BUNN GRX-BD 10-Cup High Altitude Coffee Brewer User Manual

Introduction

This manual provides comprehensive instructions for the safe and efficient operation, maintenance, and troubleshooting of your BUNN GRX-BD 10-Cup High Altitude Coffee Brewer. Designed for optimal performance in high-altitude environments, this brewer features BUNN's Speed Brew technology, capable of brewing 10 cups of coffee in approximately 4 minutes. It utilizes a stainless steel commercial-grade hot water tank to ensure coffee is brewed on demand and includes a unique spray head for optimal coffee extraction and flavor.

Please read this manual thoroughly before using the appliance and retain it for future reference.

Important Safety Information

When using electrical appliances, basic safety precautions should always be followed to reduce the risk of fire, electric shock, and/or injury to persons, including the following:

• Read all instructions.
• WARNING: This appliance is designed for 220 volts AC electrical supply. Ensure your power outlet matches this requirement before plugging in. Connecting to an incorrect voltage can cause severe damage to the appliance and pose a safety hazard.
• Do not touch hot surfaces. Use handles or knobs.
• To protect against fire, electric shock, and injury to persons, do not immerse cord, plugs, or coffee maker in water or other liquid.
• Close supervision is necessary when any appliance is used by or near children.
• Unplug from outlet when not in use and before cleaning. Allow to cool before putting on or taking off parts, and before cleaning the appliance.
• Do not operate any appliance with a damaged cord or plug or after the appliance malfunctions, or has been dropped or damaged in any manner. Return appliance to the nearest authorized service facility for examination, repair, or adjustment.
• The use of accessory attachments not recommended by the appliance manufacturer may result in fire, electric shock, or injury to persons.
• Do not use outdoors.
• Do not let cord hang over edge of table or counter, or touch hot surfaces.
• Do not place on or near a hot gas or electric burner, or in a heated oven.
• Always attach plug to appliance first, then plug cord into the wall outlet. To disconnect, turn any control to "off", then remove plug from wall outlet.
• Do not use appliance for other than intended use.

Package Contents

Upon opening the package, verify that all components are present and undamaged. The standard package for your BUNN GRX-BD coffee brewer should include:

• BUNN GRX-BD Coffee Brewer Unit
• Glass Carafe (10-cup capacity)
• Filter Basket
• Starter Pack of BUNN Coffee Filters (#6 size)

Image: Components of the BUNN GRX-BD coffee brewer, showing the main unit, glass carafe, filter basket, and a stack of #6 coffee filters.

Setup

1. Initial Cleaning: Before first use, wash the glass carafe and filter basket in warm, soapy water. Rinse thoroughly and dry. Wipe the exterior of the brewer with a damp cloth.
2. Placement: Place the coffee brewer on a flat, stable, heat-resistant surface near a 220V AC electrical outlet. Ensure there is adequate clearance above the brewer for steam to escape and for easy access to the water reservoir.
3. Fill Water Tank: Open the lid of the brewer and pour 10 cups (50 oz) of fresh, cold water into the water reservoir. Close the lid. The internal hot water tank will begin to heat the water. This process may take approximately 15-20 minutes for the first heating cycle.
4. First Brew Cycle (Priming):
   • Place the empty filter basket into its position.
   • Place the empty glass carafe on the warmer plate.
   • Ensure the brewer is plugged into a 220V AC outlet.
   • Press the "ON" switch. The brewer will begin a cycle, dispensing hot water into the carafe. This primes the system and cleans any manufacturing residues.
   • Once the cycle is complete, discard the hot water from the carafe. Your brewer is now ready for use.

Image: Front view of the BUNN GRX-BD coffee brewer, ready for setup.

Operating Instructions

Your BUNN GRX-BD brewer keeps water hot in its internal tank, allowing for immediate brewing on demand.

1. Prepare Filter Basket: Place a #6 size BUNN coffee filter into the filter basket.
2. Add Coffee Grounds: Add your desired amount of ground coffee into the filter. For best results, use medium-grind coffee. Refer to coffee packaging for recommended measurements, typically 1-2 tablespoons per cup.
3. Position Carafe: Place the empty glass carafe on the warmer plate beneath the filter basket.
4. Add Water: Open the lid of the brewer and pour fresh, cold water into the water reservoir. The amount of water added will determine the amount of coffee brewed (e.g., 10 cups of water for a full pot, or 20 oz for a large travel mug). The hot water tank will automatically replenish with the new cold water.
5. Brewing: Close the lid. The brewing cycle will begin almost immediately as the hot water from the tank is displaced by the fresh cold water. Coffee will begin to flow into the carafe. A full 10-cup pot typically brews in about 4 minutes.
6. Serving: Once brewing is complete, remove the carafe to serve. The warmer plate will keep the coffee hot.
7. Power and Warmer: The brewer has an "ON/OFF" switch for the main power and a separate "WARMER" switch to control the warmer plate. Ensure the "ON" switch is engaged for brewing. Use the "WARMER" switch to keep coffee hot after brewing.

Maintenance and Cleaning

Regular cleaning and maintenance will ensure the longevity and optimal performance of your BUNN coffee brewer.

• Daily Cleaning:
  • After each use, discard used coffee grounds and filter.
  • Wash the glass carafe and filter basket in warm, soapy water. Rinse thoroughly and dry. These parts are typically top-rack dishwasher safe, but hand washing is recommended for best care.
  • Wipe the exterior of the brewer with a damp cloth. Do not use abrasive cleaners or scouring pads.
• Descaling (Mineral Deposit Removal):

  Over time, mineral deposits (limescale) can build up inside the hot water tank, affecting performance. Descale your brewer every 3-6 months, or more frequently if you have hard water.

  1. Unplug the brewer and allow it to cool completely.
  2. Remove the spray head by twisting it counter-clockwise. Clean any mineral deposits from the spray head holes using a small brush or paper clip.
  3. Pour 2 cups of white vinegar into the water reservoir.
  4. Place an empty carafe on the warmer plate.
  5. Plug in the brewer and turn it on. Allow the vinegar solution to brew through.
  6. After the cycle, unplug the brewer and let it sit for 30 minutes.
  7. Repeat the brewing process with several full carafes of fresh, cold water to rinse the system thoroughly.
  8. Reattach the spray head.

Troubleshooting

Specifications

• Brand: BUNN
• Model Name: GRX-BD (also known as GRB)
• Type: Drip Coffee Machine
• Color: Black
• Capacity: 10 Cups (50 oz)
• Power Supply: 220 Volts AC
• Special Features: Speed Brew, Automatic, High Altitude Optimized
• Filter Size: #6
• Dimensions (approx.): 16 x 20 x 15 inches (Height x Width x Depth)
• Item Weight: 8 pounds
• Manufacturer: BUNN-O-MATIC

Warranty and Support

For information regarding the warranty coverage for your BUNN GRX-BD coffee brewer, please refer to the warranty card included with your product packaging or visit the official BUNN website. Warranty terms and conditions may vary.

If you require technical assistance, replacement parts, or have questions not covered in this manual, please contact BUNN Customer Service. Contact information can typically be found on the BUNN website or on your product registration materials.

Manufacturer: BUNN-O-MATIC

Website: www.bunn.com (Please note: This is a general link and may not lead directly to support for this specific model. Refer to product documentation for precise support channels.)