Operational Information; Timers; Cycle Timer - Carrier Performance TP-PRH-A Installation Instructions Manual

OPERATIONAL INFORMATION

Timers

Five- - Minute Compressor Timeguard
This timer prevents compressor from starting unless it has been off for at least 5
minutes. It can be overridden for 1 cycle by simultaneously pressing FAN and UP
buttons.

Cycle Timer

Based on the selection of 2, 4, or 6 cycles per hour, this timer is set to 30, 15, or 10
minutes. This much time must elapse from the start of one cycle before another
cycle can start. It serves to impose the cycles per hour limits. It can be defeated for
one cycle by simultaneously pressing the FAN and UP buttons.
Ten- - Minute Staging Timer
In multistage heating or cooling, this timer prevents any higher stage from turning
on until preceding stage has been on for 10 minutes. When staging between
compressor and electric heat or between compressor and furnace heat, the time is
configurable. The timer is configurable via Option 17. This timer is overridden if
temperature error is greater than 5_ (usually due to a large change in desired
temperature) and equipment stages up in 60 second intervals.
The ten- - minute staging timer does not require the thermostat to change to a higher
stage after 10 minutes. If the system is able to meet the demand (maintain setpoint)
it may not change stages after the 10 minute timer has expired. If there is sufficient
demand for a higher stage at the end of 10 minutes or at any time after the 10
minute timer has expired, the thermostat will energize the next higher stage.
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