Bunn FMD-1, FMD-2 User Manual

BUNN

®

FMD-1

FMD-2

S/N FMD0013000-UP

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OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: [phone] FAX: [phone]

29112.0000 5/00 ©1998 Bunn-O-Matic Corporation

INTRODUCTION

This equipment dispenses hot beverages or soups on demand from powered product. It is for indoor use only
on a sturdy counter or shelf.

WARRANTY

Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects
in material and workmanship existing at the time of manufacture and appearing within one year from the date of
installation. In addition:

1.) Bunn warrants electronic circuit and/or control boards to be commercially free from defects in material and

workmanship for two years from the date of installation.

2.) Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in material

and workmanship for two years from the date of installation.

3.) Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original factory

screen sieve analysis for three years from date of installation or for 30,000 pounds of coffee, whichever comes first.

This warranty does not apply to any equipment, component or part that was not manufactured by Bunn or that,
in Bunn’s judgement, has been affected by misuse, neglect, alteration, improper installation or operation, improper
maintenance or repair, damage or casualty.

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.

The Buyer shall give 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. If requested by Bunn, the Buyer
shall ship the defective equipment prepaid to an authorized Bunn service location. If Bunn determines, in its sole
discretion, that the equipment does not conform to the warranty, Bunn shall repair the equipment with no charge
for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during
the warranty period. If Bunn determines that repair is not feasible, Bunn shall, at its sole option, 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, AS
SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, 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.

RELEASE BUTTON WHEN CUP IS 2/3 FULL

PLACE

CUP HERE

FMD-1 28328.0004

2

RELEASE BUTTON WHEN CUP IS 2/3 FULL

PLACE

CUP HERE

PLACE

CUP HERE

FMD-2 28328.0005

29112 051200

PUSH and HOLD BUTTON UNTIL CUP

IS 2/3 FULL, THEN RELEASE

USER NOTICES (Cont.)

00656.0000

00831.0000

27096.0000 FMD-1 ONLY

28368.0001

PUSH and HOLD BUTTON UNTIL CUP

IS 2/3 FULL, THEN RELEASE

28964.0000

28964.0001

3

29112 101598

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 packaging material, 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 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 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 brewer 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 brewer. 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. 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.

4

29112 051200

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 forty minutes for the water to heat on 120 volt versions or
twenty 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 hopper 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 for the FMD-2 only has not successfully refilled in 7 1/2
minutes, a refill error occurs.

When a refill error occurs, the refill solenoid is de-energized and the 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 disconnecting (for at least 5 seconds) and then
reconnecting the power to the machine.

RINSE TIMER (FMD-2 ONLY)

The dispenser is shipped from the factory with the rinse timer disabled. To enable the rinse timer, remove

power from the dispenser, remove the lower access panel, and remove the jumper from J1 of the control board.
Replace the lower access panel, and return power to the dispenser.

When enabled, the rinse timer automatically keeps 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 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 rinse
L.E.D. will light continuously, and the 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 two positions (FMD-2 only) dispense for at least 10 seconds.

3. After the rinse L.E.D. has extinguished, the rinse timer is reset (FMD-2 only).

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 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.

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29112 101598

COLD BEVERAGE SET-UP (OPTIONAL FMD-2 ONLY)

Cold beverages may be dispensed from the left dispense position as follows:

1. Disconnect the dispenser from the power source.

2. Remove the lower front access panel.

3. Locate the Hot/Cold jumper connection near the whipper panel in the main wiring harness.

4. Remove the Hot jumper connection (red jumper plug) from the main wiring harness and connect the Cold
jumper connection (blue jumper plug) to the main harness.

5. Replace the lower front access panel and reconnect the dispenser to the power source.

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 one 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 ADJUSTMENT (FMD-1)

The hopper dispense rate is preset at the factory. With 8 tooth gear and auger wire the preset dispense rate is
approximately 3 to 5 grams per second. With 12 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. Set the tank heater switch to the off position.

2. Open the top front cover of the dispenser and remove the two screws securing the top cover.

3. Remove the top cover assembly and set it aside.

4. Locate the motor speed adjuster (leftmost) on the dispenser cabinet top cross member.

5. Using extreme care not to touch the live terminals of the tank heater, adjust the motor speed by rotating the

motor speed adjuster to the desired point, ranging from minimum (full counterclockwise) to maximum
(full clockwise.)

6. After the motor adjustment is complete, replace the top cover assembly, securing it with the two screws,

and return the tank heater switch to the on position.

HOPPER MOTOR SPEED PROGRAMING (FMD-2)

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 32 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%.

