Orion System SA E-BUS Controller - Manual (Page 10)

Zone
Zone
Installation & Wiring
SA E-BUS 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 E-BUS Controller and
associated modules.
Please carefully read and apply the following information when wiring
the SA E-BUS Controller or its associated modules. See Figure 5 on
page 11 for the SA E-BUS Controller wiring diagram. See Figures 16
and 17 on pages 20 and 21 for SA Expansion Module wiring. And see
Figure 25 on page 31 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 E-BUS 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 E-BUS Controller, be sure
to recheck all wiring connections and terminations
thoroughly.
Important Wiring Considerations
General
Correct wiring of the SA E-BUS Controller is the most important
factor in the overall success of the controller installation process. In
general, most SA E-BUS 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 E-BUS Controller and associated modules.
The SA E-BUS 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 E-BUS 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 E-BUS 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.
Contr
ol
De
vice
V
olta
ge
V
A
Load
Temper
atur
e
Humidity
(Non-
Condensing)
OE332-23E-SA E-BUS
Controller
SA E-BUS 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
Module
24VAC 8
-30°F to
150°F
90% RH
Table 1: Voltage and Environment Requirements