Grindmaster 250, 115 User Manual

Grindmaster 115 and 250 Series

Coffee Grinders

Operation and Instruction Manual

for

Models 115A, 115AB, 250, 250A, 250AB & 250-3A

Table of Contents

Installation Instructions ................................2

Set-up Procedures........................................2

How to Operate ............................................2

Timer Adjustment..........................................3

Grind Selector™ ..........................................4

Coffee Grind Profile, Grind Adjustment ........5

Current, Protection, Circuit Breaker ............5

Lubrication ....................................................5

Cleaning Instructions ....................................6

Removal and Reinstallation

of Upper Hopper Assembly ..........................6

Shear Disc Replacement..............................7

Troubleshooting Guide ..............................8-9

Exploded Views ....................................10-12

Wiring Diagram......................................13-15

Grindmaster Corporation™

4003 Collins Lane
Louisville, Kentucky 40245 USA
[phone] [phone]
[phone] (Technical Service)
FAX [phone]
www.grindmaster.com

© Grindmaster Corporation, 1998
Printed in the USA

1004 Form # GR-373-03

Part# 85358

Prior authorization must be obtained
from Grindmaster Corporation for all
warranty claims.

Model 250

Model 115

115 & 250 Series Coffee Grinders Page 2

Installation Instructions

1. Please read this manual before operating the grinder.

2. Carefully remove grinder from carton.

3. Place grinder in position on shelf, counter or flat surface.

4. Plug grinder into standard electrical outlet. Avoid using an extension cord.

5. Grind a small amount of whole bean coffee following operating instructions as described in this manual.

6. If there is any problem, consult the

Trouble Shooting Guide

in this manual and also on the back of your grinder.

7. If you still cannot correct a problem, call Grindmaster Corporation’s Technical Service Department for help,

[phone] M-F 8 AM - 6 PM EST

.

Instructions

Your new coffee mill is easy to operate and maintain. Before you place it in service, please have all personnel
familiarize themselves with these instructions; then keep this manual in a convenient place for ready reference.

Set-up Procedures

1. You, the user, must determine the quantity of coffee you want to dispense as various types of coffee and
brewing equipment require different quantities to obtain a quality cup of fresh ground, fresh brewed coffee.

Note: Because of the inherent properties of some decaffeinated coffee, it may be necessary to dispense a
slightly greater amount to achieve the desired level of flavor extraction as in regular coffee. This should be
evaluated based on the coffee you use as well as the brewing equipment used.

2. Adjust the timer inside the grinder if necessary, to dispense the desired weight of ground coffee (see Timer
Adjustment Section on page 3). All grinders are factory set to deliver approximately 2 ounces of ground coffee.
This weight is approximate, as the density of all coffee beans is not the same. The only way to ensure the
desired portion is being dispensed is to weigh the coffee after it has been ground.

3. The grind texture can be adjusted, if necessary, to a finer or coarser grind (see “Grind Adjustment” section on
page 5). The grind is factory set to deliver a standard autodrip grind.

How to Operate

1. Fill the hopper with the appropriate amount of whole bean coffee.

2. Place the brew basket with coffee filter on rails (or basket arms).

3. Choose the type of coffee you wish to grind by pressing the rocker selection switch.

4. Push the start button on the front of the grinder.

5. When grinder stops, remove the brew basket.

Page 3 115 & 250 Series Coffee Grinders

Timer Adjustment

The Timer is preset at the factory, but should adjustments be required, follow the instructions below to set the
grind times.

Note: The grinder power must remain ON for timer adjustments.

Digital Grinder Timer Adjustments (All Models)

1. To access timer, remove the timer cover by removing the mounting screws and pulling the cover away from the
casing.

2. To light up the display on the board and check the time setting, depress either one of the two square buttons
located next to the display one time.

3. To change the displayed setting, press and hold either the left or right square button until the desired setting is
reached. The left button lowers the displayed value; the right button increases the displayed value. The time
values are set in seconds and tenths of a second.

4. Refer to Figure A above for approximate timer settings.

Note: For accuracy you must weigh the coffee and make appropriate adjustments.

5. In order to store this desired value you must press the grinder start switch once.

Note: If start switch is not pushed, the last value stored will be used when you return to grinding mode.

6. Once the timer is adjusted, reinstall the timer cover.

Figure A

115 & 250 Series Coffee Grinders Page 4

Grind Selector™

For Models 115AB and 250AB

Models equipped with a Grind Selector are designated with a “B” at the end of the model number (Model 115AB &
250AB). If your grinder is equipped with a Grind Selector, refer to the following information:
The Grind Selector allows you to set the grinder to coarse or fine on any of the 250AB four grind selections: regular
small, regular large, decaf small or decaf large.

The following are some recommended use conditions:

Coarser Settings Regular Settings

Larger portions - 8 oz or more Smaller portions - 7 oz. or less
(urns) (bottle brewers or airpots)
Decaffeinated coffee Regular coffee

The fine grind setting on this grinder has been pre-set at the factory to deliver coffee ground to normal drip
specifications. Should you wish to make an adjustment please follow these steps:

To Adjust the Fine Grind

For Models 115AB and 250AB

Tools Required: Adjustable Wrench, Phillips Screw Driver, Large Blade Screwdriver

1. Unplug grinder.

2. Remove upper front plate.

3. Loosen the fine grind adjusting screw lock nut (refer to Figure B).

4. Hold solenoid shut while turning adjusting screw clockwise to
make the grind finer, counter-clockwise to make the grind coarser
(refer to Figure B). We recommend that you do not turn the
adjusting screw more than two notches on the scale before
testing the new grind setting.

NOTE: Be sure that when adjusting the grind that you do not adjust too fine, causing the burrs to touch each other
(a sound of metal scraping metal). This could cause damage to the burrs or motor.

5. After the adjustment has been made, tighten adjusting screw lock nut. Do not allow the fine grind adjusting
screw to expose more than three threads on the outer side of the arm or it could loosen during operation.

6. Assemble front plate to front of the grinder.

To Adjust the Coarse Grind

For Models 115AB and 250AB

Tools Required: Adjustable Wrench, Phillips Screw Driver, Large Blade Screwdriver

1. Unplug grinder.

2. Remove upper front plate.

3. Loosen the fine grind adjusting screw lock nut (refer to Figure C).

4. Pull the solenoid plunger toward you until it contacts the coarse
grind adjusting screw. (refer to Figure C) Then turn the adjusting
screw clockwise to make the grind finer, counter-clockwise to
make the grind coarser. We do not recommend that you turn the
adjusting screw more than one and a half turns before testing the new grind setting.

5. After the adjustment has been made, tighten the adjusting screw lock nut.

6. Assemble front plate to front of grinder.

Figure B: Fine Grind Adjustment

Figure C: Coarse Grind Adjustment

Fine grind

adjustment

screw

Coarse grind

adjustment screw