Section 3 – SR-2 Software Description
Defrost Setup Menu
The Defrost Setup Menu allows the defrost cycle to
be configured for maximum performance.
Defrost Interval In Range with Fresh Setpoint
Micro Rev
All
HMI Rev
All
Choices
2, 4, 6, 8 or 12 Hours
Factory Set
6 Hours
Exceptions
Description This feature selects the timed
interval between defrost cycles with Fresh range
setpoints when the temperature is in range.
Defrost Interval Not In Range with Fresh Setpoint
Micro Rev
All
HMI Rev
All
Choices
2, 4, 6, 8 or 12 Hours
Factory Set
4 Hours
Exceptions
Description This feature selects the timed
interval between defrost cycles with Fresh range
setpoints when the temperature is not in range.
Defrost Interval In Range with Frozen Setpoint
Micro Rev
All
HMI Rev
All
Choices
2, 4, 6, 8 or 12 Hours
Factory Set
6 Hours
Exceptions
Description This feature selects the timed
interval between defrost cycles with Frozen range
setpoints when the temperature is in range.
Defrost Interval Not In Range with Frozen
Setpoint
Micro Rev
All
HMI Rev
All
Choices
2, 4, 6, 8 or 12 Hours
Factory Set
6 Hours
Exceptions
Description This feature selects the timed
interval between defrost cycles with Frozen range
setpoints when the temperature is not in range.
Maximum Defrost Duration
Micro Rev
All
HMI Rev
All
Choices
30 or 45 Minutes
Factory Set
45 Minutes
Exceptions
Description This feature selects the maximum
time the unit can remain in a defrost cycle. A defrost
cycle normally terminates when the evaporator coil
temperature reaches 58°F (14°C). If rail alternate is
enabled a defrost cycle terminates at 65°F (18°C). If
the evaporator temperature does not reach this
temperature, the defrost cycle will terminate after the
elapsed time selected here.
3-21
31 January 2005