Unit Start-Up; Power Up; Power Up To Starting - Trane R Series Installation Operation & Maintenance

Unit Start-up

Power Up

The Power up chart shows the respective DynaView screens during a power
up of the main processor. This process takes from 30 to 50 seconds depend-
ing on the number of installed Options. On all power ups, the software
model will always transition through the 'Stopped' Software state indepen-
dent of the last mode. If the last mode before power down was 'Auto', the
transition from 'Stopped' to 'Starting' occurs, but it is not apparent to the
user.
Figure 39 Power Up

Power Up to Starting

The Power up to starting diagram shows the timing from a power up event to
energizing the compressor. The shortest allowable time would be under the
following conditions:
1. No motor restart inhibit
2. Evaporator and Condenser Water flowing
3. Power up Start Delay setpoint set to 0 minutes
4. Adjustable Stop to Start Timer set to 5 seconds
5. Need to cool
The above conditions would allow for a minimum power up to starting com-
pressor time of 95 seconds.
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