Monessen Hearth NB18 Installation Instructions Manual
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Monessen Hearth NB18 Installation Instructions Manual

Monessen Hearth NB18 Installation Instructions Manual

Vented/unvented gas log set
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Vented/Unvented Gas Log Set

Installation and Operating Instructions

Models: NB18, NB24, NB18SCR, NB24SCR
WARNINGS
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.
–
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 qualifi ed 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-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 4.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
81D0107 7/14 Rev. 13

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Summary of Contents for Monessen Hearth NB18

  • Page 1: Installation And Operating Instructions

    Vented/Unvented Gas Log Set Installation and Operating Instructions Models: NB18, NB24, NB18SCR, NB24SCR WARNINGS If the information in this manual is not followed exactly, a fi re or explosion may result causing This appliance may be installed in property damage, personal injury or loss of life.

  • Page 2: Table Of Contents

    NB18/NB24 Gas Log Set CONTENTS Thank you and congratulations on your purchase of a Monessen Log Set Please read the Installation and Operation Instructions before using the appliance! IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fi re hazard and will void the warranty.

  • Page 3: Important Safety Information

    NB18/NB24 Gas Log Set IMPORTANT SAFETY INFORMATION OWNER INSTALLER Please retain these instructions for future reference. Please leave these instructions with the appliance. 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: Codes

    NB18/NB24 Gas Log Set IMPORTANT SAFETY INFORMATION 18. Unvented gas heaters are a supplemental zone heater. MASSACHUSSETTS RESIDENTS ONLY: They are not intended to be the primary heating appli- ance. Refer to Page 46 for 19. Unvented gas heaters emit moisture into the living additional information.

  • Page 5: Product Features And Specifi Cations

    NB18/NB24 Gas Log Set PRODUCT FEATURES MAKE SURE YOU HAVE RECEIVED ALL GAS PRESSURES PARTS: Natural Propane (LP) Check your packing list to verify that all listed parts have Inlet Minimum 5.0" w.c. 11.0" w.c. been received. You should have the following: Inlet Maximum 10.5"...

  • Page 6: Fireplace And Hearth Dimensions

    NB18/NB24 Gas Log Set FIREPLACE AND HEARTH DIMENSIONS IMPORTANT INFORMATION FOR THE This appliance is for installation only in a INSTALLATION OF THIS GAS LOG SET solid-fuel burning masonry or UL127 factory- built fi replace, vent free appliance, or in PLACEMENT IN FIREPLACE WITH A listed ventless fi...

  • Page 7: Clearances And Height Requirements

    NB18/NB24 Gas Log Set CLEARANCES HEIGHT REQUIREMENTS The dimensions shown in Figures 3 through Heat resistant material (minimum requirements) with 11 and defi ned in the fi replace manufacturer's no wooden mantel or other combustible projection: instructions are minimum clearances to To install the gas logs into a fi...
  • Page 8 NB18/NB24 Gas Log Set CLEARANCES and HEIGHT REQUIREMENTS 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, fi rst measure the heat resis- 8"...
  • Page 9 CLEARANCES HEIGHT REQUIREMENTS NB18/NB24 Gas Log Set 10" or less 10" 8" 6" 2 " Heat Heat Resistant 28" Resistant Material Material 12" min. 8" 14" 20 " 24 " 28" Figure 8 - Minimum Mantel Heater in Heater in...

  • Page 10: Floor Clearance

    NB18/NB24 Gas Log Set FLOOR CLEARANCE The gas log heater must be installed at least 1 ⁄ " above any combustible fl ooring material, such as carpeting or The gas log heater may be installed nearer to the fl oor if a tile, which is closer than 14"...

  • Page 11: Fireplace Preparation

    FIREPLACE PREPARATION NB18/NB24 Gas Log Set Before installing the appliance: Before installing in a solid fuel burning fireplace, The chimney flue and firebox • Turn off gas supply to fi replace or fi rebox. must be cleaned of soot, creosote, ashes •...

