Bunn FMD-2 User Manual
FMD-2
FMD-3
(prior to S/N FMD0013000)
! WARNING
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RELEASE BUTTON WHEN CUP IS 2/3 FULL
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OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
www.bunnomatic.com
INTRODUCTION
This equipment dispenses hot beverages on demand from powdered product. It has two or three hoppers. The
two and three hopper models may also dispense cold beverages from powdered product from their left dispense
station. 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.
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.
PUSH and HOLD BUTTON UNTIL CUP IS 2/3 FULL, THEN RELEASE
FMD-2 28301.0002
PUSH and HOLD BUTTON UNTIL CUP IS 2/3 FULL, THEN RELEASE
FMD-3 28301.0000
2
28364 080202
USER NOTICES (cont.)
00656.0000
00831.0000
MECHANICAL THERMOSTAT
28368.0000
RELEASE BUTTON WHEN CUP IS 2/3 FULL
160°
-
+
TEMPERATURE
ADJUSTMENT
120VAC
190°
HEATER
26527.0002
THERMOSTAT ASSEMBLY
BUNN-O-MATIC CORP
®
ELECTRONIC THERMOSTAT
26536.0002
PLACE
CUP HERE
FMD-2
28328.00003
PLACE
CUP HERE
FMD-3
28328.0000
3
28364 071598
INITIAL SET-UP
1. Locate the drip tray assembly beneath the dispenser nested in the packing material.
2. Remove the drip tray and the drip tray cover and set them aside.
3. Remove the water strainer assembly from the drip tray and set it aside.
4. Remove the four legs from the drip tray, apply non-skid pads to the bottom of the legs and securely install
the legs in the dispenser base.
ELECTRICAL REQUIREMENTS
CAUTION - The dispenser must be disconnected from the power source until specified in
The 120 volt version of this dispenser has an attached cordset. The mating connector must be a NEMA 5-15R.
The 120/208 volt and the 120/240 version of this dispenser has an attached cordset. The mating connector must
be a NEMA 14-20R.
The 240 volt version of this dispenser has an attached cordset without plug.
Initial Set-Up.
ELECTRICAL HOOK-UP
CAUTION - Improper electrical installation will damage electronic components.
1. An electrician must provide electrical service as specified.
2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.
3. Open the front door of the dispenser and place the heater switch in the “OFF” (upper position).
4. Connect the dispenser to the power source.
5. If plumbing is to be hooked-up later be sure the dispenser is disconnected from the power source. If
plumbing has been hooked-up, the dispenser is ready for
Initial Fill & Heat.
PLUMBING REQUIREMENTS
This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 90 psi (138
and 620 kPa) from a 1⁄2" or larger supply line. A shut-off valve should be installed in the line before the dispenser.
Install a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi(345 kPa). The
water inlet fitting is 1⁄4" flare.
NOTE - Bunn-O-Matic recommends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for more than
25 feet from the 1⁄2" water supply line. At least 18 inches of an FDA approved flexible beverage tubing, such as
reinforced braided polyethylene or silicone, before the dispenser will facilitate movement to clean the countertop.
It can be purchased direct from Bunn-O-Matic (part number 00326-0000). Bunn-O-Matic does not recommend
the use of a saddle valve to install the dispenser. The size and shape of the hole made in the supply line by this
type of device may restrict water flow.
This equipment must be installed to comply with the Basic Plumbing Code of the Building
Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).
4
28364 051100
PLUMBING HOOK-UP
1. Securely attach the short piece of tubing on the water strainer assembly to the inlet fitting on the bottom of
the dispenser.
2. Flush the water line and securely attach it to the flare fitting on the water strainer assembly.
3. Turn-on the water supply.
INITIAL FILL & HEAT
CAUTION - The dispenser must be disconnected from the power source throughout the initial fill & heat, except
when specified in the instructions.
1. Turn-on the water supply and connect the dispenser to the power source.
2. Water will automatically flow into the tank to the proper level and then shut-off. This will take less than five
minutes.
