Pellerin Milnor Corporation 27
and includes the injection of alkali and detergent. Suds and bleach suds steps follow the break
step.
Carryover steps use the chemicals retained in the goods after draining the previous step to prolong
chemical contact at a higher temperature without introducing more chemicals. The drain prior to
a carryover step also removes suspended soil and reduces bath alkalinity for better bleaching.
07=Hot wash This step type causes the machine to fill exclusively through the hot water valve.
Generally, the bath temperature should be as hot as is practical for suds baths, with some con-
siderations. While higher temperatures increase the effect of detergents, there is a risk of set-
ting certain stains if they were not sufficiently removed with earlier, cooler baths. High bath
temperatures may also introduce creases into some synthetic fabrics by heating the fibers
above the temperature at which they become plastic. When this happens, rapid cooling will
often set the creases beyond the ability of other equipment to remove them. For the best ef-
fect, introduce chlorine bleach when the bath temperature is about 150 degrees Fahrenheit (66
degrees Celsius). Bleaching with chlorine at temperatures above 160 degrees Fahrenheit (71
degrees Celsius) is likely to damage fibers.
08=Cold wash This step type uses only water at or near the temperature at which it entered the
plant. In especially warm climates, this water may be at or above the temperature achieved by
using split water in other areas. Program a cold wash any time the split water temperature
might cause undesired results, including wrinkles or fiber damage.
09=Split wash This type of step fills the machine by fully opening both the hot and cold water
valves simultaneously. This results in the fastest possible fill and a bath temperature that is
satisfactory for many applications. While certain factors such as pressure differences between
hot and cold water supplies cannot be predicted, the approximate temperature of split water
will be one half of the total of both the hot and cold water temperatures.
2.3.3.6.1.5 Rinse (TT=10, 11, or 12)
BNCXUP12.C20 0000208531 A.5 D.3 A.4 1/2/20 1:35 PM Released
Bath operations between the bleach step and the finish step are usually called rinses. Rinses serve
to remove the last of the loosened soil and most of the chemicals from the goods. In machines
with the E-P Express® controller, rinse steps are always performed at high water level and the
programmed temperature. This controller also allows the injection of any desired chemicals dur-
ing rinse operations.
10=Hot rinse Rinsing with hot water removes more detergent and other chemicals from the
goods than a cold or split rinse, but also may have many of the same adverse affects as a hot
wash. Consider the temperature of the hot water supply and the goods being laundered when
programming this type of step.
11=Cold rinse Use a cold rinse to remove most of the remaining chemicals from the goods
without the energy cost of hot water. Keep in mind, however, that a cold bath immediately
following a hot bath may thermoset creases in some synthetic fabrics.
12=Split rinse Because both the hot and cold water valves are open for a split rinse, the fill
time is approximately half of the time required for either a hot or cold rinse. Also, there is less
chance for fabrics to crease than with a hot rinse, and more remaining soil and chemicals are
removed than with a cold rinse.
Programming
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