®
BUNN
VP17
VP17B
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10860.0000 12/01 ©1996 Bunn-O-Matic Corporation
www.bunnomatic.com
INTRODUCTION
This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It 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 three 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 in this manual and on the equipment. All labels on the equipment should
be kept in good condition. Replace any unreadable or damaged labels.
#12364.0000
#00833.0000
Page 2
10860 061501
USER NOTICES (cont.)
# 00831.0000
# 00658.0000
#02763.0000
CAUTION
WARMERS AND SURFACES ARE HOT
POUR IN WATER ONLY
Page 3
10860 090800
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.
WHITE
NEUTRAL
L1 BLACK
100V.A.C.
P2185
"B" models require 2-wire,
grounded service rated 100 volts
ac, 20 amp, single phase, 50 Hz.
Proceed as follows:
Electrical Hook-Up (Model "B" Only)
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. Place the heater switch, located on the left front of the control panel on "B" Models, in the "OFF" (lower) position.
4. Remove the front panel beneath the sprayhead.
5. Feed the cord through the strain relief and connect it to the terminal block.
6. Connect the brewer to the power source and verify the voltage at the terminal block before proceeding. Replace
the front panel.
INITIAL SET-UP
CAUTION - The brewer must be disconnected from the power source throughout the initial set-up, except when
specified in the instructions.
1. Insert an empty funnel into the funnel rails.
2. Place an empty decanter under the funnel.
3. On "B" Models, place the heater switch of the brewer in the "OFF" (lower) position and connect the brewer to
the power source.
4. Pour three pitchers of tap water into the screened area on top of the brewer. Allow approximately two minutes
between pitchers for water to flow into the tank. While the third pitcher of water is entering the tank, the tank
will fill to capacity and the excess will flow from the sprayhead, out of the funnel, and into the dispenser.
5. When the flow of water from the funnel stops, place the heater switch of the brewer in the "ON" (upper) position
and wait approximately twenty minutes 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.
6. Pour one pitcher of tap water into the screened area on top of the brewer.
7. After water has stopped flowing from the funnel, allow the water in the tank to reheat to the proper temperature.
8. Empty the decanter. The brewer is now ready for use in accordance with the coffee brewing instructions.
Page 4
10860 061501
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 dispenser beneath the funnel.
5. Pour one pitcher of tap water into the screened area on top of the brewer.
6. When brewing is completed, simply discard the grounds and filter.
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.
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.
Page 5
10860 041797
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 brewer is heated at all times. 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
PROBLEM
Brew cycle will not start
Water is not hot
PROBABLE CAUSE
1. No water
2. No power or incorrect voltage to
the brewer
1. Tank Heater Switch (VP17B and
Early Model VP17)
2. Limit Thermostat
CAUTION - Do not eliminate or
bypass limit thermostat. Use only
replacement part #29329.1000
REMEDY
Check fill basin for obstructions.
(A1) Be sure the brewer is connected to the power source.
(A2) Check the terminal block for
100 volts on "B Series" brewers
across the white and black terminals.
(B) Check circuit breakers or fuses.
Refer to
Service
- Tank Heater
Switch for testing procedures. See
page 14
Refer to
Service
- Limit Thermostat for testing procedures. See
page 11
3. Control Thermostat
Page 6
Refer to
Service
- Control Thermostat for testing procedures. See
page 10
10860 061501
TROUBLESHOOTING (cont.)
PROBLEM
Water is not hot (cont.)
Inconsistent beverage level in dispenser
Spitting or excessive steaming
PROBABLE CAUSE
4. Tank Heater
1. Syphon System
2. 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. 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.
REMEDY
Refer to
Service
- Tank Heater for
testing procedures. See page 13
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for excessive lime deposits. Delime as
required.
Inspect tank assembly for excessive lime deposits. Delime as required.
Dripping from sprayhead
2. Control Thermostat
1. Syphon System
2. 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
- Control Thermostat for testing procedures. See
page 10
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for excessive lime deposits. Delime as
required.
