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The start-up condition for the different modes is shown in the following two diagrams. This function
allows for the random restart of Zonelines in a building in the event of a power outage. The restart
delay will reduce the initial inrush current from the building to help prevent a second power outage of
indenite length. The controls will revert to settings established prior to the outage.
The Random Restart function is effective in the Class 2 mode.
Random Restart for AZ4500 Series
Random Restart
Cool Mode
Heat Mode
Stop Mode
Compressor
Run
Power
Down
Power
Down
3 mins.
Power
Recovered
Range
Stop
Fan
Operation
Electric Heat
Operation
Power Recovered
Compressor
Run
Fan
Operation
Electric Heat
Operation
Range
Power
Recovered
Stop
StopStop
(Continued next page)