Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 16)

Section 1 Auto-Zone Plus
1-12 Design Guide
Warning: If the fan system has the capability of producing static pressures which
could damage ductwork you must provide a manual reset, high
pressure limit switch to cut-off the fan system in the event of high
duct static. Do not use your Auto-Zone Plus system as
a safety device!
• Use an Economizer. Although this is not a cure-all, it greatly improves operation
during cool weather when cooling loads are minimal. Using an Economizer also
improves ventilation and lowers operating costs.