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Bunn H10X, Operating & Service Manual

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OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

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

www.bunn.com

H10X

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ater

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10889.0000E  02/08   ©1995 Bunn-O-Matic Corporation

To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog, please visit the Bunn-O-Matic 

website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates. 

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.

Summary of Contents for H10X

Page 1: ...95 Bunn O Matic Corporation To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog please visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the latest catalog and manual updates Contact Bunn O Matic Corporation at 1 800 286 6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U ...

Page 2: ...cordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive option while the equipment is under warranty shall either 1 provide at no charge replacement parts and or labor during the applicable parts and labor warranty p...

Page 3: ...he Food and Drug Adminis tration FDA For models installed outside the U S A comply with the applicable Plumbing Sanitation Code WARNING Fill water tank before turning on thermostat or connecting appliance to power source Use only on a properly protected circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes Do not use near combustibles FAILURE TO C...

Page 4: ...n 20 and 90 psi 138 and 620 kPa from a 1 2 or larger supply line A shut off valve should be installed in the line before the dispenser Install a regulator in the line when pressure is greater than 90 psi 620 kPa to reduce it to 50 psi 345 kPa The water inlet fitting is 1 4 flare NOTE Bunn O Matic recommends 1 4 tubing for installations of less than 25 feet and 3 8 for more than 25 feet from the 1 ...

Page 5: ...he small screws from the sides and front of the top panel 4 Gently remove one of the grommets from the tank lid 5 Insert a tube to the bottom of the tank and syphon ALL of the water out NOTE The dispenser must be refilled using the INITIAL SET UP steps before reconnecting to the power source CLEANING The use of a damp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleani...

Page 6: ...mage may result if solenoids are energized for more than ten minutes without a supply of water The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated This dispenser is heated at all times Keep away from combu...

Page 7: ...rrow must be pointing towards dispenser B Remove the strainer flow control and check for obstructions Clear or replace Refer to Service Overflow protec tion switch for testing procedures See page 16 Refer to Service Electronic con trols for testing procedures See page 11 Refer to Service Solenoid valve for testing procedures See page 17 Refer to Service Solenoid valve for testing procedures See pa...

Page 8: ...g on local water conditions Exces sive mineral build up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks Dispenser is making unusual nois es Ready indicator will not light when temperature is within 4 of its se lected setting 1 Solenoid valve 2 Plumbing lines 3 Water supply 1 Temperature control 2 Ready Indicator LED The nut on top of the solenoid valve must ...

Page 9: ... Access is gained by removing the side panel The panel is at tached with eight 8 32 slotted head screws P878 P878 The limit thermostat liquid level probe tank heater and temperature sensor are located at the top of the dispenser Access is gained by removing the top lid attached with four 4 40 slotted head screws WARNING Inspection testing and repair of electri cal equipment should be performed onl...

Page 10: ... Assy Electronic Control P1991 FIG 1 ELECTRONIC CONTROL AND TRIAC Location The electronic control assembly is located inside the side of the dispenser Access will also be needed to the temperature sensor overflow tube temperature sensor and liquid level probe located on the tank lid and to the triac assembly located on the inside of the rear wall General This system controls the liquid level and w...

Page 11: ...y and the temperature sen sor in the tank lid NOTE Each electronic control assembly is calibrated to a temperature sensor Both components MUST be replaced as a set 7 Reconnect the pink wire to terminal 5 of the elec tronic control assembly 8 Loosen the compression fitting remove the probe from the tank lid and inspect it for mineral depos its Replace it if necessary Keep the exposed ends of the pr...

Page 12: ...or and the electronic control as sembly NOTE Each temperature sensor is calibrated to an electronic control assembly Both components MUST be replaced as a set 7 Check the voltage across the tank heater terminals with a voltmeter Connect the dispenser to the power source The indication must be 200 to 240 volts ac for 200 to 240 volt models while the red indicator on the circuit board is on or blink...

Page 13: ...th components MUST be replaced as a set 1 Remove all wires from the electronic control as sembly terminals 2 Remove the two 8 32 screws holding the electronic control assembly to the component bracket 3 Disconnect the temperature sensor overflow tube temperature sensor and indicator wires from the left side of the electronic control assembly board 4 Remove the temperature sensor from the grommet i...

Page 14: ... copper heat sink SERVICE cont Electronic Controls cont 3 Securely fasten the new triac assembly to the rear panel in the same relative position as the one removed Bunn O matic recommends tightening the nut to a torque setting of approximately 18 inch pounds 4 Disconnect the other ends of the old triac assembly wires 5 Connect the TAN and BLU wires with spade termi nals of the new assembly to the ...

Page 15: ...ostat Location The limit thermostats are located on the tank lid To test the limit thermostats access will also be needed to the terminal block located on the side of the dispenser If voltage was present as described reconnect the black wire and proceed to 5 If voltage was not present as described refer to the Wiring Diagrams and check the dispenser wiring har ness 5 Check for continuity across th...

Page 16: ...roperly If continuity is not present as described replace the overflow protection switch RED to BLK Wire from Terminal Block RED to BLK Wire from Electronic Control 3 P1777 FIG 8 OVERFLOW PROTECTION WIRING Removal and Replacement 1 Disconnect the black wires from the overflow pro tection switch 2 Remove the nut beneath the copper overflow cup 3 Remove the entire switch assembly from the cup 4 Plac...

Page 17: ...e coil terminals 6 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the wires and proceed to 7 If continuity is not present as described replace the solenoid valve coil 7 Check the solenoid valve for coil action Connect the dispenser to the power source Listen carefully in the vicinity of the solenoid valve for a clicking sound after app...

Page 18: ...lding the solenoid valve to its mounting bracket 7 Securely install the new solenoid valve to its mount ing bracket The direction of flow arrow must be pointing towards the tank lid 8 Attach the solenoid valve and mounting bracket to the component bracket 9 Securely fasten the water lines to and from the solenoid valve 10 Reconnect the wires FIG 10 SERVICE cont Solenoid Valve cont 10889 091599 ...

Page 19: ...ank heater is operating properly If continuity is not present as described replace the tank heater Removal and Replacement 1 Remove the wires to the tank heater 2 Remove the 8 32 nuts from the tank heater flange 3 Remove the tank heater 4 Inspect the tank heater gasket and replace if neces sary 5 Securely install the new tank heater Be certain of a watertight seal 6 Reconnect the wires FIG 12 BLU ...

Page 20: ...Y TAN RED WHI BLU BLK OVERFLOW PROTECTION SWITCH BLU 6 3 1 5 4 8 7 2 9 TAN HEATER REFILL WHI VIO BLK BLU TRIAC TANK HEATER BLK RED BLK RED INTERLOCK DRY PLUG IN ASSY WHI WHI GRY GRY t STEAM SENSOR TEMP SENSOR DRY LEVEL PROBE GRY GRY PNK PNK PNK PNK GRY GRY WHI WHI GRY GRY READY POWER GRN YEL WHI RED LIMIT THERMOSTAT LIMIT THERMOSTAT P1 P2 P101 J1 J3 J2 BLK L1 L2 BLK RED RED MAIN ON OFF SWITCH Late...

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