Bunn POWDER AUTO FILL - Manual (Page 5)

5
ADJUSTMENTS
When using the Powder Auto-Fill with a new powdered granita mix, follow the procedure outlined below to
adjust the Powder Auto-Fill to produce the correct recipe.
1. Determine the mix ratio of powdered granita mix.
Convert the recipe so that it is expressed in terms
of weight units [grams (g), dry ounces (oz), or
pounds (lbs)] of powdered granita mix to fluid
ounces (fl.oz.) of water [1 gallon (gal) = 128 fl.oz.;
1 liter (l) = 33.8 fl.oz.].
2. The delivery rate of the water ingredient is factory
preset to 1 fl.oz. per second. Therefore, it is only
necessary to adjust the delivery rate of the pow-
dered granita mix. Adjustment is accomplished as
follows:
a) Place the Powder Auto-Fill on top of a fully
assembled CDS taking care to align the Powder
Auto-Fill guide rails over the rollers on the CDS
guide rails.
b) Connect the Powder Auto-Fill power cord to the
outlet located on the CDS auger motor cover.
c) Attach a flexible water line to the .25" flare fitting
on the back panel of the Powder Auto-Fill.
NOTE: A water strainer assembly (BUNN-O-MATIC
#23820.1000) should be installed in line prior to the
flexible water line.
d) On the CDS control panel, make the following
switch settings:
i) POWER- "ON"
ii) DAY/NIGHT- "DAY"
e) Pull the Powder Auto-Fill fully forward on its
support rails
f) Fill the Powder Auto-Fill product hopper as fol-
lows:
i) Pull the slide gate closed on the Powder Auto-
Fill product hopper elbow and remove the product
hopper from the Powder Auto-Fill.
ii) Remove the lid from the product hopper and
fill the hopper with a powdered granita mix.
iii) Install the product hopper into the Powder
Auto-Fill.
g) Place the ON/OFF switch at the Powder Auto-Fill
whipper panel to "ON".
h) After allowing 5 seconds for the Powder Auto-Fill
to initialize, observe the door lamp on the whipper
panel. The door lamp should not be lit. If the door
lamp is lit, consult the fault list and clear the fault
before proceeding.
i) Remove the hole plug on the whipper panel.
Using a screwdriver, set potentiometer to approxi-
mately mid range.
j) Remove the mixing chamber from the Powder
Auto-Fill and place a small container, such as a cup,
under the product hopper ejector elbow.
k) Push the slide gate on the product hopper ejector
elbow to the OPEN position.
l) Momentarily set the TEST/SERVICE switch on the
whipper panel to the TEST position.
m) The hopper motor will run and dispense pow-
dered granita mix for 10 seconds.
n) After the Powder Auto-Fill has finished the 10
second throw test, weigh the dispensed product.
o) Determine the dispense rate of the powdered
product (weight units per second) by dividing the
measured weight by 10.
p) Compare the measured dispense rate with the
mix ratio in step 1.
q) Adjust the MIN/MAX control clockwise to in-
crease the dispense rate or counterclockwise to
decrease the dispense rate of the powdered granita
mix.
r) Repeat steps l through q as necessary until
proper mix ratio is achieved.
s) Replace the mixing chamber removed in step j.
Replace hole plug.
3. Once the mix ratio has been adjusted, the Powder
Auto-Fill can be run with the door open to allow the
user to catch dispensed product for brix testing as
follows:
a) Hold a container under the dispense tip of the
Powder Auto-Fill.
b) Hold the TEST/SERVICE switch on the whipper
panel to the SERVICE position.
c) When the container is filled to the desired level,
release the TEST/SERVICE switch.
d) Measure the brix using the appropriate measur-
ing device.
e) Remove the hole plug. Using a screwdriver,
adjust the potentiometer clockwise to increase the
brix or counterclockwise to decrease the brix of the
product. Replace the hole plug.
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