Instruction/ maintenance manual of the product H10X Bunn
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BU N N ® H10X OPERA TING & SER VICE MANU AL B UNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 10889.
2 W ARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation. In addition: 1.
3 USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels. 12593.0000 10044.0000 00656.0000 NOTICE ALL COMPONENTS ARE 200 TO 240 VOLT A.
4 ELECTRICAL REQUIREMENTS CAUTION - The dispenser must be disconnected from the power sour ce until specified in Initial Set-Up. This dispenser requires 2-wire, grounded service rated 208 or 240 volts ac, 40 amp, single phase. ( Refer to the dispenser ’ s dataplate for exact voltage requirement.
5 INITIAL SET -UP CAUTION - The dispenser must be disconnected from the power sour ce throughout the initial set-up, except when specified in the instructions. 1. Connect the dispenser to the power sour ce and turn on the water supply . 2. The “ HEA TER ” LED will glow for approximately five seconds.
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 echnical Ser vice Department.
7 TROUBLESHOOTING (cont.) PROBLEM Automatic refill will not operate af- ter drawing hot water . Water flows into the tank continu- ously . (Dispenser disconnected from power sour ce). Water flows into the tank continu- ously (Dispenser connected to power sour ce).
8 TROUBLESHOOTING (cont.) PROBLEM Water is cold (cont.) Water boils continuously . PROBABLE CAUSE 3. T ank heater 4. T emperature control 5. Dr y plug pr otection 1. T emperature control 2. Lime build-up REMEDY Refer to Service - T ank heater for testing procedures.
9 WARNING Very Hot Water Use With Care! ! WARNING Very Hot Water Use With Care! ! 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.
10 SERVICE (cont.) Electronic Control Assembly T roubleshooting: Check these items first • Is circuit board popped out of bracket? • Is circuit board wet due to misaligned overflow tube? • Is wa.
11 SERVICE (cont.) Electronic Controls (cont.) Liquid Level Control T est Pr ocedure 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 source.
12 SERVICE (cont.) Electronic Controls (cont.) T emperatur e Control Flow Charts (cont.) Still Boiling ? Heater Light On While Boiling ? Retry Drain cup Retry Disconnect Blue Wire F rom Control Board .
13 SERVICE (cont.) Electronic Controls (cont.) 11. Disconnect the dispenser from the power sour ce. If voltage was present as described, return the new triac assembly to Bunn-O-Matic for credit. The tem- perature control of the system is operating properly .
14 T riac Assembly Removal and Replacement NOTE - Each triac installation requires the use of an approved silicone heat sink compound. Bunn-O-Matic recommends the use of Dow Corning 340 compound or equivalent. It can be pur chased direct from Bunn-O- Matic (P .
15 SERVICE (cont.) Limit Thermostat P1993 FIG. 5 LIMIT THERMOST A T T est Pr ocedure: 1. Disconnect the dispenser from the power sour ce. 2. There are two black wires on the limit thermostat terminals. One comes from the terminal block. The other goes directly to the tank heater terminal.
16 Location: The overflow protection switch is located within the side of the dispenser inside the copper overflow cup. For testing or removal of the overflow protection switch, access may also be needed by removing the two screws attaching the electronic control assembly to its mount- ing bracket.
17 Solenoid Valve Location: The solenoid valve is located within the side 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 . BUNN 90 psig max operating pressure Strainer/Flow Control # 22300.
18 WHI/BLU to Electronic Contol #1 RED to T erminal Block RED to Electronic Control #5 P1779 FIG. 10 SOLENOID V AL VE WIRING 5. Lift out the solenoid valve. 6. Remove the two 10-32 slotted-head screws hold- ing the solenoid valve to its mounting bracket.
19 SERVICE (cont.) T ank Heater Location: The tank heater is located in the tank lid. P1993 FIG. 11 T ANK HEA TER T est Pr ocedure: 1. Disconnect the dispenser from the power sour ce. 2. Check the voltage across the terminals of the tank heater with a voltmeter .
20 WIRING DIAGRAM 10889 091599.
An important point after buying a device Bunn H10X (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn H10X yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn H10X - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn H10X you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn H10X will certainly help you make a decision on the purchase.
If you already are a holder of Bunn H10X, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn H10X.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn H10X. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn H10X along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