6

29112 101598

4. Return the rinse/run switch to the run position after hopper motor speed adjustments are complete.

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.

7

29112 101598

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 21

4. Dispense Solenoid Valve

8

Refer to

Service

- Dispense Solenoid
Valve for testing procedures. See
page 34

29112 101598

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 35

6. A) Level Control Board and Probe

- FMD-1

B) Control Board and Probe - FMD­2

7. A) Auger Drive - FMD-1

B) Auger Drive - FMD-2

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.

Refer to

Service

- Level Control Board
and Probe for testing procedures.
See page 29

Refer to

Service

- Control Board and
Probe for testing procedures. See
page 19

Refer to

Service

- Auger Drive. See

page 13

Refer to

Service -

Auger Drive. See

Page 15

(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.

Water is not hot

10. Transformer - FMD-2

1. Limit Thermostat
CAUTION - Do not eliminate or by­pass limit thermostat. Use only BOM
replacement part #29329.1000

2. Control Thermostat

3. Tank Heater

9

Refer to

Service

- Transformer for

testing procedures. See page 38

Refer to

Service

- Limit Thermostat

for testing procedures. See page 31

Refer to

Service

- Control Thermo­stat for testing procedures. See page
18

Refer to

Service

- Tank Heater for

testing procedures. See page 36

29112 051200

TROUBLESHOOTING (cont.)

PROBLEM

PROBABLE CAUSE

REMEDY

Water is not hot (Cont.)

Spitting or excessive steaming

Dripping from dispense tip

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

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.

Refer to

Service

- Tank Heater Switch

for testing procedures. See page 37

Inspect the tank assembly for exces­sive lime deposits. Delime as re­quired.

Refer to

Service

- Control Thermo­stat for testing procedures. See
page 18

Inspect the tank assembly for exces­sive lime deposits. Delime as re­quired.

Water flows into tank continuously

2. Dispense Solenoid Valve

1. A) Level Control Board and Probe

- FMD-1

B) Control Board and Probe - FMD­2

2. Solenoid Valve (Inlet)

Remove the dispense solenoid valve
and clear any obstructions. Rebuild
or replace the valve if necessary. See
page 34

Refer to

Service -

Level Control Board
and Probe for testing procedures.
See page 29

Refer to

Service -

Control Board and
Probe for testing procedures. See
page 19

Refer to

Service

- Solenoid Valve
(Inlet) for testing procedures. See
page 35

10

29112 101598

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 21

Remove the solenoid valve and clear
any obstructions. Rebuild or replace
the valve if necessary. See page 34

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 for mechanical thermostat

models should be 180°F to 200°F

(see thermostat temperature settings
decal in

Refer to

USER NOTICES

Service

- Whipper Motor for

on page 3.)

testing procedure. See page 24

Refer to

Service

- Frother Compo-

nents. See page 24

4. Dispense Solenoid Valve

5. Auger Drive - FMD-1

Auger Drive - FMD-2

6. Auger Spring - FMD-1

Auger Spring - FMD-2

7. Auger Motor - FMD-1

Auger Motor - FMD-2

8. Rinse/Run Switch - FMD-1

Rinse/Run Switch - FMD-2

9. Rinse Timer - FMD-2

Refer to

Service

- Dispense Solenoid
Valve for test procedures. See page
34

Refer to

Service

- Auger Drive Com­ponents. See page 13
See page 15

Refer to

Service

- Auger Drive Com­ponents. See page 13
See page 15

Refer to

Service

- Auger Drive Com­ponents. See page 13
See page 15

Refer to

Service -

Rinse/Run Switch
for test procedures. See page 31
See page 32

Refer to

Operation

- Rinse Timer.

See Page 5

11

29112 101598

TROUBLESHOOTING (CONT.)

PROBLEM

Dispenser is making unusual
noises

Excess dust

PROBABLE CAUSE

1. Plumbing Lines

2. Water Supply

3. Tank Heater

1. Fan

2. A) Hopper Drive Board - FMD-1

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 36

Refer to

Service

- Fan for testing

procedures. See page 23

Refer to

Service

- Hopper Drive Board

for testing procedures. See page 26

Display not lit

B) Control board - FMD-2

1. Lamp

2. Lamp Holder

3. Starter - Lamp

4. Ballast

Refer to

Service

- Control Board for

testing procedures. See page 19

Refer to

Service

- Lamp, see page 28

for lamp replacement.

Refer to

Service

- Lamp Holder for

testing procedures. See page 28

Refer to

Service

- Starter for testing

procedures. See page 29

Refer to

Service

- Ballast for testing

procedures. See page 17

12

29112 051200