Bunn VPS, VPR User Manual

BUNN®	VPR
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OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

OF CANADA LTD.

280 INDUSTRIAL PKWY. S.

AURORA, ONTARIO L4G 3T9

PHONE: [phone] FAX: [phone]

10053.7000J 11/01 ©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 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 [phone] or by writing to 280 Industrial Pkwy. S., Aurora Ontario L4G 3T9. 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	10053 073001

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.

#00831.0002

#00658.7000

#12364.7000

#00833.7001

Page 3	10053 022300

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.

“A" models require 2-wire, grounded service rated 220 - 240 volts ac, single phase, 50 Hz. Proceed as follows:

Electrical Hook-Up (Model "A" 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.Plug the power cord into the power connector located in the base on the rear of the brewer.

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

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

7.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	10053 101597

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
Water is not hot	1. Limit Thermostat or Thermal
	Cut-Off
	CAUTION - Do not eliminate or
	bypass limit thermostat/thermal
	cut-off. Use only BOM replace-
	ment part.
	Limit Thermostat - #29329.7000

REMEDY

Refer to Service - Limit Thermostat or Thermal Cut-Off for testing procedures. See page 10 or 13

2.	Control Thermostat	Refer to Service - Control Ther-
		mostat for testing procedures.
		See page 9
3.	Tank Heater	Refer to Service - Tank Heater
		for testing procedures. See page
		12

Spitting or excessive steaming	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 corro-
	sive reactions resulting in
	serious leaks.

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

	2. Control Thermostat	Refer to Service - Control Ther-
		mostat for testing procedures.
	Page 5	See page 9
		10053 022300

TROUBLESHOOTING (cont.)

PROBLEM

Dripping from sprayhead

Beverage overflows dispenser

Weak beverage

PROBABLE CAUSE

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.

1. Dispenser

1.Filter Type

2.Coffee Grind

3.Sprayhead

4.Funnel Loading

5.Water Temperature

REMEDY

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

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 grounds leveled by gentle shaking.

Place an empty funnel on an empty dispenser beneath the sprayhead. Pour-in a pitcher of tap water and check the water temperature immediately 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	10053 011597

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 shak-
	ing.

Brewer is making unusal noises	1.	Tank Heater	Remove and clean lime off the
			tank heater. See page 12
Cool beverage serving tempera-	1.	ON/OFF Warmer Switch	Refer to Service - ON/OFF
ture			Warmer Switch for testing
			procedures. See page 11
	2.	Warmer Element(s)	Refer to Service - Warmer
			Element(s) for testing proce-
			dures. See page 14

Page 7	10053 011597

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, fill basin and warmer assemblies.

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

P2413

FIG. 2 FILL BASIN REMOVAL

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

	Contents
Control Thermostat ............................................... 9
Limit Thermostat (VPR - VPS) ............................ 10
ON/OFF Switch (Warmers) ................................. 11
Tank Heater ....................................................... 12
Thermal Cut-Off (VPRA - VPSA) ......................... 13
Warmer Elements ............................................... 14
Wiring Diagrams ........................................ 15 & 16
VPR
P2412
VPS
P563
FIG. 1 COMPONENT ACCESS
Page 8	10053 073001

SERVICE (cont.)

CONTROL THERMOSTAT

P2414

FIG. 3 CONTROL THERMOSTAT

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 the voltage across the black wire on the control thermostat and the white wire on the tank heater or the red wire on the tank heater with a voltmeter. Plug-in the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)220 volts ac for two wire 220 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 harness.

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

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

7.Check the voltage across the blue/black wire of the control thermostat and the white wire on the tank heater or red 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:

a)120 volts ac for two wire 120 volt models.

b)220 volts ac for two wire 220 volt models. 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.

BLU to BLU/BLK Lead from Limit Thermostat

BLK to BLK Lead from

Terminal Block

EARLY MODELS

BLK to Terminal Block

BLU/BLK to Limit Thermostat

or Thermal Cut-Off

P1252

FIG.4 CONTROL THERMOSTAT TERMINALS

Page 9	10053 073001

SERVICE (cont.)

CONTROL THERMOSTAT (cont.)

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 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

LIMIT THERMOSTAT - VPR, VPS

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.

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.

BLU/BLK to Control BLK to Tank Thermostat

Heater

P1800

FIG. 6 LIMIT THERMOSTAT TERMINALS

P2414

FIG. 5 LIMIT THERMOSTAT

Location:

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

Page 10	10053 073001

	a) 120 volts ac for.two wire 120 volt models.
	RCordset			must	be:
	source.	The	indication
		3
	with	5
	the

voltage

2 2 3

3. With
11
wire from the switch terminal.	4 6
Pto 2. Viewing
P
1. Disconnect the brewer from the power source.
Test	52
	Procedure:
e
	Page 11
Lo
SEP
POURVWHI IN WATER ONLY

SERVICE (cont.)

TANK HEATER

P2414

FIG. 9 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 the voltage across the black and white wires on 120 volt models or the black and red wires for 220 volt models with a voltmeter. Plugin the brewer to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models.

b)220 volts ac for two wire 220 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.

4.Disconnect the black wire and the white wire or red 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 terminal block from the tank heater and disconnect the blue/ black wire from the limit thermostat or thermal cut-off to the control thermostat.

3.Disconnect the black wire and the white or red 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 or thermal cut-off, 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 or thermal cut-off, 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 or thermal cut-off, tank heater and control thermostat. See limit thermostat, thermal cut-off 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. 10 when reconnecting the tank heater wires.

Page 12	10053 073001

SERVICE (cont.)

TANK HEATER (Cont.)

