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BUNNEspress
TM
ESPRESSO/CAPPUCCINO
COFFEE BREWER
DISCONTINUED VERSION
The information in this manual
is no longer current.
P-176
ES•1A
ES•1A
TM
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10712.0000A 7/93 ©1993 Bunn-O-Matic Corporation
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Summary of Contents for Bunn Espress ES-1A
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Page 1: Coffee Brewer
COFFEE BREWER DISCONTINUED VERSION The information in this manual is no longer current. P-176 ES•1A ES•1A OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 10712.0000A 7/93 ©1993 Bunn-O-Matic Corporation... -
Page 3: Table Of Contents
INDEX BUNN Espress™ Model ES•1A™ Warranty ...2 User notices ...3 Features ... 4-9 Installation ...10 Initial setup/use ... 11 Programming ...12 Cleaning ...13 Trouble-shooting ... 14-15 Schematic-plumbing ...16 Schematic-electrical ...17 Replacement parts ... 18-25 Frequency of cartridge change ... 26-28... -
Page 4: Warranty
The Buyer shall give Bunn prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois, 62708-3227. If requested by Bunn, the Buyer shall ship the defective equipment prepaid to an authorized Bunn service location. -
Page 5: User Notices
FAILURE TO COMPLY RISKS EQUIPMENT 160 psig max operating pressure DAMAGE, FIRE, OR SHOCK HAZARD 24247.0000 READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000F 3/98 © 1988 BUNN-O-MATIC CORPORATION 00831.0000... -
Page 6: Features
BUNN Espress™ Hot water rinse dispensing tube and steam dispensing tube The ES•1A™ is equipped with a hot water rinse dispensing tube and a steam dispensing tube. They are operated by moving the levers located at the bottom of the machine from to side-to-side; they can be placed in a continuously open position if required. - Page 7 BUNN Espress™ Group head (Espresso extraction chamber) The group head-espresso extraction chamber is where the coffee infusion takes place. After extraction, an electric pressure valve automatically discharges the accumulated pressure. When the coil (12) of the electro-valve receives an electric current, causing the plunger (10) to move, thus closing the discharge valve (2) and opening the water intake valve (9) allowing the water to pass towards the shower (4) through the sprayer (3).
- Page 8 BUNN Espress™ Chassis The chassis of the ES•1A™ is made of painted steel and the work tray is stainless steel. To reach the interior of the machine, proceed as follows: • Remove the cup heater tray (1) • Loosen the two screws (2) holding the side panel in place (2) •...
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Page 9: Component Identification
BUNN Espress™ Component identification 1 ... Hot water rinse outlet control lever 2 ... Steam outlet control lever 3 ... Hand grip-filter container for coffee 4 ... Work tray 5 ... Steam outlet tube 6 ... Hot water rinse outlet tube 7 ... - Page 10 BUNN Espress™ Warning alarm (visual only, not audible) on flow counter This alarm goes off when impulses from the flow meter are not registered by the central control unit, or when a period in excess of five seconds lapses between impulses from the flow meter . If the brewer is running (i.e.
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Page 11: Features
BUNN Espress™ Central/Electronic unit This component analyzes and controls all information received from the buttons and volumetric counter, activating the different relays and thus causing the different electric valves and the electric pump to start functioning. The connections of the central unit, as shown on the diagrams, are divided into two parts. First of all, the connections that are marked with a zero plus a number correspond to the power feed and to the output. -
Page 12: Installation
BUNN Espress™ Placement and installation Once the machine has been unpacked, it should be placed on a table or counter having sufficient space for easy access to water, electricity and drainage per the following specifications. • A water inlet pipe. -
Page 13: Coffee Extraction
BUNN Espress™ Filling 1. Make sure power switch is OFF and water is connected and turned ON before plugging in. NOTE - Plumbing must be connected to the brewer before proceeding. 2. Locate the ON/OFF switch knob. It is in the upper right corner of the front panel. -
Page 14: Programming
BUNN Espress™ volumes are slightly less. Should different volumes be required, refer to (Programming dosifications) Control panel This panel is composed of five buttons (A, B, C, D, and E) and a pilot lamp (F). The buttons A, B, C and D correspond to the selections of four possible dosifications. -
Page 15: Cleaning
The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Clean the gasket that seals the filter & the group head, located under the group head. Ground coffee buildup on this gasket will result in a bad seal of the filter holder, and will leak brewed coffee onto the outside of the filter holder when brewing. -
Page 16: Troubleshooting
BUNN Espress™ 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 1-800-637-8606. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. - Page 17 BUNN Espress™ Problem Brew cycle will not start (cont.) Water is not hot or long recovery time. TROUBLESHOOTING Probable cause Solenoid valve Pump Solenoid valve Limit thermostat(s) Tank heater Model ES•1A™ Remedy Check voltage at terminals. If voltage is present when the dose switch is pressed,...
