Monessen Hearth NB18, NB24 operating instructions Electrical Wiring Millivolt, Ate

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ELECTRICAL WIRING (MILLIVOLT)

The Millivolt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPER-

ATE.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

ODS

Pilot

										ODS
On/Off										Pilot
On/Off
Switch or										Millivolt
Optional										Valve
Wall
Wall
Switch,
Remote or
Remote or
T-Stat	TH = 3


	TP = 1
	TP = 1
	TP/TH = 2
	TP/TH = 2

Log Switch

Figure 17 - Wiring Diagram

Note: Log switch wires are not factory connected.

Connect log switch wires to the TH/TP and TH valve terminals as shown.

CONNECTING OPTIONAL WALL SWITCH OR THERMOSTAT

1.Use 18 awg, two-wire cable, 15 feet maximum length.

2.At one end of the cable, connect both wires to the wall switch or thermostat. At the other end, connect one wire to TP/TH and one wire to TH, or connect the wall switch/thermostat to the two male (0.25") terminals on the left side of the unit. The color of the wires does not matter.

81D0107

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Contents Model NB18, NB24 Read and Save These InstructionsWhat to do if YOU Smell GAS Contents Important Safety Information InstallerOwner Massachussetts Residents only What YOU will Need for Installation Getting StartedMake Sure YOU have Received ALL Parts Product Features and Specifications General Installation Information CodesAdequate 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 InstallationInstalling Vented Applications Assembly ProcedurePlacing and Securing Appliance Flexible Tube Manual Shutoff Gas Supply Inlet Valve Connecting the GASMillivolt Valve Control Figure Checking GAS PressureElectrical Wiring Millivolt Connecting Optional Wall Switch or ThermostatATE Connecting Remote Receiver Checking System OperationComplete Millivolt System Check Placing Rock Wool LOG PlacementPlacing Log #3 Cast Iron Grate Installation EMBER, GRATE, and Rock InstallationPlacing Flickering Embers Placing the Decorative RockFlame Appearance Checking the Pilot FlameMillivolt 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 Lifetime Warranty Five Year WarrantyBasic Warranty