Monessen Hearth NB18, NB24 operating instructions Measuring Heat Resistant Material for Mantel

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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, first measure the heat resistant mate- rial shown in Figure 6, then refer to Table B.

 

8" or More of

 

Heat Resistan

Hood

Material

 

Heater in

 

Fireplace or

 

Firebox

 

Figure 6 - Measuring Heat Resistant Material for Mantel

HEAT RESISTANT

MATERIAL

MEASUREMENT

REQUIREMENTS FOR SAFE INSTALLATION WITH WOODEN MANTEL,

SHELF OR OTHER COMBUSTIBLE PROJECTION

NB18

NB24

12" or more

Hood not required. Observe profiles (side

Hood not required. Observe profile (side

 

elevations) shown in Figure 7, page 14.

elevations) shown in Figure 9, page 15

8" to less than 12"

Install hood and observe profiles showin in

Install hood and observe profiles shown in

 

Figure 8, page 14, OR extend heat resis-

Figure 8, page 14; OR extend heat resistant

 

tant material to at least 12” and observe

material to at least 12" and observe profiles

 

profiles shown in Figure 7, page 14.

shown in Figure 9, page 15.

Less than 8"

Extend heat resistant material to at least

Extend heat resistant material to at least 8",

 

8", install hood and observe profiles shown

install hood and observe profiles shown in

 

in Figure 8, page 14; OR extend heat resis-

Figure 8, page 14, OR extend heat resistant

 

tant material to at least 12" and observe

material to at least 12" and observe profiles

 

profiles shown in Figure 7, page 14.

shown in Figure 9, page 15.

 

 

 

TABLE B - Heat Resistant Material Heights and Mantel Location

81D0107

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Contents Read and Save These Instructions Model NB18, NB24What to do if YOU Smell GAS Contents Installer Important Safety InformationOwner Massachussetts Residents only Getting Started What YOU will Need for InstallationMake Sure YOU have Received ALL Parts Product Features and Specifications Codes General Installation InformationAdequate Combustion and Ventilation AIR BTU / Hr = Model Fireplace and Hearth DimensionsHeight of Restriction Minimum Depth of Fireplace/Firebox Placement in a Fireplace with a Restrictive BarrierSidewall and Ceiling Clearances Clearances and Height RequirementsClearances and Height Requirements Measuring Heat Resistant Material for Mantel Minimum Mantel Clearance with No Hood -NB18 Mum of 10 at a minimum of 28 above the opening Minimum Clearance above Combustible Flooring Floor ClearanceBefore Fully Installing the Unit Installing Vented ApplicationsBefore Installing the Appliance Damper Stop InstallationAssembly Procedure Installing Vented ApplicationsPlacing and Securing Appliance Flexible Tube Manual Shutoff Gas Supply Inlet Valve Connecting the GASMillivolt Valve Control Figure Checking GAS PressureConnecting Optional Wall Switch or Thermostat Electrical Wiring MillivoltATE Checking System Operation Connecting Remote ReceiverComplete Millivolt System Check Placing Rock Wool LOG PlacementPlacing Log #3 Cast Iron Grate Installation EMBER, GRATE, and Rock InstallationPlacing Flickering Embers Placing the Decorative RockChecking the Pilot Flame Flame AppearanceMillivolt Control and Thermostat Control Operating Instructions Checking the Burner FlameWhat to do if YOU Smell GAS Operating InstructionsTo Turn OFF GAS to Heater Cleaning and Servicing Operating Instructions and Cleaning and ServicingObserved Problem Possible Cause Remedy TroubleshootingODS/pilot lights, but flame Burner Assembly Replacement PartsAccessories Sold Separately Replacement Parts ListDescription Qty BO18-R BO18-F BO24-R BO24-F BO30-R BO30-F Berkley OAK Refractory LogsCarbon Monoxide Detector Requirements Special Requirements 81D0107 81D0107 Five Year Warranty Lifetime WarrantyBasic Warranty