Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the
spade terminals as shown in Figure 6. See Table 5 for more information.
Figure 6: 24 VAC supply power spade terminal wiring
The supply power wire colors may be different on transformers from other manufacturers. Refer to
the transformer manufacturer’s instructions and the project installation drawings for wiring details.
Important:
Connect 24 VAC supply power to the PCV and all other network devices so that
transformer phasing is uniform across the network devices. Powering network devices
with uniform 24 VAC supply power phasing reduces noise, interference, and ground loop
problems. The PCV does not require an earth ground connection. However, when grounding
the secondary of the 24 VAC transformer is required, only one connection to ground should be
made near the transformer. See the following figure.
Figure 7: Transformer grounding
CAUTION
Risk of Property Damage:
Do not apply power to the system before checking all wiring connections. Improper wiring of this
terminal may cause a short circuit across the 24 VAC power supply on -1 PCV models. A short circuit
may result in a tripped circuit breaker or blown fuse. If using a transformer with a built-in fuse, the
transformer may need to be replaced.
9
PCV1617 and PCV1632 VAV Box Controllers Installation instructions