ELECTRO FREEZE Model FM8
184979-17
23
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11 Soft Serve Information
11.1 Overrun
11.2 Rerun
NOTE
: Rerun product is unable to
accept the same amount of air as fresh
product. As a result, the quality will be
affected and product may appear grainy
and icy.
For further information contact your
local Electro Freeze distributor or the
Service Department of H. C. Duke &
Son, Inc., phone (309) 755-4553.
If local health codes permit the use of
rerun make sure to follow these proce-
dures:
1. Store rerun mix in a clean,
sanitized container.
2. Store in a cooler with a tempera-
ture below 4.4
º
C.
3. DO NOT prime the machine with
rerun. Always skim off and discard
foam. Then combine the rerun with
fresh mix in a ratio of 50/50 and add to
the hopper during operation.
4. Once a week run the mix as low
as possible and discard after closing.
This will break the rerun cycle and
reduce the possibility of high bacteria
and coliform counts.
As mix is frozen in the freezing cylinder,
air is incorporated into the mix to in-
crease its volume, as well as enhance
the taste and texture of the finished
product. The increase in volume is called
overrun.
Fifty percent overrun translates
to a volume increase of 50% — 30 liters
of liquid mix has become
45
liters of
finished product.
Controlled overrun is important to
maintain consistency in product quality.
Too much overrun (air) results in a light,
fluffy product lacking the cold refreshing
appeal of a quality product. Too little
overrun results in a wet, heavy product.
To correctly measure the overrun per-
form the following steps:
1. Place an empty liter container on
the scale* and adjust your scale to zero.
2. Remove container from scale and
fill the container with liquid mix to the
top. Weigh and record.
3. Replace liquid mix with frozen
product, being sure to leave no voids or
air spaces in the container.
4. Strike off the excess product so it
is even with the top of the container and
measure the weigh.
5. Use the following formula to figure
overrun percentage:
“Weight of liquid mix minus weight of
frozen product/divided by the frozen
weight. Multiply by 100.” See example.
Example:
Weight of ½ liter of liquid mix
= 510 g
Weight of ½ liter frozen product = 340 g
Difference
= 170 g
170g divided by 340 g
= .5
.5 x 100 = 50% overrun
*Your
Electro Freeze
Distributor can
provide a scale (P/N 158049) that is
graduated in overrun percentage.
