4–7 62-11637
Figure 4.2 Start-Stop Default Operating Sequence
4.6.4 Start-Stop Operating Sequence
The operating sequence for Start-Stop Operation
under the default Configuration and Functional Param-
eter settings is provided in Figure 4.3.
4.7 CONTINUOUS OPERATION
In Continuous Operation, the unit will not shutdown
except in response to a shutdown alarm. Temperature
control in the compartment will operate under Pull-
down, Pull-Up, Cooling, Heating and Ultra Fresh.
Continuous Operation is normally used for fresh pro-
duce and other sensitive product loads. The Start-Stop/
Continuous key is pressed to switch between Continu-
ous Operation and Start-Stop Operation. The mode of
operation will be indicated in the status bar.
NOTE
The control system may be locked so that
the unit will always operate in Start-Stop or
in Continuous whenever the setpoint is
within a specific range. Refer to Range Lock
(Section 4.10.2) for additional information.
In Continuous Operation Pulldown or Pull-up will con-
tinue until the control system has calculated it is to end.
The calculation determines the average temperature
using the formula:
(SAT -RAT) / 2 = Calculated Average Temperature
When the Control Temperature is within the calculated
average temperature of set point, Pulldown or Pull-up
ends. Once Pulldown or Pull-up ends the system will
operate in accordance with Table 4–2 & Figure 4.3.
The operating sequence for Continuous Operation
under the default Configuration and Functional Param-
eter settings is provided in Figure 4.3.
Start-Stop
Off Cycle
CSMV CONTROLCSMV - 100%
+0.5 F (+0.3 C )
Setpoint
-3.6 F (-2.0 C )
Pull Down
Setpoint
Pull-Up
FALLING
REFRIGERATED
COMPARTMENT
TEMPERATURE
SWITCH POINT
RISING
REFRIGERATED
COMPARTMENT
TEMPERATURE
SWITCH POINT
Switch Point = Controlling Temperature - Setpoint
+ results are above setpoint, - results are below setpoint
*Switch points are the same for Perishable Range and Frozen Range
except in Frozen Range heating is not allowed.
+3.6 F (+2.0 C )
-0.5 F (+0.3 C )
CSMV - 0%
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