Page 7
10860 090800
TROUBLESHOOTING (cont.)
PROBLEM
Beverage overflows dispenser
Weak beverage
PROBABLE CAUSE
1. Dispenser
1. Filter Type
2. Coffee Grind
3. Sprayhead
4. Funnel Loading
5. Water Temperature
REMEDY
The dispenser must be completely
empty before starting a brew cycle.
BUNN® paper filters must be used
for proper extraction.
A fine or drip grind must be used
for proper extraction.
A six-hole stainless steel sprayhead must be used for proper
extraction.
The BUNN® paper filter must be
centered in the funnel and the bed
of ground leveled by gentle shaking.
Place an empty funnel on an empty
dispenser beneath the sprayhead.
Initiate a brew cycle and check the
water temperature immediately below the sprayhead with a thermometer. The reading should not
be less than 195°F (91°C). Adjust
the control thermostat to increase
the water temperature. Replace if
necessary.
Dry coffee grounds remain in the
funnel
Brewer is making unusal noises
Cool beverage serving temperature
1. Funnel Loading
1. Tank Heater
1. ON/OFF Warmer Switch(s)
2. Warmer Element(s)
Page 8
The BUNN® paper filter must be
centered in the funnel and the bed
of grounds leveled by gently shaking.
Remove and clean lime off the
tank heater. See page 13
Refer to
Service
- ON/OFF Warmer
Switch for testing procedures. See
page 12
Refer to
Service -
Warmer Element for testing procedures. See
page 16
10860 090800
SERVICE
This section provides procedures for testing and
replacing various major components used in this
brewer 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 brewer should be unplugged
when servicing, except when electrical tests are required and the test procedure specifically states to
plug
in the brewer.
COMPONENT ACCESS
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replacement of any component.
All components are accessible by the removal of
the top cover and front inspection panel and warmer
assemblies.
for assistance in determining the
Contents
Control Thermostat............................................ 10
Limit Thermostat ............................................... 11
ON/OFF Switch................................................... 12
Tank Heater ....................................................... 13
Tank Heater Switch ............................................14
Warmer Elements ..............................................16
Wiring Diagrams................................................ 17
The top cover is attached with one #4-40 screw.
The front inspection panel is attached with four #632 screws.
The warmer assembly is attached with three #4-40
screws.
FIG. 1 COMPONENT ACCESS
P1160.40
Page 9
10860 090800
SERVICE (cont.)
CONTROL THERMOSTAT
P1161.40
FIG. 2 CONTROL THERMOSTAT
Location:
The control thermostat is located inside the trunk
on the left side of the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the blue
wire on the control thermostat and the white wire
on the tank heater. Connect the brewer to the
power source. The indication must be:
a) 100 volts ac for two wire 100 volt models.
b) 120 volts ac for two wire 120 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wiring Diagrams
and check the brewer wiring har-
ness.
6. Voltage must not be present when the thermostat
is turned to the "OFF" position.
7. Disconnect the brewer from the power source.
If voltage is present as described, reinstall the capillary
tube into the tank to the line 4.5" above the bulb, the
control thermostat is operating properly.
If voltage is not present as described, replace the
thermostat.
Removal and Replacement:
1. Remove wires from control thermostat leads.
2. Remove the thermostat capillary bulb by firmly
pulling up on the capillary at the tank lid. This will
disengage the grommet from the tank lid.
3. Remove the one #8-32 screw securing the control
thermostat to the component bracket in the trunk.
4. Slide the grommet to the line 4.5" above the bulb
on the new capillary tube.
5. Insert the capillary bulb through the hole in the
tank lid and press the grommet firmly and evenly
so that the groove in the grommet fits into the tank
lid.
6. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in the vertical position.
NOTE - The capillary tube must be clear of any electri-
cal termination and not kinked.
