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Majestic 18NB Installation And Operating Instructions Manual

Unvented gas log heater or vented decorative appliance
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Unvented Gas Log Heater
or
Vented Decorative
Appliance

Installation and Operating Instructions

Models: 18NB, 24NB
Natural Gas or Liquid Propane
Control Type: Millivolt
WARNINGS
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal 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 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 fire department.
–
Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
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-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 7.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
81D0108 7/09 Rev. 5

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  • Page 1: Installation And Operating Instructions

    Unvented Gas Log Heater Vented Decorative Appliance Installation and Operating Instructions Models: 18NB, 24NB Natural Gas or Liquid Propane Control Type: Millivolt WARNINGS If the information in this manual is not followed This appliance may be installed in an aftermarket,...

  • Page 2: Table Of Contents

    18NB/24NB Gas Log Set CONTENTS Electrical Wiring (Milli-volt) ........21 Important Safety Information ........3 Connecting Remote Receiver ...... Getting Started ............5 Checking System Operation ...... Product Features and Specifications ....6 Highland Oak Log Placement .......23 Natural Gas ............6 Ember, Grate, and Rock Installation .....

  • Page 3: 18Nb/24Nb Gas Log Set

    18NB/24NB Gas Log Set IMPORTANT SAFETY INFORMATION INSTALLER OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. IMPORTANT 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.
  • Page 4 IMPORTANT SAFETY INFORMATION 18NB/24NB Gas Log Set Continued from page 3 . The appliance must be isolated from the gas supply piping 19. During manufacturing, fabricating and shipping, various system by closing its equipment shutoff valve during any components of this appliance are treated with certain oils, pressure testing of the gas supply piping system at test films or bonding agents.

  • Page 5: Getting Started

    GETTING STARTED 18NB/24NB Gas Log Set 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 • Two () Plastic Bags Containing Crushed Volcanic Rock •...

  • Page 6: Product Features And Specifications

    18NB/24NB Gas Log Set PRODUCT FEATURES and SPECIFICATIONS NATURAL GAS NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 " W.C. on natural gas systems operating at higher pressure. MILLIVOLT Gas Rate Regulator Pressure Setting: 3.5" w.c.

  • Page 7: General Installation Information

    18NB/24NB Gas Log Set GENERAL INSTALLATION INFORMATION CODES Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z3.1 or NFPA54 which can be obtained from… American National Standards Institute, Inc.
  • Page 8 GENERAL INSTALLATION INFORMATION 18NB/24NB Gas Log Set Counter Fireplace Figure 1 - Example of a Large Room with 1/2 Wall Divider FP2250 clearances The following formula can be used to determine the maximum heater rating per the definition of unconfined space: (L1 + L) Ft x (W) Ft x (H) Ft.

  • Page 9: Fireplace And Hearth Dimensions

    FIREPLACE AND HEARTH DIMENSIONS 18NB/24NB Gas Log Set This appliance is for installation only in a solid-fuel burning masonry or UL127 factory- built fireplace, vent free appliance, or in listed ventless firebox enclosure. It has been design certified for these installations.

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

    PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER 18NB/24NB Gas Log Set 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 opening of the fireplace.

  • Page 11: Clearances And Height Requirements

    CLEARANCES HEIGHT REQUIREMENTS 18NB/24NB Gas Log Set The dimensions shown in Figures 4 through 12 and defined in the fireplace 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.
  • Page 12 CLEARANCES and HEIGHT REQUIREMENTS 18NB/24NB Gas Log Set 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 fireplace opening, measure the heat resistant material height, per Figure 5, then see TABLE A.
  • Page 13 CLEARANCES and HEIGHT REQUIREMENTS 18NB/24NB Gas Log Set Heat resistant material (minimum requirements) with wooden mantel or other combustible projection: To install the heater with a wooden mantel, shelf or other combustible projection above, first measure the heat resistant material shown in Figure 6, then refer to Table B.
  • Page 14 Example: A mantel may project from the wall a maximum of  " at a minimum of 14" above the opening, and a maximum of 6" at a minimum of 0 " above the opening. Figure 7 - Minimum Mantel Clearance with No Hood - 18NB 12" 10" 8" 6"...
  • Page 15 CLEARANCES HEIGHT REQUIREMENTS 18NB/24NB Gas Log Set 10" or less Heat  Resistant Material 12" min.  28" Heater in  Fireplace or  Example: The bottom of the mantel may project from the wall Firebox a maximum of 10" at a minimum of 8" above the opening. Figure 9 - Minimum Mantel Clearance with No Hood — 24NB 7"...

  • Page 16: Floor Clearance

    18NB/24NB Gas Log Set FLOOR CLEARANCE The gas log heater must be installed at least 1C\," above any combustible flooring material, such as carpeting or tile, which is closer than 14" to the base of the fireplace. The minimum distance must be maintained from the top surface of carpeting, tile, etc.

  • Page 17: Fireplace Preparation

    18NB/24NB Gas Log Set 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.

