Bunn SL, SLF User Manual
BUNN
N
S
I
H
W
N
E
E
R
IAGRAM
G
I
H
W
IRING D
W
5
2
4
R
1
E
T
A
I
E
H
ATIC W
H
W
K
N
A
T
K
IT
L
T
B
A
IM
T
L
R
S
W
E
0
O
T
5
SCHEM
M
A
R
E
E
H
" H
T
M
I
R
H
A
W
W
P
&
E
.
T
U
E
I
L
A
K
W
"
H
T
B
S
S
W
O
M
2
R
P
E
H
T
F
O
S
I
H
IN
N
I
W
P
1
P
W
E
-
L
0
R
E
0
E
1
A
R
3
R
H
I
P
A
T
H
E
.
D
, &
R
W
R
E
2
O
R
Z
P
K
I
T
E
O
L
, P
R
C
T
1
B
M
E
A
P
R
L
N
A
K
O
N
L
O
W
P
B
C
/
A
U
I
L
H
B
W
1
P
I
W
0
H
0
W
1
T
N
O
R
F
R
K
P
E
L
O
M
/B
T
R
U
K
A
L
L
B
W
/B
N
R
B
3
P
N
W
IO
0
T
0
K
A
R
1
L
E
R
B
O
M
P
R
R
A
O
K
W
L
C
R
/B
IC
E
T
N
W
A
R
O
B
M
L
-
O
-
N
N
U
B
8
8
9
K
1
L
B
©
7
9
/
3
O
I
V
D
I/
0
H
0
0
W
0
.
3
4
0
0
1
E
R
I
W
2
K
L
C
B
E
A
S
A
S
T
H
L
P
O
E
V
L
Z
0
G
H
2
N
I
1
0
S
6
®
SL &
SL &
SLF
SLF
N
S
I
H
W
N
E
E
R
G
DIAGRAM
I
H
ING
W
IR
W
5
2
4
R
1
E
T
A
I
E
H
ATIC W
H
W
K
N
A
T
K
T
I
L
T
B
A
IM
T
L
R
S
W
E
0
O
T
5
SCHEM
M
A
R
E
E
H
" H
T
M
I
R
H
A
W
W
P
E
. &
T
U
E
I
L
A
W
"K
H
T
B
S
S
W
O
M
2
R
P
E
H
T
F
O
S
I
H
IN
IN
W
P
1
P
W
E
-
L
0
R
E
0
E
1
A
R
3
R
H
I
P
A
T
H
E
.
D
, &
R
R
W
E
2
O
R
P
K
IZ
T
E
O
L
, P
R
C
T
1
B
M
E
A
P
R
L
N
A
K
O
N
L
O
W
P
B
C
/
A
U
I
L
H
B
W
1
P
I
W
0
H
0
W
1
T
N
O
R
F
R
K
P
E
L
O
M
/B
T
R
U
K
A
L
L
B
W
B
/
N
R
B
3
P
N
W
IO
0
T
0
K
A
R
1
L
E
R
B
O
M
P
R
R
A
O
K
W
L
C
R
B
/
IC
E
T
N
W
A
R
O
B
M
L
-
O
-
N
N
U
B
8
8
9
1
K
L
B
©
7
/9
IO
3
D
I/V
0
H
0
0
W
.0
3
4
0
0
1
E
R
I
W
2
K
L
C
B
E
A
S
A
S
T
H
L
P
O
E
V
L
Z
0
G
H
2
N
I
1
0
S
6
T
R
A
T
S
T
N
O
R
F
P
O
R
T
E
W
O
L
/
N
O
R
E
W
O
L
T
N
O
R
F
P
O
T
R
A
E
R
R
A
P
E
O
R
T
P
O
T
G
IN
N
R
A
W
T
O
H
R
E
T
A
W
R
A
E
R
R
A
P
E
O
R
T
P
O
T
T
R
A
T
S
T
N
O
R
F
P
O
R
T
E
W
O
L
/
N
O
R
E
W
O
L
T
N
O
R
F
P
O
T
T
O
H
E
R
A
S
E
C
A
F
R
U
S
D
N
A
S
R
E
M
R
A
W
N
O
I
T
U
A
C
!
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10304.0000E 11/99 © 1988 BUNN-O-MATIC CORPORATION
T
O
H
E
R
A
S
E
C
A
F
R
U
S
D
N
A
S
R
E
M
R
A
W
N
O
I
T
U
A
C
!
