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®
BUNNEspress
™
ES•2C
ES•2C
Espresso Brewer
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10837.0000C 6/96 ©1994 Bunn-O-Matic Corporation
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CAUTION
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® ™ BUNN Espress ES•2C GENERAL User notices......................................................................................................................... 3 Site Requirements ...............................................................................................................4 Installation ........................................................................................................................... 5 Operating Controls...........................................
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® ™ BUNN Espress USER NOTICES ES•2C The notices on this brewer should be kept in good condition. Replace unreadable or damaged labels. 00656.0000 00831.0000 CAUTION HOT Liquid-Steam-Surfaces 24246.0000 24247.0000 3
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® ™ BUNN Espress SITE REQUIREMENTS ES•2C PHYSICAL 1 1 The brewer is for indoor use only on a sturdy counter. It is 26 ⁄2” (67 cm) wide,16” (40.5 cm) tall, and 19 ⁄2” (49 cm) deep. The brewer weighs approximately 142 pounds (64.5 kg) when the water tank is filled. PLUMBING The brewer must be connected to a cold water source with operating pressure between 20 and 90 psi (1.5- 1 6.5 bar) from a ⁄2” or larger supply line. Install a valve in the water line before the brewer. Install a regulato
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® ™ BUNN Espress INSTALLATION ES•2C PLUMBING Install the brewer as indicated below FROM WATER INLET HOSE SUPPLY WATER STRAINER ASSY. 24682.0000 Adaptor 24684.0000 23820.0000 24684.0000 Sealing Washer Strainer Assy. Sealing Washer 24683.0000 Adapter To Espresso Brewer From Water Treatment Inlet Hose BUNN FLOW 90 psig max operating pressure BOM Strainer ELECTRICAL CAUTION-The brewer must be disconnected from the power source until specified. Improper electrical installation will damage electron
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® ™ BUNN Espress OPERATING CONTROLS ES•2C 1 .............. Tank/Boiler Manual Fill Button 2 .............. Pressure Gage 3 .............. Hot Water Wand 4 .............. Tank Water Level Gage 5 .............. Hot Water Wand Control Knob 6 .............. Espresso Group Head 7 .............. Cup Warmer Tray 8 .............. Steam Wand Control Knob 9 .............. Power Indicator Lamp 10 ............ Main Power Switch 11 ............ Steam Wand 12 ............ Drip Tray 13 ............ Drip Tray
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® ™ BUNN Espress ADJUSTMENTS ES•2C INFUSION The brewer leaves the factory set to yield these approximate amounts of water: One Half-Cup ................... 50 cc. Two Half-Cups ................. 100 cc. One Full-Cup .................... 100 cc. Two Full-Cups.................. 200 cc. To change the factory set amounts: 1. Place the program switch in the “Program” (right) position. The brew indicators may glow (see preinfusion section below). 2. Place the desired amount of espresso grind coffee
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® ™ BUNN Espress OPERATION ES•2C ESPRESSO BREWING 1. Determine the batch size to be made. 2. Place the desired amount of espresso grind coffee in the appropriate filter holder (1 or 2 cups), shake it gently to level the bed, and using a tamper, compress the coffee. 3. Clean all coffee particles from the edge of the filter holder. 3. Raise the prepared filter holder up into the desired group head and twist it to the right (counterclockwise) until tight. Do not use excessive force. 4. Press the
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® ™ BUNN Espress BREWING TIPS ES•2C GENERAL Good espresso is identified by its taste, aroma, and the manner in which it is served. All of these elements can be improved-upon to serve your customers a better product. BEAN SELECTION The selection of a blend of coffee is a matter of personal choice. A blend with a high proportion of Central and/or South American beans results in a beverage with a soft and agreeable flavor. A blend with a high proportion of African, Arabian, or Indonesian beans
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® ™ BUNN Espress CLEANING ES•2C FILTER HOLDER CLEANING Bunn-O-Matic recommends daily cleaning for your espresso brewer using the following steps: 1. Place the one-cup basket into the filter holder. ® 2. Put a teaspoon of any granular espresso cleaner or automatic dish washing detergent (such as Cascade ) into the basket. 3. Lock the filter holder into the right group head. As if you were brewing espresso. 4. Press the right continuous flow button to begin the cleaning process. After about 20 s
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® ™ BUNN Espress ALARMS ES•2C ONE BREW INDICATOR FLASHING (EITHER SIDE) This alarm flashes when either flow meter has not sent impulses to the electronic control unit for more than five seconds. All functions will stop and the lamp will begin to flash if brewing a programmed amount. Check the following: A. Coffee ground too fine. B. Obstruction in the group head (dirty screen, blocked orifices, etc.) C. Flow meter and electrical connections. D. Solenoid valve and electrical connections. E. P
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® ™ BUNN Espress ES•2C 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 at (800) 637-8606. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. • Solenoid removal requires interrupting the water supply to the valve. Damage may res
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® ™ BUNN Espress TROUBLESHOOTING ES•2C PROBLEM PROBABLE CAUSE REMEDY Will not brew when any of the Flowmeter Check connections between the batch buttons is pressed. flowmeter and electronic control unit. Replace flowmeter. (Continuous brew works as well as automatic refill.) Check voltage at terminals. If voltage is Solenoid valve present when the dose switch is pressed, disconnect power supply, remove wires from coil terminals and check coil ter- minal continuity. If there is continuity rep
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® ™ BUNN Espress ES•2C TROUBLESHOOTING PROBLEM PROBABLE CAUSE REMEDY Short brew time(less than Coffee ground too coarse Check coffee grind approximately 20 seconds per half-cup). Weak coffee. No Coffee not fresh Use fresh coffee crema. Too little coffee used Adjust amount to taste Coffee not tamped into filter basket Use tamper to press coffee into basket Brewer does not reach oper- ating pressure or does so very slowly. 14
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® ™ BUNN Espress TROUBLESHOOTING ES•2C PROBLEM PROBABLE CAUSE REMEDY problem problem problem 15
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® ™ BUNN Espress PLUMBING DIAGRAM ES•2C 16 W a t e r N C o • n d N i t i TO HEATER CONTROL DUAL PRESSURE GAUGE S P T U E M A SET TO P M ~160 PSI LEGEND COLD WATER FILL LINE CHECK PRESSURE Cold Water VALVE RELIEF PRESSURE VALVE PRESSURE Brew Water SWITCH RELIEF VALVE FLOWMETER Steam (~25 PSI POP-OFF) Hot Water (surrounding tank heater) MANUAL FILL REFILL Components and Item Numbers VALVE SOLENOID (Normally Blocked) HOT WATER TO DRAIN TO REFILL CONTROL STEAM GROUP HEAD GROUP HEAD ~ 18 PSI TEME
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® ™ BUNN Espress WIRING DIAGRAM ES•2C ES•2C L2 L1 GREEN ELECTRONIC PROGRAM SWITCH K1-N.O. CONTROLLER COIL J9-1 A1 A2 POWER IND J8-1 78 GROUP SOL GROUP 56 SOL REFILL 34 SOL 12 PUMP FLOW J7-1 METER REFILL IND POWER SWITCH FLOW J6-1 METER J5-1 LIMIT THERMOSTAT TANK HEATER J4-1 PRESSURE J3-1 SWITCH CONTROL & J2-1 PROBE INDICATOR PANEL J1 CONTROL & INDICATOR PANEL (RIBBON CABLE) 220 VOLTS AC 2 WIRE 10839.0000A 10/94 © 1994 BUNN-O-MATIC CORPORATION SINGLE PHASE 60 HZ 17
