This equipment dispenses hot beverages or soups on demand from powdered product. 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.
!
WARNING
H O T
RELEASE BUTTON WHEN CUP IS 2/3 FULL
L I Q U I D
FMD-4 28328.0008
PLACE
CUP HERE
PLACE
CUP HERE
PLACE
CUP HERE
PLACE
CUP HERE
FMD-5 28328.0009
2
35135 012103
USER NOTICES (Cont.)
00831.0000
00656.0000
28368.0000
FMD-4 28964.0004
FMD-5 28964.0003
3
35135 012103
INITIAL SET-UP
1.Locate the drip tray assembly inside the dispenser door.
2.Remove the drip tray and the drip tray cover and set them aside.
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 and requires 2-wire, grounded service rated 120
volts ac, 15 amp, single phase, 60 Hz. The mating connector must be a NEMA 5-15R.
The 120/208 and the 120/240 versions of this dispenser has an attched cordset. The mating connector must be
a NEMA 14-20R.
(
Refer to the dispenser’s dataplate for exact voltage requirement.)
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 100 psi
(138 and 690 kPa). This water source must be capable of producing a minimum flow rate of 4.5 fluid ounces
(133.1 ml) per second. A shut-off valve should be installed in the line before the dispenser. Install a regulator in
the line when pressure is greater than 100 psi (690 kPa) to reduce it to 50 psi (345 kPa). The water inlet fitting
is 3⁄8" flare.
NOTE - 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 00327-0000). 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).
PLUMBING HOOK-UP
1.Flush the water line and securely attach it to the flare fitting on the bottom of the dispenser.
2.Turn-on the water supply.
4
35135 012103
INITIAL FILL & HEAT
CAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, 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 eighty minutes for the water to heat on 120 volt versions or
forty minutes for 120/208 volt versions and 120/240 volt versions.
During this waiting period, complete these dispenser set-up steps:
a. Place the drip tray in front of the dispenser. Set the drip tray cover in place.
b. Place a set of keyholes in the cup locator plate over the screws beneath the hopper access door and push down
gently.
c. Fill the hoppers with the dry product to be dispensed.
LIQUID LEVEL CONTROL
The system automatically maintains the hot water tank’s level by energizing the refill solenoid when the water
level drops below the liquid level probe. If the system has not successfully refilled in 15 minutes, a refill error occurs.
When a refill error occurs, the refill solenoid is de-energized and the left rinse L.E.D. will flash about once every
5 seconds. Once the cause of the refill error has been investigated (see the troubleshooting guide in the Operating
and Service Manual) and cured, the system can be reset by placing the Rinse/Run switch in the programming
(center) position, momentarily.
RINSE TIMERS
The dispenser is shipped from the factory with the rinse timers disabled. To enable the rinse timers, remove
power from the dispenser, remove the lower access panel, and remove the jumper from J1 of the control boards.
Replace the lower access panel, and return power to the dispenser. When enabled, the rinse timers automatically
keep track of the time since the dispenser was last run through a rinse sequence. If the dispenser detects that a
rinse sequence has not been run for 8 hours, the appropriate rinse L.E.D. will flash continually. If, after an additional
4 hours (12 hours total), a rinse sequence has still not been run, the appropriate rinse L.E.D. will light continuously,
and the appropriate hopper drives will be disabled until a rinse sequence has been run.
RUNNING A RINSE SEQUENCE
1. Place the rinse/run switch in the rinse position.
2. Sequentially, or simultaneously, at each of the positions dispense for at least 10 seconds.
3. After the rinse L.E.D. has extinguished, the rinse timer is reset.
4. Return the rinse/run switch to the run position.
DISPENSER USE
1.Simply place a cup on the drip tray beneath the dispensing tip.
2.Press the button and dispense the beverage.
3.Release the button when the cup is approximately 2/3 full and allow the whipper chamber to drain.
NOTE - The whipper chamber must drain at the end of each dispense.
5
35135 012103
COLD BEVERAGE SET-UP (OPTIONAL)
Cold beverages may be dispensed from the left dispense position. Simply place the HOT/COLD switch near the left
whipper chamber in the “COLD” (upper) position.
CLEANING
Refer to the decal on the rear of the dispenser door for cleaning recommendations and proccedures.
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 beverage solenoid is preset to dispense approximately 9/10 ounce per second. This amount can be adjusted:
1. Disconnect the dispenser from the power source.
2. Remove product hopper(s).
3. Remove the hole plug(s) in the auger motor mounting panel.
4. Rotate the control at the base of the solenoid clockwise to decrease or counterclockwise to increase the amount
of water.