3. When the tank is full of water, open the front door and place the heater switch in the “ON” (lower) position.
A tank full of cold water will take approximately forty minutes for the water to heat on 120 volt versions, and
twenty minutes on 120/240 and 240 volt versions.
During this waiting period, complete these dispenser set-up steps:
a. Place a set of keyholes in the splash panel over the screws beneath the hopper access door and push down
gently.
b. Place the drip tray onto the supports on the splash panel. Hook the tabs on the rear of the drip tray through
the holes in the splash panel. Set the drip tray cover in place.
c. Fill the hopper(s) with the dry product to be dispensed.
DISPENSER USE
1. Simply place a cup on the drip tray beneath the desired dispensing tip.
2. Press the button to froth and dispense the beverage.
3. Release the button when the cup is approximately 2/3 full and allow the mixing chamber to drain.
NOTE - The mixing chamber must drain at the end of each dispense.
COLD BEVERAGE SET-UP (OPTIONAL)
Cold beverages may be dispensed from the left dispense position on the FMD-2 & FMD-3 models. Simply
place the HOT/COLD switch near the left whipper chamber in the “COLD” (upper) position.
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
surfaces on Bunn-O-Matic equipment.
ADJUSTMENTS
The hot or cold beverage solenoid(s) is (are) preset to dispense approximately one ounce per second. This
amount can be adjusted:
1. Disconnect the dispenser from the power source.
2. Remove the small left side access panel.
3. Rotate the control at the base of the desired solenoid(s) clockwise to decrease or counterclockwise to
increase the amount of water.
4. For cold beverage adjustment remove the 1-1/2” plug on the lower left side of the dispenser and rotate the
needle valve clockwise to decrease or counterclockwise to increase the amount of cold water.
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28364 011598
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 tank heater switch in the “OFF” (upper) position.
3. Shut-off and disconnect the incoming water supply.
4. Remove the top panel.
5. Gently remove one of the grommets from the tank lid.
6. Insert a tube to the bottom of the tank and syphon ALL of the water out.
(Bunn-O-Matic has a syphon assembly #12440.0000 available for this purpose.)
NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power
source.
HOPPER DISPENSE RATE OF PRODUCT
1. Hopper dispense rate with 22 tooth gear and auger wire is approximately 4 to 6 grams per second.
2. Hopper dispense rate with 22 tooth gear and auger wire with optional restrictor is approximately 3 to 5
grams per second.
3. Hopper dispense rate with optional 32 tooth gear and auger wire is 6 to 9 grams per second.
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 or 240 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.
• This unit is heated at all times. 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
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28364 011598
TROUBLESHOOTING (cont.)
PROBLEM
Product will not dispense
PROBABLE CAUSE
1. No water
2. No power or incorrect voltage to
the dispenser
3. Dispense switch
REMEDY
Water lines and valves to the dispenser must be open.
(A1) Check for 120 volts across the
black and white wires on two wire
120 volt dispenser.
(A2) Check for 120 volts across the
red and white wires and the black
and white wires on three wire 120/
240 volt dispenser.
(A3) Check for 240 volts across the
white and black wires on two wire
240 volt dispenser.
(B) Check circuit breakers or fuses.
Refer to
Service
- Dispense Switch
for testing procedure. See page 17
4. Dispense solenoid valve
(Hot or Cold)
5. Solenoid valve (Inlet)
6. Level control board and probe
7. Overflow protection switch
8. Auger drive
Refer to
Service
- Dispense solenoid
valve for testing procedures. See
page 29 or 30
Refer to
Service
- Solenoid Valve
(Inlet) for testing procedures. See
page 31
Refer to
Service
- Level Control Board
and Probe for testing procedures.
See page 24
Refer to
Service
- Overflow protection switch for testing procedures.
See page 27
Refer to
Service
- Auger Drive. See
page 12
7
28364 011598
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Product will not dispense (cont.)
Water is not hot
9. Water strainer
10. Lime build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions.
Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious
leaks.
