VP17
Series
SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the Operating Manual, Illustrated Parts Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at www.bunn.com.
This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates.
For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
46721.0000B 09/17 ©2012 Bunn-O-Matic Corporation
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCR/MCP/MCA single cup brewers, thermal servers and ThermoFresh® servers (mechanical and digital) 1 year parts and 1 year labor.
2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts and
labor for 4 years or 40,000 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, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. 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.
392, A Partner You Can Count On, Air Infusion, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with
the stylized red line, BUNNlink, Bunn-OMatic, Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design,
Cool Froth, DBC, Dr. Brew stylized Dr. design, Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet
Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment
Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com,
Scale-Pro, Silver Series, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in
Beverage Equipment Worldwide, ThermoFresh, Titan, trifecta, TRIFECTA (sylized logo), Velocity Brew, Air Brew, Beverage
Bar Creator, Beverage Profit Calculator, Brew better, not bitter., Build-A-Drink, BUNNSource, Coffee At Its Best, Cyclonic
Heating System, Daypart, Digital Brewer Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, Picture
Prompted Cleaning, Pouring Profits, Signature Series, Sure Tamp, Tea At Its Best, The Horizontal Red Line, Ultra are either
trademarks or registered trademarks of Bunn-O-Matic Corporation. The commercial trifecta® brewer housing configuration is a trademark of Bunn-O-Matic Corporation.
Page 2
46721 031314
SERVICE
Contents
This manual provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
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.
Control Thermostat............................................... 4
Limit Thermostat................................................... 5
ON/OFF Switch...................................................... 6
Tank Heater........................................................... 7
Tank Heater Switch............................................... 8
Warmer Elements............................................... 10
Wiring Diagrams................................................. 11
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.
The top cover is attached with one #4-40 screw.
The front inspection panel is attached with four #6-32
screws.
The warmer assembly is attached with three #4-40
screws.
FIG. 1 COMPONENT ACCESS
Page 3
P1160.40
46721 052512
SERVICE (cont.)
7. Disconnect the brewer from the power source.
CONTROL THERMOSTAT
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.
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.
NOTE - The capillary tube must be clear of any electrical termination and not kinked.
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 harness.
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.
6. Voltage must not be present when the thermostat
is turned to the "OFF" position.
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.
BLU to BLU Lead from
Limit Thermostat
BLK to BLK Lead from
Tank Heater
P1263
FIG. 3 CONTROL THERMOSTAT TERMINALS
Page 4
46721 052512
SERVICE (cont.)
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.
LIMIT THERMOSTAT
FIG. 4 LIMIT THERMOSTAT
BLU to BLU Lead from
Control Thermostat
P1161.40
Location:
The limit thermostat is located inside the rear of
the hood on the tank lid.
BLK to Terminal Block or Tank Heater Switch
P1800
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.
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 5
46721 052512
SERVICE (cont.)
ON/OFF WARMER SWITCH
If voltage is not present as described, refer to the Wiring
Diagrams and check the brewer wiring harness.
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.
ONE LOWER WARMER
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.
TWO WARMERS
THREE WARMERS
P1166.40
FIG. 6 ON/OFF WARMER SWITCHES
Location:
The ON/OFF warmer switch(es) are located on the
front of the hood.
WHI to Lower Warmer
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.
Terminal #1 (See Chart
Below)
BLK to Terminal Block
or Tank Heater Switch
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
If voltage is present as described, reconnect the white
wire and proceed to #5.
Page 6
46721 052512
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.
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.
WHI to WHI Lead on
Power Cord (120V
Models)
WHI to Terminal Block
(White Insert) (100 V
Models)
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.
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 Limit Thermostat and Control Thermostat sections in this
manual 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.
BLK to Control
Thermostat
FIG. 9 TANK HEATER TERMINALS
Page 7
P1163
46721 052512
SERVICE (cont.)
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 harness.
TANK HEATER SWITCH (VP17B and early model
VP17)
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.
VP17 MODELS (Early Models)
VP17B MODELS
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.
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 thermostat.
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.
Page 8
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.
46721 052512
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 Limit
Thermostat, Tank Heater and Control Thermostat 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.
BLK to Limit Thermostat
BLK to Terminal
Block (Black Insert)
P1135
FIG. 11 TANK HEATER SWITCH TERMINALS
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.
Page 9
46721 052512
SERVICE (cont.)
