Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 113)

Auto-Zone Basic Section 4
Start-Up & Troubleshooting 4-11
Zone Controller Wiring
Correct wiring of the Zone Controller is critical to proper system operation. If compo-
nents are wired to the wrong inputs, the system will not operate correctly or will not op-
erate at all. Correct wiring of the 24VAC power is extremely critical. If voltage greater
than 24VAC is applied to the terminal, it will damage the board beyond repair. It is rec-
ommended that a separate transformer be used for each Zone Controller. If one trans-
former is used to power multiple Zone Controllers, all 24VAC wiring must be connected
so that all ground wires remain common. DO NOT REVERSE POLARITY
BETWEEN CONTROLLERS. Failure to comply with this will also result in damage to
the board. See Figure 4-9. Also see Section 2 of this manual for more detailed wiring
instructions and procedures.
Figure 4-9: Zone Controller Wiring