CONTENTS
Introduction............................................................... 2
User Notices .............................................................. 3
Electrical Requirements............................................. 4
Plumbing Requirements ............................................ 5
Initial Set-Up..............................................................5
Operating Controls..................................................... 6
Cleaning..................................................................... 6
Coffee Brewing .......................................................... 6
Troubleshooting......................................................... 7
Service....................................................................... 12
Replacement parts..................................................... 25
Wiring Diagrams........................................................ 26
INTRODUCTION
This equipment will brew a half-gallon batch of coffee into an awaiting decanter at the press of a button. It
has two individually controlled warmers to keep the beverage in the decanters at the right temperature. The
model SLF will also dispense hot water on demand for other purposes. The brewer is only for indoor use 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.
Page 2
(Revised November 1999)
WARRANTY (cont.)
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 on the equipment should be kept in good condition. Replace any unreadable or damaged labels.
00831.0000
!
WARNING
Fill water tank before turning -on
thermostat or connecting appliance
to power source.
Use only on a properly protected
circuit capable of the rated load.
Electrically ground the chassis.
Follow national/local electrical codes.
Do not use near combustibles.
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE, OR SHOCK HAZARD
READ THE ENTIRE OPERATING MANUAL
BEFORE BUYING OR USING THIS PRODUCT
THIS APPLIANCE IS HEATED WHENEVER
CONNECTED TO A POWER SOURCE
00831.0000F 3/98 © 1988 BUNN-O-MATIC CORPORATION
00658.0000
02769.0000
Page 3
(Revised November 1999)
USER NOTICES (cont.)
00656.0000
This equipment is to be installed to
comply with the Basic Plumbing Code of
12744.0000
WARNING
HOT
WATER
the Building Officials and Code
Administrators International, Inc. (BOCA)
and the Food Service Sanitation Manual
of the Food and Drug Administration (FDA).
ELECTRICAL REQUIREMENTS
CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up.
WHITE
NEUTRAL
L1 BLACK
120V.A.C.
L2 RED
WHITE
NEUTRAL
120 V.A.C.
120 V.A.C.
208 or 240
Volts A.C.
L1 BLACK
MODEL 15 has an attached cordset, and requires 2-wire
grounded service rated 120 volts ac, 15 amp, single phase, 60
Hz.
MODEL 20 requires 2-wire, grounded service rated 120 volts
ac, 20 amp, single phase, 60 Hz. Proceed as follows:
MODEL35 requires 3-wire,
grounded service rated 120/208
or 120/240 volts ac, 20 amp,
single phase, 60 Hz. Proceed as
follows:
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. Remove the front panel beneath the sprayhead and rotate the control thermostat knob fully counterclockwise
to the “OFF” position.
4. Remove the rear panel, feed the cord through the strain relief at the rear of the brewer, and connect it to the
terminal block. Replace the rear panel.
5. Connect the brewer to the power source and verify the voltage at the terminal block before proceeding.
Replace the front panel.
6. If plumbing is to be hooked up later, make sure that the brewer is disconnected from the power source. If
plumbing has been hooked up, the brewer is ready for Initial Set-Up.
Page 4
(Revised November 1999)
PLUMBING REQUIREMENTS
This brewer must be connected to a cold water system with operating pressure greater than 10 psi 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 to reduce it to 50 psi. The water inlet fitting is 1/4" flare.
NOTE - Bunn-O-Matic recommends 1/4" copper tubing for installations of less than 25 feet from the 1/2" or larger
supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the counter
top. 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. Make certain that the 1/4" female flare fitting on the short tube from the outlet of the water strainer is securely
attached to the male bulkhead fitting on the brewer.
2. Flush the water line and securely attach it to the 1/4" flare fitting on the strainer.
3. Turn on the water supply.
INITIAL SETUP
CAUTION - The brewer must be disconnected from the power source throughout the initial setup, except when
specified in the instructions.
1. Remove the front panel from the brewer.
2. Rotate the control thermostat knob fully counterclockwise to the "OFF" position and replace the panel.
3. Insert an empty funnel into the funnel rails.
4. Place a decanter containing a small amount of water on the warmer beneath the brew funnel.
5. Connect the brewer to the power source and place the On/Lower switch in the upper position.
6. Momentarily press the start switch. Approximately 64 ounces of water will flow into the brew tank. T o fill the
tank, it will be necessary to start two more brew cycles. Place the On/Lower switch in the lower position
when water starts flowing form the funnel into the decanter.
7. Disconnect the brewer from the power source and remove the front panel.
8. Rotate the control thermostat knob fully clockwise to the "ON" position and replace the panel.
9. Connect the brewer to the power source 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 .
10. Place an empty decanter under the funnel.
11. Place the On/Lower switch in the upper position and momentarily press the start switch. Empty the decanter
after water has stopped flowing from the funnel and return it to the warmer.
12. Allow the water in the tank to reheat to the proper temperature.
13. Momentarily press the start switch. Check the water volume in the decanter after water has stopped flowing
from the funnel. It should be 64 ounces.
