– 17 –
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)