5.6
Determining Water Usage Requirements
The PLC in the Sentry II is supplied with a potentiometer that allows the volume of fill water to be
adjusted for each specific installation. As the timer is turned clockwise to increase the volume of wash
water, it automatically increases the electric drain time to ensure adequate drainage at the end of each
cycle. See Figure 31.
There are two factors that must be considered when determining the amount of water required during
the wash cycle:
a.
The first requirement is to ensure there is sufficient water to prevent cavitation of the wash pump.
See Table 4 for minimum water requirements.
b.
The second requirement is to ensure that there is sufficient water to maintain a minimum drain
temperature of 115°F (46°C) at the end of the hot-detergent wash cycle. The volume of water
required to satisfy the minimum drain temperature will vary depending on the surface area and
temperature of the milk cooler and the inlet supply water temperature. The installation technician
will need to adjust the fill water volume until the minimum drain temperature is achieved for the
hot-detergent cycle.
Figure 31 - PLC Fill-Time Potentiometer
Sentry II with Auto-Dosing Assembly Operating Instructions
37
Effective April 1, 2000
The fill-time potentiometer
increases or decreases the
amount of water admitted for
each cleaning cycle.
Turned to the far
counterclockwise position, the
fill-time is regulated at 3
minutes.
Turned to the far clockwise
position, the fill-time is
regulated at 15 minutes.
Time the actual fill cycle and
refer to Table 5 for calculated
water usage.
NOTE: The maximum
adjustment rotation for the
fill-time potentiometer is
less than one turn. Do not
force it beyond stops!
Summary of Contents for SENTRY II
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