Honeywell EXCEL 5000 User Manual page 55

EXCEL CARE CONTROL ICONS ALPHABETIC REFERENCE
The following diagram illustrates off-time calculation for cooling systems:
Heating/Cooling System Off Time Calculation
In combined heating/cooling systems, if room temperature is outside the comfort
range, DUC does not switch off the system.
If room temperature is within the comfort range, DUC calculates two off times. One
calculation is the same as for heating-only systems. The other calculation is the
same as for cooling-only systems. DUC selected the lower of the two off times for
actual off time duration. For example, the off time for the heating system example is
14.5 minutes and the off time for the cooling system example if 10 minutes 45
seconds. So, DUC switches the heating/cooling system off 10 minutes, 45 seconds
before the end of the cycle.
57 74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)