Bunn VPR TC, VPR APS User Manual

579.32 Kb

VPR TC

VPR APS

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

39064.0000A 04/06 ©2006 Bunn-O-Matic Corporation

www.bunn.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.

Page 2

39064 042806

 

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.

#00658.0000

#00831.0000

#00833.0000

Page 3

#3788120000390643041806

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.

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.When the flow of water from the funnel stops, connect the brewer to the power source 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.

5.Empty the dispenser and replace it under the funnel.

6.Pour one pitcher of tap water into the screened area on top of the brewer.

7.When water has stopped flowing from the funnel let water in the tank reheat to the proper temperature.

8.Empty the dispenser. The brewer is now ready for use in accordance with the coffee brewing instructions below.

NOTE: The control thermostat will need to be adjusted downward to compensate for high altitudes. Refer to Steaming and spitting around the funnel on page 5 for instructions.

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 4

39064 042806

 

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.

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

Water is not hot

1. Limit Thermostat

Refer to Service - Limit Thermo-

 

CAUTION - Do not eliminate or

stat for testing procedures. See

 

bypass limit thermostat/thermal

page 10

 

cut-off. Use only BOM replace-

 

 

ment part.

 

 

Limit Thermostat - #29329.0001

 

 

2. Control Thermostat

Refer to Service - Control Ther-

 

 

mostat for testing procedures.

 

 

See page 9

 

3.

Tank Heater

Spitting or excessive steaming

1.

Lime Build-up

 

CAUTION - Tank and tank com-

 

ponents should be delimed

 

regularly depending on local

 

water conditions. Excessive min-

 

eral build-up on stainless steel

 

surfaces can initiate corrosive

 

reactions resulting in serious

 

leaks.

 

2.

Control Thermostat

Refer to Service - Tank Heater for testing procedures. See page 10

Inspect the tank assembly for excessive lime deposits. Delime as required.

Refer to Service - Control Thermostat for testing procedures. See page 9

Page 5

39064 042806

 

TROUBLESHOOTING (cont.)

 

PROBLEM

PROBABLE CAUSE

Dripping from sprayhead

1. Lime Build-up

 

CAUTION - Tank and tank com-

 

ponents should be delimed

 

regularly depending on local

 

water conditions. Excessive min-

 

eral build-up on stainless steel

 

surfaces can initiate corrosive

 

reactions resulting in serious

 

leaks.

REMEDY

Inspect the tank assembly for excessive lime deposits. Delime as required.

Beverage overflows dispenser

1. Dispenser

The dispenser must be com-

 

 

pletely empty before starting a

 

 

brew cycle.

Weak beverage

1. Filter Type

BUNN® paper filters must be used

 

 

for proper extraction.

 

2. Coffee Grind

A fine or drip grind must be used

 

 

for proper extraction.

 

3. Sprayhead

A six-hole stainless steel spray-

 

 

head must be used for proper

 

 

extraction.

 

4. Funnel Loading

The BUNN® paper filter must be

 

 

centered in the funnel and the

 

 

bed of grounds leveled by gentle

 

 

shaking.

 

5. Water Temperature

Place an empty funnel on an empty

 

 

dispenser beneath the sprayhead.

 

 

Pour-in a pitcher of tap water and

 

 

check the water temperature im-

 

 

mediately below the sprayhead

 

 

with a thermometer. The reading

 

 

should not be less than 195°F.

 

 

Adjust the control thermostat to

 

 

increase the water temperature.

 

 

Replace if necessary.

Page 6

39064 042806

 

TROUBLESHOOTING (cont.)

PROBLEM

Dry coffee grounds remain in the funnel

PROBABLE CAUSE

REMEDY

1. Funnel Loading

The BUNN® paper filter must be

 

centered in the funnel and the

 

bed of grounds leveled by gently

 

shaking.

Brewer is making unusal noises

1. Tank Heater

Remove and clean lime off the

 

 

tank heater. See page 10

Page 7

39064 042806

 

SERVICE

This section 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 disconnected from the power source 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 fill basin.

The top cover is attached with two #4-40 screws.

