SECTION 4

MAINTENANCE INSTRUCTIONS

4.1 PRODUCT CONSISTENCY ADJUSTMENT

The freezer's control system monitors the consistency (firmness) of the product (mix) in each freezing cylinder. The program module senses the consistency of the product and shuts off the drive motor and refrigeration system when the pre-programmed consistency is reached. The control panels on the front of the freezer allow the operator to adjust each freezing cylinder to create the desired product consistency.

A. Place the Main Freezer Power and Freezing Cylinder OFF/ON switches in the ON position.

B. Press the SET button on the Control Panel once. Fine Adj will appear on the LCD screen.

C. Press the up arrow button (⇑) until the desired consistency setting is displayed. The higher the number, the greater the product consistency. The control may be set from 1 to 9. Each time the up arrow (⇑) button is pressed, the value will increase by 1 until the value reaches 9, then restart at 0. The 0 setting cannot be set.

D. Press the SET button once to save the setting change and return to the current mode display.

Fine Adj 1-9 5

Figure 28. Product Conststency Control

4.2 LOCKING OUT CONTROL PANEL

The IntelliTec control has a tamper proof mode to prevent unauthorized use. When set, all buttons on the control panel are disabled. To lock out the control panel:

A. Press and hold the PUSH TO FREEZE button for 5 seconds.

B. While still holding the PUSH TO FREEZE button, press the CLEAN button once.

C. Release both buttons. An astrisk (*) will apear after the word MODE on the display, indicating that the control is in the lock out mode.

D. To unlock the control panel, repeat steps A, B and C.

4.3 OVERRUN ADJUSTMENT

The product when served is a combination of air and mix. Overrun is a measure of the amount of air blended into the mix.

Overrun can be expressed in terms of the amount of weight loss for a given volume. For example, if a pint of liquid mix weighs 18 ounces (510 grams) and a pint of frozen product with air added weighs 12 ounces (340 grams), the overrun is said to be 50 percent "18 oz. (510 grams) - 12 oz. (340 grams) = 6 oz. (170 grams)", (6 /12) x 100 = 50%.

The overrun can be checked by placing a one pint container on an ice cream scale and zeroing out the scale. Then fill a one pint container with frozen product. The container should be filled over the top and leveled with a straightedge. The product should not contain any air pockets. When weighed on an ice cream scale, one pint (473 milliliters) of product should weigh 12 to 13 ounces (340 to 368,5 grams).

The mix pump has been preset at the factory to produce a product with approximately 40% overrun. Because of differences in mix formulation, temperatures and barometric pressure, this figure may vary. It will be necessary for approximately 2 gallons (7,5 liters) of mix to be pumped thru the freezer before changes in the product are noticeable due to adjustments in overrun.

Overrun is controlled by the length of the air compressor piston stroke within the piston cylinder. Lengthening the stroke within the cylinder will increase overrun. Con- versely, shortening the stroke will decrease overrun. To perform an overrun adjustment, refer to the following procedure:

A. Turn the mix pump switch to the OFF position. Disconnect both power sources/circuit breakers.

B. Remove the lower back panel from freezer.

C. On air compressor side of pump, locate the long/ slender piston rocking arm. The rocking arm downward travel is limited by a stationery cam. On the face of the cam there is an overrun setting indicator plate numbered 3 thru 8 and an adjustment knob. Figure 29.

Overrun AdjustmentÊ

Figure 29. Overrun Adjustment

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