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Page 18: Schematic-Plumbing
SCHEMATIC-PLUMBING BUNN Espress™ Model ES•1A™ 1 ... Electric pump 2 ... Check valve 3 ... Refill solenoid 4 ... Flowmeter 5 ... Steam valve 6 ... Hot water rinse valve 7 ... Liquid level probe 8 ... Pressure relief valve 9 ... -
Page 19: Schematic-Electrical
BUNN Espress™ SCHEMATIC-ELECTRICAL SCHEMATIC WIRING DIAGRAM TANK HEATERS 1785 @ 120V TOTAL WATTS ELECTRONIC CONTROLLER GRN/YEL (RIBBON CABLE) ES•1A GREEN A B C D CONTROL SWITCH 1 2 3 4 PRESSURE THERMOSTAT GROUP REFILL PROGRAM PUMP PROBE FLOW METER CONTROL &... -
Page 20: Replacement Parts
REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Drip tray guide (left) ... 23654.0000 2 ... Pressure gauge ... 24210.0000 3 ... Pressure gauge mounting bracket ... 24212.0000 4 ... Locating pin-lower side panel ... 23648.0000 5 ... Side panel (left) ... 23669.0000 6 ... - Page 21 REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Inlet water fitting ... 23609.0000 2 ... Grommet liquid level probe ... 23608.0000 3 ... Terminal block ... 22814.0000 4 ... Probe, liquid level ... 23607.0000 5 ... Compression nut, level probe ... 23629.0000 6 ...
- Page 22 REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Cover, group solenoid discharge ... 23642.0000 2 ... Screw-handle ... 24005.0400 3 ... Filter holder seal gasket ... 23594.0000 4 ... Sprayhead screen ... 23593.0000 5 ... Sprayhead ... 23592.0000 6 ... Group head ... 23641.0000 7 ...
- Page 23 REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Drain plug ... 23674.0000 2 ... Flat washer ... 24030.0002 3 ... Pressure spring ... 23573.0000 4 ... Flat washer ... 23936.0000 5 ... Screw ... 24005.0002 6 ... Lock washer ... 24025.0301 7 ...
- Page 24 REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Refill solenoid end fitting-outlet ... 23569.0000 2 ... Refill solenoid-complete 110v..23568.0000 3 ... Refill solenoid end fitting-inlet ... 23567.0000 4 ... Knob, selector switch ... 23566.0000 5 ... Screw ... 23935.0000 6 ...
- Page 25 BUNN Espress™ REPLACEMENT PARTS Figure Description 1 ... Filter support wire ... 22819.0000 2 ... Filter holder ... 23632.0000 3 ... Dispense nozzle-2 cups ... 23551.0000 4 ... Cover, dual dispenser nozzle ... 23550.0000 5 ... Screw ... 23932.0000 6 ... Handle ... 23644.0000 7 ...
- Page 26 BUNN Espress™ REPLACEMENT PARTS Figure Description 1 ... Screw ... 24004.0700 2 ... Electronic module 110v..24798.0000 3 ... Mounting nut, electronics model ... 24045.0101 4 ... Cable protector, electronics model .. 23631.0000 5 ... Module bracket support ... 23627.0000 6 ...
- Page 27 REPLACEMENT PARTS BUNN Espress™ Figure Description 1 ... Copper tube, pump inlet ... 23623.0000 2 ... Copper tube, pump out to rlf. chk..23622.0000 3 ... Lower copper tube, exch. to grp..23621.0000 4 ... Copper tube, rlf./chk. to flowmeter .. 23620.0000 5 ...
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