7. Using one #8-32 screw secure the control thermostat to the component bracket inside the trunk.
8. Refer to Fig. 3 when reconnecting the wires.
9. Adjust the control thermostat as required.
4. Gently remove the capillary bulb and grommet
from the tank.
5. With a voltmeter, check the voltage across the
black wire of the control thermostat and the white
wire on the tank heater when the control thermostat is turned "ON" (Fully clockwise). Connect the
brewer to the power source. The indication must
be:
a) 100 volts ac for two wire 100 volt models.
b) 120 volts ac for two wire 120 volt models.
Page 10
BLU to BLU Lead from
Limit Thermostat
BLK to BLK Lead from
Tank Heater
P1263
FIG. 3 CONTROL THERMOSTAT TERMINALS
10860 090800
SERVICE (cont.)
LIMIT THERMOSTAT
P1161.40
FIG. 4 LIMIT THERMOSTAT
Location:
The limit thermostat is located inside the rear of
the hood on the tank lid.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the blue and black wires from the limit
thermostat.
3. With an ohmmeter, check for continuity across the
limit thermostat terminals.
Removal and Replacement:
1. Remove all wires from limit thermostat terminals.
2. Carefully slide the limit thermostat out from under
the retaining clip and remove limit thermostat.
3. Carefully slide the new limit thermostat into the
retaining clip.
4. Refer to Fig. 5 when reconnecting the wires.
BLU to BLU Lead from
Control Thermostat
BLK to Terminal Block or Tank Heater Switch
P1800
FIG. 5 LIMIT THERMOSTAT TERMINALS
If continuity is present as described, the limit thermostat is operating properly.
If continuity is not present as described, replace the
limit thermostat.
Page 11
10860 061501
SERVICE (cont.)
ON/OFF WARMER SWITCH
ONE LOWER WARMER
TWO WARMERS
THREE WARMERS
If voltage is not present as described, refer to the
Wiring Diagrams
and check the brewer wiring har-
ness.
5. With the black wire removed, remove the wire
from the lower terminal.
6. Check for continuity across the center and lower
terminal with the switch in the "ON" (upper) position. Continuity must not be present when the
switch is in the "OFF" (lower) position.
If continuity is present as described, reconnect the
black wire to the center terminal and the remaining
wire to the lower terminal.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Remove front end cap.
3. Compress the clips inside the hood and gently
push the switch through the opening.
4. Push the new switch into the opening and spread
the clips to hold switch in the hood.
5. Reinstall front end cap.
6. Refer to Fig. 7 when reconnecting the wires.
P1166.40
FIG. 6 ON/OFF WARMER SWITCHES
Location:
The ON/OFF warmer switch(es) are located on the
front of the hood.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Viewing the switch from the back, remove the
white wire from the upper terminal and the black
wire from the center terminal.
3. With a voltmeter, check the voltage across the
white wire and the black wire. Connect the brewer
to the power source. The indication must be:
a) 100 volts ac for two wire 100 volt models.
b) 120 volts ac for two wire 120 volt models.
4. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the white
wire and proceed to #5.
WHI to Lower Warmer
BLK to Terminal Block
or Tank Heater Switch
Terminal #1 (See Chart
Below)
P1918
Connect wire to Terminal #1 as follows:
Lower Warmer ..................................................... WHI/RED
One Upper Warmer (Rear) ............................................ VIO
Two Upper or Side Warmers
(Front) ................................................................. BRN/BLK
(Rear) ........................................................................... VIO
FIG. 7 ON/OFF SWITCH TERMINALS
Page 12
10860 061501
SERVICE (cont.)
TANK HEATER
P1161.40
FIG. 8 TANK HEATER
Location:
The tank heater is located inside the tank and
secured to the tank lid.
Test Procedures:
1. Disconnect the brewer from the power supply.
2. With a voltmeter, check the voltage across the
black and white wires on the tank heater. Connect
the brewer to the power source. The indication
must be:
a) 100 volts ac for two wire 100 volt models.
b) 120 volts ac for two wire 120 volt models.
