Bunn VLPF User Manual

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BUNN
®
VLPF
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
Page 2
INTRODUCTION
This equipment will brew a half-gallon batch of coffee into an awaiting decanter and dispense hot water on
demand for other purposes. It has two warmers to keep the beverage at the right temperature. The brewer is
only for indoor use on a sturdy counter or shelf.
CONTENTS
Introduction and Warranty..................................................................... 2
User Notices .......................................................................................... 3
Electrical, Plumbing Requirements, Operating Controls ........................ 4
Initial Setup, Brew Volume Adjustments................................................ 5
Coffee Brewing, Cleaning ....................................................................... 6
Troubleshooting..................................................................................... 7
Service................................................................................................. 13
Wiring Diagram ................................................................................... 28
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.
10179 060100
Page 3
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your
protection. All notices on the equipment should be kept in good condition. Replace any unreadable or dam-
aged labels.
#00656.0000
#00658.0000
#00882.0000
Page 4
ELECTRICAL REQUIREMENTS
CAUTION - The brewer must be disconnected from the power source until specified in
Initial Set-Up.
The brewer has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp, single
phase, 60 Hz.
PLUMBING REQUIREMENTS
This brewer must be connected to a cold water system with operating pressure between 20(138) and 90
psi(620 kPa) from a 1/2 or larger supply line. A shut-off valve should be installed in the line before the brewer.
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. A tight coil of copper tubing in the water line will facilitate moving
the brewer to clean the countertop. 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.
Plumbing Hook-Up
1. Attach the female fitting from the short piece of tubing on the flow control/strainer assembly (supplied) to the
water inlet fitting on the right rear side of the brewer.
2. Flush the water line and securely attach it to the flare fitting on the flow control/strainer assembly.
3. Turn on the water supply
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 Administra-
tion (FDA).
OPERATING CONTROLS
A. On/Left Switch
Placing the switch in the upper position supplies power to the left decanter warmer and enables brewing and
refilling of the tank. Placing the switch in the lower position cuts power to the left decanter warmer and stops
brewing and refilling of the tank. Stopping a brew cycle after it has been started will not stop the flow of water
into the funnel until the tank syphons down to its proper level.
NOTE - The On/Left switch must be in the upper position to initiate and complete a brew cycle or to automatically
refill the tank after using the hot water faucet.
B. Start Switch
Starts a brew cycle when the On/Left switch is in the upper position.
C. Right Switch
Placing the switch in the upper position supplies power to the right decanter warmer. Placing the switch in
the lower position cuts power to the right decanter warmer.
10179 060100
Page 5
10179 060100
INITIAL SET-UP
CAUTION - The brewer must be unplugged throughout the
Initial Set-up
, except when specified in the instruc-
tions.
1. Remove the top lid from the brewer.
2. Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the top lid.
3. Insert an empty funnel into the funnel rails.
4. Place a decanter containing a small amount of water on the left warmer.
5. Plug in the brewer and place the On/Left switch in the upper position. Water will flow into the tank after a five
second delay and continue until the tank has filled to its capacity. This should take approximately seven
minutes.
NOTE - The On/left switch must be in the upper position to initiate and complete a brew cycle or to automatically
refill the tank after using the hot water faucet.
6. Place the On/left switch in the lower position.
7. Unplug the brewer.
8. Remove the top lid.
9. Rotate the control thermostat knob fully clockwise to the ON position and replace the top lid.
10. Plug in the brewer and wait for the water in the tank to heat to the proper temperature. Some water will drip
from the funnel during this time. This is due to expansion and should not occur thereafter.
11. Place an empty decanter under the funnel.
12. Place the On/Left switch in the upper position and press the Start switch. Empty the decanter after water has
stopped flowing from the funnel.
13. Allow the water in the tank to reheat to the proper temperature.
14. Press the Start switch. Check the water volume in the decanter after water has stopped flowing from the
funnel. It should be 64 ounces.
15. If not, unplug the brewer and remove the top lid.
16. Adjust the brew timer as required. See
Adjusting Brew Volumes.
Replace the top lid, plug in the brewer, start,
and measure another brew cycle.
17. Repeat steps 13-16 until 64 oz. water volume is achieved.
ADJUSTING BREW VOLUMES
CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement
or adjustment of any component.
NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is
properly filled, and a funnel and server are in place.
1. Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the SET
position on the circuit board.
To increase a batch size. Press and hold the START or BREW switch until three clicks are heard. Release the
switch (Failure to release the switch within two seconds after the third click causes the volume setting to be
aborted and previous volume setting will remain in memory) and press it again one or more times. Each time
the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order
to verify that the desired volume has been achieved.
To decrease a batch size. Press and release the START or BREW switch once for every two-second interval
to be removed from the total brew time period; then immediately press and hold down the START or BREW
switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after
the third click causes the volume setting to be aborted and previous volume setting will remain in memory).
