Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 46)

Section 2 Auto-Zone Basic
2-16 Installation and Wiring
The Zone Controller requires the following electrical connections:
24VAC Supply Voltage............................................................................ 2 Conductors
Communications Loop........................................ 2 Conductor twisted pair with shield
(Belden #82760 or equivalent)
Room Temperature Sensor ...................................... 2 Conductors for standard sensors
3 Conductors for sensors with setpoint adjustment
Fan Terminal units / Auxiliary Heat...............2-4 Conductors see wiring diagrams for
(Optional) Aux. Relay board
Tip: After making all electrical connections, it is suggested that all terminal blocks
on the Zone Controller be unplugged until you are ready to begin the checkout
procedure. This may help prevent damage if wiring errors occur elsewhere in the
system during installation or start-up. This is particularly important with the
Zone Controllers since an error on one unit may prevent any of the others from
working until the problem is found and corrected.
Warning:
Polarity is very important when connecting power to the controllers!
The grounded side of the control transformer must be connected to
the terminal labeled GND on the Zone Controller. If a single trans-
former is used to power more than one Zone Controller, you must
connect GND-to-GND and 24VAC-to-24VAC on each zone control-
ler. Failure to observe polarity will result in damage to one or more
components in your system.