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! WARNING
DISCONNECT FROM POWER SOURCE
BEFORE REMOVAL OF ANY PANEL OR
REPLACEMENT OF ANY COMPONENT!
H5E
H5X
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
www.bunnomatic.com
10420.0000K 06/05 © 1989 BUNN-O-MATIC CORPORATION
! WARNING
Very Hot Water
Use With Care!
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CONTENTS Introduction ................................................. 2 Warranty ...................................................... 2 User Notices ................................................ 3 Electrical Requirements ............................... 4 Plumbing Requirements .............................. 4 Initial Set-Up................................................ 5 Draining the Dispenser ................................ 5 Cleaning....................................................
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USER NOTICES The notices on this dispenser should be kept in good condition. Replace unreadable or damaged labels. 12593.0000 00831.0000 00656.0000 10044.0000 10420 072500 3
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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 source and turn-on the water supply. 3. Water will automatically flow into the tank to the proper level and shut-off. This will take approximately 10 minutes. 4. Disconnect the dispenser from the p
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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 Tech- nical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel. • All electronic components have 120 – 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Automatic refill will not operate 1. No water Check plumbing and shut-off valves. after drawing hot water. 2. Water strainer/flow control (A) Direction of flow arrow must be point- ing towards dispenser. (B) Remove the strainer/flow control and check for obstructions. Clear or replace. 3. Safety overflow switch Refer to Service – safety overflow switch for testing procedures. See page 17. 4. Liquid level system Refer to Service – electronic c
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water boils continuously. 1. Temperature control Refer to Service – electronic controls for testing procedures. See page 10. 2. Lime build-up Inspect the tank assembliy for excess lime deposits. Delime as required. 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
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SERVICE (cont.) 5. Check the voltage across terminals 1 & 4 of the electronic control assembly with a voltmeter. Con- Electronic Controls (cont.) nect the dispenser to the power source. The indi- Liquid Level Control Test Procedure cation must be: a.) 100 to 120 volts ac for 100 to 120 voltmodels 1. Disconnect the dispenser from the power source. or 2. Check the voltage across terminals 3 & 4 of the b.) 200 to 240 volts ac for 200 to 240 volt models electronic control assembly with a voltmeter.
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SERVICE (cont.) If voltage was present as described, reinstall the probe, Electronic Controls (cont.) the sensing function of the system is operating prop- erly. 7. Reconnect the pink wire to terminal 5 of the elec- If voltage was not present as described, check the pink tronic control assembly. probe wire and the green ground wire for continuity 8. Loosen the compression fitting, remove the probe and/or replace the probe. from the tank lid, and inspect it for mineral depos- its. Replace it if
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SERVICE (cont.) Electronic Controls (cont.) 10. Check the voltage across the tank heater terminals with a voltmeter. Connect the dispenser to the If the indicator was on or blinking, the temperature sen- power source. The indication must be: sor is operating properly, proceed to #7. a.) 100 to 120 volts ac for 100 to 120 volt models If the indicator was off, check the sensor connection or on the electronic control circuit board and/or replace b.) 200 to 240 volts ac for 200 to 240 volt models t
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SERVICE (cont.) 8. Reconnect the wires. Electronic Controls (cont.) 9. Review the initial set-up procedures. Electronic Controls Removal and Replacement Triac Assembly Removal and Replacement NOTE - Each electronic control assembly is calibrated NOTE - Each triac installation requires the use of an to a temperature sensor probe. Both components MUST be replaced as a set. approved silicone heat sink compound. Bunn-O-Matic recommends the use of Dow Corning 340 compound or equivalent. It can be pur
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SERVICE (cont.) 4A. TO INCREASE THE TEMPERATURE Electronic Controls (cont.) Turn the adjustment screw in a clockwise direction with a small screwdriver. Allow the temperature to Adjustments stabilize as described in step 2 and repeat step 3. The H5X dispenser holds the water temperature at Continue until the desired water temperature is the threshhold of boiling. It is not adjustable by the achieved. user. The H5E dispenser is factory calibrated for the tem- 4B. TO DECREASE THE TEMPERATURE pera
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SERVICE (cont.) Limit Thermostat If voltage was present as described, reconnect the black Location: wire and proceed to #5. The limit thermostat is located on the tank lid. If voltage was not present as described, refer to the To test the limit thermostat, access will also be needed Wiring Diagrams and check the dispenser wiring har- to the terminal block located at the rear of the dispenser. ness. 5. Check for continuity across the terminals of the limit thermostat. If continuity is not present
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