5. Reinstall plug(s) and hopper(s).
HOPPER MOTOR SPEED PROGRAMING
The hopper dispense rate is 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 rate can be adjusted to produce a wide range of dispense rates as
follows:
1. Place the rinse/run switch in the center (program) position.
2. Place the increase/decrease switch in the desired (increase or decrease) position.
3. Press and release the dispense switch for the chamber you wish to adjust. Each time the dispense switch is
pressed, the rinse L.E.D. will flash, and the motor speed for that hopper will be increased/decreased by
approximately 2 1/2%.
4. Return the rinse/run switch to the run position after hopper motor speed adjustments are complete.
6
35135 012103
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. Place the tank heater switch in the “OFF” position.
3. Shut-off and disconnect the incoming water supply.
4. Remove the front, lower access panel.
5. Pull out drain tube to empty into a sink or a container with a minimum of 6-1/2 gallon capacity.
6. Make sure drain clamp is closed. Then, remove drain plug.
7. Direct tube into sink or container and open drain clamp. Continue draining tank until ALL of the water is out.
WARNING: Be very careful with the draining water because it can be very hot.
8. Close drain clamp, insert drain plug, place drain tube back into machine, and replace lower access panel.
NOTE - The dispenser must be refilled using the
source.
INITIAL FILL & HEAT
steps before reconnecting to the power
7
35135 012103
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.
•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
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 dispensers.
(A2) Check for 120 volts across the
red and white wires and the black
and white wires, 208 volts across
the red and black wires on three wire
120/208 volt dispensers and 240
volts across the red and black wires
on three wire 120/240 volt dispensers.
(B) Check circuit breakers or fuses.
Refer to
Service
- Dispense Switch
for testing procedure. See page 23
4. Dispense Solenoid Valve
8
Refer to
Service
- Dispense Solenoid
Valve for testing procedures. See
page 35
35135 012103
TROUBLESHOOTING (cont.)
PROBLEM
Product will not dispense (cont.)
PROBABLE CAUSE
5. Solenoid Valve (Inlet)
REMEDY
Refer to
Service
- Solenoid Valve
(Inlet) for testing procedures. See
page 37
6. Control Board #1 and Probe
7. Auger Drive
8. Water Strainer
9. 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.
10. Transformer
Refer to
Service
- Control Board and
Probe for testing procedures. See
page 20
Refer to
Service
- Auger Drive. See
page 13 & 15
Remove the strainer and check for
obstructions. Clear or replace.
Inspect the tank assembly for excessive lime deposits. Delime as required.
Refer to
Service
- Transformer for
testing procedures. See page 41
Water is not hot
1. Limit Thermostat
CAUTION - Do not eliminate or bypass limit thermostat. Use only BOM
replacement part #29329.1000
2. Control Thermostat
3. Tank Heater
Refer to
Service
- Limit Thermostat
for testing procedures. See page 31
Refer to
Service
- Control Thermostat for testing procedures. See page
19
Refer to
Service
- Tank Heater for
testing procedures. See page 38
9
35135 012103
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Water is not hot (Cont.)
Spitting or excessive steaming
4. Tank Heater Switch
5. Relay (120V versions only)
6. Control Board #2 (120V versions
only)
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 Switch
for testing procedures. See page 39
Refer to
Service
- Relay for testing
procedures. See page 40
Refer to
Service
- Control Board #2
for testing procedures. See page 22
Inspect the tank assembly for excessive lime deposits. Delime as required.
Refer to
Service
- Control Thermostat for testing procedures. See
page 19
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
1. Control Board #1 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 35
Refer to
Service -
Control Board and
Probe for testing procedures. See
page 20
Refer to
Service
- Solenoid Valve
(Inlet) for testing procedures. See
page 37
10
35135 012103
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Product overflows container
Weak product
1. Dispense Switch
2. Dispense Solenoid Valve
1. Water Temperature
2. Whipper Motor
3. Frother
Refer to
Service -
Dispense Switch
for testing procedures. See page 23
Remove the solenoid valve and clear
any obstructions. Rebuild or replace
the valve if necessary. See page 35
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. Reading
should be 180°F to 200°F (see thermostat temperature settings decal
in
USER NOTICES
Refer to
Service
on page 3.)
- Whipper Motor for
testing procedure. See page 27
Refer to
Service
- Frother Compo-
nents. See page 26
4. Dispense Solenoid Valve
5. Auger Drive
6. Auger Spring
7. Auger Motor
8. Rinse/Run Switch
9. Rinse Timer
10. Relay (120V versions only)
Refer to
Service
- Dispense Solenoid
Valve for test procedures. See page
35
Refer to
Service
- Auger Drive Com-
ponents. See page 13 & 15
Refer to
Service
- Auger Drive Com-
ponents. See page 13 & 15
Refer to
Service
- Auger Drive Com-
ponents. See page 13 & 15
Refer to
Service -
Rinse/Run Switch
for test procedures. See page 32
Refer to
Operation
- Rinse Timer.
