Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 177)

Auto-Zone Plus Section 4
Start-Up and Troubleshooting 4-27
COOL2 - (Y2) The Zone Manager will make the connection to the “R” terminal
when activating the second stage of cooling.
HEAT1 - (W1) The Zone Manager will make the connection to the “R” terminal
when activating the first stage of heating.
HEAT2 - (W2) The Zone Manager will make the connection to the “R” terminal
when activating the second stage of heating.
2.2.4 Economizer/VFD Connector
This connector has two control signal outputs. The A1 terminal is used for control of an
Economizer Actuator. The A2 terminal is used for control of a Variable Frequency Drive
(VFD).
A1 - This analog output provides a 0-10 VDC, 2-10VDC, 10-0 VDC or 10-2
VDC configurable control signal, which modulates the Economizer Damper
motor position.
A2 - 0-10 VDC, 2-10VDC, 10-0 VDC or 10-2 VDC configurable control signal,
which modulates a Variable Frequency Drive (When VFD is used instead of
Bypass Actuator & Damper for Duct Static Pressure Control)
Warning: This output must not be shorted to 24 VAC. Some actuators have
this wiring set-up. When an actuator has this type of wiring, the
Economizer motor must be powered from a separate isolated 24 VAC
transformer to avoid damaging the Zone Manager. Belimo actuators
do not have this problem and may be wired without an isolation
transformer.
GND - Common return wire, this point is tied to GND on the Zone Manager.
2.2.5 Powered Exhaust
This connector provides a normally open set of isolated contacts, which CLOSE when the
Economizer is driven open past its minimum position setpoint. The wiring consists of two
wires, which are interchangeable.