can cause an explosion. Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after com- pleting connection. DO NOT USE AN OPEN FLAME. Check the gas pressure with the appliance burning and the control set to HIGH.

  • Page 21: Electrical Wiring (Millivolt)

    The Millivolt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPER- ATE. Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. On/Off Switch or Optional...

  • Page 22: Connecting Remote Receiver

    ELECTRICAL WIRING (MILLIVOLT) 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. Do not let wires touch grate or burner.

  • Page 23: Berkley Oak Log Placement

    fi rmly positioned in the appliance. Never add additional logs or embellishments such as pine cones, vermiculite or rock wool to the heater. Only use the logs and 2G-RW rock wool (for NB18), or 3G-RW rock wool (for NB24) supplied with the unit.
  • Page 24 LOG PLACEMENT 4. Place left rear log (#4) on pin located on rear support bracket on left side. See Figure 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 log. See Figure 24 6.

  • Page 25: Ember, Grate, And Rock Installation

    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 stacking these embers on top of each other.

  • Page 26: Flame Appearance

    FLAME APPEARANCE Flames from the pilot and 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- mocouple tip for natural.

  • Page 27: Checking Burner Flames

    CHECKING THE BURNER FLAME 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.

  • Page 28: Operating Instructions

    OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTING 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 is heavier than air and will settle on the floor.

  • Page 29: Millivolt Control Lighting Instructions

    Millivolt 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, refer to instructions for Match Lighting Instructions, page 30.

  • Page 30: Match Lighting Instructions

    OPERATING INSTRUCTIONS MATCH 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. 3.

  • Page 31: Troubleshooting

    Turn appliance OFF and allow to cool before servicing. Only a qualifi ed service person should service and repair the heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE When ignitor button is 1. Ignitor electrode positioned wrong. pressed, there is no spark at ODS/pilot.
  • Page 32 TROUBLESHOOTING If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfi re when lit. If the gas quality or pressure is low, contact your local gas supplier immediately. OBSERVED PROBLEM POSSIBLE CAUSE ODS/pilot lights, but flame 1.

  • Page 33: Replacement Parts

    REPLACEMENT PARTS BURNER ASSEMBLY Failure to position the parts in accordance with these diagrams or failure to use only parts specifi cally approved with this appliance may result in property damage or personal injury. 81D0107...

  • Page 34: Replacement Parts List

    14D0468 14D0473 14D0477 32D0232 32D0232 14D0469 — Part Number Flexcon 30 MVWS RCB, RCMT, WMTD RCST, RCT, WWTD RRCE RRCM ELSK UAI9 2G-RW (NB18) 3G-RW (NB24) FBE-.1G NB24 Propane Natural 14D0503 14D0503 00K0632 00K0632 81D0515 81D0504 14D0467 14D0468 14D0473 14D0477...

  • Page 35: Logs

    REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. BERKLEY OAK REFRACTORY LOGS Item Description Ember Chunk Right Front Log Right Rear Log Left Rear Log Left Front Log Middle Left Log Left Top Log Right Top Log 81D0107 BO18-R BO18-F BO24-R 81D0058 81D0082 81D0110...
  • Page 36 MASSACHUSETTS RESIDENTS ONLY: PLEASE READ AND FOLLOW THESE SPECIAL REQUIREMENTS 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...
  • Page 37 2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certifi ed. 3. SIGNAGE. A metal or plastic identifi cation plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment.
  • Page 38 NOTES 81D0107...
  • Page 39 NOTES 81D0107...

  • Page 40: Warranty

    Ceramic Fiber Logs and Aluminized Burners. BASIC WARRANTY Monessen Hearth Systems (MHS) warrants the components and materials in your gas appliance to be free from manufacturing and material defects for a period of two years from date of installation. After installation, if any of the components manufactured by MHS in the appliance are found to be defective in materials or workmanship, MHS will, at its option, replace or repair the defective components at no charge to the original owner.

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