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puts.
• MIN - The lowest sensor value of all the case tem-
perature inputs.
• MAX - The highest sensor value of all the case tem-
perature inputs.
• MIX - A mixture of two inputs, the ratio of which is
determined by the Mix % field (see Mix Percentage
below).
• FIRST - The lowest-numbered input that is not
shorted, open, or otherwise invalid, will be used as
the case temperature input.
Temperature Setpoint
This field is significant only when using the
Temperature compressor control strategy.
The temperature setpoint is the circuit tem-
perature to which the CUB will attempt to con-
trol the cases. Along with the Temperature
deadband, the CUB uses this setpoint to deter-
mine when to activate the compressor and when
to deactivate it. Refer to Section 6.1.2., Case
Temperature Compressor Control, for more on
how the temperature setpoint works.
Temperature Deadband
This field is significant only when using the
Temperature compressor control strategy.
The temperature deadband is a range of tem-
peratures equally above and below the setpoint
within which the case circuit temperature is con-
sidered to be acceptable. While within this
range, the compressor will remain in its current
state until the temperature input value triggers a
change by moving above or below the deadband
range. Refer to Section 6.1.2., Case Temperature
Compressor Control, for more on how the tem-
perature setpoint works.
Mix Percentage
The Mix % field is significant only if you
have selected Mix in the Combination Method
field. This field determines what mix ratio will
be used to combine temperature input #1 with
input #2. The Mix strategy adds x% of #1 to
(100-x)% of #2 to yield the combined tempera-
ture, where x is the value entered in this field.
50 • MultiFlex CUB-II and CUB-TD I&O Guide
8.2.4.5.
Min OFF/ON Times
MinOnTime : 1
MinOffTime: 1
Max Pmpdwn: 60 S
RsolCmpDly: 60 S
Minimum ON Time
The Minimum ON Time is the amount of
time the compressor must remain ON after acti-
vation before being allowed to turn OFF. Enter
the desired minimum ON time in minutes.
Minimum OFF Time
The Minimum OFF Time is the amount of
time the compressor must remain OFF after
deactivation before being allowed to turn ON.
Enter the desired minimum OFF time in min-
utes.
Max Pump Down Time
A Pump Down is achieved by turning the
refrigeration solenoid OFF while the compressor
remains ON. The Max Pump Down Time is the
maximum amount of time a Pump Down will
last if it is not terminated prematurely by the
suction pressure falling below the Minimum
Suction Pressure setpoint.
Refrigeration Solenoid/Compressor ON Delay
This field appears only if using the Tempera-
ture compressor control strategy.
The Refrigeration Solenoid/Compressor ON
Delay affects how long the CUB will wait after
opening the refrigeration solenoid at the start of
refrigeration before activating the compressor.
Enter the desired delay in seconds.
Suction Setpoint
CutInPress : 55
CutOutPress: 45
MinimumPres: 1
NOTE: If you are using the Temperature
compressor control strategy, the suction set-
points shown in this screen will be used as
fallback suction setpoints, enabled only when the case
Temperature Control Input fails.
M
M
026-1705 Rev 7 06-APR-2010
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