Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 176)

Section 4 Auto-Zone Plus
4-26 Start-Up and Troubleshooting
2.2.1 24 VAC Power Connector
This connector provides power to the Zone Manager.
24 VAC - The “HOT” side of the control transformer.
GND - The grounded side of the control transformer. If the secondary of the
control transformer is not grounded, you must still observe polarity if the
transformer powers any other device!
Warning: Connect only the GND terminal to the grounded side of a transformer,
Failure to properly observe polarity will result in damage to the
system. Observe polarity at all points in the system.
2.2.2 Bypass Damper Connector
This connector carries the control signals for the Bypass Damper. The Bypass Damper
wiring consists of four wires.
FDBK - The bypass damper actuator has an integral 0-10,000 Ohm feedback
potentiometer which is used by the Zone Manager to determine the exact position
of the damper.
GND - Common return wire.
OPEN - The Zone Manager will apply 24 VAC to this connection when
attempting to drive the bypass damper OPEN.
CLOSED - The Zone Manager will apply 24 VAC to this connection when
attempting to drive the bypass damper CLOSED.
2.2.3 HVAC Unit Connector
This connector carries the control signals for the HVAC system. The HVAC wiring
consists of six wires.
R - Common return wire (normally the HVAC system will place 24 VAC on this
wire)
FAN - (G) The Zone Manager will make the connection to the “R” terminal when
the fan is energized.
COOL1 - (Y1) The Zone Manager will make the connection to the “R” terminal
when activating the first stage of cooling.