Bunn ES.1A User Manual

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BUNNEspress TM

ESPRESSO/CAPPUCCINO

COFFEEBREWER

P-176

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

BUNN Espress™

INDEX

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

1

BUNN Espress™

WARRANTY

Model ES•1A™

 

 

 

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

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. This warranty does not apply to any equipment, component or part that was not manufactured by Bunn or that, in Bunn’s judgement, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of Bunn are not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon.

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. If Bunn determines, in its sole discretion, that the equipment does not conform to the warranty, Bunn shall repair the equipment with no charge for parts during the one year warranty period and no charge for labor by a Bunn Authorized Service Representative during the one year warranty period. If Bunn determines that repair is not feasible, Bunn shall, at its sole option, replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AS SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND. Bunn shall not be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

2

BUNN Espress™

USER NOTICES

Model ES•1A™

 

 

 

The notices on this brewer should be kept in good condition. Replace unreadable or damaged labels.

This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).

00656.0000

WARNING

HAZARDOUS

VOLTAGE

UNPLUG BREWER

BEFORE REMOVING!

12652.0000

CAUTION

HOT

Liquid-Steam-Surfaces

24246.0000

NOTICE

160 psig max operating pressure

24247.0000

! WARNING

Fill water tank before turning -on thermostat or connecting appliance to power source.

Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis.

Follow national/local electrical codes. Do not use near combustibles.

FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE, OR SHOCK HAZARD

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

3

BUNN Espress™

FEATURES

Model ES•1A™

 

 

 

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. The outlet tubes can also be rotated.

HOT WATER RINSE

P-157

Boiler

The boiler is made of copper plating, 1.5 mm thick; it operates under a pressure between 1.1 to 1.3 bar (16-18.8 psi). This is measured by means of a pressure gauge with a scale from 0 to 2 bar (0-29 psi). The safety valve assures that boiler pressure never exceeds the safety limits; it automatically discharges steam when pressure inside the boiler exceeds 1.8 bar (26.1 psi). The water heating element is an electric resistance unit controlled by a pressure switch. This switch automatically regulates the pressure of steam in the boiler. The pressure switch will automatically shut off the heater when necessary.

Electrical pump

The electric pump incorporated in the machine is required to obtain optimum water pressure of 9 bar (130 psi) for espresso extraction. If water pressure from the tap exceeds 5 bar (73 psi), a pressure reducer should be installed to avoid damaging the machine. If a pressure reducer is required, it should be installed in the water inlet pipe just before the water conditioner or electric-pump.

4

BUNN Espress™

FEATURES

Model ES•1A™

 

 

 

7

6

11

10

1

P-158

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). This is when the brewing process (infusion) begins.

The bubbling effect is produced by an interchange between air, contained in a bubble formed in the chamber, and water which progressively increases it’s pressure on that bubble. The mixture of air and water produced then falls on coffee previously dampened by the infusion process. When the liquid extraction process of the coffee is complete, excess pressure contained in the filter holder is then released through a discharge valve (2). The atomizer (1) directs the water being discharged to the opening to avoid it’s splashing outward.

Water softener

It is essential to install a water softener to prevent any calcium build up in the boiler and hydraulic circuit.

5

BUNN Espress™

FEATURES

Model ES•1A™

 

 

 

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)

Remove the side panel (3) by lifting it up carefully.

By loosening the nut (4) that holds the control panel in position and by placing the front piece at a right angle, access to the interior of the control panel is obtained.

Finally, by removing the work tray (5) and the drainage tray (6), access is gained to all the elements of the machine.

2

4

1

3

 

 

6

 

 

 

5

 

 

 

 

P-159

Technical features

 

 

 

Width .........................

400 mm(15.7 inches)

Drainage ....................

25 mm (1.07 in)

Height ........................

370 mm(14.5 inches)

Total brewer power ....

2000 W.

Depth .........................

490 mm(19.3 inches)

Electric feed ...............

120 V. Single phase

Net weight .................

30 kgs(66.12 lbs.)

Consumption .............

16.7 A.

Gross weight .............

37 kgs(81.55 lbs.)

Boiler capacity ...........

4.0 liters (1.05 gal)

Hydraulic feed ............

38"-19 Straight pipe BSPP

 

 

6

BUNN Espress™

 

 

FEATURES

 

Model ES•1A™

 

 

 

9

10

11

12

13

8

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

6

 

 

 

 

 

 

15

 

 

 

 

 

 

 

14

5

 

 

 

 

 

 

16

 

 

 

 

 

 

 

P-161

4

 

3

2

1

 

 

 

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

.................. Pressure gauge pump/steam

 

 

8

.................. Group head espresso extraction chamber

9

.................. Cup-heater tray

 

 

 

10

................ Power light

 

 

 

11

................ Refill light

 

 

 

12

................ Automatic dosification selector panel

 

13

................ Continuous flow control button

 

14

................ Program/Run toggle switch

 

 

15

................ General ON/OFF switch

 

 

16

................ Drainage tray

 

 

 

 

 

 

 

7

 

 

 

+ 19 hidden pages