Modine Hot Dawg Gas Fired Unit Heater User Manual

Introduction

This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Modine Hot Dawg Gas Fired Unit Heater, Model HD125AS111FBAN. This unit is designed to provide reliable heating with an input of 125,000 BTU/H and an output of 100,000 BTU/H, capable of heating areas up to 3136 square feet. Please read this manual thoroughly before installation or operation to ensure proper use and to prevent potential hazards.

Figure 1: Modine Hot Dawg Gas Fired Unit Heater (Model HD125AS111FBAN)

This image shows the Modine Hot Dawg Gas Fired Unit Heater, a gray cabinet-style unit with horizontal louvers on the front for heat distribution. The "HOT DAWG" logo is visible on the side panel.

Safety Information

Your safety and the safety of others are very important. Many safety messages are provided in this manual and on your appliance. Always read and obey all safety messages.

General Safety Precautions:

• Read all instructions before installing or operating this heater.
• Proper Installation: Installation must be performed by a qualified installer, service agency, or gas supplier. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death.
• Ventilation: Ensure adequate ventilation in the area where the heater is installed. This unit is designed for outdoor usage, but if installed in an enclosed space like a garage or workshop, proper venting of combustion byproducts is critical.
• Gas Supply: Verify that the gas supply type (Natural Gas) matches the heater's requirements.
• Electrical Connection: Ensure electrical connections comply with local codes and the heater's specifications (2.2 Amps).
• Clearances: Maintain proper clearances from combustible materials as specified in the installation instructions.
• Carbon Monoxide: This heater produces carbon monoxide, which is an odorless and colorless gas. Improper installation or ventilation can lead to carbon monoxide poisoning, which can be fatal. Install carbon monoxide detectors.
• Flammable Materials: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
• Children and Pets: Keep children and pets away from the heater during operation.

Setup and Installation

The Modine Hot Dawg unit heater is designed for efficient heating in spaces such as garages, workshops, and offices. Proper installation is crucial for safety and performance.

Pre-Installation Checklist:

• Location: Select a suitable location that allows for proper clearances, ventilation, and access for maintenance. The unit is rated for outdoor usage, but typically heats an indoor space.
• Mounting: This unit is designed for floor mount. Ensure the mounting surface is level and capable of supporting the unit's weight (approximately 125 pounds).
• Dimensions: Account for the unit's dimensions: 35.5"D x 31"W x 21.5"H.
• Gas Supply: Ensure a natural gas supply line with a 1/2 inch connection type is available at the installation site.
• Electrical Supply: A dedicated electrical circuit capable of providing 2.2 Amps is required.
• Ventilation System: Plan for the proper venting of combustion gases to the outside atmosphere.

Installation Steps (Summary - Refer to full installation guide for details):

1. Position the Unit: Place the heater on the prepared floor mount location, ensuring it is level and stable.
2. Connect Gas Line: Connect the natural gas supply line to the heater's 1/2 inch gas inlet. Use appropriate gas-rated sealant and ensure all connections are leak-free.
3. Connect Electrical Wiring: Wire the heater to the dedicated electrical circuit according to local electrical codes and the wiring diagram provided with the unit.
4. Install Venting: Install the exhaust venting system to safely direct combustion byproducts outdoors. Ensure proper slope and sealing.
5. Thermostat Installation: Install a compatible thermostat in a suitable location, away from drafts and direct heat sources, to control the heater's operation.
6. Leak Test: After all connections are made, perform a thorough leak test on the gas lines.
7. Initial Startup: Follow the initial startup procedure outlined in the comprehensive installation manual to purge air from the gas lines and verify proper ignition and operation.

Figure 2: Angled view of the Modine Hot Dawg heater, highlighting its compact design suitable for various installations.

This image provides an angled perspective of the Modine Hot Dawg heater, showcasing its gray cabinet and the front louvers. This view helps in visualizing the unit's footprint for installation planning.

Operating Instructions

Once properly installed and connected, operating your Modine Hot Dawg heater is straightforward.

Normal Operation:

1. Power On: Ensure the electrical power switch to the heater is in the "ON" position.
2. Thermostat Setting: Set your room thermostat to the desired temperature. When the ambient temperature falls below the thermostat setting, the heater will automatically initiate its heating cycle.
3. Heating Cycle: The heater's fan will typically start first, followed by the ignition of the burner. Once the desired temperature is reached, the burner will shut off, and the fan may continue to run briefly to dissipate residual heat.
4. Heating Capacity: This unit provides 100,000 BTU/H of output, capable of heating approximately 3136 square feet.

Shutting Down the Heater:

• Temporary Shutdown: Lower the thermostat setting below the current room temperature. The heater will cease operation.
• Extended Shutdown: For extended periods of non-use, turn off the electrical power switch to the heater and close the manual gas shut-off valve.

Maintenance

Regular maintenance ensures the longevity and efficient operation of your Modine Hot Dawg heater. Always disconnect power and gas supply before performing any maintenance.

Annual Maintenance (Recommended by a Qualified Technician):

• Heat Exchanger Inspection: Check for any signs of cracks, corrosion, or damage.
• Burner Inspection: Clean burners and inspect for proper flame appearance.
• Ignition System Check: Verify proper operation of the igniter and flame sensor.
• Fan and Motor Inspection: Clean fan blades and check motor bearings for wear. Lubricate if necessary (refer to manufacturer's guidelines).
• Vent System Inspection: Ensure the vent pipe is clear of obstructions and properly sealed.
• Gas Pressure Check: Verify correct gas pressure at the manifold.
• Electrical Connections: Inspect all wiring and connections for tightness and signs of wear.

User Maintenance (Monthly/Seasonally):

• Clean Exterior: Wipe down the exterior of the unit with a damp cloth to remove dust and debris.
• Clear Obstructions: Ensure the area around the heater is clear of any obstructions that could block airflow or pose a fire hazard.
• Check for Unusual Noises/Odors: Listen for any abnormal sounds and report any gas odors immediately to a qualified technician.

Troubleshooting

This section provides solutions to common issues you might encounter with your Modine Hot Dawg heater. For problems not listed here or if solutions do not resolve the issue, contact a qualified service technician.

Specifications

The following table details the key specifications for the Modine Hot Dawg Gas Fired Unit Heater, Model HD125AS111FBAN.

Warranty and Support

For specific warranty information regarding your Modine Hot Dawg Gas Fired Unit Heater, please refer to the warranty card included with your product or visit the official Modine website. Warranty terms and conditions may vary.

If you require technical assistance, service, or have questions not covered in this manual, please contact Modine customer support or the authorized dealer from whom you purchased the unit. Ensure you have your model number (HD125AS111FBAN) and serial number ready when contacting support.

You can also refer to the seller, Monody Trading, for purchase-related support.