3. Disconnect the brewer from the power source.
2. Disconnect the black wire on the limit thermostat
from the tank heater switch and disconnect the
blue wire from the limit thermostat to the control
thermostat.
3. Disconnect the black wire and the white wire from
the tank heater terminals.
4. Remove sprayhead and the hex nut securing the
sprayhead tube to the hood. Set aside for reassembly.
5. Remove the eight #8-32 nuts securing the tank lid
to the tank.
6. Remove the tank lid with limit thermostat, sprayhead tube and tank heater
7 Remove the two hex nuts securing the tank heater
to the tank lid. Remove tank heater with gaskets
and discard.
8. Install new tank heater with gaskets on the tank lid
and secure with two hex nuts.
9. Install tank lid with limit thermostat, sprayhead
tube and tank heater using eight #8-32 hex nut.
10. Secure spayhead tube to hood using a hex nut.
11. Install sprayhead.
12. Reconnect the wires to the limit thermostat, tank
heater and control thermostat. See
stat
and
Control Thermostat
sections in this manual
Limit Thermo-
when reconnecting wires.
13. Install fill basin, secure with tank inlet fitting and
gasket.
14. Refer to Fig. 9 when reconnecting the tank heater
wires.
If voltage is present as described, proceed to #4
If voltage is not present as described, refer to the
Wiring Diagrams
and check wiring harness.
4. Disconnect the black wire and the white wire from
the tank heater terminals.
5. Check for continuity across the tank heater terminals.
If continuity is present as described, reconnect the
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.
NOTE- If the tank heater remains unable to heat,
remove and inspect heater for cracks in the sheath.
Removal and Replacement:
1. Remove the tank inlet fitting securing the fill basin
to the tank lid, remove fill basin and tank inlet
gasket. Set all three parts aside for reassembly.
Page 13
WHI to WHI Lead on
Power Cord (120V
Models)
WHI to Terminal Block
(White Insert) (100 V
Models)
FIG. 9 TANK HEATER TERMINALS
BLK to Control
Thermostat
P1163
10860 090800
SERVICE (cont.)
TANK HEATER SWITCH (VP17B and early model
VP17)
VP17 MODELS (Early Models)
VP17B MODELS
P1161.40
P1319.40
FIG. 10 TANK HEATER SWITCH
Location:
On Early VP17 Models the tank heater switch is
located on the rear of the brewer on the upper left side
of the trunk.
On VP17B Models the tank heater switch is located
on left side of the control panel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Disconnect the black wire from the limit thermo-
stat.
3. With a voltmeter, and with the tank heater switch
in the "ON" (upper) position check the voltage
between the black wire removed from the limit
thermostat and the white wire on the tank heater.
Connect the brewer to the power source. The
indication must be:
a) 100 volts ac on two wire 100 volt models.
b) 120 volts ac on two wire 120 volt models.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagrams
and check the brewer wiring har-
ness.
5. Check for continuity between the black wire removed from the limit thermostat and the black
insert on the terminal block, with the tank heater
switch in the "ON" (upper) position. Continuity
should not be present in the "OFF" (lower) position.
If continuity is present as described, the tank heater
switch is operating properly.
If continuity is not present as described, replace the
tank heater switch.
Removal and Replacement: (VP17)
1. Remove the tank inlet fitting securing fill basin to
the tank lid. Remove fill basin and gasket. Set all
three parts aside for reassembly.
2. Remove sprayhead and hex nut securing sprayhead tube to the hood. Set aside for reassembly.
3. Disconnect the wires on the limit thermostat and
the tank heater.
4. Gently pull the thermostat sensor and grommet
from the tank lid.
5. Insert a tube to the bottom of the tank and syphon
ALL of the water out.
6. Gently reinstall the thermostat sensor and grommet in the tank lid.
7. Remove the two #8-32 screws securing the tank
assembly to the hood.
