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14
Temperature Control and Energy
Management
number of seconds it takes your fan to get to full-speed (by obser-
vation) and divide that number into 30 to obtain the recommended
maximum number of starts per hour. Two-speed motors cycling be-
tween half and full speeds permit a commensurately greater number
of control cycles.
Variable frequency drives, of course, provide the ultimate in both tempera-
ture control and energy management and can be easily retrofitted to your
system. Please discuss this with your Marley representative.