Carrier A07049 Installation Instructions Manual page 44

Three-Minute Minimum
on Time
In normal operation, when a stage turns on, it will not turn off for a minimum of
3 minutes. If the setpoint is changed, this timer is canceled, allowing the
equipment to turn off immediately when the demand is removed.
Heat/Cool Setpoints (Desired Temperature)
A minimum difference of 1 _ and maximum of 6 _ is enforced between heating
and cooling desired temperatures. This is done by allowing 1 setting to "push"
the other, to maintain this difference. This difference is adjustable via
Configuration Option 11.
Equipment
On Indicators
When cooling equipment is on, a COOL ON icon is displayed. While cooling
equipment operation is delayed by the timeguard or cycle timer, COOL ON will
flash. The same is true for HEAT ON.
When the W is energized in a heat pump, the auxiliary heat on icon will be
displayed.
Auto Changeover
When auto changeover mode is selected, a change from heat to cool (or vice
versa) will not occur until an opposite mode demand has existed for 20 minutes.
If setpoint is changed, 20-minute requirement is deleted.
Emergency Heat Mode
When AC/HP Control is configured as a heat pump and emergency heat is
selected, all Y signals are locked out, and W becomes energized upon a call for
heat.
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