Lennox ZCC Series Unit Information page 44

ECONOMIZER STANDARD EFFICIENCY
POWER:
1- Terminal strip TB1 energizes the economizer components with 24VAC.
OPERATION:
2- Enthalpy sensor A7 and A62 (if differential enthalpy is used) communicates to the economizer control
module A6 when to power the damper motor B7.
3- Economizer control module A6 supplies B7 with 0 - 10 VDC to control the positioning of economizer.
4- The damper actuator provides 2 to 10 VDC position feedback.
SEQUENCE OF OPERATION
Page 44