Monessen Hearth MJ27NR, MJ27PR operating instructions Product Features and Specifications

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- All gas to the gas logs is shut off at the valve. - Valve position to light/maintain a standing pilot.

- Valve position to turn ON/OFF log set with remote switch/thermostat.

PRODUCT FEATURES and SPECIFICATIONS

Natural Gas

NOTE: An external regulator is required to reduce supply pressure to a maxi- mum of 10 1/2" W.C. on natural gas systems operating at higher pressure.

Millivolt

Regulator Pressure Setting: 3.5" w.c.

Pilot Regulator:	3.5" w.c.
Gas Inlet Pressure:	Max 101/2" w.c.
	Min. 5" w.c.

Model Number	Control	Gas Rate
Model Number	Control	Max. BTU/hr	Min. BTU/hr
MJ27NR	Millivolt	38,000	25,500

Propane/LPG

Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c.

Millivolt

Regulator Pressure Setting: 10" w.c

Gas Inlet Pressure:	Max. 13" w.c.
	Min. 11" w.c.

Model Number	Control	Gas Rate
Model Number	Control	Max. BTU/hr	Min. BTU/hr
MJ27PR	Millivolt	37,000	29,500

ignition controls

Piezo ignitor allows ignition of the pilot without the use of matches or batteries.

Millivolt control has three (3) positions:

OFF

IGN

ON

Pilot/ODS

The gas log heater is fitted with a specially designed safety pilot (ODS assembly) which senses the amount of oxygen available in the room and shuts the gas log heater off if the oxygen level begins to drop below a satisfactory level. The pilot can only be relit when adequate fresh air is available.

Thermal Generator

The millivolt gas log pilot is fitted with a Millivolt (thermopile) generator to provide power for remote activation.

86D0024

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Contents Models MJ27NR, MJ27PR Natural Gas or Liquid Propane Control Type Millivolt Hi/LowContents Owner Important Safety InformationInstaller Gas Code, Ansi Z223.l/NFPA54Never connect unit to private non Utility gas wells. This gas is commonlyKnown as wellhead gas What you will need for installation Getting StartedMake sure you have received all parts Product Features and Specifications American National Standards Institute, Inc General Installation InformationCodes National Fire Protection Association, IncBTU / hr = Fireplace and Hearth Dimensions Minimum Hearth DimensionPlacement in a fireplace with a restrictive barrier Height of Restriction Minimum Depth of Fireplace/FireboxClearances and Height Requirements Sidewall and Ceiling ClearancesRequirements for Safe Installation Heat ResistantMeasurement MJ27 Heat Resistant Requirements for Safe Installation with Wood Mantel, Shelf or Other Combustible Projection12 min Is an example of an unsafe mantel instal Floor Clearance Minimum Clearance above Combustible FlooringInstalling Vented Applications Before installing in a solid fuel burningPaint by a qualified chimney cleaner Fireplace PreparationInstalling Vented Applications Assembly procedurePlacing and Securing Appliance Connecting the GAS Gas ConnectionChecking GAS Pressure Millivolt Valve Control FigureElectrical Wiring Millivolt AteBurner Connecting Remote ReceiverDo not allow wires To touch grate orLOG Placement Install Log #8 Install Log #4 Place Flickering Embers Place Flickering Bright EmbersAssembly Instructions Andiron and rock installationANDIRON Installation Placing the decorative rockFlame Appearance Checking the pilot flameChecking the Burner Flame Operating InstructionsOperating Instructions What to do if YOU Smell GASTo Turn OFF GAS to Heater Operating Instructions / Cleaning and Servicing Cleaning and ServicingShould service and repair the heater TroubleshootingServicing. Only a qualified service person Turn appliance OFF and allow to cool beforeGoes out when control Replacement parts Description QtyReplacement Parts list LogsDescription Qty MJ27 Please Read and Follow These 86D0024 Basic Warranty Lifetime WarrantyFive Year Warranty If Warranty Service is NeededMhsc