Bunn CDS-2 User Manual
®
POWDER
BUNN
™
AUTO FILL
For CDS-2 & 3
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
29793.0000C 08/02 ©1999 Bunn-O-Matic Corporation
www.bunnomatic.com
INTRODUCTION
This equipment supplies a liquid mix to the hoppers on the CDS-2 or 3 dispensers. It is for indoor use only on
a sturdy counter or shelf.
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) All equipment other than as specified below: 2 years parts and 1 year labor.
2) Electronic circuit and/or control boards: parts and labor for 3 years.
3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.
4) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years
or 30,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially
free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period.
This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment,
has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or
casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by
telephone at (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping
the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the
defective equipment is under warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make modifications to this warranty or to
make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not
constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the
equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor
warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service
Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT,
WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION AS SPECIFIED HEREIN, TO
REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of
equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any
other special, incidental or consequential damages.
INITIAL SET-UP
1. Locate the hopper elbow with slide gate, whipping chamber with dispense tip, and mixing chamber located in
the Powder Auto-Fill hopper.
2. Assemble the hopper elbow with slide gate to the hopper.
3. Assemble the whipping chamber with dispense tip to the whipper receptacle on the Powder Auto-Fill.
4. Assemble the mixing chamber to the whipping chamber and water inlet on the Powder Auto-Fill.
5. Locate the door assembly and door mounting hardware taped to the back of the door assembly.
6. Remove the door mounting hardware from the bag and set it aside
7. Carefully lift the door and locate the lamp cord connector.
8. Connect the door lamp cord connector to the receptacle located on the top of the Powder Auto-Fill.
9. Carefully rotate the support arms on the back of the door so they are roughly perpendicular to the rear of the
door.
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10. Slowly feed the door support arms through the slots located on the front of the Powder Auto-Fill.
11. Continue to slowly feed the door support arms through the slots until the magnet strikes on the back of the
door engage the magnets on the Powder Auto-Fill.
12. Locate the #8-32 x .375" truss head screws and brass spacers set aside earlier.
13. Place one brass spacer on each screw.
14. Insert one screw/spacer assembly through the door hinge, locating the spacer inside the hinge bushing and
threading the screw into the hinge mount on the Powder Auto-Fill cover. Repeat for other side.
15. Install PAF level probe (BOM #29728.1000) by sliding it into the notched area at the top rear of the CDS hopper.
The probe should be firmly seated in the notch and touching the contact pin protruding from the front of the
CDS cooling drum mount.
NOTE: At this point, it is important that the CDS machine is fully assembled according to the instructions outlined
in the CDS Operating and Service Manual.
16. Place the assembled Powder Auto-Fill on top of a hopper of a fully assembled CDS machine, taking care to align
the Powder Auto-Fill guide rails over the rollers on the CDS.
17. Connect the Powder Auto-Fill power cord to the outlet located on the CDS auger motor cover.
18. 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.
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protection.
All notices are to be kept in good condition. Replace any unreadable or damaged labels.
00656.0000
00986.0000
Push back until fully latched
before removing or manually
filling chilled product hopper.
34561.0000
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OPERATING INSTRUCTIONS
1. On the CDS control panel, make the following
switch settings:
a) POWER- "ON"
b) DAY/NIGHT- "DAY"
2. Pull the Powder Auto-Fill fully forward on its support rails and open the door.
3. Fill the Powder Auto-Fill product hopper as follows:
a) Pull the slide gate closed on the Powder Auto-Fill
product hopper elbow and remove the hopper from
the Powder Auto-Fill.
b) Remove the lid from the product hopper and fill
the hopper with a powdered granita mix.
c) Install the product hopper into the Powder AutoFill. Insure hopper is fully seated behind retainer
plates.
d) Push the slide gate on the hopper ejector elbow
to the open position.
4. Place the ON/OFF switch at the Powder Auto-Fill
whipper panel to "ON".
5. After allowing 5 seconds for the Powder Auto-Fill to
initialize, observe the door lamp. The door lamp
should not be lit. If the door lamp is lit, consult the
fault list located on the decal placed on the back of
the door. Clear the fault before proceeding.
NOTE: If the Powder Auto-Fill is being used for the first
time with the selected granita mix, perform an adjustment as described in ADJUSTMENTS.
6. Close the Powder Auto-Fill door and observe the
following:
a) The door lamp lights steadily.
b) The Powder Auto-Fill begins dispensing liquid
granita product.
7. The Powder Auto-Fill will continue to fill the CDS
product hopper until the liquid level in the CDS
hopper reaches the product level probe or for 5
minutes, which ever occurs first.