Allow the brew cycle to finish in order to verify that the desired volume has been achieved.
Page 6
2. Setting batch sizes. To set a batch volume, first check that the SET/LOCK switch is in the SET position on
the circuit board. Press and hold the START or BREW switch until three distinct clicks are heard, and then
release the switch. (Failure to release the switch within two seconds after the third click causes the volume
setting to be aborted and previous volume setting will remain in memory). View the level of the liquid being
dispensed. When the desired level is reached, turn the ON/OFF switch to OFF. The brewer remembers this
volume and will continue to brew batches of this size until the volume setting procedure is repeated.
NOTE: When brewing coffee, batch volumes will decrease due to absorption by the coffee grounds.
3. Setting programming disable feature. If it becomes necessary to prevent anyone from changing brew times
once programmed, you can set the SET/LOCK switch to the LOCK position. This will prevent any program-
ming to be done until switch is once again placed in the SET position.
COFFEE BREWING
1. Insert a BUNN
®
filter into the funnel.
2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking.
3. Slide the funnel into the funnel rails.
4. Place the On/Left switch in the upper position.
5. Press the Start switch.
6. When brewing is completed, simply discard the grounds and filter.
NOTE - Any attempt to draw hot water from the faucet during a brew cycle will result in a lesser amount of
finished beverage in the decanter.
CLEANING
1. 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.
2. Check and clean the sprayhead. The sprayhead holes must always remain open.
3. With the sprayhead removed, insert the deliming spring (provided) all the way into the sprayhead tube.
When inserted properly , no more than two inches of spring should be visible. Saw back and forth five or six
times. Then, repeat this step for the airvent tube.
NOTE - In hard water areas, this may need to be done daily. It will help prevent liming problems in the brewer and
takes less than a minute.
ADJUSTING BREW VOLUMES(cont)
10179 060100
Page 7
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 Services Department.
Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-
nel.
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 brewer is heated at all times unless unplugged. Keep away from combustibles.
WARNING
Exercise extreme caution when servicing electrical equipment.
Unplug the brewer when servicing, except when electrical tests are specified.
Follow recommended service procedures.
Replace all protective shields or safety notices.
10179 060100
Page 8
TROUBLESHOOTING (cont.)
PROBLEM
Equipment will not operate
Brew cycle will not start
Automatic refill will not operate af-
ter drawing hot water.
PROBABLE CAUSE
1. No power or incorrect voltage
1. No water
2. Water strainer/Flow Control
3. On/Left switch
4. Start switch
5. Brew timer
6. Relay
7. Solenoid valve
1. On/Left switch
REMEDY
(A) Plug in brewer.
(B) Check wall outlet for 120V ac
(C) Check circuit breaker/fuse.
Check plumbing and shut-off
valves.
(A) Direction of flow arrow must
be pointing towards brewer.
(B) Remove the strainer/Flow con-
trol and check for obstructions.
Clear or replace.
Refer to
Service -
On/Left switch
for testing procedures. See page
22.
Refer to
Service -
Start switch for
testing procedures. See page 26.
Refer to
Service -
Brew timer for
testing procedures. See page 16.
Refer to
Service -
Relay for test-
ing procedures. See page 23.
Refer to
Service -
Solenoid valve
for testing procedures. See page
25.
(A) The On/Left switch must be in
the upper position for the auto-
matic refill to operate.
(B) Refer to
Service -
On/Left
switch for testing procedures. See
page 22.
10179 060100
Page 9
TROUBLESHOOTING (cont.)
PROBLEM
Automatic refill will not operate
after drawing hot water.(cont.)
Water flows into tank continuously
(On/left switch OFF)
Water flows into tank continuously
(On/left switch ON)
Water is not hot.
PROBABLE CAUSE
2. Liquid level control system
3. Relay
4. Solenoid valve
1. Solenoid valve
1. Liquid level control system
2. Relay
3. Brew timer
1. Limit thermostat
CAUTION: Do not eliminate or by-
pass limit thermostat. Use only
.replacement part #29329.1000
2. Control thermostat
3. Tank heater
REMEDY
Refer to
Service -
Liquid Level
Control system for testing proce-
dures. See page 20.
Refer to
Service -
Relay for test-
ing procedures. See Page 23.
Refer to
Service -
Solenoid valve
for testing procedures. See page
25.
Refer to
Service -
Solenoid valve
for testing procedures. See page
25.
Refer to
Service -
Liquid Level
Control system for testing proce-
dures. See page 20.
Refer to
Service -
Relay for test-
ing procedures. See page 23.
Refer to
Service -
Brew timer for
testing procedures. See page 14.
Refer to
Service -
Limit Thermo-
stat for testing procedures. See
page 19.
Refer to
Service -
Control Thermo-
stat for testing procedures. See
page 17.
Refer to
Service -
Tank Heater for
testing procedures. See page 27.
10179 060100
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