Introduction
Thank you for choosing the BUNN Axiom 15-3 Automatic Commercial 12-Cup Coffee Maker. This robust and efficient machine is designed for high-volume environments, providing consistent, high-quality coffee. Its large 200 oz. (5.9 liters) tank ensures back-to-back brewing capacity, making it ideal for offices, break rooms, and other commercial settings. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your coffee maker.
Figure 1: BUNN Axiom 15-3 Commercial Coffee Maker with three glass carafes on warmers.
Safety Information
Please read all safety instructions carefully before operating the appliance. Failure to do so may result in injury or damage.
- Electrical Safety: Ensure the coffee maker is connected to a properly grounded electrical outlet with the correct voltage (120 Volts). Do not operate with a damaged cord or plug.
- Hot Surfaces: The brewing area, warmer plates, and hot water faucet become extremely hot during operation and remain hot for some time after use. Avoid direct contact. Use caution when handling carafes and funnels. The SplashGard funnel is designed to deflect hot liquids away from the hand.
- Water Connection: This unit is designed to be plumbed directly into a water line. Ensure all water connections are secure and leak-free before operation.
- Supervision: Do not leave the appliance unattended during operation.
- Cleaning: Always disconnect power before cleaning. Allow the unit to cool completely before cleaning.
- Intended Use: Use this appliance only for its intended purpose of brewing coffee and dispensing hot water.
Setup
Proper installation is crucial for optimal performance and safety.
- Unpacking: Carefully remove the coffee maker from its packaging. Inspect for any shipping damage.
- Placement: Place the unit on a stable, level surface. Ensure adequate clearance around the unit for ventilation and access.
- Water Line Connection: This model requires a direct plumbing connection to a cold water supply. Consult a qualified plumber for proper installation of the water line to the unit's inlet. Ensure the water pressure is within the recommended range for commercial coffee makers.
- Electrical Connection: Plug the coffee maker into a dedicated 120 Volt grounded electrical outlet.
- Initial Rinse: Before first use, perform an initial rinse cycle without coffee to flush out any manufacturing residues.
- Place an empty carafe on the brew station.
- Ensure the brew funnel is empty and properly seated.
- Initiate a brew cycle (refer to the Operating section).
- Discard the hot water from the carafe. Repeat this process 2-3 times.
Figure 2: Side view showing the power cord and general dimensions for placement.
Figure 3: Technical diagram with detailed dimensions for installation planning.
Operating Instructions
The BUNN Axiom 15-3 is designed for user-friendly operation.
Brewing Coffee
- Prepare Brew Funnel: Insert a paper filter into the brew funnel. Add the desired amount of ground coffee to the filter.
- Place Carafe: Position an empty coffee carafe (sold separately) on the designated warmer plate beneath the brew funnel.
- Initiate Brew: Ensure the unit displays "READY TO BREW" and the water temperature is optimal (e.g., 200°F). Press the BREW button on the control panel. The machine will automatically draw water and begin the brewing process.
- Monitor Brewing: Brewing typically takes approximately 3 minutes per pot. The unit features pre-infusion and pulse brew for optimal coffee extraction.
- Warmer Operation: The unit has three lower warmers to keep brewed coffee hot. Use the FRONT and REAR buttons on the control panel to activate or deactivate the warmers as needed. An energy-saver mode is available to reduce tank temperature during idle periods.
Hot Water Dispensing
For instant hot water for tea or other beverages:
- Place a cup or container under the hot water faucet.
- Press the PUSH button on the hot water dispenser to release hot water. Release the button to stop the flow.
Figure 4: Detail of a warmer plate, designed to keep coffee at optimal serving temperature.
Maintenance
Regular cleaning and maintenance will extend the life of your coffee maker and ensure consistent coffee quality.
Daily Cleaning
- Exterior: Wipe down the exterior surfaces with a damp cloth. Do not use abrasive cleaners.
- Brew Funnel: Remove and wash the brew funnel and sprayhead (if removable) with warm, soapy water. Rinse thoroughly.
- Carafes: Wash carafes with warm, soapy water after each use.
Descaling (Monthly or as Needed)
Mineral deposits from water can build up over time, affecting performance. Descale regularly, especially in hard water areas.
- Turn off and unplug the coffee maker. Allow it to cool completely.
- Consult the BUNN descaling solution instructions or use a mixture of white vinegar and water (e.g., 1 part vinegar to 2 parts water).
- Pour the descaling solution into the water tank (via the top opening).
- Place an empty carafe under the brew funnel.
- Plug in the unit and initiate a brew cycle. Allow the solution to run through.
- After the cycle, let the unit sit for 15-30 minutes.
- Run several cycles of fresh, clean water through the machine to thoroughly rinse out any descaling solution.
Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Coffee does not brew. | No power; water supply off; unit not ready. | Check power connection; ensure water supply valve is open; wait for "READY TO BREW" message. |
| Coffee is not hot enough. | Warmer not activated; mineral buildup. | Ensure warmers are on; descale the unit. |
| Slow brewing. | Mineral buildup; clogged sprayhead. | Descale the unit; clean or replace sprayhead. |
| Water leaks from unit. | Loose water line connection; internal component issue. | Check water line connections; contact qualified service personnel. |
If problems persist after attempting these solutions, please contact BUNN customer support or a qualified service technician.
Specifications
| Feature | Detail |
|---|---|
| Brand | BUNN |
| Model Name | Axiom15-3, 3L |
| Item Model Number | 38700.0002 |
| Color | Black/SST |
| Product Dimensions (D x W x H) | 22.1"D x 16.3"W x 16.8"H |
| Special Feature | Plumbed into water line |
| Coffee Maker Type | Drip Coffee Machine |
| Filter Type | Paper |
| Operation Mode | Fully Automatic |
| Voltage | 120 Volts |
| Coffee Input Type | Ground Coffee |
| Included Components | Funnel (Decanters not included) |
| Item Weight | 31 pounds |
| Country of Origin | USA |
| Human Interface Input | Buttons and Digital Display |
Warranty and Support
For specific warranty details and technical support, please contact the manufacturer, BUNN, directly. Warranty terms typically cover defects in materials and workmanship for a specified period from the date of purchase. Keep your proof of purchase for warranty claims.
Manufacturer: EMG East, Inc. (direct order)
Please note that third-party protection plans may be available but are separate from the manufacturer's warranty.
Additional Resources
No official seller videos are available for this product. For further assistance, please refer to the official BUNN website or contact their customer service.