8. If the Powder Auto-Fill fails to fill the CDS hopper in
5 minutes, the following will occur:
a) The Powder Auto-Fill will stop dispensing product.
b) The door lamp will flash 4 times about every 2
seconds.
9. After checking the CDS and Powder Auto-Fill setup, the 5 minute refill fault may be cleared by simply
opening and closing the Powder Auto-Fill door.
10. Once the product level in the CDS covers the auger,
make the following switch settings at the CDS
control panel:
a) AUGER - "1".
b) ICE/OFF/NO ICE - "ICE" or "NO ICE" as appropriate
for the granita product.
11. From this point onward, the Powder Auto-Fill will
continue to automatically refill the CDS hopper,
maintaining the CDS product at an approximate 2
gallon level.
12. When the Powder Auto-Fill powder level falls low,
the door lamp will cycle ON and OFF, but will
continue to dispense product for a preset period.
When this period expires, the Powder Auto-Fill will
continue to cycle the door lamp ON and OFF and will
stop dispensing product.
13. To clear the low product fault, simply refill the
powder as follows:
a) Open the Powder Auto-Fill door.
b) Close the hopper slide gate.
c) Remove the product hopper.
d) Refill the product hopper with powdered granita
mix.
e) Replace the hopper.
f) Push the slide gate on the hopper ejector elbow
to the OPEN position.
g) Close the Powder Auto-Fill door.
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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 powdered 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 follows:
i) Pull the slide gate closed on the Powder AutoFill 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 approximately 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 powdered 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 increase 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 measuring 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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CLEANING
RECOMMENDED DAILY CLEANING AND MAINTENANCE TIPS
This should be done in conjunction with the recommended weekly cleaning of your CDS-2 or CDS-3 machine.
Removing and cleaning the whipper chamber
(once a day):
1. Open the cabinet door.
2. Pull the mixing chamber out of the whipper chamber.
3. Twist the whipper chamber clockwise and pull it off
the whipper chamber receptacle.
4. Pull the frother off the motor shaft. Notice the flat
keyway on the shaft and the matching keyway
inside the frother. It is important that these two
keyways are lined up when reassembling.
5. Twist the whipper chamber receptacle clockwise
and pull it off the motor shaft.
6. Slip the O-ring off the whipper chamber receptacle.
7. Wash components in a mild solution of dish detergent using a bristle brush.
8. Rinse thoroughly and allow to dry before reinstalling in the machine.
Whipper Chamber
Receptacle
O-ring
Frother
Mixing Chamber
Dispense Tip
Whipper Chamber
Thorough cleaning of the hopper
Wiper Blade
Shaft
Wiper Blade
Wiper Drive Gear
(once a week):
1. Open the cabinet door.
2. Remove the hopper/base assembly from the cabinet, remove the cover and empty the contents.
Retaining
Clip
3. Pull the ejector elbow off the hopper base; remove
the slide gate from the ejector elbow.
4. Remove the wiper blade and drive gear by removing
the retaining ring from the wiper blade shaft.
5. Remove the auger by pulling it out of the front
hopper base.
6. Remove the auger drive shaft by removing the
retaining clip from the auger drive shaft.
7. Wash components in a mild solution of dish detergent using a bristle brush when needed.
8. Rinse and dry each item thoroughly before reassembling.
Auger Drive
Bracket
Retaining
Ring
Hopper Base
Auger Drive
Shaft
Auger
Ejector Elbow
Slide Gate
NOTICE
The cleaning instructions noted above are for nondairy sugar based food products. When dispensing any other
food product, the cleaning cycle for the whipping chamber assembly and ejector elbow must be performed daily.
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FAULT LIST
Door Lamp Fault
ON Normal operation - Powder Auto-Fill ready to
dispense
Flashes ON/OFF at 50% duty cycle Low product level in Powder Auto-Fill hopper
Two flashes about every 2 seconds CDS/Powder Auto-Fill probe circuit open
Three flashes about every 2 seconds Powder Auto-Fill hopper not in place
Four flashes about every 2 seconds CDS refill exceeded 5 minutes
OFF Door not closed
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29793 061599
TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Department.
• Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.
• All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of
terminals or the application of external voltages may result in board failure.
• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an
intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help
to avoid twists and kinks in the tubing.
• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
• Keep away from combustibles.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
PROBLEM
CDS and Powder Auto-Fill do not
run - Main power indicator on CDS
drawer front OFF
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp is OFF
PROBABLE CAUSE
1. CDS power cord disconnected or
main power switch in 0 position.
1. The CDS DAY/NIGHT switch in the
NIGHT position.
