Soft Heat Server Double Stand
Contents
1. 230 VOLTS AC 2 WIRE SINGLE PHASE 28342 071599 Page 102. BUNN su 25H OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 To obtain the Illustrated Parts Catalog visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the catalog Contact Bunn O Matic Corporation at 1 800 286 6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U S Postal Service 28342 0000F 06 07 1997 Bunn O Matic Corporation www bunn com WARRANTY Bunn O Matic Corp Bunn warrants the equipment manufactured by it to be commercially free from de fects 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 mate rial 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 manufact
3. all surfaces on Bunn O Matic equipment 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 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 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 Remedy Server will not heat 1 No power or incorrect voltage sure the stand is connected to the power source 2 Circuit breaker A Check and reset if necessary B Refer to Service Circuit breaker for test procedures See page 4 3 Receptacle contact Clean or replace See page 5 4 Transformer Refer to Service Transformer for
4. DA m2 d Q 1 BLK From Right Transformer Terminal 5 FIG 9 TRANSFORMER TERMINALS Page 8 5 BLK From Transformer 7BLU BLK to Rectifier 12 BLU BLK to Right Circuit Breaker 7 BLU BLK to Right Rectifier AC 2 WHI or RED to Transformer Terminal 6 1 BLK to Transformer Terminal 5 28342 091597 SCHEMATIC WIRING DIAGRAM 1 SH STAND GRN TRANSFORMER SO OO Front view of Server Contacts I 100 or 120 VOLTS AC BLU BLK BLU BLK 2 WIRE GND SINGLE PHASE SCHEMATIC WIRING DIAGRAM GRN 2 SH STAND SO eO 4 Front view of Server Contacts TRANSFORMER BLK i 112 BLU BLK j BLU BLK 2AVDC 24VDC WHI 100 or 120 VOLTS AC 2 WIRE GND SINGLE PHASE BLU BLK Ree m AC E RECT i i AC BLU BLK Page 9 28342 061807 SCHEMATIC WIRING DIAGRAM 1 SH STAND 230V CE 12 14 GRN YEL SO os Front view of Server Contacts TRANSFORMER RESETTABLE FUSE BLU BLK SCHEMATIC WIRING DIAGRAM d T Bins 2 SH STAND 230V CE BOE Front view of Server Contacts TRANSFORMER PLE i12 BLU BLK ANI BLU BLK Neretes ns iuto AC H RECT RESETTABLE T ac FUSE BLU BLK BLU BLK 24VDC 24VDC RED BLU BLK BLU BLK i RESETTABLE De ag FUSE E AC BLU BLK BLU BLK BRN BLK
5. described the transformer is Operating properly If voltage is not present as described replace the transformer Removal and Replacement 1 Disconnect all the wires from the transformer 2 Remove the four 26 32 screws securing the transformer and mounting strap to the stand housing 3 Remove transformer and discard 4 I nstallnewtransformerinthe stand housing secur ing with four 76 32 screws and mounting strap 5 Referto Fig 9 when reconnecting the wires 28342 061807 SERVICE cont TRANSFORMER cont 6 WHI or RED from Transformer Terminal 2 28 7 Q vs V N X A X GREER MONON aiis SN j 12 BLU BLK to Circuit Breaker Terminal 1 Tv Terminal 2 WHI or RED From Power Supply Connection L 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 2 WHI or RED from Transformer Terminal 6 12 BLU BLK to Left Circuit Breaker 5 BLK to Right 47 BLU BLK to Left Rectifier AC 1 BLK From Power Supply Connection 1 BLK from Transformer Terminal 5 2 WHI or Red to Right Transformer Terminal 2 2SH STAND Transformer Terminal 1 6 WHI or RED from Transformer Terminal 2 5 BLK from Transformer Terminal 1 2 WHI or Red From Left Transformer Terminal 2 ere Kid ES NS Se 5 2 NS
6. test procedures See page 7 5 Rectifier Refer to Service Rectifier for test procedures See page 6 Page 3 28342 061807 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 electri cal equipment should be performed only by qualified service personnel The stands should be unplugged when servicing except when electrical tests are re quired 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 replace ment of any component All components are accessible by the removal of the receptacle cover and the stand cover FIG 1 COMPONENT ACCESS The receptacle cover is attached with four 6 32 truss head locking screws The stand cover is attached with four 6 32 truss head locking screws Contents Circuit Breaker 4 Receptacle Spring Contacts 5 Rectifier 6 oeste reat 7 Wiring 2 9 CIRCUIT BREAKER FIG 2 CIRCUIT BREAKER Location The circuit break
7. NY 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 AWARNING DO NOT OVERLOAD CIRCUIT ALWAYS ELECTRICALLY GROUND THE CHASSIS OR ADAPTOR PLUG DO NOT DEFORM PLUG OR CORD FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES KEEP COMBUSTIBLES AWAY FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODUCT 00986 0000E 5 98 1994 Bunn O Matic Corporation Page 2 28342 071599 ELECTRICAL REQUIREMENTS The stands have an attached cordset and requires 2 wire grounded service rated 100V or 120 volts ac single phase 90 watts total for the 1SH 180 watts total for the 2SH or 2 wire grounded 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
8. er s is located on the upper part of the receptacle bracket just above the spring contact receptacle s assembly Page 4 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 recep tacle 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 712 BLU BLK to Rectifier AC FIG 3 CIRCUIT BREAKER TERMINALS RECEPTACLE ASSEMBLY SPRING CONTACT FIG 4 RECEPTACLE ASSEMBLY 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 p
9. ower source 2 Disconnect the wires from the receptacle assem bly 3 Remove the two 6 32 flat 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 32 flat head screws 6 Refer to Fig 5 and reconnect the wires BLK to Terminal on Rectifier RED to Terminal on Rectifier FIG 5 RECEPTACLE TERMINALS Page 5 28342 091597 SERVICE cont RECTIFIER 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 op erating properly If voltage is not present as described refer to the stand wiring diagrams and check the stand wiring harness RECTIFIERS cont Removal and Replacement 1 Disconnect the wires from the rectifier 2 Remove the 76 32 truss head screw securing the rectifier to the stand housing 3 Remove the rec
10. tifier and discard 4 Install new rectifier inthe stand housing and secure with a 76 32 truss head screw 5 Referto Fig 7 and reconnect the wires r RED to Right Receptacle Terminal r BLU BLK to Transformer 7 BLU BLK to Circuit Breaker BLK to Left Receptacle Terminal N Q S FIG 7 RECTIFIER TERMINALS Page 6 28342 061598 SERVICE cont TRANSFORMER 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 100 volts ac for two wire 100 volt models b 120 volts ac for two wire 120 volt models c 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 7 5 Disconnet the blue black wires from terminals 7 and 12 on the transformer 6 Check the voltage across terminal 7 and 12 of the transformer with a voltmeter Connect the stand to the power source The indication must be 24 volts ac If voltage is present as
11. ured 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 A
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