8. Lift tank and components out as an assembly and
set aside for reassembly.
9. Disconnect the two black wires from the tank
heater switch.
10. Remove the plastic facenut, hex facenut and the
switch indicator/guard bracket that secures tank
heater switch to the brewer. Remove switch and
discard.
11. Insert new tank heater switch through the hole in
the upper left rear of the trunk and secure with
switch indicator/guard bracket, hex facenut and
plastic facenut.
12. Reconnect the two black wires the tank heater
switch terminals.
Page 14
10860 061501
SERVICE (cont.)
TANK HEATER SWITCH (cont.)
13. Set tank assembly inside the hood on mounting
brackets and secure with two #8-32 screws.
14. Reconnect the wires to the limit thermostat, tank
heater and the control thermostat. Refer to
Thermostat, Tank Heater
and
Control Thermostat
Limit
sections in this manual when reconnecting wires.
15. Secure the sprayhead tube to the hood using hex
nut.
16. Install sprayhead.
17. Install fill basin, inlet gasket and secure to tank lid
with tank inlet fitting.
18. Refer to Fig. 11 when reconnecting the wires.
Removal and Replacement: (VP17B)
1. Remove the tank inlet fitting securing fill basin to
the tank lid. Remove fill basin and gasket. Set all
three parts aside for reassembly.
2. Disconnect the two black wires from the tank
heater switch.
3. Remove the plastic facenut, hex facenut and the
switch indicator/guard bracket that secures tank
heater switch to the brewer. Remove switch and
discard.
4. Insert new tank heater switch through the hole in
the lower left of the control panel and secure with
swtich indicator/guard bracket, hex facenut and
plastic facenut.
5. Reconnect the two black wires the to the tank
heater switch terminals.
6. Install fill basin, inlet gasket and secure to tank lid
with tank inlet fitting.
7. Refer to Fig. 11 when reconnecting the wires.
BLK to Limit
Thermostat
BLK to Terminal
Block (Black Insert)
P1135
FIG. 11 TANK HEATER SWITCH TERMINALS
Page 15
10860 090800
SERVICE (cont.)
CAUTION
DISCARD DECANTER
IF:
. CRACKED
. SCRATCHED
. BOILED DRY
. HEATED
WHEN EMPTY
. USED ON HIGH FLAME
. OR EXPOSED ELE
CTRIC
ELEMENTS
FAILURE TO COMPLY RISKS INJURY
PN: 658
1985 BUNN-O-MATIC C
ORPORA
TION
FUNNEL CONTENTS
ARE HOT
WARMER ELEMENT(S)
If continuity is not present as described, replace the
warmer element.
Removal and Replacement:
1. Remove the three #4-40 screws securing the
warmer assembly to the brewer.
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D
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E
D
S
E
O
P
X
S
Y
E
T
R
N
E
U
M
N
J
E
IO
N
I
AT
R
S
O
K
P
R
S
O
I
C
R
IC
T
A
M
-
O
-
NN
U
B
R
P
O
T
R
E
W
O
L
2. Lift the warmer assembly from the brewer.
3. Disconnect the two wires from the warmer element terminals.
4. Remove the two #8-32 nuts securing the warmer
element to the warmer plate.
5. Securely install new warmer element.
6. Reconnect the two wires to warmer element terminals.
7. Securely install warmer assembly on the brewer.
8. Refer to the illustration below when reconnecting
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
the wires.
P1164
Location:
The warmer element(s) is located under the
warmer plate.
Test Procedures:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check voltage across the white
wire to the power cord and the white/red, brown/
black or violet wire to the "ON/OFF" switch, with the
"ON/OFF" switch in the "ON" (upper) position. The
indication must be:
a) 100 volts ac for two wire 100 volt models.
b) 120 volts ac for two wire 120 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to
Diagrams
and check brewer wiring harness.
