Monessen Hearth NB18 Installation And Operating 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
WARNING
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 10/15 Rev. 14
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Table of Contents
Related Manuals for Monessen Hearth NB18
Summary of Contents for Monessen Hearth NB18
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Page 1: Installation And Operating Instructions
Vented/Unvented Gas Log Set Installation and Operating Instructions Models: NB18, NB24, NB18SCR, NB24SCR WARNING 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 IMPORTANT: Please read the installation and operation instructions and all warning before installing or using the appliance! 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 INSTALLER OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. Read these instructions carefully before installing or trying to operate this vent-free gas heater. IMPORTANT: WARNING: • Any change to this heater or its controls can be dangerous. -
Page 4: Codes
NB18/NB24 Gas Log Set IMPORTANT SAFETY INFORMATION MASSACHUSSETTS RESIDENTS ONLY: 18. Unvented gas heaters are a supplemental zone heater. They are not intended to be the primary heating appli- Refer to page 47 for additional information. ance. 19. Unvented gas heaters emit moisture into the living area. -
Page 5: Product Features And Specifi Cations
NB18/NB24 Gas Log Set PRODUCT FEATURES CHECK PARTS: GAS PRESSURES Verify contents to ensure you have received all parts. You Natural Propane (LP) should have the following: Inlet Minimum 5.0" w.c. 11.0" w.c. NB Models Inlet Maximum 10.5" w.c. 13.0" w.c. -
Page 6: Fireplace And Hearth Dimensions
NB18/NB24 Gas Log Set FIREPLACE AND HEARTH DIMENSIONS PLACEMENT IN FIREPLACE WITH A WARNING RESTRICTIVE BARRIER This appliance is for installation only in a solid-fuel The following are guidelines for placing a gas log set in burning masonry or UL127 factory-built fi replace, a fi... -
Page 7: Clearances And Height Requirements
NB18/NB24 Gas Log Set CLEARANCES AND HEIGHT REQUIREMENTS Heat resistant material (minimum requirements) with WARNING no wooden mantel or other combustible projection: The dimensions shown in Figures 3 through 11 and To install the gas logs into a fi replace with no wooden defi... - 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- tant material shown in Figure 5, then refer to Table B.
- Page 9 Figure 8 - Figure 6 - Minimum Mantel Clearance with No Hood — NB24 Minimum Mantel Clearance with No Hood — NB18 Example: A mantel may project from the wall a maximum Example: The bottom of the mantel may project from the of 2 ⁄...
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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 tile, which is closer than 14" to the base of the fi replace. -
Page 11: Fireplace Preparation
NB18/NB24 Gas Log Set FIREPLACE PREPARATION Before installing the appliance: WARNING • Turn off gas supply to fi replace or fi rebox. Before installing in a solid fuel burning fi replace, • The chimney fl ue and fi rebox must be cleaned of Have the fi... -
Page 12: Vented Application Installation
NB18/NB24 Gas Log Set VENTED APPLICATION INSTALLATION / SECURE APPLIANCE WARNING WARNING You must secure the gas log heater to the fi replace The fi replace and gas logs function as a system. If fl oor. If not, the entire unit may move when you the fi... -
Page 13: Gas And Valve Connection
NB18/NB24 Gas Log Set GAS AND VALVE CONNECTION WARNING WARNING Connecting directly to an unregulated propane/ Use new black iron or steel pipe. Internally tinned LPG tank can cause an explosion. copper or copper tubing can be used per National Fuel Code, section 2.6.3, providing gas meets... -
Page 14: Electrical Wiring - Millivolt
NB18/NB24 Gas Log Set ELECTRICAL WIRING - MILLIVOLT CONNECT OPTIONAL WALL SWITCH OR Label all wires prior to disconnection when THERMOSTAT servicing controls. Wiring errors can cause 1. Use 18 awg, two-wire cable, 15 feet maximum length. improper and dangerous operation. Verify 2. -
Page 15: Connect Remote Receiver
NB18/NB24 Gas Log Set ELECTRICAL WIRING - MILLIVOLT 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: Grate And Log Installation
fi bers. 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 CAST IRON GRATE INSTALLATION 3G-RW rock wool (for NB24) supplied with the unit. -
Page 17: Rock Wool Placement
NB18/NB24 Gas Log Set GRATE AND LOG INSTALLATION ROCK WOOL PLACEMENT Right Front Log #2 Before installing logs, place rockwool in dime size pieces evenly over small burner ports starting in the rear of the burner going towards the front. Avoid placing rock wool on slots on each side of rear burner and on large yellow fl... -
Page 18: Place The Decorative Rock
NB18/NB24 Gas Log Set GRATE AND LOG INSTALLATION 5. Place left front log (#5) on left pin located on burner and 8. Place right top log (#8) onto right rear (#3) and right left grate bar. Rest top right portion of log on right front front (#2) logs using locator on bottom of right top log. -
Page 19: Stony Creek Log Placement
NB18/NB24 Gas Log Set GRATE AND LOG INSTALLATION 5. Place front bottom left log (#5) on left pin located on STONY CREEK SC18/24/30-R LOGS burner and left grate bar. The right side of the log PLACEMENT should rest on log #4. Figure 30 1. -
Page 20: Kentucky Wildwood Log Placement
NB18/NB24 Gas Log Set GRATE AND LOG INSTALLATION 13. Place log #13 onto log #12 and top front right log (#10) Center Log #9 Mid Left Log #8 by placing notch on bottom of log onto locating block on log #12. Rest bottom of log onto log #10 and center log (#9). - Page 21 NB18/NB24 Gas Log Set GRATE AND LOG INSTALLATION 3. Place bottom rear left log #3 on pin on left rear of grate 6. Place center top log #6 on two (2) pins on top of log #2. assembly and push towards rear as far as possible.
