Orion System SA Controller - Manual (Page 34)

Zone
Zone
Start-Up & Commissioning
SA Controller Technical Guide 34
Addressing & Powering Up
Before Applying Power
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the fi rst time, it is very
important to correctly address the controller and run through a few
simple checks.
Controller Addressing
All SA Controllers are equipped with address switches. If the SA Con-
troller is to operate as a stand-alone system (not connected to any other
HVAC unit or VAV/Zone Controllers), the controller address switch
should be set for address 1. When using the Modular Service Tool or
System Manager to program and confi gure the SA Controller, you would
enter this address to communicate with the controller. When the system
is to be connected to other HVAC unit controllers on a communica-
tion loop, each controller’s address switch must be set with a unique
address between 1 and 59. When the SA Controller will be used with
VAV/Zone Controllers, the SA Controller’s address switch must be set
as address 59, no exceptions. See Figure 29 below for address switch
setting information.
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 SA Controller requires 8 VA of power delivered
to it at 24 VAC and each of the modules require different VA loads (see
Table 1 on page 10 for details). You may use separate transformers for
each device (preferred) or power several devices from a common trans-
former. If several devices are to be powered from a single transformer,
correct polarity must be followed.
Figure 29: SA Controller Address Switch Setting