Bunn Adjusting the Flow Restrictor for Optimal Dispenser Performance
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SETTING DISPENSER FLOW RATE

The dispenser comes from the factory with flow restrictors in the mix chambers. With the restrictors in place the dispense rate is about 1.8 oz./sec (53.2 ml/sec) and is used primarily for cup at a time dispensing. The flow restrictors can be removed to increase the dispense rate to about 2.5 oz./sec (74 ml/sec) for larger volume dispensing (airpots, carafes, etc.).

NOTE: The hot water FlowRate is fixed at approximately 1.7 oz/sec. and can not be adjusted.

Removing the restrictors:

1.Disconnect the dispenser from the AC power source.

2.Open the Product Cabinet door.

3.Remove the concentrate tube, vent line and grommet from mix chamber ports in side the product cabinet.

4.Remove the two screws that fasten mix chamber to the control panel.

5.Gently pull mix chamber away from dispenser to expose water line connection, (you may have to rotate it slightly).

6.Disconnect FlavorGard™ sensor wire and hot water tubing from the mix chamber.

7.Remove the flow restrictor from the inlet to the mix chamber.

8.Reconnect FlavorGard™ sensor wire and hot water tubing to the mix chamber.

9.Place mix chamber back into position in the dispenser, (you may have to rotate it slightly) and secure it with the two screws

10.Reposition the grommet, vent line and pump tubing onto the mix chamber ports.

Caution: Failure to properly replace and secure any of the above components may result leaks and/or cause damage to the dispenser.

If you changed the Dispenser Flow Rate, you will need to reprogram the dispenser to the new rate, see Programming the Dispenser.

CAUTION: Failure to reprogram the Dispenser Flow Rates will result in inaccurate Mix Ratios.

Reprogramming the Dispenser Flow Rate:

1.Remove the lower splash guard panel and locate the Programming module.

2.Use the Down Arrow key to enter into the programming function and scroll through the menu’s to the “CAL LEFT SIDE?” menu and select “YES”.

3.Scroll down to the “CAL LF WTR VOL” menu

4.Use the (+) & (-) keys to enter a volume of 50 Oz. (1478 mL). This will recalibrate the Left dispenser to the new rate.

5.Scroll down to the “CAL RT WTR VOL” menu

6.Use the (+) & (-) keys to enter a volume of 50 Oz. (1478 mL). This will recalibrate the Right dispenser to the new rate.

7.Select “Exit” to leave the programming menu.

Note: The default volume of 50 Oz (1478 mL), is the typical Cal Volume for a 2.5 Oz/sec Flow Rate Test, see Field Calibration of the Concentrate Pumps / Dispenser Flow Rates.

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34766 073007

 

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Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisBUNN-O-MATIC Commercial Product Warranty Introduction Contents40054.0000 User Notices00656.0001 37881.0000 28181.0003 11646.0002Electrical Requirements Field Wiring Terminal Block DiagramModels without Master ON/OFF Switch Models with Master ON/OFF SwitchPlumbing HOOK-UP Plumbing RequirementsInitial SET-UP Electrical HOOK-UPRemoving the restrictors Setting Dispenser Flow RateReprogramming the Dispenser Flow Rate Oz/sec 16 I.D. Tubing Selecting the Correct Pump TubingDispense Rate1513 Operating Controls and InterfaceInitial Fill & Heat Rinse Alarm Feature FlavorGard FeatureAlarm Mode Brew Temperature Lockout Feature BIB Empty Lockout FeatureExit 3/16 Programming the DispenserMenu Screen Action Description Tank Temp 351 +0oz + LF Disp VolumeRT Disp Volume Menu Screen Lock Flavor ? Exit YES Flavors LockedCabinet Temp Menu Screen Tank TempExit + Ready TempCAL Left Pump ? Pull Dispense Menu ScreenRinse Time ? 12 Hrs + Action DescriptionCAL Right Side ? Exit YES Menu Screen ActionCAL Right Pump ? Pull Dispenser CAL RT WTR Flow Pull DispenserTest Refill ? Exit YES WTR Start DelayWTR Stop Delay Test LED’S ? No Exit YES Test Switches ?Priming the Concentrate Lines Loading the ConcentrateFilling Cambros or other large containers Operating the Pull & Hold DispenserModels LCA-2 PC, LCA-2C PC, LCA-2A PC Operating the Preset Portion Control DispenserWeekly Sanitizing Cleaning & Preventative MaintenanceGeneral Cleaning and Sanitizing Procedures Daily Rinsing Daily Parts WashingReplacing the Pump Tubing Preventive MaintenanceDraining the HOT Water Tank Power LED OFF TroubleshootingFront Panel LED Display Messages Empty BIB Warning Internal FaultLeft Refill LED on Concentrate BIB is EmptyPossible Cause Troubleshooting Dispenser Diagnostics-LCD DisplayScreen Displayed Possible Cause CHK RPM Sensor CHK Tubing Area Cooler Fault Left Pump FaultCHK Pump Wiring CHK RPM Sensor CHK Tubing Area RT Pump FaultCalibrating the Left Side Dispenser Calibrating the Right Side Dispenser Field Calibrating the Hot Water Flow RateOz/sec 53 ml/sec w/ flow restrictor Oz/sec 74 ml/sec w/o flow restrictorCalibrating The Empty BIB Threshold Field Calibrating the Empty BIB WarningVolts AC 2 Wire Schematic Wiring Diagram LCC-2A/LCA-2A/LCA-2A, PC

34766.0000S specifications

The Bunn 34766.0000S is a commercial-grade coffee maker that stands out for its efficiency and precision in brewing. Designed for high-volume environments such as restaurants, cafes, and offices, this coffee brewer is engineered to deliver a consistent and robust coffee flavor with every brew.

At the heart of the Bunn 34766.0000S is its unique brewing system, which employs a patented technology to optimize extraction. This system ensures that water is heated to the ideal temperature, usually around 200°F, for optimal flavor extraction from coffee grounds. The precise temperature control is essential in commercial settings, where the quality of coffee can significantly affect customer satisfaction.

The Bunn 34766.0000S features a stainless steel construction, which not only enhances its durability but also allows for easy cleaning and maintenance. The sleek design fits comfortably in any kitchen setting, and its compact size makes it suitable for countertops with limited space. With a 12-cup capacity, this machine is capable of producing multiple pots of coffee quickly, ensuring that demand is met during peak hours.

One of the standout features of the Bunn 34766.0000S is its Smart Brew technology. This innovative feature allows for customizable brewing settings, enabling users to adjust brew strength and flavor profiles according to their specific preferences. The machine includes a programmable timer, which can be set for automatic brewing, a significant advantage for businesses that require coffee to be ready at specific times.

Additionally, the Bunn 34766.0000S comes equipped with a built-in water tank, which keeps water at the optimal brewing temperature for instant coffee production. This feature minimizes waiting times and ensures that coffee is always fresh.

In terms of safety, the Bunn 34766.0000S is fitted with an advanced safety shut-off mechanism to prevent overheating and ensure that the machine operates within safe temperature limits. This reliability is crucial for busy establishments where operational efficiency is paramount.

In summary, the Bunn 34766.0000S is an exceptional choice for businesses looking for a dependable, high-quality coffee brewing solution. It combines innovative brewing technologies, user-friendly features, and a robust design to meet the demands of any commercial environment, making it an indispensable tool for serving delicious coffee consistently.
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