42 BAS-SVX44A-EN
Temperature Cycle Control
The heat and cool cycling rate, expressed in cycles per hour (CPH), indicates how often heating or
cooling system is turned on when temperature is within the temperature differential from the
setpoint (which is 1°F [0.5°C]). There are ten options (1–10) for heat stages and five options (1–5)
for cool stages. The number selected is the maximum number of times the stage is cycled in 1 hour.
For example, when the system is set to 5 CPH, it runs at 12-minute cycles with variable duty cycle.
Depending on the heating or cooling load, which is measured by feedback from the sensor
thermistor and/or temperature error, the system could run at 50% duty cycle (6 minutes ON and
6 minutes OFF), 80% duty cycle (9.6 minutes ON and 2.4 minutes OFF), or other variations of the
duty cycle.
Note: The
cycling rate described above is active only when the temperature is within the
temperature differential. If the temperature is outside of the temperature, the heating and
cooling equipment will either be fully ON or fully OFF accordingly.
The following figures show cycling control and includes general notes, if applicable, about each
type
of cool or heat system.
Important: There is a built-in compressor protection delay. The delay guarantees a minimum of
5 minutes between compressor cycling ON/OFF. This built-in delay is added to a
configurable
additional delay of 0 to 5 minutes as setup in Option Number 0182. The
minimum delay will be between 5 and 10 minutes.
Figure 20. Heat only or cool only systems
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