1. Limit thermostat
CAUTION - Do not eliminate or bypass limit thermostat. Use only BOM
replacement part #29329.1000
2. Control thermostat
(A) Direction of flow arrow must be
pointing towards dispenser.
(B) Remove the strainer and check
for obstructions. Clear or replace.
Inspect the tank assembly for excessive lime deposits. Delime as required.
Refer to
Service
- Limit Thermostat
for testing procedures. See page 26
Refer to
Service
- Control Thermostat for testing procedures. See page
16
Spitting or excessive steaming
3. Tank Heater
4. Tank heater switch
1. Lime build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions.
Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious
leaks.
2. Control thermostat
Refer to
Service
- Tank Heater for
testing procedures. See page 32
Refer to
Service
- Tank Heater Switch
for testing procedures. See page 33
Inspect tank assembly for excessive
lime deposits. Delime as required.
Refer to
Service
- Control Thermostat for testing procedures. See
page 16
8
28364 051100
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Dripping from dispense tip
Water flows into tank continuously
1. Lime build-up
CAUTION - Tank and tank components should be delimed regularly
depending on local water conditions.
Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious
leaks.
2. Dispense solenoid valve (Hot or
Cold)
1. Level control board and probe
2. Solenoid valve (Inlet)
Inspect the tank assembly for excessive lime deposits. Delime as required.
Remove the dispense solenoid valve
and clear any obstructions. Rebuild
or replace the valve if necessary. See
page 29 or 30
Refer to
Service -
Level Control Board
and Probe for testing procedures.
See page 24
Refer to
Service
- Solenoid Valve
(Inlet) for testing procedures. See
page 31
Product overflows container
3. Overflow Protection Switch
1. Dispense switch
2. Dispense solenoid valve (Hot or
Cold)
Refer to
Service
- Overflow Protection Switch for testing procedures.
See page 27
Refer to
Service -
Dispense Switch
for testing procedures. See page 17
Remove the solenoid valve and clear
any obstructions. Rebuild or replace
the valve if necessary. See page 29
or 30
9
28364 011598
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Weak product
1. Water temperature
2. Whipper motor
3. Frother
Place an empty container beneath
the dispense tip. Initiate a dispense
cycle and check the water temperature immediately below the dispense
tip with a thermometer.
(A) Reading for mechanical thermostat models should be 180°F to 200°F
(see thermostat temperature settings
decal in
USER NOTICES
on page 3.
(B) Reading for electronic thermostat should be185°F to 190°F.
Adjust the control thermostat to increase or decrease the water temperature. Replace if necessary.
Refer to
Service
- Whipper Motor for
testing procedure. See page 19
Refer to
Service
- Frother Compo-
nents. See page 19
4. Dispense solenoid valve
(Hot or Cold)
5. Auger drive
6. Auger spring
7. Auger motor
8. Rinse/Run switch
Refer to
Service
- Dispense Solenoid
Valve for test procedures. See page
29 or 30
Refer to
Service
- Auger Drive Com-
ponents. See page 12
Refer to
Service
- Auger Drive Com-
ponents. See page 12
Refer to
Service
- Auger Drive Com-
ponents. See page 14
Refer to
Service -
Rinse/Run Switch
for test procedures. See page 28
10
28364 011598
TROUBLESHOOTING (CONT.)
PROBLEM
Dispenser is making unusual
noises
Excess dust
PROBABLE CAUSE
1. Plumbing Lines
2. Water Supply
3. Tank Heater
1. Fan
2. Hopper Delay Board
REMEDY
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).
Remove and clean lime off the tank
heater. See page 32
Refer to
Service
- Fan for testing
procedures. See page 18
Refer to
Service
- Hopper Delay Board
for testing procedures. See page 21
Display not lit
1. Lamp
2. Lamp Holder
3. Starter - Lamp
4. Ballast
Refer to
Service
- Lamp, see page 23
for lamp replacement.
Refer to
Service
- Lamp Holder for
testing procedures. See page 23
Refer to
Service
- Starter for testing
procedures. See page 24
Refer to
Service
- Ballast for testing
procedures. See page 15
11
28364 051100
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