44 BAS-SVX44C-EN
Temperature Cycle Control
Figure 21. Auto heat and cool systems
Figure 22. Auto 2/heat and 2/cool systems
General Notes:
• The number of cooling or heating cycles are fixed according to CPH setting value.
• The duty cycle is varied during the cycling control.
• There are five (5) options for cooling CPH selection and ten (10) options for heating CPH selection.
• The cycles per hour for first-stage compressor (Option Number 0160) is used for the first stage of heat
pump systems or the first cool stage of conventional systems.
General Notes:
• The second-stage output increases the speed of cooling and heating.
• The algorithm of cycling control is the same as the first-stage output. However, the second-stage output
has independent cycle period setting.
• All stages used the same temperature differential around setpoint for cycling control.
• When the system is set for 2H/1C HP, the cycles for auxiliary heat (Option Number 0164) is used for
the second auxiliary heat stage.
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