BUNNEspress ® ES•2C OF ™ F ON N IO UT s CA T urface HO -S team id-S Liqu 0 0 0,5 1 4 8 1,5 CL 2 2 2,5 12 16 bar 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.
BUNN Espress ® GENERAL ES•2C ™ User notices......................................................................................................................... 3 Site Requirements ............................................................................................................... 4 Installation ........................................................................................................................... 5 Operating Controls.....................................................
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.
BUNN Espress ® SITE REQUIREMENTS ES•2C ™ PHYSICAL The brewer is for indoor use only on a sturdy counter. It is 261⁄2” (67 cm) wide,16” (40.5 cm) tall, and 191⁄2” (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 (1.56.5 bar) from a 1⁄2” or larger supply line. Install a valve in the water line before the brewer.
INSTALLATION BUNN Espress ® ES•2C ™ PLUMBING Install the brewer as indicated below FROM WATER SUPPLY WATER STRAINER ASSY. 24682.0000 Adaptor INLET HOSE 24684.0000 Sealing Washer 23820.0000 Strainer Assy. 24684.0000 Sealing Washer 24683.0000 Adapter To Espresso Brewer Inlet Hose From Water Treatment FLOW BUNN 90 psig max operating pressure BOM Strainer ELECTRICAL CAUTION-The brewer must be disconnected from the power source until specified.
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 Grate 14 .
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.
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.
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.
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.
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.
BUNN Espress ® TROUBLESHOOTING ES•2C ™ 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.
TROUBLESHOOTING BUNN Espress ® PROBLEM PROBABLE CAUSE ES•2C ™ REMEDY Check connections between the flowmeter and electronic control unit. Replace flowmeter. Will not brew when any of the Flowmeter batch buttons is pressed. (Continuous brew works as well as automatic refill.) Solenoid valve Check voltage at terminals. If voltage is present when the dose switch is pressed, disconnect power supply, remove wires from coil terminals and check coil terminal continuity.
BUNN Espress ® PROBLEM TROUBLESHOOTING PROBABLE CAUSE Short brew time(less than Coffee ground too coarse approximately 20 seconds per half-cup). Weak coffee. No Coffee not fresh crema. Too little coffee used Coffee not tamped into filter basket Brewer does not reach operating pressure or does so very slowly.
BUNN Espress ® TROUBLESHOOTING PROBLEM PROBABLE CAUSE REMEDY problem problem problem 15 ES•2C ™
REFILL SOLENOID W a t er C o nditioning Systems B•U•N•N ™ PUMP W/ADJUSTABLE PRESSURE RELIEF VALVE SET TO ~150 PSI TO REFILL CONTROL TO DRAIN PRESSURE RELIEF VALVE COLD WATER TO STEAM WAND STEAM VALVE STEAM ~ 18 PSI TEMERATURE ~ 250 F¡ TO HOT WATER FAUCET STEAM VALVE PRESSURE SWITCH TO STEAM WAND HEAT EXCHANGER TUBE FLOWMETER FAUCET VALVE PRESSURE RELIEF VALVE (~25 PSI POP-OFF) COLD WATER FILL LINE T E A M MANUAL FILL VALVE (Normally Blocked) P U M P TO HEATER CONTROL TANK HEATER
BUNN Espress ® WIRING DIAGRAM ES•2C ES•2C ™ L2 L1 GREEN ELECTRONIC CONTROLLER PROGRAM SWITCH K1-N.O. COIL J9-1 A1 A2 POWER IND J8-1 GROUP SOL GROUP 7 8 5 6 3 4 1 2 SOL REFILL SOL PUMP J7-1 J6-1 FLOW METER REFILL IND POWER SWITCH FLOW METER J5-1 LIMIT THERMOSTAT TANK HEATER J4-1 PRESSURE SWITCH J3-1 J2-1 CONTROL & INDICATOR PANEL PROBE J1 CONTROL & INDICATOR PANEL (RIBBON CABLE) 10839.