  • Page 12: Vented Application Installation

    NB18/NB24 Gas Log Set VENTED APPLICATION INSTALLATION / SECURE APPLIANCE You must secure the gas log heater to VENTED APPLICATIONS ONLY the fireplace floor. If not, the entire unit may move when you adjust the controls. The fi replace and gas logs function as a Movement of unit may cause shifting of system.

  • Page 13: Gas Line Connection

    NB18/NB24 Gas Log Set GAS LINE CONNECTION Use new black iron or steel pipe. Internally tinned copper or copper tubing can be Connecting directly to an unregulated pro- used per National Fuel Code, section 2.6.3, pane/LPG tank can cause an explosion.

  • Page 14: Electrical Wiring - Millivolt

    NB18/NB24 Gas Log Set ELECTRICAL WIRING - MILLIVOLT Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. The millivolt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPERATE.

  • Page 15: Connect Remote Receiver

    ELECTRICAL WIRING - MILLIVOLT NB18/NB24 Gas Log Set CONNECT REMOTE RECEIVER A. Complete Millivolt System Check 1. Set remote receiver. See instructions included in (“A” Reading - Thermostat contacts CLOSED - receiver kit. Control Knob “ON” - Main burner should turn 2.

  • Page 16: Final Installation

    Only use the logs and 2G-RW rock wool (for NB18), or 3G-RW rock wool (for NB24) supplied with the unit. Failure to position the parts in accordance with diagrams below or to use only parts specifi...

  • Page 17: Rock Wool Placement

    LOG PLACEMENT NB18/NB24 Gas Log Set ROCK WOOL PLACEMENT Before installing logs, place rockwool in dime size pieces • Use only rock wool provided with log evenly over small burner ports starting in the rear of the set. burner going towards the front. Avoid placing rock wool on •...

  • Page 18: Log Placement

    NB18/NB24 Gas Log Set LOG PLACEMENT Right Rear Log #3 4. Place left rear log (#4) on pin located on rear support bracket on left side. Figure 23 Left Rear Log #4 LG631 Figure 22 - Place Right Rear Log #3 5.

  • Page 19: Ember And Rock Placement

    LOG PLACEMENT NB18/NB24 Gas Log Set Middle Left Log #6 6. Place top left log (#6) on unit by placing grooved portion of log onto left grate bar with bark facing out- ward. Rest front part of log in groove on left front log.

  • Page 20: Stoney Creek Log Placement

    NB18/NB24 Gas Log Set LOG PLACEMENT STONEY CREEK SC18/24/30-R LOGS PLACEMENT 1. Place bottom log (#1) on two (2) pins on rear of grate assembly and push towards rear as far as possible. Bottom Rear Log #1 Figure 28 Figure 28 LG1065 2.
  • Page 21 LOG PLACEMENT NB18/NB24 Gas Log Set Mid Right Log #6 5. Place front bottom left log (#5) on left pin located on burner and left grate bar. The right side of the log Front Bottom Left should rest on log #4. Figure 31 Log #5 6.
  • Page 22 NB18/NB24 Gas Log Set LOG PLACEMENT 10. Place top front right log (#10) onto Top Front Right Top Front Left Log Log #10 mid right log (#6) by placing notch on bottom of log onto locating block on log #6. Rest bottom end of log onto grate bar.

  • Page 23: Kentucky Wildwood Log

    LOG PLACEMENT NB18/NB24 Gas Log Set KENTUCKY WILDWOOD KW18-R, KW24-R AND KW30-R LOGS PLACEMENT Log #1 1. Place bottom front right log #1 on right pin located on burner and right grate bar. Figure 37 LG1169 Log #2 2. Place bottom rear right log...
  • Page 24 NB18/NB24 Gas Log Set LOG PLACEMENT 4. Place bottom front left log #4 on left pin located on burner and left grate bar. Log #4 Figure 40 LG1172 5. Place center left log #5 on top of log #4 on left...
  • Page 25 LOG PLACEMENT NB18/NB24 Gas Log Set 6. Place center top log #6 on Log #6 two (2) pins on top of log #2. The front end of log #6 should rest on log #4. Figure 42 LG1174a Log #7 7. Place top right log #7 on the two (2) pins located on log #2 and log #1.