2. The CDS DAY/NIGHT timer in the
NIGHT position.
3. Powder Auto-Fill power cord disconnected.
4. Powder Auto-Fill main power
switch in OFF position.
5. Powder Auto-Fill door is open.
REMEDY
Check that the power cord is connected to proper electrical source
and that the CDS main power switch
is in the 1 position.
1. The CDS DAY/NIGHT switch
should be in the DAY position.
2. Reprogram the CDS DAY/NIGHT
timer.
3. Check that the Powder Auto-Fill is
plugged into the back of the CDS
auger motor cover.
4. Select the ON position of the main
power switch.
5. The Powder Auto-Fill door should
be closed securely.
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp flashes ON and
OFF
1. Low product in Powder Auto-Fill.
8
Remove hopper and fill with powdered mix.
29793 061599
TROUBLESHOOTING (cont.)
PROBABLE CAUSE REMEDYPROBLEM
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp flashes two times
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp flashes three
times
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp flashes four times
1. Powder Auto-Fill not pulled completely forward.
2. CDS level probe misaligned.
1. Powder Auto-Fill hopper not installed.
2. Powder Auto-Fill hopper not installed properly.
1. Refill time exceeded five minutes.
1. Check that the Powder Auto-Fill is
pulled completely forward until the
guide rails roll into the indented position.
2. Position the CDS level probe so
that it is located in the notch of the
CDS hopper and touching the contact protruding from the front of the
CDS cooling drum mount.
1. Install the Powder Auto-Fill hopper.
2. Reposition the Powder Auto-Fill
hopper.
Check that the SERVICE switch is
released or reset by opening and
closing the Powder Auto-Fill door.
The CDS product tastes "watery" or
"sugary"
Powder Auto-Fill dispenses dry prod-
uct only - dry powder build-up in
mixing and whipper chambers
1. Improper adjustment of product
mix ratio.
1. Powder Auto-Fill not connected to
water source.
2. Water source turned off.
3. Water line obstructed.
Adjust the product mix ratio per instructions in Powder Auto-Fill Adjustment. See page 5.
1. Connect the Powder Auto-Fill to a
20 to 90 psi (138 to 620 kPa)water
source.
2. Turn water source on.
3. Remove obstruction.
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29793 011500
TROUBLESHOOTING (cont.)
PROBABLE CAUSE REMEDYPROBLEM
Powder Auto-Fill will not dispense
product
1. No water
2. No power or incorrect voltage to
the dispenser.
3. Dispense Solenoid Valve
4. Control Board and Probe
5. Auger Drive
6. Transformer
Water lines and valves to the dispenser must be open and free of
obstructions.
Check that the power cord is connected to the CDS dispenser and for
voltage from the CDS dispenser.
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
Refer to Service- Auger Drive for
testing procedures. See page 13
Refer to Service- Transformer for
testing procedures. See page 26
Dripping from dispense tip
Water flows continuously
7. Water Strainer (Optional)
1. Dispense Solenoid Valve
1. Control Board and Probe
2. Dispense Solenoid Valve
A) Direction of flow arrow must be
pointing towards dispenser.
B) Remove the strainer and check
for obstructions. Clear or replace.
Remove dispense valve and clear
any obstructions. Rebuild or replace
the valve if necessary. Seepage 32
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
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29793 061599
TROUBLESHOOTING (cont.)
PROBABLE CAUSE REMEDYPROBLEM
Product overflows CDS hopper
Weak product
1. Control Board and Probe
2. Dispense Solenoid Valve
1. Whipper Motor
2. Frother
3. Dispense Solenoid Valve
4. Auger Drive
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
Refer to Service- Whipper Motor for
testing procedures. See page 16
Refer to Service- Frother for testing
procedures. See page 15
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
Refer to Service- Auger Drive for
testing procedures. See page 13
Dispenser is making unusual noises
5. Auger Spring
6. Auger Motor
7. Improper adjustment of product
mix ratio
1. Plumbing lines
2. Water supply
Refer to Service- Auger Spring for
testing procedures. See page 13
Refer to Service- Auger Motor for
testing procedures. See page 14
Set the product mix ratio per Adjustments. See page 5
Plumbing lines should not be resting on the counter top.
A) The dispenser must be connected
to a cold water line.
B) Water pressure to the dispenser
must not exceed 90 psi (620 kPa).
Install a regulator if necessary to
lower the working pressure to approximately 50 psi (345 kPa).
Display not lit
1. Lamp
2. Lamp Holder
11
Refer to Service- Lamp for testing
procedures. See page 25
Refer to Service- Lamp Holder for
testing procedures. See page 25
29793 011500
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