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.
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
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 Wiring
Diagrams and check brewer wiring harness.
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)
FIG. 13 WARMER ELEMENT TERMINALS
P1167
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 10
46721 052512
SCHEMATIC WIRING DIAGRAM
VP17-1/-2/-3
GRN
L1
LIMIT
THERMOSTAT
BLK
N
SW. & THERMOSTAT
BLU
BLK
TANK HEATER
WHI
1320W
50W
WHI
ON/OFF SWITCH
BLK
WHI
"KEEP WARM" HEATER
WHI
WHI/RED
WHI
LOWER WARMER
VP17-2 TOP WARMER ASSY
BLK
VIO
WHI
P3
WHI P1 WHI
VIO
REAR WARMER
ON/OFF SWITCH
VP17-3 2 SIDE WARMERS
BLK
BRN/BLK
WHI
NOT USED ON LATE MODELS
WITH SIDE WARMERS
BRN/BLK
FRONT WARMER
ON/OFF SWITCH
BLK
VIO
WHI
WHI
VIO
REAR WARMER
ON/OFF SWITCH
120 VOLTS AC
2 WIRE + GND
SINGLE PHASE
WHI
10862.0003H 09/06 ©1997 BUNN-O-MATIC CORPORATION
Page 11
46721 052512
SCHEMATIC WIRING DIAGRAM
VP17-1/-2/-3
L1
READY INDICATOR
BLU
HEATER
SWITCH
BLK
BLK
LIMIT
THERMOSTAT
BLK
SW. & THERMOSTAT
BLU
BLK
TANK HEATER
WHI
"KEEP WARM" HEATER
WHI/RED
BLK
WHI
WHI
VIO
P3
WHI P1 WHI
VIO
REAR WARMER
ON/OFF SWITCH
2 TOP or SIDE WARMERS
BRN/BLK
WHI
P2 BRN/BLK
FRONT WARMER
ON/OFF SWITCH
VIO
BLK
WHI
LOWER WARMER
1 TOP WARMER
BLK
WHI
WHI
ON/OFF SWITCH
BLK
N
GRN
BLK
P3
WHI P1 WHI
WHI
VIO
REAR WARMER
ON/OFF SWITCH
AUXILIARY OUTLET (NOT AVAILABLE ON VP17-3)
BLK
120 VOLTS AC 2 WIRE
SINGLE PHASE
WHI
GRN
200 WATT MAXIMUM
10862.0000B 9/00 ©1995 BUNN-O-MATIC CORPORATION
Page 12
46721 052512
SCHEMATIC WIRING DIAGRAM
VP17B-1/-2/-3
L1
READY INDICATOR
BLU
HEATER
SWITCH
BLK
BLK
LIMIT
THERMOSTAT
BLK
BLK
SW. & THERMOSTAT
BLU
BLK
TANK HEATER
WHI
WHI
WHI
ON/OFF SWITCH
BLK
N
GRN
"KEEP WARM" HEATER
WHI
WHI/RED
WHI
LOWER WARMER
1 TOP WARMER
WHI
BLK
VIO
P3
WHI P1 WHI
VIO
REAR WARMER
ON/OFF SWITCH
2 TOP or SIDE WARMERS
WHI
NOT USED ON LATE MODELS
WITH SIDE WARMERS
BLK
BRN/BLK P2 BRN/BLK
FRONT WARMER
ON/OFF SWITCH
BLK
VIO
P3
WHI P1 WHI
WHI
VIO
REAR WARMER
ON/OFF SWITCH
AUXILIARY OUTLET (NOT AVAILABLE ON VP17-3)
WHI
BLK
100 VOLTS AC
2 WIRE + GND
SINGLE PHASE
GRN
200 WATT MAXIMUM
(EARLY MODELS ONLY)
10862.0002G 09/06 ©1997 BUNN-O-MATIC CORPORATION
Page 13
46721 052512
L2
RED
BLK
L1
MAIN ON/OFF SWITCH
(Late Models only)
BLK
2 TOP or SIDE WARMERS
NOT USED ON LATE MODELS
WITH SIDE WARMERS
220-240 VOLTS AC
2 WIRE + GND
SINGLE PHASE
10862.0001L 01/07 ©1995 BUNN-O-MATIC CORPORATION
Page 14
46721 052512
Page 15
46721 052512
Page 16
46721 052512