  • Page 26: Flame Appearance

    NB18/NB24 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 fl ames visually during operation. CHECK THE PILOT FLAME The pilot fl ame must always be present when the heater is in operation.

  • Page 27: For Your Safety Read Before Lighting

    OPERATING INSTRUCTIONS - MILLIVOLT NB18/NB24 Gas Log Set FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these instruction exactly, a fi re 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 29.

  • Page 28: Millivolt Control Lighting Instructions

    NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS - MILLIVOLT 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 29.

  • Page 29: Match Lighting Instructions

    OPERATING INSTRUCTIONS - MILLIVOLT NB18/NB24 Gas Log Set 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 fl...

  • Page 30: Command Center Wall Installation

    NB18/NB24 Gas Log Set CHECK GAS PRESSURE & ELECTRICAL INSTALLATION - SIGNATURE COMMAND 1. Check gas type. The gas supply must be the same as Pressure Inlet stated on the appliance’s rating decal. If the gas supply is different from the fi replace, STOP! Do not install the appliance.

  • Page 31: Wiring Diagram - Scs

    ELECTRICAL INSTALLATION - SIGNATURE COMMAND NB18/NB24 Gas Log Set Thermocouple Thermocouple Module Pilot Orange RF Receiver ON/OFF Button Control Board Black / Thermopile Red / Thermopile Sensor Ignitor / Sparker Plug-in Connector Control Board to Command Center OFF/LO NOTE: Wall switch wires must...

  • Page 32: Operating Instructions - Signature Command

    NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS - SIGNATURE COMMAND FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these instruction exactly, a fi re or explosion may result causing property damage, personal injury or loss of life. A. This appliance is equipped with an ignition device which automatically lights the pilot. Refer to the instructions.

  • Page 33: Operating Instructions

    OPERATING INSTRUCTIONS - SIGNATURE COMMAND NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS 1. STOP! Read the safety information above. 2. This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

  • Page 34: Signature Command System Operation Instructions

    NB18/NB24 Gas Log Set SIGNATURE COMMAND SYSTEM OPERATION INSTRUCTIONS FEATURES To Thermopile RF Receiver Command Center ON/OFF To Sensor • Easy Access Function Operation and System Confi gura- To Sparker tion • Operation Confi rmation/Fault Diagnostic Indications NG/LP Conversion (LED/Buzzer) •...
  • Page 35 SIGNATURE COMMAND SYSTEM OPERATION INSTRUCTIONS NB18/NB24 Gas Log Set NOTE: By disabling this feature, your fi replace may con- SYSTEM CONFIGURATION/SETUP tinue to operate unattended. All System confi guration/setup is done on the Command 2. When the master switch is in the ON position (“-”), press- Center.

  • Page 36: Signature Command System Operation Instructions

    NB18/NB24 Gas Log Set SIGNATURE COMMAND SYSTEM OPERATION INSTRUCTIONS FUNCTIONS/OPERATION (from the Command 3. The third press on OFF will turn off the main burner. In standing pilot confi guration, the pilot will stay; in inter- Center) mittent pilot confi guration, the pilot will be shut off.

  • Page 37: Touch Screen Remote Control Operation

    TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS NB18/NB24 Gas Log Set Due to the sensitive temperature monitoring components in the transmitter, it is necessary to allow the transmitter to stabilize to room tem- perature before accurate room temperatures are displayed. If the transmitter is activated...
  • Page 38 NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS Setting Privacy Code on Transmitter Figure 52 Command The remote transmitter privacy Center code is preset in factory. In the event of activation or interfer- ence from other nearby trans-...
  • Page 39 TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS NB18/NB24 Gas Log Set 1. Press the ON/up button to turn b. Use the OFF/down buttons to decrease the Set on the fi replace. The fl ame icon Time to zero Or on the LCD displays High.

  • Page 40: Safety Features

    NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS 2. When the current setting is B), pressing TIMER button There is no manual fl ame height adjustment. and THERMO button at the same time for 3 seconds NOTE: there will a 10 second delay for the fl...
  • Page 41 TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS NB18/NB24 Gas Log Set  Using the Mounting Base The transmitter comes with a mounting base which allows you to hang the transmitter on the wall. 1. Secure the mounting base on the wall with supplied screws.

