Bunn 1SH & 2SH STAND User Manual

1SH & 2SH STAND

OPERATING & SERVICE MANUAL

BUNN-O-MATICCORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: [phone]FAX: [phone]

To obtain the Illustrated Parts Catalog, visit the Bunn-O-Maticwebsite, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the catalog. ContactBunn-O-MaticCorporation at1-800-286-6070to obtain a paper copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.

28342.0000E 02/07 ©1997 Bunn-O-MaticCorporation

www.bunn.com

WARRANTY

Bunn-O-MaticCorp. (“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 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

The notice on the stands should be kept in good condition. Replace if unreadable or damaged.

00986.0000

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ELECTRICAL REQUIREMENTS

The stands have an attached cordset and requires 2-wiregrounded service rated 120 volts ac, single phase, 90 watts total for the 1SH, 180 watts total for the 2SH, or2-wiregrounded service rated 230 volts ac, single phase, 90 watts total for the 1SH, 180 watts total for the 2SH.

CLEANING

The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Maticequipment.

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-MaticTechnical Service Department.

•Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

•All electronic components have 120 - 240 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 per-

manent. If an intermittent condition is encountered, the cause will likely be a contact or a loose connection at a terminal or crimp.

WARNING

•Exercise extreme caution when servicing electrical equipment.

•Disconnect power source when servicing, except when electrical tests are specified.

•Follow recommended service procedures.

•Replace all protective shields or safety notices.

Problem	Probable Cause
Server will not heat	1.	No power or incorrect voltage.
	2.	Circuit breaker

3. Receptacle contact

4. Transformer

5. Rectifier

Remedy

Be sure the stand is connected to the power source.

A)Check and reset if necessary

B)Refer to Service - Circuit breaker for test procedures. See page 4

Clean or replace. See page 5

Refer to Service - Transformer for test procedures. See page 7

Refer to Service - Rectifier for test procedures. See page 6

Page	28342 071599

SERVICE

This section provides procedures for testing and replacing various major components used in these stands 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 stands should be unplugged when servicing, except when electrical tests are required and the test procedure specifically states to connect the stand to the power source.

COMPONENT ACCESS

WARNING - Disconnect the stand 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 receptacle cover and the stand cover.

FIG. 1 COMPONENT ACCESS	P1402

The receptacle cover is attached with four #6-32truss head locking screws.

The stand cover is attached with four #6-32truss head locking screws.

Contents
Circuit Breaker.........................................................	4
Receptacle (Spring Contacts)..................................	5
Rectifier...................................................................	6
Transformer.............................................................	7
Wiring Diagrams......................................................	9
CIRCUIT BREAKER

FIG. 2 CIRCUIT BREAKER	P1402

Location

The circuit breaker(s) is located on the upper part of the receptacle bracket just above the spring contact receptacle(s) assembly.

Page	28342 091597

SERVICE (cont.)

Test Procedures

1.Disconnect the stand from the power source.

2.Remove the wires from the circuit breaker.

3.Check for continuity between the circuit breaker terminals. Continuity must be present between the terminals.

If continuity is present as described the circuit breaker is functioning properly.

If continuity is not present as described, press reset button and repeat step #3, if continuity is not present as described, replace the circuit breaker.

Removal and Replacement:

1.Remove the wires from the circuit breaker.

2.Compress the clips on the back side of the receptacle bracket and gently push the circuit breaker through the opening in the receptacle bracket.

3.Push the new circuit breaker into the opening in the receptacle bracket until the clips snap into position.

4.Reconnect the wires to the circuit breaker.

5.Refer to Fig. 3 when reconnecting the wires.

BLU/BLK to Transformer #12
BLU/BLK to Rectifier "AC"
FIG. 3 CIRCUIT BREAKER TERMINALS	P1330

RECEPTACLE ASSEMBLY (SPRING CONTACT)

FIG. 4 RECEPTACLE ASSEMBLY

Location:

The receptacle assembly is located on the lower front of the receptacle bracket just below the circuit breaker.

Test Procedures:

1. Clean or replace spring contacts.

Removal and Replacement:

1.Disconnect the stand from the power source.

2.Disconnect the wires from the receptacle assembly.

3.Remove the two #6-32flat head screws securing the receptacle to the receptacle bracket.

4.Remove and discard receptacle.

5.Install new receptacle in the receptacle bracket and secure with two #6-32flat head screws..

6.Refer to Fig. 5 and reconnect the wires.

	FIG. 5 RECEPTACLE TERMINALS	P1380

Page

SERVICE (cont.)	RECTIFIERS (cont.)
RECTIFIER	Removal and Replacement:
	1	Disconnect the wires from the rectifier.
	2.	Remove the #6-32truss head screw securing the
		rectifier to the stand housing.
	3.	Remove the rectifier and discard.
	4.	Install new rectifier in the stand housing and secure
		with a #6-32truss head screw.
	5.	Refer to Fig 7 and reconnect the wires.

FIG. 6 RECTIFIER	P1403.40

Location:

The rectifier(s) is located inside on the right side of the stand housing just to the right of the transformer for 1SH Stand and on the right and left side of the stand housing for 2SH Stand.

Test Procedures:

1.Disconnect the stand from the power source.

2.Remove the red wire and the black wire from the rectifier.

3.Check the voltage across the (+) and (-)terminals on the rectifier with a voltmeter. Connect the stand to the power source. The indication must be 24 volts dc.