See Page 5
Refer to
Service
- Relay for testing
procedures. See page 40
11. Control Board #2 (120V versions
only)
11
Refer to
Service
- Control Board #2
for testing procedures. See page 22
35135 012103
TROUBLESHOOTING (CONT.)
PROBLEM
Dispenser is making unusual
noises
Excess dust
Display not lit
PROBABLE CAUSE
1. Plumbing Lines
2. Water Supply
3. Tank Heater
1. Fan
1. Lamp
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 100 psi (690 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 38
Refer to
Service
- Fan for testing
procedures. See page 25
Refer to
Service
- Lamp, see page 29
for lamp replacement.
2. Lamp Holder
3. Starter - Lamp
4. Ballast
Refer to
Service
- Lamp Holder for
testing procedures. See page 29
Refer to
Service
- Starter for testing
procedures. See page 30
Refer to
Service
- Ballast for testing
procedures. See page 18
12
35135 012103
SERVICE
This section provides procedures for testing and
replacing various major components used in this
dispenser should service become necessary. Refer to
Troubleshooting
cause of any problem.
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified
service personnel. The dispenser should be unplugged when servicing, except when electrical tests
are required and the test procedure specifically states
to plug-in the dispenser.
COMPONENT ACCESS
WARNING - Disconnect the dispenser from the power
source before the removal of any panel or the replacement of any component.
All components are accessible by opening the
door, removal of the door panels, dispenser top covers, hopper(s), hopper support plate, splash guard,
splash panel w/drip tray, lower front access panel and
rear access cover.
Refer to the contents listing for component location.
The auger components are located inside the
bottom part of the hopper except for the auger drive
bracket, spacer and retaining clip, which are located
on the outside rear of the hopper base. The auger
motor is located on the lower right rear of the motor
mounting panel. Refer to Fig. 2 for disassembly and
assembly.
Test Procedures - Auger Motor
1.Disconnect the dispenser from the power source.
2.Disconnect the white/red wire and the white wire
from the hopper speed control board.
3.Check the voltage across the white/red wire and
the white wire with a voltmeter. With the rinse/
run switch in the run (lower) position, connect
the dispenser to the power supply. The indication must be :
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt or
120/240 volt models.
4.Disconnect the dispenser from the power sup-
ply.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the wiring diagram and check the dispenser wiring harness.
13
P2635
35135 012103
SERVICE
AUGER DRIVE COMPONENTS - FMD-4 (CONT.)
5. Check the voltage across the positive (red wire)
terminal and the negative (black wire) terminal on
the auger motor with a voltmeter. With the rinse/
run switch in the run (lower) position press and
hold the dispense switch. Connect the dispenser
to the power supply. After a .6 second delay the
indication must be 4.0 to 24.5 volts dc.
If voltage is present as described, the auger motor
drive is operating properly. If auger does not turn,
replace the auger motor.
If voltage is not present as described, replace the
auger hopper drive board.
Removal, Cleaning and Replacement
Hopper & Auger
1. Open the dispenser door and raise the top front
cover.
2. Lift the hopper assy (15) over the pins on hopper
support plate (11) and slide hopper assembly out
the front of the dispenser.
3. Remove hopper lid (1) and empty product.
4. Pull off the ejector elbow (14).
5. Remove retainer clip (10) and washer (9) from the
bottom of the hopper base (8).
6. Remove whipper shaft (3), wiper blade (4) and
wiper drive gear (5) from the hopper base (8).
7. Remove auger wire (13) by pulling it out the front
of the hopper base (8).
8. Remove auger drive bracket (6) by unscrewing left
hand threads from auger drive shaft (12).
9. Slide spacer (7) and auger drive shaft bracket (6)
off of the auger drive shaft (12).
10. Remove auger drive shaft (12) from hopper base
(8).
11. Wash components in a mild solution of dish detergent using a bristle brush when needed.
12. Rinse and dry each item thoroughly.
13. Check for damaged or broken components, replace any if necessary and reassemble hopper
assembly.
14. Install hopper assy (15) in the dispenser by sliding
hopper assy on the hopper support plate (11) until
the slot in the rear of the hopper base (8) seats
against the pins in the hopper support plate (11).
1
2
3
4
6
5
12
13
7
14
8
9
10
15
16 17 18 19 11
FIG. 2 AUGER DRIVE & HOPPER DISASSEMBLY
1. Hopper Lid
2. Hopper
3. Wiper Shaft
4. Wiper Blade
5. Wiper Drive Gear
6. Auger Drive Bracket
7. Spacer
8. Hopper Base
9. Washer
10. Retainer Clip
11. Hopper Support Plate
12. Auger Drive Shaft
13. Auger Wire
14. Ejector Elbow
15. Hopper Assembly
16. Auger Motor Bracket
17. Auger Motor
18. Dust Seal
19. Auger Motor Mounting
panel
P2633
14
35135 012103
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