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INTRODUCTION This equipment will brew two half-gallon, gallon, or gallon and three forths batches of coffee into awaiting servers at the push of a button. The brewer is also equipped with a hot water faucet for allied beverage use and ® ® is designed to interface with a BUNN Grinder. The brewer is specifically designed for use with BUNN .5 gallon and 1.75 gallon servers. It is only for indoor use on a sturdy counter or shelf. WARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufac
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Electrical Hook-Up CAUTION – Improper electrical installation will damage electronic components. 1. An electrician must provide electrical service as specified. 2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source. 3. Remove the front panel beneath the sprayheads. Models with electronic control assemblies: Place the tank heater switch at the top of the control assembly in the “OFF” position. Models with electro/mechanical thermostats: Rotate the con
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INITIAL SET-UP (cont.) 4. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature. 5. Place an empty server beneath either of the brew stations. Place its associated Selector switch in the desired position, the On/Off switch in the upper position and initiate a brew cycle. 6. Place the On/Off switch in the lower “OFF” position after water has stopped flowing from the funnel, and check the water volume in the server. It should be 64 oz (1/2 gallon), 128 oz
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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 Technical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. • All electronic components have 120 - 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the
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TROUBLESHOOTING (cont.) Probable Cause Problem Remedy Brew cycle will not start (cont.) 3. Water strainer/flow control (.750 (A) Direction of flow arrow must be GPM) pointing towards brewer. (B) Remove the strainer/flow con- trol and check for obstructions. Clear or replace. 4. ON/OFF switch Refer to Service - ON/OFF switch for testing procedures. See page 28 5. Start switch Refer to Service - Start switch for testing procedures. See page 34 6. Timer Refer to Service - Timer for testing procedu
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Automatic refill will not operate 4. Overflow protection switch Refer to Service - Overflow protec- (cont.) tion switch for testing procedures. See page 30 5. (A) Level control board & level Refer to Service - Level control board probe. (Electro/mechanical con- for testing procedures. See page 26 trolled) (B) Electronic controls Refer to Service - Electronic con- trols for testing procedures. See page 20 thru 25 Beverage level will not a
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water from tank is not hot (cont.). (B) Control assembly (Electronic) Refer to Service - Control assembly for testing procedure. See page 20 thru 25 3. Contactor (Brewers with Recov- Refer to Service - Contactor for test- ery booster) ing procedures. See page 16 4. Tank heaters Refer to Service - Tank heaters for testing procedures. See page 35 5. Triac assembly (Electronic) Refer to Service - Triac assembly for testing procedures. See pa
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Inconsistent beverage level in server. 2. Improper water pressure Check the operating water pressure (cont.) to the brewer. It must be between 20 and 90 psi (138 and 620 kPa). 3. Dispense valve Refer to Service - Dispense valve for testing procedures. See page 19 Refer to Initial Set-Up on page 5 step 4. Bypass valve #7. For test procedure see page 13. Consistently high or low beverage 1. Timer adjustment Adjust the timer as required to level
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy ® Weak beverage 1. Type of paper filters BUNN paper filters should be used for proper extraction. 2. Coffee A sufficient quantity of fresh drip or regular grind should be used for proper extraction. 3. Sprayhead B.O.M. sprayhead #01082.0002 should be used to properly wet the bed of ground coffee in the funnel. ® 4. Funnel loading The BUNN paper filter should be centered in the funnel and the bed of ground coffee leveled by gentle shak- ing.
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L L H H C C I I Q Q Contents SERVICE Brew Selector Switch............................................14 This section provides procedures for testing Bypass Valve ........................................................13 and replacing various major components used in this Contactor Assembly..............................................16 brewer should service become necessary. Refer to Control Thermostat...............................................18 Troubleshooting for assistance in determin
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8. Reattach the connector to the brew timer circuit SERVICE (cont.) board. BREW SELECTOR SWITCH (cont.) 9. Refer to the illustration below when reconnecting the wires. 6. Install the new switch. The positioning tab must be in the hole in the hood for proper switch and knob alignment. 7. Install the knob so that the arrow points to the 1- 3/4 gallon position when the switch is turned to the full right position. WHI/RED to Left or Right WHI/VIO to Left or Right Dispense Valve By-Pass Valve WHI/G
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SERVICE (cont.) Removal and Replacement: 1. Remove all wires from the contactor. CONTACTOR ASSEMBLY (cont.) 2. Remove the two #10-32 slotted head screw secur- ing contactor to the inside of the hood. 3. Securely install the new contactor inside the hood. Test Procedures : 4. Refer to the following illustration when reconnect- Electronic Control (Brewers w/Recovery Booster) ing the wires. 1. Disconnect the brewer from the power source. 2. Disconnect the gray wire from the black wire on the cont
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