Wiring
WHI/RED to ON/OFF Switch (One Lower Warmer)
BRN/BLK to ON/OFF Switch (to Front Warmer or
Side Warmer)
VIO to ON/OFF Switch (Top Rear Warmer or Rear
Side Warmer)
WHI to WHI Lead on Power Cord (120V Brewers)
WHI to Terminal Block (100V Brewers)
P1167
FIG. 13 WARMER ELEMENT TERMINALS
4. Check the continuity across the two terminals on
the warmer element.
If continuity is present as described, reconnect the
white wire and white/red, brown/black or violet wires
on the warmer element.
Page 16
10860 121101
SCHEMATIC WIRING DIAGRAM
L1
LIMIT
THERMOSTAT
BLK BLU
WHI
ON/OFF SWITCH
BLK
VP17-2 TOP WARMER ASSY
BLK
ON/OFF SWITCH
VP17-3 DUAL SIDE WARMER ASSY
WHI/RED
VIO WHI
BLK BRN/BLK
ON/OFF SWITCH
VP17-1/-2/-3
GRN
SW. & THERMOSTAT
TANK HEATER
BLK
1320W
50W
"KEEP WARM" HEATER
100W
LOWER WARMER
P3 P1
VIO
P2
BRN/BLK
100W
REAR WARMER
100W
FRONT WARMER
WHI
P1
N
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
P3
BLK
ON/OFF SWITCH
VIO
VIO
120 VOLTS AC 2 WIRE
SINGLE PHASE
10862.0003F 9/97 ©1997 BUNN-O-MATIC CORPORATION
100W
REAR WARMER
Page 17
10860 061501
L1
SCHEMATIC WIRING DIAGRAM
VP17-1/-2/-3
READY INDICATOR
BLU
BLK
GRN
N
HEATER
SWITCH
BLK BLU
BLK
BLK
WHI
BLK
2 TOP or SIDE WARMERS
LIMIT
THERMOSTAT
ON/OFF SWITCH
WHI/RED
1 TOP WARMER
BLK
ON/OFF SWITCH
BLK BRN/BLK
ON/OFF SWITCH
BLK VIO
ON/OFF SWITCH
VIO WHI
AUXILIARY OUTLET (NOT AVAILABLE ON VP17-3)
SW. & THERMOSTAT
TANK HEATER
BLK
"KEEP WARM" HEATER
LOWER WARMER
P3 P1
VIO
REAR WARMER
P2
BRN/BLK
P3
FRONT WARMER
VIO
REAR WARMER
WHI
P1
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHIBLK
120 VOLTS AC 2 WIRE
SINGLE PHASE
10862.0000B 9/00 ©1995 BUNN-O-MATIC CORPORATION
200 WATT MAXIMUM
Page 18
GRN
10860 061501
SCHEMATIC WIRING DIAGRAM
L1
HEATER
SWITCH
BLK BLU
BLK
BLK
WHI
BLK
1 TOP WARMER
BLK
2 TOP or SIDE WARMERS
BLK BRN/BLK
LIMIT
THERMOSTAT
ON/OFF SWITCH
ON/OFF SWITCH
ON/OFF SWITCH
VP17B-1/-2/-3
READY INDICATOR
BLU
SW. & THERMOSTAT
"KEEP WARM" HEATER
WHI/RED
VIO WHI
P3 P1
P2
BRN/BLK
VIO
BLK
TANK HEATER
BLK
LOWER WARMER
REAR WARMER
FRONT WARMER
GRN
WHI
P1
N
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
P3
BLK VIO
ON/OFF SWITCH
AUXILIARY OUTLET (NOT AVAILABLE ON VP17B-3)
VIO
100 VOLTS AC 2 WIRE
SINGLE PHASE
10862.0002F 9/00 ©1997 BUNN-O-MATIC CORPORATION
200 WATT MAXIMUM
REAR WARMER
WHIBLK
GRN
Page 19
10860 061501
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