  • Page 18: Installing Vented Applications

    18NB/24NB Gas Log Set INSTALLING VENTED APPLICATIONS PLACE AND SECURE APPLIANCE You must secure the gas log heater to the fireplace floor. 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

    CONNECTING THE GAS 18NB/24NB Gas Log Set 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...

  • Page 20: Checking Gas Pressure

    18NB/24NB Gas Log Set 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 Connecting directly to an side of unit. To connect from the opposite side, route the pipe unregulated propane/LPG tank around the back portion of the unit.

  • Page 21: Millivolt

    18NB/24NB Gas Log Set ELECTRICAL WIRING (MILLI-VOLT) The milli-volt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPERATE. Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

  • Page 22: Connecting Remote Receiver

    18NB/24NB Gas Log Set ELECTRICAL WIRING (MILLI-VOLT) CONNECTING REMOTE RECEIVER 1. Set remote receiver. See instructions included in receiver kit. . Connect the two () 1/4" female connectors to the TP/TH and TH terminals on the control valve. Remote Wire...

  • Page 23: Highland Oak Log Placement

    18NB/24NB Gas Log Set 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 any traces of fibers.

  • Page 24: Log Placement

    18NB/24NB Gas Log Set LOG PLACEMENT 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. Figure 24 6. Place top left log (#6) on left rear log (#4) and left front log (#5) using locating grooves on bottom of #6 and locating blocks on logs #4 and #5.

  • Page 25: Ember, Grate, And Rock Installation

    EMBER, GRATE, AND ROCk INSTALLATION 18NB/24NB Gas Log Set PLACE 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.

  • Page 26: Flame Appearance

    18NB/24NB Gas Log Set 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. 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.

  • Page 27: Checking Burner Flames

    18NB/24NB Gas Log Set CHECkING THE BURNER FLAME In normal operation at full rate after 15 minutes, the following flame appearances should be observed: Figure 32 - Correct Appearance of Rear Flames of Highland Oak Burner will have a random pattern of yellow flames as shown in Figure 35. There should be glowing embers on the front burner.

  • Page 28: Operating Instructions

    OPERATING INSTRUCTIONS 18NB/24NB Gas Log Set FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these instruction exactly, a fire or explosion may result causing property damage, personal injury or loss of life. 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.

  • Page 29: Millivolt Control Lighting Instructions

    OPERATING INSTRUCTIONS 18NB/24NB Gas Log Set MILLI-VOLT CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information label. . 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.

  • Page 30: Match Lighting Instructions

    18NB/24NB Gas Log Set OPERATING INSTRUCTIONS and CLEANING AND SERVICING MATCH LIGHTING INSTRUCTIONS 1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.). . 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.

  • Page 31: Troubleshooting

    18NB/24NB Gas Log Set TROUBLESHOOTING Turn appliance OFF and allow to cool before servicing. Only a qualified service person should service and repair the heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is 1.
  • Page 32 18NB/24NB Gas Log Set TROUBLESHOOTING If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfire when lit. If the gas quality or pressure is low, contact your local gas supplier immediately.

  • Page 33: Replacement Parts

    18NB/24NB Gas Log Set REPLACEMENT PARTS BURNER ASSEMBLY 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. 81D0108...
  • Page 34 18NB/24NB Gas Log Set REPLACEMENT PARTS REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. BURNER ASSEMBLY 18NB 24NB Item Natural Propane Natural Propane Piezo Ignitor 14D0503 14D0503 14D0503 14D0503 Piezo Wire 00K063 00K063 00K063 00K063 Burner 81D004 81D010 81D0515 81D0504 Control Valve...

  • Page 35: Logs

    18NB/24NB Gas Log Set REPLACEMENT PARTS REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. HIGHLAND OAk REFRACTORY LOGS Item Description Qty. HO18-R HO18-F HO24-R HO24-F HO30-R HO30-F 1. Ember Chunk 81D0110 81D0109 81D0110 81D0109 81D0110 81D0109 . Right Front Log 81D0011...
  • Page 36 18NB/24NB Gas Log Set 81D0108...
  • Page 37 18NB/24NB Gas Log Set 81D0108...
  • Page 38 Massachusetts Residents Only — Please read and follow these special requirements 18NB/24NB Gas Log Set . Approved Carbon Monoxide Detectors. Each carbon NOTE REGARDING VENTED PRODUCTS monoxide detector as required in accordance with the above This product must be installed by a licensed plumber or gas fitter provisions shall comply with NFPA 70 and be ANSI/UL 034 when installed within the Commonwealth of Massachusetts.

  • Page 39: Warranty

    LIMITED LIFETIME WARRANTY POLICY 18NB/24NB Gas Log Set LIFETIME WARRANTY 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 WARRANTY The following components are warranted for 5 years to the original owner, subject of proof of purchase: Vent Free Ceramic Fiber Logs and Aluminized Burners.
  • Page 40 MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.com...

This manual is also suitable for:

24nb

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