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Istruzioni per l'uso Grindmaster, Modello 250

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Note: Adjusting the grind may alter the portion of coffee dispensed. After grind adjustment, weigh portion and adjust, if necessary (see “How to Adjust the Portion”). Current It is absolutely essential that full voltage and amperage always be available as it takes full power to grind coffee. NEVER connect to an overloaded line or a two or three way plug, otherwise serious damage to the motor may result. Do not use an extension cord. Protection This grinder is equipped with both a circuit breaker and a shear disc release to protect motor and burrs if a foreign object, such as a nail or rock, gets into the coffee. Circuit Breaker This grinder is equipped with a circuit breaker to protect the motor from overloading. When the circuit breaker operates, the reset button will pop out approximately 1/4” which cuts Off the power to the grinder. The reset button is located above the power cord on the back of the grinder. To reset the circuit breaker, push the reset button in. You will hear a click as it resets. If the grinder does not operate after resetting the circuit breaker, there may be an obstruction in the grinding mechanism that is stalling the motor. In this case, the Grinder Head should be cleaned out as described in the Shear Disc Replacement section of this manual. Lubrication All bearings have been oiled for life. No further oiling is necessary. Figure D: Grind Adjustment Page 5 115 & 250 Series Coffee Grinders Cleaning Instructions The outside of the machine can be cleaned with a damp cloth or common household polishing wax. Grinding parts should be cleaned with a stiff brush or dry cloth. Do Not Use Water. See “Shear Disc Replacement” for instructions on assembling and disassembling of grinder parts. Before reassembling, wipe motor shaft with 2 or 3 drops of common household lubricating oil in the area of feedworm engagement to make assembly easier. Removal and Reinstallation of Hopper Assembly 1. Remove Upper Front Plate by removing the four screws in the corners (Shipping bracket must be removed prior to removal of upper hopper assembly. See instructions and diagram below.) 2. Lift Upper Hopper Assembly while rotating the Assembly slightly upward (refer to Figure E). 3. Pull the Assembly forward, toward front of unit and out. Figure E: Upper Hopper Assembly Removal and Reinstallation Shipping Bracket Removal Models 250, 250A and 250AB are equipped with shipping bracket. Remove bracket prior to installation. (See Figure F) Tools Required: 1 Phillips screwdriver. a. Using the Phillips screwdriver, remove the screws and the bracket located at the back of the grinder. b. Do not discard the screws and bracket. The bracket should be re-installed on the grinder prior to transporting or shipping. The bracket may be shipping bracket Figure F: Shipping For Models 250, 250A and 250AB Bracket Removal Model 250 left on grinder, but must be removed prior to servicing. Hopper Reinstallation 1. Ensure the Drive Pins are in vertical position. (See figure G) 2. Ensure that Drive Links are in horizontal position. 3. Insert the rear slots of the Upper Hopper Assembly into the rear tabs of the motor bracket. 4. Rotate Assembly downward. 5. Reassemble Upper Front Plate. 6. Put the (4) screws back into Upper Front Plate and tighten. Figure G: Positioning of the Drive Pins and Drive Links 115 & 250 Series Coffee Grinders Page 6 (86235) (86218) Figure H: Grinder Head Mechanism Shear Disc Replacement If the motor should run and no coffee is dispensed, the shear disc release may have operated. Should this occur, perform the following operations in the sequence given (refer to Figure H). Tools Required: Phillips Screwdriver and Pliers 1. Unplug machine. 2. Remove the Upper Front Plate of the grinder to provide access to the grinder mechanism. 3. Remove the Grind Cap by taking out the 2 Thumb Screws. 4. Pull out the Revolving Burr and Feedworm Assembly. Clean out the Grinder Head, removing all coffee particles from inside of the Grinder Head and the Grinder Cap so that it can be reset properly. 5. Check that no obstruction has been caught on the surface of the teeth of either burr. 6. Remove the Shear Cap and broken pieces of the Shear Disc. You are now ready to reassemble the grinder mechanism. 7. Slide the Burr and Feedworm Assembly back onto the Motor Shaft making certain that the tongue of the shaft engages the slot in the Shear Drive. 8. Insert a new Shear Disc by aligning the slot in the Shear Drive with the slot in the hub of the Feedworm. 9. Reassemble the Shear Cap and Grinder Cap. Make certain the Grinder Cap is screwed on tight and is sealed properly against the head, not cocked. Otherwise a proper grind cannot be obtained. 10. Reassemble the Upper Front Plate. Your grinder is now ready to grind. Page 7 115 & 250 Series Coffee Grinders Troubleshooting Guide The following procedures must be performed by a qualified service technician. CAUTION: Unplug the machine before cleaning or servicing the unit. Problem Possible C...