Bunn Coffeemaker VP17A User Manual

®
BUNN  
VP17A  
OPERATING & SERVICE MANUAL  
BUNN-O-MATIC CORPORATION  
POST OFFICE BOX 3227  
SPRINGFIELD, ILLINOIS 62708-3227  
PHONE: (217) 529-6601 FAX: (217) 529-6644  
10860.0001C 9/00 ©1997 Bunn-O-Matic Corporation  
USER NOTICES (cont.)  
# 00658.0000  
#00831.0000  
# 02763.0000  
10860.1 091300  
Page 3  
ELECTRICAL REQUIREMENTS  
CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up.  
The brewer requires 2-wire, grounded service rated 220 - 240 volts ac, 20 amp,  
single phase, 50 Hz. An all pole disconnect means must be incorporated in the fixed  
wiring according to local wiring regulations. 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.  
4. Feed the cord through the strain relief and connect it to the terminal block.  
5. Connectthebrewertothepowersourceandverifythevoltageattheterminalblockbeforeproceeding. 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 dispenser under the funnel.  
3. 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.  
4. Connect the brewer to the power source.  
5. When the flow of water from the funnel stops, 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. Empty the dispenser and pour one pitcher of tap water into the screened area on top of the brewer.  
7. After water has stopped flowing from the funnel, let the water in the tank reheat to the proper temperature.  
8. Emptythedispenser.Thebrewerisnowreadyforuseinaccordancewiththecoffeebrewinginstructionsbelow.  
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.  
10860.1 071598  
Page 4  
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.  
10860.1 071598  
Page 5  
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, andrepairofelectricalequipmentshouldbeperformedonlybyqualifiedservicepersonnel.  
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  
PROBABLE CAUSE  
REMEDY  
Brew cycle will not start  
Water is not hot  
1. No water  
Check fill basin for obstructions.  
1.Thermal Cut-Off  
CAUTION - Do not eliminate or  
bypass thermal cut-offs.  
Refer to Service - Thermal Cut-Off  
for testing procedures. See page  
13  
2. Control Thermostat  
RefertoService -ControlThermo-  
stat for testing procedures. See  
page 10  
3. Tank Heater  
Refer to Service - Tank Heater for  
testing procedures. See page 12  
Inconsistent beverage level in dis-  
penser  
1. Syphon System  
Thebrewermustbelevelorslightly  
lower in front to syphon properly.  
2. Lime Build-up  
Inspect the tank assembly for ex-  
cessive lime deposits. Delime as  
required.  
CAUTION - Tank and tank compo-  
nents should be delimed regularly  
depending on local water condi-  
tions. Excessive mineral build-up  
onstainlesssteelsurfacescanini-  
tiate corrosive reactions resulting  
in serious leaks.  
10860.1 091300  
Page 6  
TROUBLESHOOTING (cont.)  
PROBLEM  
PROBABLE CAUSE  
REMEDY  
Spitting or excessive steaming  
1. Lime Build-up  
Inspect tank assembly for exces-  
sive lime deposits. Delime as re-  
quired.  
CAUTION - Tank and tank compo-  
nents should be delimed regularly  
depending on local water condi-  
tions. Excessive mineral build-up  
onstainlesssteelsurfacescanini-  
tiate corrosive reactions resulting  
in serious leaks.  
2. Control Thermostat  
Refer to Service - Control Ther-  
mostatfortestingprocedures.See  
page 10  
Dripping from sprayhead  
1. Syphon System  
Thebrewermustbelevelorslightly  
lower in front to syphon properly.  
2. Lime Build-up  
Inspect the tank assembly for ex-  
cessive lime deposits. Delime as  
required.  
CAUTION - Tank and tank compo-  
nents should be delimed regularly  
depending on local water condi-  
tions. Excessive mineral build-up  
onstainlesssteelsurfacescanini-  
tiate corrosive reactions resulting  
in serious leaks.  
1. Dispenser  
1. Filter Type  
2. Coffee Grind  
3. Sprayhead  
Thedispensermustbecompletely  
emptybeforestartingabrewcycle.  
Beverage overflows dispenser  
Weak beverage  
BUNN® paperfiltersmustbeused  
for proper extraction.  
A fine or drip grind must be used  
for proper extraction.  
A six-hole stainless steel spray-  
head must be used for proper  
extraction.  
10860.1 091300  
Page 7  
TROUBLESHOOTING (cont.)  
PROBLEM  
PROBABLE CAUSE  
REMEDY  
The BUNN® paper filter must be  
centered in the funnel and the bed  
ofgroundsleveledbygentleshak-  
ing.  
Weak beverage (cont.)  
4. Funnel Loading  
5. Water Temperature  
Placeanemptyfunnelonanempty  
dispenser beneath the sprayhead.  
Initiate a brew cycle and check the  
watertemperatureimmediatelybe-  
low the sprayhead with a ther-  
mometer. The reading should not  
be less than 195°F (91˚C). Adjust  
the control thermostat to increase  
the water temperature. Replace if  
necessary.  