4.Disconnect the stand from the power source.

If voltage is present as described, the rectifier is operating properly.

If voltage is not present as described, refer to the stand wiring diagrams and check the stand wiring harness.

+	A
	A

FIG. 7 RECTIFIER TERMINALS	P1381

Page

SERVICE (cont.)

TRANSFORMER

		P1403.40
	FIG. 8 TRANSFORMER

Location:

The transformer(s) is located in the stand housing on the base plate.

Test Procedures:

1.Disconnect the stand from the power source.

2.Disconnect the black wire from terminal #5 and the white or red wire from terminal # 6.

3.Check the voltage across the black and white or red wire with a voltmeter. Connect the stand to the power supply. The indication must be:

a.) 120 volts ac for two wire 120 volt models. b.) 200 to 240 volts ac for two wire 200 or 240 volt models.

4.Disconnect the stand from the power supply.

If voltage is present as described reconnect the wires and proceed to #5.

If voltage is not present as described, refer to the wiring diagrams and check the stand wiring harness.

Page

SERVICE (cont.)

TRANSFORMER (cont.)

#6 WHI or RED from

Transformer Terminal #2

#12 BLU/BLK to Circuit Breaker

#5 BLK From Transformer Terminal #1

6	#7BLU/BLK to Rectifier
2
5
4
3	Terminal "AC"
1

#2 WHI or RED From Power Supply Connection #1 BLK From Power Supply Connection

1SH STAND

#6 WHI or Red to Transformer Terminal #2

#6 WHI or RED From
Power Supply Connection
#5 BLK to Transformer
Terminal #1	6
#2 WHI or RED from	3 4 5
Transformer Terminal #6	2
#1 BLK From Power
Supply Connection
#1 BLK from Transformer
Terminal #5

#12 BLU/BLK to Left Circuit Breaker

#5 BLK to Right Transformer Terminal #1

#7 BLU/BLK to Left Rectifier "AC"

#2 WHI or Red to Right Transformer Terminal #2

#6 WHI or RED from Transformer Terminal #2

	#5 BLK from	#12 BLU/BLK to
		Right Circuit Breaker
	Transformer
	Terminal #1

	#2 WHI or Red		#7 BLU/BLK to Right
		4 5 6	Rectifier "AC"
	From Left
		1 2 3	#2 WHI or RED to
	Transformer
			Transformer Terminal #6
	Terminal #2
	#1 BLK From Right		#1 BLK to Transformer
	Transformer Terminal		Terminal #5
	#5

LEFT		RIGHT
	2SH STAND
		P1404
	FIG.9 TRANSFORMER TERMINALS

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			SCHEMATIC WIRING DIAGRAM
		GRN		1 SH STAND
N	L1
				TRANSFORMER
	BLK		1	12	BLU/BLK	4
	WHI		2			AMP
120 VOLTS AC, 2 WIRE			5
					BLU/BLK
	SINGLE PHASE		6	7

		–	+
		Front view of Server Contacts
BLU/BLK		24VDC
		–	+
AC	–	BLK
+	RECT
	AC
BLU/BLK		RED

			SCHEMATIC WIRING DIAGRAM
N	L1	GRN	2 SH STAND
			TRANSFORMER

–+

Front view of Server Contacts

BLK	1	12	BLU/BLK	4	BLU/BLK		24VDC		24VDC
							–	+	–	+
				AMP
WHI	2						BLK
					AC	–
					+	RECT
						AC
	5
	6	7	BLU/BLK		BLU/BLK		RED
		TRANSFORMER
	1	12	BLU/BLK	4	BLU/BLK
	2			AMP			BLK
					AC	–
120 VOLTS AC, 2 WIRE					+	RECT
	BLK					AC
SINGLE PHASE	5
	WHI		BLU/BLK		BLU/BLK
		7					RED
	6

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			SCHEMATIC WIRING DIAGRAM
		GRN/YEL	1 SH STAND, 230V CE
L2	L1
				TRANSFORMER
	BRN		1	12	BLU/BLK	4
	BLU		2	11	AMP
			BLK		RESETTABLE
230 VOLTS AC, 2 WIRE			5	8	FUSE
					BLU/BLK
	SINGLE PHASE		6	7

		–	+
		Front view of Server Contacts
BLU/BLK		24VDC
		–	+
AC	–	BLK
+	RECT
	AC
BLU/BLK		RED

27789.0001D 11/98 © 1997 BUNN-O-MATICCORPORATION

L2	L1			SCHEMATIC WIRING DIAGRAM
		GRN/YEL		2 SH STAND, 230V CE
				TRANSFORMER
	BRN		1	12	BLU/BLK	4
BLU			2	11		AMP
			BLK		RESETTABLE
			5	8	FUSE
			6	7	BLU/BLK
				TRANSFORMER
			BRN/BLK 1	12	BLU/BLK	4
			2	11		AMP
230 VOLTS AC, 2 WIRE			BLK		RESETTABLE
				8	FUSE
SINGLE PHASE			5
			BLU		BLU/BLK
				7
			6
27793.0001C	11/98 © 1997 BUNN-O-MATICCORPORATION

			–	+
		Front view of Server Contacts
BLU/BLK		24VDC		24VDC
		–	+	–	+
AC	–	BLK
+	RECT
	AC
BLU/BLK		RED
BLU/BLK
AC	–	BLK
+	RECT
	AC
BLU/BLK		RED

Page 10	28342 071599