Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 63)

Auto-Zone Plus
Section 2
Design Guide 2-31
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 CV Controller. If a single transformer is
used to power more than one CV Controller you must connect GND-
to-GND and 24VAC-to-24VAC on each CV controller. Failure to
observe polarity will result in damage to one or more components in
your system.
Warning: Use extreme care not to damage any of the electronic components
while mounting the backplate. Mark the holes then remove the CV
Controller from the backplate before drilling.
Do not allow metal shavings to fall onto the circuit boards.
The Constant Volume Controller requires the following electrical connections:
18 Gauge minimum unless otherwise noted.
-24VAC Supply Voltage........................................................................... 2 Conductors
-Communications Loop .................. (18 ga. min.) 2 conductor twisted pair with shield
WattMaster wire, Belden #82760 wire or equivalent
-Supply Air Temperature Sensor ........................................ (24 ga. min.) 2 Conductors
-Room Air Temperature Sensor........... (24 ga. min.) 2 Conductors for standard sensor
3 Conductors for sensors with setpoint adjustment
-Outdoor Air Temperature Sensor ...................................... (24 ga. min.) 2 Conductors
-HVAC Unit Control Wiring.....................................................................R - Common
G - Fan
Heat/Cool Stage 1
Heat/Cool Stage 2
Heat/Cool Stage 3
Heat/Cool Stage 4
Tip:
After making all electrical connections it is advised to unplug all terminal blocks
on the CV Controller until you are ready to begin the checkout procedure. This
may help to prevent damage if wiring errors occur elsewhere in the system
during installation or start-up.