The BUNN® paper filter must be  
centered in the funnel and the bed  
ofgroundsleveledbygentlyshak-  
ing.  
Dry coffee grounds remain in the  
funnel  
1. Funnel Loading  
Brewer is making unusal noises  
1. Tank Heater  
Remove and clean lime off the  
tank heater. See page 12  
Cool beverage serving tempera-  
ture  
1. ON/OFF Warmer Switch(s)  
RefertoService-ON/OFFWarmer  
Switchfortestingprocedures.See  
page 11  
2. Warmer Element(s)  
Refer to Service - Warmer Ele-  
ment for testing procedures. See  
page 14  
10860.1 091300  
Page 8  
Contents  
SERVICE  
This section provides procedures for testing and  
Control Thermostat............................................. 10  
ON/OFF Warmer Switch ...................................... 11  
Tank Heater ....................................................... 12  
Thermal Cut-Offs ................................................ 13  
Warmer Elements ............................................... 14  
Wiring Diagrams................................................. 15  
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 electri-  
cal equipment should be performed only by qualified  
service personnel. The brewer should be unplugged  
when servicing, except when electrical tests are re-  
quired 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 replace-  
ment of any component.  
All components are accessible by the removal of  
the top cover, front inspection panel and warmer  
assemblies.  
The top cover is attached with one #4-40 screw.  
Thefrontinspectionpanelisattachedwithfour#6-  
32 screws.  
P1264  
FIG. 1 COMPONENT ACCESS  
10860.1 091300  
Page 9  
SERVICE (cont.)  
7. Voltage must not be present when the thermostat  
is turned to the "OFF" position.  
CONTROL THERMOSTAT  
Ifvoltageispresentasdescribed,reinstallthecapillary  
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.  
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 inside 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  
andbulbinsidethetankareintheverticalposition.  
P1262  
FIG. 2 CONTROL THERMOSTAT  
Location:  
The control thermostat is located inside the trunk  
on the upper left side of the component bracket.  
NOTE - The capillary tube must be clear of any electri-  
cal termination and not kinked.  
Test Procedures:  
1. Disconnect the brewer from the power source.  
2. Withavoltmeter,checkthevoltageacrosstheblue  
wire on the control thermostat and red insert on  
terminal block. Connect the brewer to the power  
source. The indication must be 220 to 240 volts.  
3. Disconnect the brewer from the power source.  
7. Usingone#8-32screwsecurethecontrolthermo-  
stat to the component bracket inside the trunk.  
8. Refer to Fig. 3 when reconnecting the wires.  
9. Adjust the control thermostat as required.  
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.  
BLK or RED to Thermal Cut-Off  
4. Gently remove the capillary bulb and grommet  
from the tank.  
BLU to Terminal Block/Tank  
Heater Switch  
5. With a voltmeter, check the voltage across the  
black wire of the control thermostat and the red  
insert on the terminal block, when the control  
thermostat is turned "ON" (Fully clockwise). Con-  
nect the brewer to the power source. The indica-  
tion must be 220 to 240 volts ac.  
P1263  
FIG. 3 CONTROL THERMOSTAT TERMINALS  
6. Disconnect the brewer from the power source.  
10860.1 091300  
Page 10  
SERVICE (cont.)  
If voltage is present as described, reconnect the red  
wire and proceed to #5.  
ON/OFF WARMER SWITCH  
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) posi-  
tion. Continuity must not be present when the  
switch is in the "OFF" (lower) position.  
ONE WARMER  
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.  
TWO WARMERS  
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. 5 when reconnecting the wires.  
THREE WARMERS  
P1166.45  
FIG. 4 ON/OFF WARMER SWITCH  
Location:  
RED to Terminal Block  
(Red Insert)  
The ON/OFF warmer switch(s) are located on the  
front of the hood.  
BLK to Terminal Block  
(Black Insert)  
Test Procedure:  
Terminal #1 (See Chart  
Below)  
1. Disconnect the brewer from the power source.  
2. Viewing the switch from the back, remove the red  
wire from the upper terminal and the black wire  
from the center terminal.  
3. With a voltmeter, check the voltage across the red  
wire and the black wire. Connect the brewer to the  
power source. The indication must be 220 to 240  
volts ac.  
Connect wire to Terminal #1 as follows:  
Lower Warmer.................................................. WHI/RED  
Rear Warmer ............................................................. VIO  
Front Warmer ................................................... BRN/BLK  
P1918  
FIG. 5 ON/OFF WARMER SWITCH TERMINALS  
4. Disconnect the brewer from the power source.  
10860.1 091300  
Page 11  
4. Remove sprayhead and the hex nut securing the  
sprayhead tube to the hood. Set aside for reas-  
sembly.  
SERVICE (cont.)  
TANK HEATER  
5. Remove the eight #8-32 nuts securing the tank lid  
to the tank.  
6. Remove the tank lid with 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. Installtanklidwithsprayheadtubeandtankheater  
using eight #8-32 hex nut.  
