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HOPPER DISPENSE RATE OF PRODUCT
The hopper dispense rates are preset at the factory. With 22 tooth gear and auger wire, the preset dispense
rate is approximately 3 to 5 grams per second. With 30 tooth gear and auger wire, the preset dispense rate is
approximately 5 to 7 grams per second. The hopper dispense rates can be individually programmed to a range
of dispense rates from approximately 1.5 to 12 grams per second, by following the procedures described in
Programming Modes.
HOPPER LEVEL SENSOR CALIBRATION
The dispenser is equipped with sensors to detect a low level in each hopper. When low powder lockout is
enabled, dispensing will be disabled when a low powder condition is detected in a hopper. The LCD screen on
the door will also display a low level condition.
The despenser is shipped from the factory with the low level powder lock disabled. To enable the lock, place
the “NORMAL/PROGRAM/RINSE” switch (page 9) in the “PROGRAM” position. Press button A (page 8) below
the BUNN logo on the front of the door. Continue to press this button until the “LOCKS/DISABLES?” menu is
reached. Press button B (page 8} for “YES”, then press it again in the “LOW POWDER LOCK?” menu. The low
powder lockout is now enabled. Press button C (page 8) to exit the program menus, then return the “NORMAL/
PROGRAM/RINSE” button to the “NORMAL” position. To disable the low powder lockout, repeat the process,
and press button D (page 8) for “NO”, in the “LOW POWDER LOCK” menu.
The low level sensors are factory calibrated for most products. If calibration is required for proper opera-
tion, the sensors can be recalibrated to the current product.
The hopper must be at least half full of product for calibration. Place the “NORMAL/PROGRAM/RINSE”
switch in the “PROGRAM” position. Using button A (page 8), forward until the “CALIBRATION?” menu is
reached. Press button B (page 8) for “YES”, then press button A (page 8) until “CAL HOPPER 1?” screen is
reached. Continue to press button A until the hopper to be calibrated is reached.
To calibrate the hopper, press button B (page 8) to indicate “YES” in the “CAL HOPPER#? screen. The screen
will then ask you if the hopper is full. Press the button again to indicate “YES”. The calibration will then take
a few moments, then the screen will display “POWDER LEVEL RESET COMPLETE”. The next hopper may be
calibrated by moving forward in the menu, or press button C (page 8) to exit.
CLEANING
Refer to the decal inside the hopper access door for cleaning recommendations and procedures.
The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all sur-
faces on Bunn-O-Matic equipment.
DRAINING THE hot water tank
CAUTION - The dispenser must be disconnected from the power source throughout these steps
1. Disconnect the dispenser from the power source.
2. Open front door and place ON/OFF/NIGHT switch in the “OFF” (center) position and let the water in the tank
cool before draining.
3. Shut off and disconnect the incoming water supply.
4. Remove the drip tray and access panels below the door.
5. Pull the clamped end of the silicone tube out of the dispenser and direct it into a drain or a container large
enough to hold the volume of water in the tank (7.3 gal for iMIX-4/5 and 4.4 gal for iMIX-3).
6. Make certain the shut off clamp is locked tightly on the tube, then remove the snap type clamp and plug from
end of tube.
7. Carefully release the shut off clamp to let the water drain from the tank.
NOTE - The dispenser must be refi lled using the INITIAL FILL & HEAT steps before reconnecting to the power
source.
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