The J.E. Adams Industries Model 9420-1G-DIG is a commercial-grade digital air and vacuum unit designed for use in gasoline-dispensing and service stations. This robust appliance combines the functionality of an air compressor and a vacuum cleaner, providing convenient services for customers.
Function Description
The primary function of the Model 9420-1G-DIG is to offer both tire inflation and vehicle interior vacuuming services. The unit is equipped with a digital control panel that allows for programming of various settings, including pricing and duration of service. It operates on a 110V, 60Hz electrical supply and requires a 20 amp service.
For tire inflation, the unit features an air compressor with a 3/4HP Twin Cylinder motor. Users can set a desired tire pressure, and the unit will inflate tires accordingly. The display shows the pressure unit, which can be set to PSI or BAR, with a factory default of 32 PSI and a maximum pressure value typically set to 70 PSI. The air hose assembly is 1/4" x 25' long and includes an open flow chuck for easy connection to tire valves.
The vacuum function is powered by two 110V motors, providing strong suction for cleaning vehicle interiors. The vacuum hose is 2" x 15' long and comes with a claw/cuff assembly for effective debris collection. The unit is designed to collect dry debris only; it should not be used on wet surfaces.
The unit incorporates a payment system, typically featuring a manual Imonex coin mechanism and a Mars 110V bill validator. The programmed price determines the duration of service for both air and vacuum functions, as they are not priced or timed separately. The digital control panel allows for flexible programming of the number of coins required to activate the machine and the duration of service per coin. For instance, if set to 80 seconds per coin, a $0.75 payment (three quarters) would provide 240 seconds (4 minutes) of running time. The unit can also be set to "free vend" mode, where no payment is required.
Safety is a critical aspect of the device's design. The manual emphasizes that the unit should be installed at least 20 feet (6 meters) horizontally from any dispensing pump and at least 18 inches (450 mm) above a driveway or ground level to prevent arcs or sparks from causing an explosion in the presence of gasoline. It also includes warnings against using the vacuum on wet surfaces, picking up flammable liquids or burning materials, and using the air compressor on tires containing sealers like "FIX-A-FLAT."
Usage Features
Operating the Model 9420-1G-DIG is straightforward. Once installed and powered, users can select their desired function (air or vacuum) using a toggle switch. Payment is then inserted via the coin or bill acceptor. The digital display guides the user through the process, showing settings like "Dur" for duration and "COnn" for compressor operation mode. The compressor can be set to "on demand" or "continuous" mode, with "continuous" being recommended for ease of use.
The unit's programming capabilities allow owners to customize the service to their specific business needs. The "Quick Programming Method" enables adjustments to the number of coins per vend and the duration of service per coin. Advanced programming offers further customization, such as setting pressure units (PSI or BAR) and default tire pressure values. A built-in counter tracks the number of coins or vends, providing valuable data for monitoring usage.
Maintenance Features
Regular maintenance is crucial for the longevity and optimal performance of the Model 9420-1G-DIG. The manual outlines several key maintenance tasks:
- Filter Bags: Filter bags should be removed and shaken out weekly. It is recommended to keep a new set on hand for monthly washing of the original bags.
- Hoses: The vacuum hose and air hose should be checked weekly for cracks and replaced if damaged.
- Canister: The canister should be cleaned with a stainless steel cleaner as needed.
- Compressor Filter: The filter from the compressor should be removed and cleaned monthly.
- Vacuum Motor Brushes: Vacuum motor brushes should be checked approximately every 3 months for excessive wear. They need to be replaced if shorter than 3/8". Crucially, power must be disconnected before performing this task.
- Lubrication: No lubrication is required for the vacuum motors or air compressor.
- Chuck Washer: If inadequate pressure is experienced, the rubber washer inside the chuck may be worn out and should be replaced with a special J.E. Adams PN 8533-13CW.
- Troubleshooting: The manual provides a troubleshooting guide for common issues such as the unit not powering on, blowing breakers, lost vacuum suction, or the compressor not running. Solutions range from checking breakers and switches to replacing motor brushes, filter bags, hoses, or gaskets.
- Professional Servicing: All servicing of the machine should be conducted by an authorized service representative to ensure proper operation and safety.
The unit's design, with its robust components and clear maintenance guidelines, aims to provide a reliable and long-lasting service solution for commercial environments.
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