Bunn H5M Operating & Service Manual

Bunn operating & service manual hot water dispenser h5m

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Illustrated parts catalog (29 pages)

Operating & service manual (20 pages)

Service & repair manual (37 pages)

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Page 1 To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, 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. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
Page 2: Warranty
SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, 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 3: Table Of Contents
FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE, OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000F 3/98 ©1998 BUNN-O-MATIC CORPORATION 00831.0000 37881.0000 10267 040709...
Page 4: Electrical Requirements
CAUTION - The dispenser must be disconnected from the power source until specified in Initial Set-Up. The H5M dispenser requires 2-wire, grounded service rated 120, 208, or 240 volts ac, 20 amp, single phase. The H5MA, 230V-CE dispenser requires 2-wire, grounded service rated 230 volts ac, 40 amp, single phase, 50/60Hz. (Refer to the dispenser’s dataplate for exact voltage requirement.)
Page 5: Initial Set-Up
3. Remove the 4-40 screws at the sides 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. Bunn-O-Matic has a syphon assembly avail- able (#12440.0000) for this purpose.
Page 6: Troubleshooting
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 person- nel.
Page 7 TROUBLESHOOTING (cont.) Problem Automatic refill will not oper- after drawing hot water. Water flows into the tank con- tinuously (Dispenser discon- nected from power source). Water flows into the tank con- tinuously (Dispenser connect- ed to power source). Water is cold. CAUTION –...
Page 8 TROUBLESHOOTING (cont.) Problem Water boils continuously. CAUTION – Tanks and tank components should be delimed reglarly depending 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 noises.
Page 9: Service
SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. Component Access WARNING – Disconnect the dispenser from the power source before the removal of any panel or the replace- ment of any component.
Page 10: Limit Thermostat
SERVICE (cont.) Limit Thermostat Location: The limit thermostat is located on the tank lid. To test the limit thermostat, access will also be needed to the terminal block located at the rear of the dis- penser. FIG. 1 LIMIT THERMOSTAT Test Procedure: 1.
Page 11: Safety Overflow Switch
SERVICE (cont.) Safety Overflow Switch FIG. 3 SAFETY OVERFLOW SWITCH Location: The safety overflow switch is located inside the rear of the dispenser inside the copper overflow cup. Test Procedure: Once voltage is verified at the power source, check for continuity across the safety overflow switch red wires only until the plastic float is raised and check that continuity returns when the plastic float is again lowered.
Page 12: Solenoid Valve
SERVICE (cont.) Solenoid Valve Location: The solenoid valve is located inside the rear of the dispenser on the right side near the bottom. FIG. 5 SOLENOID VALVE Test Procedure: 1. Disconnect the dispenser from the power source and turn-off the water supply to the dispenser. 2.
Page 13: Tank Heater
SERVICE (cont.) Tank Heater Location: The tank heater is located in the tank lid. FIG. 7 TANK HEATER Test Procedure: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the terminals of the tank heater with a voltmeter. Connect the dispenser to the power source.
Page 14: Control Thermostat
SERVICE (cont.) Thermostat Location: The mechanical thermostat is located inside the upper rear panel. To test the thermostat, access will also be needed to the terminal block located inside the bottom access panel. FIG. 9 THERMOSTAT Test Procedure: 1. Disconnect the dispenser from the power source. 2.
Page 15: Liquid Level Board
SERVICE (cont.) Liquid Level Board FIG. 11 LIQUID LEVEL BOARD Location: The liquid level board is located inside the lower panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2. Remove the blue wire from terminal 1 and the pink wire from terminal 4 of the circuit board.
Page 16 SERVICE (cont.) Liquid Level Board (cont.) 15. Move the probe’s flat end to the dispenser housing. The indication must be 0. Move the probe’s flat end away from the dis- penser housing. The indication should again be: a.) 100 to 120 volts ac for 100 to 120 volt mod- els, b.) 200 to 240 volts ac for 200 to 240 volt mod- els,...
Page 17: Contactor
SERVICE (cont.) Contactor FIG. 13 CONTACTOR Location: The contactor is located on the component bracket inside the lower rear panel. Test Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the black wire from the contactor coil to the limit thermostat and black wire from the red wire on the main harness on two wire 240V models.
Page 18 SERVICE (cont.) Contactor (cont.) Removal and Replacement: 1. Disconnect all the wires from the contactor. 2. Remove the two #8-32 screws securing the con- tactor to the contactor mounting bracket, remove contactor and protective shield. Discard contac- tor. RED to Terminal Block(L2) BLK to left Tank Heater RED to Right...
Page 19: Wiring Schematics
208 or 240 VOLTS A C 2 WIRE + GND SINGLE PHASE SCHEMATIC WIRING DIAGRAM H5M LIMIT THERMOSTAT BLU/BLK LIQUID LEVEL BOARD (PROBE) 10243.0000E 01/07 © 1987 BUNN-O-MATIC CORPORATION N.O. TANK HEATER LIMIT THERMOSTAT BLU/BLK LIQUID LEVEL BOARD (PROBE) 10262.0000D 01/07 © 1987 BUNN-O-MATIC CORPORATION...
Page 20 SCHEMATIC WIRING DIAGRAM H5MA, 230V CE N.O. BLK-12 SW& THERMOSTAT OVERFLOW PROTECTION SWITCH 230 VOLTS A C 2 WIRE SINGLE PHASE LIMIT THERMOSTAT THERMOSTAT TANK HEATER BLU/BLK LIQUID LEVEL BOARD N.C. (PROBE) 10262.0001B 04/09 © 1999 BUNN-O-MATIC CORPORATION GREEN LIMIT N.O. RED-12 10267 040709...

Bunn H5M Operating & Service Manual

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