Indledning
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.
Sikkerhedsoplysninger
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.
Generelle sikkerhedsforanstaltninger:
- Læs alle instruktioner before installing or operating this heater.
- Korrekt 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.
- Gasforsyning: Verify that the gas supply type (Natural Gas) matches the heater's requirements.
- Elektrisk tilslutning: Ensure electrical connections comply with local codes and the heater's specifications (2.2 Amps).
- Frirum: Maintain proper clearances from combustible materials as specified in the installation instructions.
- Carbonmonoxid: 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.
- Brandfarlige materialer: Opbevar eller brug ikke benzin eller andre brændbare dampe og væsker i nærheden af dette eller noget andet apparat.
- Børn og kæledyr: Hold børn og kæledyr væk fra varmeapparatet under drift.
Opsætning og 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.
Tjekliste før installation:
- Beliggenhed: 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.
- Montering: This unit is designed for floor mount. Ensure the mounting surface is level and capable of supporting the unit's weight (approximately 125 pounds).
- Dimensioner: Account for the unit's dimensions: 35.5"D x 31"W x 21.5"H.
- Gasforsyning: Ensure a natural gas supply line with a 1/2 inch connection type is available at the installation site.
- Elforsyning: A dedicated electrical circuit capable of providing 2.2 Amps er påkrævet.
- Ventilationssystem: Plan for the proper venting of combustion gases to the outside atmosphere.
Installation Steps (Summary - Refer to full installation guide for details):
- Placer enheden: Place the heater on the prepared floor mount location, ensuring it is level and stable.
- 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.
- Tilslut elektriske ledninger: Wire the heater to the dedicated electrical circuit according to local electrical codes and the wiring diagram provided with the unit.
- Install Venting: Install the exhaust venting system to safely direct combustion byproducts outdoors. Ensure proper slope and sealing.
- Termostat installation: Install a compatible thermostat in a suitable location, away from drafts and direct heat sources, to control the heater's operation.
- Lækagetest: After all connections are made, perform a thorough leak test on the gas lines.
- Indledende opstart: Follow the initial startup procedure outlined in the comprehensive installation manual to purge air from the gas lines and verify proper ignition and operation.

Figur 2: Vinklet 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.
Betjeningsvejledning
Once properly installed and connected, operating your Modine Hot Dawg heater is straightforward.
Normal drift:
- Tænd: Ensure the electrical power switch to the heater is in the "ON" position.
- Termostatindstilling: 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.
- Opvarmningscyklus: 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.
- Varmekapacitet: This unit provides 100,000 BTU/H of output, capable of heating approximately 3136 square feet.
Shutting Down the Heater:
- Midlertidig nedlukning: Lower the thermostat setting below the current room temperature. The heater will cease operation.
- Udvidet nedlukning: For extended periods of non-use, turn off the electrical power switch to the heater and close the manual gas shut-off valve.
Opretholdelse
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.
- Brænderinspektion: 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.
- Elektriske forbindelser: Inspect all wiring and connections for tightness and signs of wear.
User Maintenance (Monthly/Seasonally):
- Rent ydre: Tør enhedens ydre af med adamp klud til at fjerne støv og snavs.
- Ryd forhindringer: 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.
Fejlfinding
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.
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Varmeapparatet tænder ikke. | No electrical power; Thermostat set too low; Gas supply off; Pilot light out (if applicable); Safety lockout. | Check circuit breaker/fuse; Raise thermostat setting; Ensure gas valve is open; Consult manual for pilot relight procedure; Reset heater by cycling power. |
| Heater cycles on and off frequently (short cycling). | Oversized unit for the space; Restricted airflow; Thermostat location issue. | Ensure vents are clear; Relocate thermostat away from drafts or heat sources; Consult technician for sizing assessment. |
| No heat, but fan runs. | Ignition failure; Gas supply issue; Flame sensor dirty/faulty. | Check gas supply; Clean flame sensor; Contact technician for ignition system diagnosis. |
| Unusual noises from unit. | Loose components; Fan motor issue; Dirty fan blades. | Inspect for loose panels; Clean fan blades; Contact technician for motor inspection. |
Specifikationer
The following table details the key specifications for the Modine Hot Dawg Gas Fired Unit Heater, Model HD125AS111FBAN.
| Feature | Detalje |
|---|---|
| Mærke | Modine |
| Modelnummer | HD125AS111FBAN |
| Input (BTU/H) | 125,000 |
| Output (BTU/H) | 100,000 |
| Brændstoftype | Naturgas |
| Ampslette | 2.2 Amps |
| Farve | Grå |
| Formfaktor | Kabinet |
| Produktmål (D x B x H) | 35.5 cm x 31 cm x 21.5 cm |
| Varens vægt | 125 pund |
| Monteringstype | Gulvmontering |
| Varmedækning | 3136 kvadratmeter |
| Anbefalede anvendelser | Office, Garage, Home |
| Tilslutningstype | 1/2 inch (Gas) |
Garanti og 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 webwebsted. Garantivilkår og -betingelser kan variere.
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.





