ZEC410 VAV Controllers Installation Instructions
7
Supply Power Terminal Block
The 24 VAC supply power terminal block is a gray, removable, 2-terminal plug that fits into a board-mounted jack on
the upper left of the ZEC controller.
Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the terminal plug.
To wire the ZEC410 controller:
1.
Terminate wiring according to Figure 8 if you are using staged outputs for the heating control. See Figure 9 if
you are using incremental outputs for the heating control.
2.
Wire the network temperature sensor and CO
2
sensor to the ZEC’s SA Bus.
3.
Wire the FC Bus in a daisy chain.
4.
Ensure that the ZEC’s device address DIP switches are set to the appropriate device address. (See
Setup and
Adjustments
.) Also, activate the end-of-line (EOL) switch if necessary.
IMPORTANT:
The 24 VAC power should not be shared with other network devices. Sharing power with other
network devices may cause noise, interference, and ground loop problems. You may damage the controller by
sharing power with other devices.
Figure 6: VAC Supply Power
Terminal Block Wiring
ZEC410
Supply Power
Terminal Block
Wires from
24 VAC, Class 2
Power Transformer
COM
24 VAC
