NexSys
VAV-01 Controller
Installation Guide
11
WIRING CONNECTIONS
POWER SUPPLY
Use a UL
®
listed Class 2 power transformer supplying a nominal 24
VAC (+/- 10%). The supply to the transformer must be provided with
a breaker or disconnect.
NOTE:
The UL
®
listed Class 2 power transformer may be used to
power multiple UL
®
listed Class 2 powered devices provided
that the transformer is properly sized to power all equipment
simultaneously.
CAUTION
• WHEN POWERING MULTIPLE UL
LISTED CLASS 2 DEVICES FROM
THE SAME CLASS 2 POWER TRANSFORMER, POLARITY MUST BE
OBSERVED (24VAC HOT CONNECTED TO 24VAC HOT AND 24VAC
GND CONNECTED TO 24VAC GND).
• DO NOT GROUND THE SECONDARY OF THE POWER TRANS-
FORMER. THE TRANSFORMER FRAME MUST BE GROUNDED.
Specifications may change without notice as design improvements are
implemented.
POWER CONNECTIONS
The power connections to the VAV-01 are shown in Figure 4 below:
