Instruction/ maintenance manual of the product G1 Bunn
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C L E A N I N G L E V E R G R O UN D C O FF EE 1 . S e l e c t t h e de s i r e d g r in d . 2 . L i f t t h e l i d a n d p o u r c o f f e e b e a n s in t o t h e h op p e r . 3 . S l i p b a g u n d e r t h e c h u t e . R e s t t he b a g o n t h e t r a y .
2 10191 070306 BUNN-O-MA TIC COMMERCIAL PRODUCT W ARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor . 2) Electronic circuit and/or control boards: parts and labor for 3 years.
3 SPECIAL R E G U L A R E L E C P E R C A U T O M A T I C D R I P.
4 ELECTRICAL REQUIREMENTS The 120 volt and 240 volt grinders have an attached cordset and requires 2-wire, grounded service rated 120 volts ac and 240 volts ac, 15 amp, single phase, 60 Hz. The 230 volt grinders have a power connector and requires 2-wire, grounded service rated 230 volts ac, 15 amp, single phase, 50 Hz.
5 COFFEE GRINDING 1. T urn the selector knob to align the red arrow with the desired grind. 2. Raise the top lid and add the whole bean coffee. Close the top lid. 3. Locate the back of a bag behind the dispense chute. (The grinder will not operate unless the bag is behind the chute.
6 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 T echnical Ser vice Department.
7 PROBABLE CAUSE 3. Bag Sensor . (cont.) 4. Motor overload protector . 1. Off/On/Start Switch 2. Bag Sensor 3. Relay TROUBLESHOOTING (cont.) PROBLEM Grinder will not start. (cont.) Grinder will not shut off. REMEDY (B) Refer to Ser vice - Bag Sensor Switch for testing and adjustment procedures.
8 TROUBLESHOOTING (cont.) PROBABLE CAUSE 1. Hopper 2. Entrance to grind chamber 3.Shear Plate PROBLEM Grinder starts, but will not dis- pense. REMEDY Coffee must be poured into hopper before grinding. Foreign materials must not block the opening at the bottom of the hopper .
9 CONTENTS Bag Sensor Switch ..............................................9 Motor and Grind Chamber (AC) ........................10 Motor and Grind Chamber (DC) ........................13 Off/On/Start Switch ..........................................
10 4. Disconnect the grinder from the power source. If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness. 5. Check for continuity across the terminals on the bag sensor switch.
11 SERVICE (cont,) AC MOTOR AND GRIND CHAMBER (cont.) WHI/BLU to Relay N.O.(K4) WHI to Cordset (120V) RED/BLK to Cordset (230V) GRN to Ground (120V) GRN/YEL to Ground (230V) P1310 Removal and Replacement - Grind Chamber - Refer to Fig.
12 SERVICE (cont.).
13 17. Ins tal l grind selec tor dial plat e (18) with adju sting scr ew w/be aring (19) onto the gr ind cham ber and secure with two .250”-20 screws (1). 18. Install grind selector knob (17) onto the grind selector dial plate (18). NOTE: Refer to ADJUSTMENTS and reset the burrs.
14 SERVICE (cont,) DC MOTOR AND GRIND CHAMBER - G1MD ONL Y (cont.).
15 SERVICE (cont,) DC MOTOR AND GRIND CHAMBER - G1MD ONL Y (cont.).
16 Location: The Off/On/Start switch is located in the up- per front wrapper above and to the right of the grind selector knob (left side when viewed from rear).
17 + A C A C SERVICE (cont.) Removal and Replacement: 1. Disconnect the wires from the rectifier . 2. Remove the #10-32 screw securing the rectifier to the motor mounting bracket. 3. Remove the rectifier and discard. 4. Install new rectifier on the rear of the motor mounting bracket and secure with a #10-32 screw .
18 Location: The relay is located on the grinder base inside the lower housing. T est Procedure: 1. Disconnect the grinder from the power sour ce and place a coffee bag behind the dispense chute. 2. Check the voltage across the white/orange and white or red/black wires on terminals A & B of the relay with a voltmeter .
19.
20 WHI/VIO WHI/VIO WHI/BLU WHI/ORA 1 or A GRN L1 N SW1 BLK WHI/RED SW2 K 0 or B M L1 L2 120 VOL T AC 2 WIRE SINGLE PHASE 60 HZ WHI WHI K-2 or K-7 K-8 or K-9 K-6 K-4 SCHEMA TIC WIRING DIAGRAM G1, G2 & G3 10190.
21 WHI/VIO WHI/VIO WHI/BLU WHI/ORA SCHEMA TIC WIRING DIAGRAM G1A, G2A & G3A GRN/YEL L1 L2 SW1 BLK WHI/RED WHI/RED SW2 N.O. N.O. M L1 L2 RED (230V) RED/BLK (240V) RED (230V) RED/BLK (240V) 10754.
An important point after buying a device Bunn G1 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn G1 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn G1 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn G1 you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn G1 will certainly help you make a decision on the purchase.
If you already are a holder of Bunn G1, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn G1.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn G1. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn G1 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
