Grindmaster AM-344-04 Adjustments, Temperature Adjustment, Brew Volume “br”, Pulse Brewing “P-b”

Adjustments

All adjustments to machine are accessible through the front display(s). Refer to specifics below and the Programming Routine section. All values are preset at the factory and may vary brewer to brewer.

Temperature Adjustment

Tank temperature can be adjusted from 170°F – 205°F (77°C – 96°C) through the front display. See Programming Routine section for procedure.

Brew Volume “br”

Brew time can be set for each size visually. See Setting Brew Volume Procedure below. Brew time can also be adjusted through the display. See Programming Routine section.

Setting Brew Volume Visually

1.Remove brew basket and place container under brew head.

2.Press and hold desired brew button for 5 seconds. Display will read “Pro”.

3.Within 20 seconds, press and release desired brew button. Water will dispense from spray head and time will count-up in display.

4.When volume is at desired amount, press and release brew button to stop flow. Time will flash in display.

5.Within 20 seconds, press and release desired brew button. Display will clear and brew time will be stored into memory.

Note: During this routine, no pulsing or bypass will occur.

Note: If the On/Off button is pressed during procedure, time setting will default to previous time.

Pulse Brewing “P-b”

Within the Programming Routine, the number of pulses, pulse-on-time, and pulse-off-time for each size brew cycle can be set. During the pulse-off cycle, water shuts off to the coffee grounds. During this period, the grounds in the brew basket absorb water causing the coffee bed to rise. With a larger bed of coffee in the brew basket, remaining water from spray head has more contact area with grounds causing greater extraction of finished coffee.

Note: Adjusting pulse values will not affect the finished brew volume. The brew time, however, will be automatically extended by the amount of total pulse OFF time.

See Brew Routine Section for examples.

Ratio “rto”

The ratio of the bypass flow rate versus the spray head flow rate is factory set. This number, however, rarely needs to be adjusted.

To find the proper value for the ratio:

1.Within the Programming Routine, set the bypass % to the maximum number allowable.

2.Remove the brew basket.

3.Prepare two containers to measure volume from both the spray head and bypass.

4.Press “Large” brew button to begin dispensing water.

5.After a minute or two, cancel the brew cycle by pressing the “Large” brew button or pressing the On/Off button.

6.Measure the volume of both containers.

7.Divide the bypass amount by the spray head amount. This number is to be entered as the new ratio (ex. “.45”).

8.Access the settings routine and adjust to the new ratio number.

Note: If the ratio number is accurate, changing the bypass percent will not require resetting brew time.

Note: Approximate ratio numbers:

.45 for standard spray head models

.64 for gourmet spray head models

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