10. Secure sprayhead tube to hood using a hex nut.  
11. Install sprayhead.  
12. Reconnect the thermal cut-offs to the tank heater  
terminals.  
13. Slide the grommet to the line 4.5" above the  
capillary bulb.  
14. 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.  
15. Carefully bend the capillary tube so that the tube  
andbulbinsidethetankareintheverticalposition.  
NOTE - The capillary tube must be clear of any electri-  
cal termination and not kinked.  
P1262  
FIG. 6 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 red wire. Connect the brew to the power  
source. The indication must be 220 to 240 volts  
ac.  
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.  
16. Install fill basin, secure with tank inlet fitting and  
gasket.  
17. Refer to Fig.7 when reconnecting the tank heater  
wires.  
4. Disconnect the thermal cut-offs from the tank  
heater terminals.  
5. Check for continuity across the tank heater termi-  
nals.  
If continuity is present as described, reconnect the  
thermalcut-offs, thetankheaterisoperatingproperly.  
If continuity is not present as described, replace the  
tank heater.  
Thermal Cut-Off & BLK  
Thermal Cut-Off & WHI  
Lead on Ready Light  
Lead from Tank  
Harness  
Warmer Blanket  
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. Disconnectthethermalcut-offwithblanketwarmer  
lead (white) and thermal cut-off with ready light  
harness lead (black) from the tank heater termi-  
nals.  
3. 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.  
P1163  
FIG. 7 TANK HEATER TERMINALS  
10860.1 071598  
Page 12  
SERVICE (cont.)  
Removal and Replacement:  
THERMAL CUT-OFFS  
1. Disconnect the thermal cut-off from the terminal  
on the black lead from ready light harness and the  
black lead from the control thermostat or the tank  
heater terminal and the red lead from the main  
harness.  
2. Remove the white lead from the tank "keep warm"  
heater from the thermal cut-off terminal.  
3. Install new thermal cut-off.  
4. Refer to Fig. 9 when reconnecting wires.  
BLK Lead  
BLK Lead from  
Control Thermostat  
P1262  
Thermal Cut-Off  
Thermal Cut-Off  
FIG. 8 THERMAL CUT-OFFS  
RED Lead from  
Main Harness  
BLK Lead from  
Ready Light  
Harness  
Location:  
WHI from "Keep Warm"  
Heater  
The thermal cut-offs are located inside the hood  
connected to the tank heater terminals.  
Tank Heater Terminals  
P1389  
Test Procedures:  
FIG.9 THERMAL CUT-OFF TERMINALS  
1. Disconnect the brewer from the power source.  
2. Disconnect the thermal cut-off from the terminal  
on the black lead of the ready light wiring harness.  
3. Withanohmmeter,checkforcontinuityacrossthe  
thermal cut-off terminals.  
If continuity is present as described, the thermal cut-  
off is operating properly.  
If continuity is not present as described, replace the  
thermal cut-off.  
4. Disconnectthethermalcut-offfromthetankheater  
termnal and the red lead from the main wiring  
harness.  
5. Check for continuity across the thermal cut-off  
terminals.  
If continuity is present as described, the thermal cut-  
off is operating properly.  
If continuity is not present as described, replace the  
thermal cut-off.  
10860.1 071598  
Page 13  
SERVICE (cont.)  
WARMER ELEMENT(S)  
wire, andred/white, brown/blackor violetwiresonthe  
warmer element.  
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 ele-  
ment terminals.  
4. Remove the two #8-32 nuts securing the warmer  
element to the warmer plate.  
5. Securly install new warmer element.  
6. Reconnect the two wires to the warmer element  
terminals.  
7. Securly install warmer assembly on the brewer.  
8. Refer to Fig. 11 when reconnecting the wires.  
P1164  
FIG. 10 WARMER ELEMENTS  
Location:  
The warmer element(s) is located under the  
warmer plate.  
WHI/RED to ON/OFF Switch  
BRN/BLK to ON/OFF Switch  
VIO to ON/OFF Switch  
Test Procedures:  
1. Disconnect the brewer from the power source.  
2. Withavoltmeter,checkvoltageacrosstheredwire  
to the terminal block and white/red, brown/black  
or violet wire to the "ON/OFF" switch, with the "ON/  
OFF" switch in the "ON" (upper) position. Connect  
the brewer to the power source. The indication  
must be 220 to 240 volts ac  
RED to Terminal Block  
3. Disconnect the brewer from the power source.  
P1167  
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.  
FIG. 11 WARMER ELEMENT TERMINALS  
4. Remove the three #4-40 screws securing the  
warmer assembly to the brewer.  
5. Lift the warmer assembly from the brewer.  
6. Disconnect the two wires from the warmer ele-  
ment terminals.  
7. Check the continuity across the two terminals on  
the warmer element.  
If continuity is present as described, reconnect the red  
10860.1 091300  
Page 14  
10860.1 091300  
Page 15  
10860.1 091300  
Page 16  
10860.1 091300  
Page 17  

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