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Page 22: 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 23: Operating Instructions - Millivolt
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — MILLIVOLT FOR YOUR SAFETY READ BEFORE LIGHTING WARNING 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 24: 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 25: Match Lighting Instructions
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — MILLIVOLT 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 26: Check Gas Pressure
NB18/NB24 Gas Log Set ELECTRICAL INSTALLATION — SIGNATURE COMMAND SYSTEM Pressure Inlet CHECK GAS PRESSURE 1. Check gas type. The gas supply must be the same as stated on the appliance’s rating decal. If the gas supply is different from the fi replace, STOP! Do not install the appliance. -
Page 27: Wiring Diagram - Signature Command System
NB18/NB24 Gas Log Set ELECTRICAL INSTALLATION — SIGNATURE COMMAND SYSTEM 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 28: Operating Instructions - Signature Command System
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — SIGNATURE COMMAND SYSTEM FOR YOUR SAFETY READ BEFORE LIGHTING WARNING If you do not follow these instruction exactly, a fi re or explosion may result causing property damage, personal injury or loss of life. -
Page 29: Operating Instructions
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — SIGNATURE COMMAND SYSTEM 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 30: Electrical Installation-Signature Command System
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — SIGNATURE COMMAND SYSTEM Command Center FEATURES To Thermopile Command Center RF Receiver • ON/OFF Easy access function operation and system confi gu- To Sensor ration To Sparker • Operation confi rmation/fault diagnostic indications... -
Page 31: Remote Transmitter Learn Function
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — SIGNATURE COMMAND SYSTEM Either mode benefi ts from the instantaneous battery back- REMOTE TRANSMITTER LEARN FUNCTION up, so you never have to worry about a power outage. (Default OFF unless packed with remote default will... -
Page 32: Functions/Operations From The Command Center
NB18/NB24 Gas Log Set OPERATING INSTRUCTIONS — SIGNATURE COMMAND SYSTEM two presses will decrease the fl ame height to medium FUNCTIONS/OPERATION FROM THE COM- and low. MAND CENTER 3. The third press on OFF will turn off the main burner. In Turning on the fi... -
Page 33: Touch Screen Remote Control Operation
NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION - SCR MODELS WARNING Turn appliance OFF (at the master switch) if you are away from your house for an extended period of time. Never leave anything on top of the surface of the transmitter. -
Page 34: Functions And Operations
NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION — SCR MODELS Setting Privacy Code on Transmitter Command Center Figure 51 The remote transmitter privacy code is preset in factory. In the event of activation or interference from other nearby transmissions, change the... - Page 35 NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION — SCR MODELS 1. Press the ON/up button to turn on Thermostat Mode the fi replace. The fl ame icon on Figure 56 the LCD displays High. Press the THERMO button to set the 2.
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Page 36: Safety Features
NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION—SCR MODELS 3. When Set Temp. is 1° F higher than Room Temp., Safety Features fl ame height will be on Low. 1. Low Battery Detection 4. When Set Temp. is equal to Room Temp., fl ame height When low battery condition occurs, the trans- does not change (stays on low). -
Page 37: Using The Mounting Base
NB18/NB24 Gas Log Set TOUCH SCREEN REMOTE CONTROL OPERATION—SCR MODELS 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 38: Cleaning & Servicing
NB18/NB24 Gas Log Set CLEANING AND SERVICING CLEANING AND SERVICING ANNUAL CLEANING/INSPECTION - Refer to parts diagram for location of items discussed below. Annual inspection and cleaning by your dealer or quali- • Inspect and clean burner air intake holes. Remove fi... -
Page 39: Troubleshooting
NB18/NB24 Gas Log Set TROUBLESHOOTING WARNING Turn appliance OFF and allow to cool before servicing. Only a qualifi ed service person should service and repair the heater. MILLIVOLT CONTROL SYSTEM NOTE: All troubleshooting items are listed in order of operation. -
Page 40: Signature Command System
NB18/NB24 Gas Log Set TROUBLESHOOTING WARNING 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 41 NB18/NB24 Gas Log Set TROUBLESHOOTING 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...
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Page 42: Replacement Parts
NB18/NB24 Gas Log Set REPLACEMENT PARTS BURNER ASSEMBLY, MILLIVOLT MODELS 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 14D0467 14D0468 14D0467... -
Page 43: Burner Assembly - Signature Command System
NB18/NB24 Gas Log Set REPLACEMENT PARTS BURNER ASSEMBLY, SIGNATURE COMMAND MODELS (NBSC, NBSCR) NB18SC NB18SCR NB24SC NB24SCR REF. DESCRIPTION QTY NATURAL PROPANE NATURAL PROPANE NATURAL PROPANE NATURAL PROPANE Burner 20303243 20303247 20303243 20303247 20303180 20303187 20303180 20303187 Control Valve 20303257... -
Page 44: Berkeley Oak Refractory Logs
NB18/NB24 Gas Log Set REPLACEMENT PARTS BERKELEY OAK REFRACTORY LOGS BENEATH #8 REF. DESCRIPTION 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 45: Stony Creek Refractory Logs
NB18/NB24 Gas Log Set REPLACEMENT PARTS STONY CREEK REFRACTORY LOGS 2 (Ember Chunk) 3 (Ember Chunk) REF. DESCRIPTION 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 46: 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 47: Massachusetts Residents Only
NB18/NB24 Gas Log Set MASSACHUSETTS RESIDENTS ONLY 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 48: 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.