  • Page 42: Cleaning & Servicing

    NB18/NB24 Gas Log Set CLEANING AND SERVICING CLEANING AND SERVICING ANNUAL CLEANING/INSPECTION - Refer to parts Annual inspection and cleaning by your dealer or quali- diagram for location of items discussed below. fi ed service technician is recommended to prevent •...

  • Page 43: Troubleshooting

    TROUBLESHOOTING NB18/NB24 Gas Log Set 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. Solution Problem Possible Cause 1.
  • Page 44 NB18/NB24 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 backfi re when lit. If the gas quality or pressure is low, contact your local gas supplier immediately.

  • Page 45: Signature Command System

    TROUBLESHOOTING NB18/NB24 Gas Log Set SIGNATURE COMMAND SYSTEM ACTION OPERATION FAULT DIAGNOSIS Make sure Command Install batteries and/or Using Battery polarity wrong? Re-install batteries Center and plug in the AC board battery? No beep in about the control 8 seconds...

  • Page 46: Replacement Parts

    NB18/NB24 Gas Log Set REPLACEMENT PARTS BURNER ASSEMBLY NB Millivolt Models BURNER ASSEMBLY NB18MV NB24MV Ref. Description Natural Propane Natural Propane Piezo Ignitor 14D0503 014D0503 14D0503 14D0503 Piezo Wire 00K0632 00K0632 00K0632 00K0632 Burner 81D2004 81D2010 81D0515 81D0504 Control Valve...

  • Page 47: Burner Assembly - Scs

    REPLACEMENT PARTS NB18/NB24 Gas Log Set NB Signature Command Models (NBSC, NBSCR) BURNER ASSEMBLY NB18SC NB18SCR NB24SC NB24SCR Ref. Description Qty. Nat. Nat. Nat. 1. Burner 20303243 20303247 20303243 20303247 20303180 20303187 20303180 20303187 2. Control Valve 20303257 20303258 20303257 20303258 20303257 20303258 20303257 20303258 3.

  • Page 48: Berkeley Oak Refractory Logs

    NB18/NB24 Gas Log Set REPLACEMENT PARTS (BENEATH #8) BERKELEY OAK REFRACTORY LOGS Ref. Description Qty. BO18-R BO18-F BO24-R BO24-F BO30-R BO30-F Ember Chunk 81D0110 81D0109 81D0110 81D0109 81D0110 81D0109 Right Front Log 81D0059 81D0083 81D0067 81D0091 81D0075 81D0099 Right Rear Log...

  • Page 49: Stoney Creek Refractory Logs

    REPLACEMENT PARTS NB18/NB24 Gas Log Set 2 (Ember Chunk) 3 (Ember Chunk) STONEY CREEK REFRACTORY LOGS Ref. Description Qty. SC18-R SC24-R SC30-R Bottom Rear Log #1 20303558 20303570 20303570 Ember Chunk #2 (notch on both ends) 81D0110 81D0110 81D0110 Ember Chunk # 3 (notch on one end)

  • Page 50: Kentucky Wildwood Logs

    NB18/NB24 Gas Log Set REPLACEMENT PARTS KENTUCKY WILDWOOD REFRACTORY LOGS REF DESCRIPTION QUANTITY KW18-4 KW24-R KW30-R Bottom front right log, #1 20305902 20305813 20305909 Bottom rear right log, #2 20305903 20305814 20305910 Bottom rear left log, #3 20305904 20305815 20305911...

  • Page 51: Massachusetts Residents Only

    MASSACHUSETTS RESIDENTS ONLY NB18/NB24 Gas Log Set Please read and follow these special requirements 2. Approved Carbon Monoxide Detectors. Each carbon NOTE REGARDING VENTED PRODUCTS This product must be installed by a licensed plumber or monoxide detector as required in accordance with the above gas fi...

  • Page 52: Warranty

    LIMITED LIFETIME WARRANTY POLICY NB18/NB24 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.

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