P2412-1

FIG. 1 COMPONENT ACCESS

The tank inlet fitting secures the fill basin to the tank lid.

 

P2413

FIG. 2 FILL BASIN REMOVAL

 

Contents

 

Control Thermostat ................................................

9

Limit Thermostat..................................................

10

Tank Heater .........................................................

10

Wiring Diagrams .................................................

12

CONTROL THERMOSTAT

P2414

FIG. 3 CONTROL THERMOSTAT

Page 8

39064 042806

 

SERVICE (cont.)

Location:

The control thermostat is located inside the hood on the left end of the mounting bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Locate the black wire on the control thermostat.

3.Check voltage across the black wire on the control thermostat and the white wire on the tank heater with a voltmeter. Plug-in the brewer to the power source. The indication must be 120 volts ac.

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 diagram and check the brewer wiring harness.

5.Locate the blue/black wire on the control thermostat.

6.Gently remove the capillary bulb and grommet from the tank.

7.Check voltage across the blue/black wire of the control thermostat and the white wire on the tank heater with a voltmeter when the control thermostat is turned "ON" (fully counterclockwise for thermostat with tee handle control or fully clockwise for thermostats with control knob). Plug-in the brewer to the power source. The indication must be 120 volts ac.

Voltage must not be present across these terminals when the thermostat is turned "OFF" (fully counterclockwise).

8.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 or terminals.

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.

BLK to Terminal Block

BLU/BLK to Limit Thermostat

or Thermal Cut-Off

P1252

FIG.4 CONTROL THERMOSTAT TERMINALS

3.Remove two #8-32 screws securing the control thermostat to the mounting bracket inside the hood.

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 electrical termination and not kinked.

7.Using two #8-32 screws secure the control thermostat to the mounting bracket inside the hood.

8.Refer to Fig. 4 when reconnecting the wires.

9.Adjust the control thermostat as required

Page 9

39064 042806

 

SERVICE (cont.)

LIMIT THERMOSTAT

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. 6 when reconnecting the wires.

TANK HEATER

P2414

FIG. 5 LIMIT THERMOSTAT

Location:

The limit thermostat is located inside the hood on the right side of the tank lid.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the blue/black and black wires from the limit thermostat.

3.Check for continuity across the limit thermostat terminals with an ohmmeter.

If continuity is present as described, the limit thermostat is operating properly.

If continuity is not present as described, replace the limit thermostat.

BLU/BLK to Control BLK to Tank Thermostat

Heater

P1800

FIG. 6 LIMIT THERMOSTAT TERMINALS

P2414

FIG. 7 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.Check voltage across the black and white wires with a voltmeter. Plug-in the brewer to the power source. The indication must be 120 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.

4.Disconnect the black wire and the white wire from the tank heater terminals.

5.Check for continuity across the tank heater terminals.

Page 10

39064 042806

 

SERVICE (cont.)

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 terminal block from the tank heater and disconnect the blue/black wire from the limit thermostat to the control thermostat.

3.Disconnect the black wire and the white 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.

7Remove 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 nuts.

10.Secure sprayhead 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. 8 when reconnecting the tank heater wires.

P1254

FIG. 8 TANK HEATER TERMINALS

Page 11

39064 042806

 

SCHEMATIC WIRING DIAGRAM

VPR, VPR TC & VPR APS

L1

 

GREEN

N

 

 

 

 

SW. & THERMOSTAT

LIMIT

 

 

 

THERMOSTAT

 

BLK

BLU/BLK

BLK

WHI

WHI

 

TANK HEATER

WHI

 

 

MODEL VPR ONLY

"KEEP WARM" HEATER

 

 

 

 

ON/OFF

 

 

 

SWITCH

 

WHI

 

 

 

BLK

WHI/RED

LOWER WARMER

WHI

 

 

ON/OFF

 

 

 

SWITCH

 

WHI

 

 

 

BLK

VIO

UPPER WARMER

WHI

 

120 VOLTS A C

 

2 WIRE

 

SINGLE PHASE

 

60 HZ

33769.0000C 03/06 © 2001 BUNN-O-MATIC CORPORATION

 

Page 12

39064 042806