Orion System SA Controller - Manual (Page 10)

Zone
Zone
Installation & Wiring
SA Controller Technical Guide 10
Warning: When using a single transformer to power more
than one controller or expansion module, the correct polarity must
always be maintained between the boards. Failure to observe correct
polarity will result in damage to the SA Controller and associated
modules.
Please carefully read and apply the following information when wiring
the SA Controller or its associated modules. See Figure 5 on page 12
for the SA Controller wiring diagram. See Figures 16 and 17 on pages
20 and 21 for SA Expansion Module wiring. And see Figure 24 on page
28 for 12-Relay Expansion Module wiring.
1. All wiring is to be in accordance with local and national
electrical codes and specifi cations.
2. Minimum wire size for 24 VAC wiring should be 18-gauge.
3. Minimum wire size for all sensors should be 24-gauge.
Some sensors require 2-conductor wire and some require
3-or 4-conductor wire.
4. Be sure that all wiring connections are properly inserted
and tightened into the terminal blocks. Do not allow wire
strands to stick out and touch adjoining terminals which
could potentially cause a short circuit.
5. When communication wiring is to be used to interconnect
SA Controllers together or to connect to other
communication devices, all wiring must be plenum-rated,
minimum 18-gauge, 2-conductor, twisted pair with shield.
WattMaster can supply communication wire that meets this
specifi cation and is color coded for the network or local
loop. Please consult your WattMaster distributor for
information. If desired, Belden #82760 or equivalent wire
may also be used.
6. Before applying power to the SA Controller, be sure
to recheck all wiring connections and terminations
thoroughly.
Important Wiring Considerations
General
Correct wiring of the SA Controller is the most important factor in the
overall success of the controller installation process. In general, most SA
Controllers are factory installed and wired at the AAON
®
factory.
Controller Mounting
When the controller is to be fi eld mounted, it is important to mount the
controller in a location that is free from extreme high or low temperatures,
moisture, dust, and dirt. See Table 1 for a list of the required operating
conditions for the SA Controller and associated modules.
The SA Controller is housed in a plastic enclosure. It is designed to be
mounted by using the 3 mounting holes in the enclosure base. The SA
Controller needs to be installed in an environment which can maintain
a temperature range between -30°F and 150°F not to exceed 90% RH
levels (non-condensing). It is important to mount the controller in a
location that is free from extreme high or low temperatures, moisture,
dust, and dirt. Be careful not to damage the electronic components when
mounting the controller.
Considerations
The SA Controller and associated modules must be connected to a
24 VAC power source of the proper size for the calculated VA load
requirements. All transformer sizing should be based on the VA rating
listed in Table 1.
Control Device V
oltage
V
A
Load
T
emperature
Humidity
(Non-
Condensing)
OE332-23-SA Controller
SA Controller
24VAC 8
-30°F to
150°F
90% RH
OE333-23-SA
SA Expansion Module
24VAC 10
-30°F to
150°F
90% RH
OE358-23-12R
12-Relay Expansion
Module
24VAC 15
-30°F to
150°F
90% RH
OE370-23-HP2C
Two Condenser Head
Pressure Module
24VAC 5
-30°F to
150°F
90% RH
OE334-23-WPM-A
Water Source Heat Pump
Protection Module
24VAC 8
-30°F to
150°F
90% RH
OE365-23-EBD
E-BUS Distribution
Module
24VAC 50
-30°F to
150°F
90% RH
Table 1: Voltage and Environment Requirements