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Bunn H5X - page 1
BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .bunnomatic.com H5E H5X 10420.0000K 06/05 © 1989 BUNN-O-MATIC CORPORATION OPERA TING & SER VICE MANU AL WARNING Very Hot Water Use With Care! ! DISCONNECT FROM POWER SOURCE BEFORE REMOVAL OF ANY PANEL OR REPLACEM ...
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Bunn H5X - page 2
2 CONTENTS Introduction ................................................. 2 Warranty ...................................................... 2 User Notices ................................................ 3 Electrical Requirements ............................... 4 Plumbing Requirements .............................. 4 Initial Set-Up ................ ...
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Bunn H5X - page 3
3 12593.0000 00831.0000 10044.0000 USER NOTICES The notices on this dispenser should be kept in good condition. Replace unreadable or damaged labels. 00656.0000 10420 072500 ...
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Bunn H5X - page 4
4 ELECTRICAL REQUIREMENTS CAUTION - The dispenser must be disconnected from the power source until specified in Initial Set-Up. This dispenser requires 2-wire, grounded service rated 120, 208, or 240 volts ac, 20 amp, single phase. (Refer to the dispenser’s dataplate for exact voltage requirement.) Electrical Hook-Up CAUTION – Improper electric ...
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Bunn H5X - page 5
5 INITIAL SET -UP CAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Remove the upper rear panel and place the tank heater switch in the “OFF” position and replace the panel. 2. Connect the dispenser to the power sour ce and turn-on the water supply . 3 ...
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Bunn H5X - page 6
6 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 T ech- nical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by q ...
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Bunn H5X - page 7
7 TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Automatic refill will not operate after drawing hot water . Water flows into the tank con- tinuously (Dispenser discon- nected from power sour ce). Water flows into the tank con- tinuously (Dispenser connected to power source). Water is cold. 1. No water 2. W ater strainer/flow control 3. Safe ...
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Bunn H5X - page 8
8 TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water boils continuously . Dispenser is making unusual noises. Ready indicator will not light. (when temperature is within 4 ° of its selected setting.) 1. T emperature control 2. Lime build-up 1. Solenoid valve 2. Plumbing lines 3. Water supply 1. T emperature control 2. Ready Indicator LED ...
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Bunn H5X - page 9
9 SERVICE This section provides procedures for testing and replacing various major components used in this dis- penser should service become necessar y . Refer to T roubleshooting 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 ...
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Bunn H5X - page 10
10 SERVICE (cont.) Electronic Controls Location: The electronic control assembly is located inside the rear of the dispenser . Access will also be needed to the temperature sensor , over flow tube temperature sensor , and liquid level probe located on the tank lid and to the triac assembly located beneath the tank. General: This system controls the ...
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Bunn H5X - page 11
11 SERVICE (cont.) Electronic Controls (cont.) Liquid Level Control Test Procedure 1. Disconnect the dispenser from the power sour ce. 2. Check the voltage across terminals 3 & 4 of the electronic control assembly with a voltmeter . Con- nect the dispenser to the power sour ce. The indi- cation must be: a.) 100 to 120 volts ac for 100 to 120 vo ...
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Bunn H5X - page 12
12 SERVICE (cont.) Electronic Controls (cont.) 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 probe away from any metal surface of the dispenser . 9. Ch ...
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Bunn H5X - page 13
13 SERVICE (cont.) Electronic Controls (cont.) If the indicator was on or blinking, the temperature sen- sor is operating properly , proceed to #7. If the indicator was off, check the sensor connection on the electronic control cir cuit board and/or replace the temperature sensor and the electronic control as- sembly . NOTE - Each temperature senso ...
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Bunn H5X - page 14
14 SERVICE (cont.) Electronic Controls (cont.) Electronic Controls Removal and Replacement NOTE - Each electronic control assembly is calibrated to a temperature sensor probe. Both 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 ...
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Bunn H5X - page 15
15 10420 060305 SERVICE (cont.) Electronic Controls (cont.) Adjustments The H5X dispenser holds the water temperature at the threshhold of boiling. It is not adjustable by the user . The H5E dispenser is factory calibrated for the tem- perature specified on the data plate. If adjustment is required, use the following procedure: 1. Fill the dispense ...
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Bunn H5X - page 16
16 SERVICE (cont.) Limit Thermostat Location: The limit thermostat is located on the tank lid. T o test the limit thermostat, access will also be needed to the terminal block located at the rear 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 W ...
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Bunn H5X - page 17
17 SERVICE (cont.) Safety Overflow Switch Location: The safety overflow switch is located inside the rear of the dispenser inside the copper overflow cup. For testing or removal of the safety overflow switch, access may also be needed by removing the two screws attaching the electronic control assembly to its mount- ing bracket. Test Procedure: 1. ...
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Bunn H5X - page 18
18 SERVICE (cont.) Solenoid Valve Location: The solenoid valve is located inside the rear of the dis- penser on the right side near the bottom. T o test the solenoid valve, access will also be needed to the electronic control assembly . 7. Check the solenoid valve for coil action. Connect the dispenser to the power sour ce. Listen carefully in the ...
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Bunn H5X - page 19
19 SERVICE (cont.) Tank Heater Location: The tank heater is located in the tank lid. Test Procedure: 1. Disconnect the dispenser from the power sour ce. 2. Check the voltage across the terminals of the tank heater with a voltmeter . Connect the dispenser to the power sour ce. The indication must be: a.) 100 to 120 volts ac for 100 to 120 volt model ...
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Bunn H5X - page 20
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Bunn H5X - page 22
22 TANK HEATER SW ELECTRONIC CONTROL ASSY 230 VOLTS A C 2 WIRE SINGLE PHASE LIMIT THERMOSTAT SCHEMATIC WIRING DIAGRAM H5XA, H5EA BLU BLU 10332.0001B 09/02 © 2002 BUNN-O-MATIC CORPORATION L1 N WHI/VIO SOL H5XA Only GRN/YEL (PROBE) PNK 20 6 7 3 2 1 5 4 TAN RED RED RED BLK GRN/YEL BLK WHI/BLU RED SAFETY SW RED RED WHI/BRN BLK t ° W H I W H I G R Y G ...
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