Automated Logic RC642 Technical Instructions page 77

The cooling analog output opens to 50% when the freezestat is on.
Cooling is enabled when:
•
The unit is running, and
•
The fan status is on, and
•
The unit is not heating.
Heating
If staged heating is used, the Room Controller measures the zone temperature and turns
on the first and second stage heating (if available) as needed to maintain the heating
setpoint. A 5-minute delay between stages prevents short cycling, and each stage has a 1-
minute minimum on time and a 1-minute minute minimum off time.
If hot water heating is used, the Room Controller measures the zone temperature and
modulates the heating analog output to maintain the heating setpoint.
The heating analog output opens to 100% when the freezestat is on.
Heating is enabled when:
•
The unit is running, and
•
The fan status is on, and
•
The unit is not cooling.
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