Monessen Hearth NB24, NB18 Floor Clearance, Minimum Clearance above Combustible Flooring

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FLOOR CLEARANCE

The gas log heater must be installed at least 13/8" 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. See Figure 11.

OR

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. See Figure 12.

Heater in

Fireplace or

Firebox

Combustible

Material

13/8" Minimum

Figure 11 - Minimum Clearance above Combustible Flooring

This Distance May Now Be Less than 13/8"

Heater in

Fireplace or

Firebox

Combustible

Material

14" Minimum

Figure 12 - Minimum Clearance above Combustible Flooring with

Noncombustible Material Installed at Base of Fireplace

16

81D0107

Image 16

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 = Fireplace and Hearth Dimensions ModelPlacement in a Fireplace with a Restrictive Barrier Height of Restriction Minimum Depth of Fireplace/FireboxClearances and Height Requirements Sidewall and Ceiling ClearancesClearances 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 Floor Clearance Minimum Clearance above Combustible FlooringInstalling Vented Applications Before Fully Installing the UnitBefore Installing the Appliance Damper Stop InstallationAssembly Procedure Installing Vented ApplicationsPlacing and Securing Appliance Connecting the GAS Flexible Tube Manual Shutoff Gas Supply Inlet ValveChecking GAS Pressure Millivolt Valve Control FigureConnecting Optional Wall Switch or Thermostat Electrical Wiring MillivoltATE Checking System Operation Connecting Remote ReceiverComplete Millivolt System Check LOG Placement Placing Rock WoolPlacing Log #3 EMBER, GRATE, and Rock Installation Cast Iron Grate InstallationPlacing Flickering Embers Placing the Decorative RockChecking the Pilot Flame Flame AppearanceMillivolt Control and Thermostat Control Checking the Burner Flame Operating InstructionsOperating Instructions What to do if YOU Smell GASTo Turn OFF GAS to Heater Operating Instructions and Cleaning and Servicing Cleaning and ServicingTroubleshooting Observed Problem Possible Cause RemedyODS/pilot lights, but flame Replacement Parts Burner AssemblyReplacement Parts List Accessories Sold SeparatelyBerkley OAK Refractory Logs Description Qty BO18-R BO18-F BO24-R BO24-F BO30-R BO30-FCarbon Monoxide Detector Requirements Special Requirements 81D0107 81D0107 Five Year Warranty Lifetime WarrantyBasic Warranty