Contents | Monessen Hearth NB24, NB18 specification

CONTENTS

Important Safety Information	3
Getting Started	5
Product Features and Speciﬁcations	6
Natural Gas	6
Propane/LPG	6
Ignition Controls	6
Pilot/ODS	6
Thermal Generator	6
General Installation Information	7
Codes	7
Adequate Combustion and Ventilation Air	7
Fireplace and Hearth Dimensions	9
Placement in a Fireplace
with a Restrictive Barrier	10
Clearances and Height Requirements	11
Floor Clearance	16
Fireplace Preparation	17
Installing Vented Applications	18
Connecting the Gas	19
Checking Gas Pressure	20
Millivolt	20

Electrical Wiring (Millivolt)	21
Connecting Remote Receiver	22
Checking System Operation	22
Berkley Oak Log Placement	23
Ember, Grate, and Rock Installation	25
Optional Cast Iron Grate
and Andirons Installation	25
Flame Appearance	26
Checking Burner Flames	27
Operating Instructions	28
For Your Safety Read Before Lighting	28
Millivolt Control Lighting Instructions	29
Match Lighting Instructions	30
Cleaning Instructions	30
Troubleshooting	31
Replacement Parts	33
Burner Assembly	33
Logs	35
Warranty	Back page

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81D0107

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Monessen Hearth NB24, NB18 operating instructions Contents

Contents

What to do if YOU Smell GAS Model NB18, NB24Read and Save These Instructions Contents Owner Important Safety InformationInstaller Massachussetts Residents only Make Sure YOU have Received ALL Parts What YOU will Need for InstallationGetting Started Product Features and Specifications Adequate Combustion and Ventilation AIR General Installation InformationCodes BTU / Hr = Fireplace and Hearth Dimensions Model Placement in a Fireplace with a Restrictive Barrier Height of Restriction Minimum Depth of Fireplace/Firebox Clearances and Height Requirements Sidewall and Ceiling Clearances Clearances 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 Flooring Before Installing the Appliance Installing Vented ApplicationsBefore Fully Installing the Unit Damper Stop Installation Placing and Securing Appliance Installing Vented ApplicationsAssembly Procedure Connecting the GAS Flexible Tube Manual Shutoff Gas Supply Inlet Valve Checking GAS Pressure Millivolt Valve Control Figure ATE Electrical Wiring MillivoltConnecting Optional Wall Switch or Thermostat Complete Millivolt System Check Connecting Remote ReceiverChecking System Operation LOG Placement Placing Rock Wool Placing Log #3 Placing Flickering Embers EMBER, GRATE, and Rock InstallationCast Iron Grate Installation Placing the Decorative Rock Millivolt Control and Thermostat Control Flame AppearanceChecking the Pilot Flame Checking the Burner Flame Operating Instructions Operating Instructions What to do if YOU Smell GAS To Turn OFF GAS to Heater Operating Instructions and Cleaning and Servicing Cleaning and Servicing Troubleshooting Observed Problem Possible Cause Remedy ODS/pilot lights, but flame Replacement Parts Burner Assembly Replacement Parts List Accessories Sold Separately Berkley OAK Refractory Logs Description Qty BO18-R BO18-F BO24-R BO24-F BO30-R BO30-F Carbon Monoxide Detector Requirements Special Requirements 81D0107 81D0107 Basic Warranty Lifetime WarrantyFive Year Warranty