Monessen Hearth DST30 User Manual

This is an unvented gas-fi red
heater. It uses air (oxygen) from
the room in which it is installed.
Provisions for adequate combustion
and ventilation air must be provided.
Refer to page 7.
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
If the information in this manual is not followed exactly,
a fi re or explosion may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or other fl ammable
vapors and liquids in the vicinity of this or any
other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
•If you cannot reach your gas supplier, call the
fi re department.
– Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
MODEL: DST30
Natural Gas or Propane/LPG • Control Type: Milli-Volt
UNVENTED GAS LOG HEATER OR
VENTED DECORATIVE APPLIANCE
INSTALLATION AND OPERATING INSTRUCTIONS

Monessen Hearth DST30 Specifications

General

Brand	Monessen Hearth
Model	DST30
Category	Gas Heater
Language	English

Summary

Important Safety Information

General Safety Warnings

Covers immediate hazards like fire, explosion, carbon monoxide, and general precautions.

Installation and Code Compliance

Ensures adherence to local codes, NFGC, and specific installation requirements for safety.

Operational Hazards and Precautions

Addresses drafts, fans, accessories, and specific risks associated with heater use.

Important Safety Information Continued

Environmental and Air Quality

Discusses combustion byproducts, moisture emission, and ventilation needs for optimal performance.

Product Usage and Limitations

Covers break-in period, elevation adjustments, gas type, and mobile home installation rules.

Critical Safety Scenarios

Details response to submersion, use with glass doors, and prohibition of solid fuel burning.

General Installation Information

Installation Codes and Standards

Adherence to local codes and the National Fuel Gas Code (ANSI Z223.1) or NFPA54 is required.

Combustion and Ventilation Air

Fireplace and Hearth Dimensions

Placement in a Fireplace with a Restrictive Barrier

Clearances and Height Requirements

Sidewall and Ceiling Clearances

Clearances and Height Requirements Continued

Floor Clearance

Fireplace Preparation

Installing Vented Applications

Vented Application Requirements

Securing the Appliance

Connecting the Gas

Gas Supply Connection

Details on using correct pipe materials, sizing, and installing a manual shutoff valve.

Gas Type Verification

Crucial step to ensure the gas supply matches the appliance's rating plate to prevent hazards.

Checking Gas Pressure

Pressure Test Procedure

Steps for checking gas pressure at the pilot and main burner using test ports.

Electrical Wiring (Milli-Volt) Continued

Log Placement

Operating Instructions

Pre-Lighting Safety Checks

Gas Leak Response

Detailed steps for immediate action if a gas odor is detected, prioritizing safety.

Operating Instructions Continued

Millivolt Control Lighting

Cleaning and Servicing

Troubleshooting

Ignitor and Pilot Issues

Troubleshooting no spark, no ignition, or pilot going out, covering common causes and remedies.

Operational Problems

Addresses unwanted odors, appliance shut-offs, and gas odor when the control knob is off.

Troubleshooting Continued

Flame and Burner Issues

Diagnoses issues like flame going out after release, burner backfire, smoke, and whistling noises.

No Gas to Pilot

Troubleshooting lack of gas to the pilot, including LP regulator and orifice issues.