14. If not, disconnect the brewer from the power source and remove the top lid.
15. Add or remove washers to the float on the level switch as required and replace the top lid. Adding washers
increases the volume, removing washers decreases it.
16. Repeat steps 12-15 until the proper water volume is achieved.
17A. Model SL:
The brewer is now ready for use in accordance with the coffee brewing instructions on page 6.
17B. Model SLF:
Momentarily press the hot water dispense switch a few times to clear any air from the dispense lines.
18. Allow the tank to fully reheat.
Page 5
(Revised November 1999)
INITIAL SET-UP (cont.)
19. Press the hot water switch to dispense exactly 20 ounces of hot water and immediately start a brew cycle into
an empty graduated vessel.
20. Measure the brew water volume:
if it is more than the amount measured in #16, remove the rear panel, turn the needle valve slightly clockwise,
and replace the rear panel.
If it is less than the amount measured in #16, remove the rear panel, turn the needle valve slightly counterclockwise, and replace the rear panel.
21. Repeat steps 18-20 until the hot water refill rate is balanced with the dispense rate.
OPERATING CONTROLS
A. On/Lower Switch
Placing the switch in the upper position enables brewing and energizes the decanter warmer beneath the
funnel.
Placing the switch in the lower position cuts power to the warmer beneath the brew funnel and stops the
brew cycle. 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.
B. Top Warmer Switch
Placing the switch in the upper position energizes the top warmer.
Placing the switch in the lower position cuts power to the top warmer.
C. Start Switch
Momentarily pressing this switch initiates a brew cycle when the On/Lower switch is in the upper position.
D. Hot Water Dispense Switch (Model SLF only)
Placing the switch in the lower position dispenses hot water and at the same time refills the tank. Dispensing/refilling occurs for as long as the switch is held.
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. Disconnect the brewer from the power source. Remove the sprayhead and 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.
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.
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 an empty decanter under the brew funnel.
5. Place the On/Lower switch in the upper position and momentarily press the start switch.
6. When brewing is completed, simply discard the grounds and filter.
Page 6
(Revised November 1999)
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 electric components have 120 volt ac voltage on their terminals. Shorting of terminals or the application
of external voltages may result in equipment failure.
• Intermittent operation of electronic equipment is unlikely. Component 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 disconnected from the power source. Keep away from combustibles.
WARNING
• Exercise extreme caution when servicing electrical equipment.
• Disconnect the brewer from the power source when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
Problem
Equipment will not operate.
Brew cycle will not start.
Probable Cause
1. No power or incorrect voltage
1. No water
2. Water Strainer
3. Water Level Switch and Overflow
Safety Switch
Remedy
(A) Connect the brewer to the power
source.
(B) Check the terminal block for the
proper voltages.
(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 and check
for obstructions. Clear or replace.
Refer to Service - Water Level Switch
and Overflow Safety Switch for testing procedures. See page 23.
Page 7
(Added November, 1999)
TROUBLESHOOTING (cont.)
Problem
Brew cycle will not start. (cont.)
Water flows into fill basin continuously (On/Lower brew station
warmer switch "OFF").
Water flows into fill basin continuously (On/Lower brew station
warmer switch "ON").
Probable Cause
4. On/Lower Brew Station Warmer
Switch
5. Start Switch
6. Relay
7. Solenoid Valve
1. Solenoid Valve
1. Start Switch
Remedy
Refer to Service - On/Lower Brew
Station Warmer Switch for testing
procedures. See page 15.
Refer to Service - Start Switch for
testing procedures. See page 16.
Refer to Service - Relay for testing
procedures. See page 21.
Refer to Service - Solenoid Valve for
testing procedures. See page 17.
Refer to Service - Solenoid Valve for
testing procedures. See page 17.
Refer to Service - Start Switch for
testing procedures. See page 16.
Water is not hot.
Decanter warmer is not hot.
1. Limit Thermostat
CAUTION
Do not eliminate or bypass limit thermostat. Use only B.O.M. replacement part #29329.1000
2. Control Thermostat
3. Tank Heater
1. Warmer Switches
Refer to Service - Limit Thermostat
for testing procedures. See page 17.
Refer to Service - Control Thermostat for testing procedures. See
page 13.
Refer to Service - Tank Heater for
testing procedures. See page 22.
(A) The Warmer Switch(es) must be
in the "ON" position for the warmer
to operate.
(B) Refer to Service - Warmer
Switch(es) for testing procedures.
See pages 15.
2. Decanter Warmers
Page 8
Refer to Service - Warmers for testing procedures. See pages 14.
(Added November, 1999)
Loading...