Wiring Checks
One of the most important checks to make before powering up
the system for the fi rst time is to confi rm proper voltage and
transformer sizing. Each VAV/Zone Controller Package requires
6 VA of power delivered to it at 24 VAC. See
pages 20-21
of this
manual for complete wiring and transformer sizing information
for the VAV/Zone Controller.
Check all modular connectors to be sure they are completely
pushed and locked into their mating connectors. Confi rm that all
sensors required for your system are mounted in the appropriate
location and that the modular cables are plugged into the correct
connectors on the VAV/Zone Controller. Check the actuator cable
and be sure it is plugged in and secured to the modular connec-
tor on the actuator and the VAV/Zone Controller circuit board
modular connector. If using a Standard Room Sensor or terminal
connection for an E-BUS Digital Room Sensor, check to make
sure the wiring is correct. See
Figure 10, page 20
in this manual
for wiring details. If attaching an E-BUS Sensor with an E-BUS
cable, make sure the E-BUS connector is connected to one end
of the E-BUS sensor cable and the other end is connected to the
E-BUS sensor connector on the VAV/Zone Controller. Be sure
any VAV/Zone Controller Expansion Modules connected to the
VAV/Zone Controller are also correctly wired per the VAV/Zone
Controller Expansion Module wiring instructions on
pages 20
through 23
of this manual.
After all the above wiring checks are complete, apply power to
the transformer(s) that is connected to the VAV/Zone Controller.
Powering Up
When the Controller and Modules are fi rst powered up, the
POWER LED should light up and stay on continuously. If it does
not light up, check to be sure that you have 24 VAC connected to
the controller, that the wiring connections are tight, and that they
are wired for the correct polarity. The 24 VAC power must be
connected so that all ground wires remain common. If after mak-
ing all these checks, the POWER LED does not light up, please
contact WattMaster Controls Technical Support for assistance.
Power Wiring
One of the most important checks to make before powering up
the system for the fi rst time is to confi rm proper voltage and
transformer sizing for each controller. Each VAV/Zone Control-
ler requires 6 VA of power delivered to it at 24 VAC. You may
use separate transformers for each device (preferred) or power
several devices from a common transformer. If several devices
are to be powered from a single transformer, correct polarity
must be followed.
WARNING
:
Observe Polarity! All boards must be wired with
GND-to-GND and 24 VAC-to-24 VAC. Failure to
observe polarity will result in damage to one or
more of the boards.
Check all wiring leads at the terminal block for tightness. Be sure
that wire strands do not stick out and touch adjacent terminals.
Confi rm that all sensors required for your system are mounted
in the appropriate location and wired into the correct terminals
on the VAV/Zone Controller.
After all the above wiring checks are complete, apply power to
the VAV/Zone Controller.
Important Wiring Considerations
15
VAV/Zone Controller Package
INSTALLATION & WIRING