BLK to Limit Thermostat (120V Models)

Thermal Cut-off to Blu/BLK Lead From

Control Thermostat (220V Two Wire

Models)

WHI to WHI Lead on Power Cord (120V Models) Thermal Cut-off to Red from Power Connector

(220V Two Wire Models)

P1254

FIG. 10 TANK HEATER TERMINALS

THERMAL CUT-OFF - VPRA, VPSA

FIG. 11 THERMAL CUT-OFF	P1270

Location:

The thermal cut-outs are located inside the hood connected to the tank heater terminals.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the thermal cut-off from the tank heater and the red wire from the power connector.

3.Check for continuity across the thermal cut-off terminals with an ohmmeter.

If continuity is present as described, the thermal cutoff is operating properly.

If continuity is not present as described, replace the thermal cut-off.

4.Disconnect the thermal cut-off from the tank heater and blue/black from the control thermostat.

5.Check for continuity across the thermal cut-off terminals with an ohmmeter.

If continuity is present as decribed, the thermal cut-off is operating properly.

If continuity is not present as described, replace the thermal cut-off.

Removal and Replacement:

1.Disconnect the thermal cut-off from the tank heater and the red wire from the power connector or the blue/black wire from the control thermostat.

2.Install new thermal cut-off.

3.Refer to Fig. 12 when reconnecting wires.

		Thermal Cut-off from Tank
Thermal Cut-off from Tank		Heater to Red Lead from
Heater to BLU/BLK Lead		Power Connector
from Control Thermostat

VPRA - VPSA

P1269

FIG. 12 THERMAL CUT-OFF TERMINALS

Page 13	10053 073001

SERVICE (cont.)

WARMER ELEMENTS

WHI /RED, VIO or BRN/BLK to ON/OFF Switch

WHI to WHI Lead on Power Cord (120V Brewers)

RED to Power Connector (220V Brewers)

FIG. 14 WARMER ELEMENT TERMINALS P1255

Page 14

RTLocation:FIGPestmovalandReplacement:.Procedures:

SCHEMATIC WIRING DIAGRAM VPR

	(Prior to Serial # VPR0270000)				GREEN
	L1					N
	SW. & THERMOSTAT		LIMIT
	BLK		THERMOSTAT		1150W	WHI
		BLU/BLK		BLK
					TANK HEATER
	ON/OFF	WHI/RED	IND			WHI
	SWITCH
	BLK	WHI/RED			100W	WHI
	ON/OFF	VIO	IND	LOWER WARMER		WHI
	SWITCH				100W
	BLK	VIO				WHI
				UPPER WARMER
	120 VOLTS A C
	2 WIRE	10050.0000D 1/97 © 1988		BUNN-O-MATIC CORPORATION
	SINGLE PHASE
	60 HZ

SCHEMATIC WIRING DIAGRAM VPR

	(Serial # VPR0270000 & up)
L1		GREEN	N
	SW. & THERMOSTAT	LIMIT
		THERMOSTAT
BLK	BLU/BLK	BLK	WHI
WHI		TANK HEATER	WHI
	ON/OFF	"KEEP WARM" HEATER
	SWITCH		WHI
BLK	WHI/RED		WHI
	ON/OFF	LOWER WARMER
	SWITCH		WHI
BLK	VIO		WHI

UPPER WARMER

120 VOLTS A C

2 WIRE

33769.0000A 02/01 © 2001 BUNN-O-MATIC CORPORATION

SINGLE PHASE

60 HZ

Page 15	10053 073001

	SCHEMATIC WIRING DIAGRAM VPS
L1						GREEN	N
	SW. & THERMOSTAT		LIMIT
			THERMOSTAT			1150W
BLK		BLU/BLK			BLK		WHI
						TANK HEATER
	ON/OFF	WHI/RED	IND				WHI
	SWITCH
BLK		WHI/RED				100W	WHI
	ON/OFF	VIO	IND	LOWER LEFT WARMER			WHI
	SWITCH
						100W
BLK		VIO					WHI
	ON/OFF	BRN/BLK	IND		UPPER WARMER		WHI
	SWITCH
BLK		BRN/BLK				100W	WHI
				LOWER RIGHT WARMER

120 VOLTS A C

2 WIRE

SINGLE PHASE

60 HZ

10049.0000C 1/97 © 1988 BUNN-O-MATIC CORPORATION

L1	SCHEMATIC WIRING DIAGRAM				L2
		VPRA		GRN/YEL
	IND
	BLK				RED
	SW. & THERMOSTAT		THERMAL	THERMAL
			CUT-OFF	CUT-OFF
	BLK	BLU/BLK		2000W	RED
				TANK HEATER
	ON/OFF	WHI/RED	IND		RED
	SWITCH
	BLK	WHI/RED		100W	RED
	ON/OFF	VIO	IND	LOWER WARMER	RED
	SWITCH
	BLK	VIO		100W	RED
				UPPER WARMER

220 VOLTS A C

2 WIRE

SINGLE PHASE

Page 16	10053 073001

L1	SCHEMATIC WIRING DIAGRAM					L2
		VPSA			GRN/YEL
	IND
	BLK					RED
	SW. & THERMOSTAT		THERMAL		THERMAL
			CUT-OFF		CUT-OFF
	BLK	BLU/BLK			2000W	RED
					TANK HEATER
	ON/OFF	WHI/RED	IND			RED
	SWITCH
	BLK	WHI/RED			100W	RED
	ON/OFF	VIO	IND	LOWER LEFT WARMER		RED
	SWITCH				100W
	BLK	VIO				RED
	ON/OFF	BRN/BLK	IND		UPPER WARMER	RED
	SWITCH
	BLK	BRN/BLK			100W	RED
				LOWER RIGHT WARMER

220 VOLTS A C

2 WIRE

SINGLE PHASE

Page 17	10053 073001