6
RSM-DEV1 Technical Guide
INSTALLATION
Electrical and Environmental Requirements
General
Correct wiring of the AAON unit controller and its modules is
the most important factor in the overall success of the installation
process. The AAON unit controller and modules are installed and
wired at the AAON factory. Some of the following information
may not apply if the unit was pre-wired at the factory. However, if
troubleshooting of the controller or modules is required, it is a good
idea to be familiar with the system wiring.
Wiring
The modules must be connected to an 18-30 VAC power source
of the proper size for the calculated VA load requirements. All
transformer sizing should be based on the VA ratings listed in
Table
1, this page.
Control
Device
Voltage
VA
Load
Operating Temperature
Humidity
(Non-
Condensing)
RSM-DEV1
18-30 VAC
18
-22ºF to 158ºF
-30ºC to 70ºC
0-95% RH
Inputs
Resistive Inputs require 10KΩ
Type III Thermistor
24 VAC Inputs provide
4.7KΩ Load
Outputs
Relay Outputs: 1 amp
maximum per output.
Table 1: RSM-DEV1 Electrical and Environmental
Requirements
NOTE:
If the temperature at the controller is below -4ºF
(-20ºC), the display refresh rate could be less
responsive.
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
AAON unit controller, RSM-DEV1, and any
associated module.
Please carefully read and apply the following information when
wiring the unit controller, RSM-DEV1, and any associated module.
1. All wiring is to be in accordance with local and
national electrical codes and specifications.
2. All 24 VAC wiring must be connected so that all
ground wires remain common. Failure to follow this
procedure can result in damage to the controller and
connected devices.
3. Minimum wire size for 24 VAC wiring should be
18-gauge.
4. Minimum wire size for all sensors should be 24-gauge.
Some sensors require two-conductor wire and some
require three- or four-conductor wire.
5. Minimum wire size for 24 VAC thermostat wiring
should be 22-gauge.
6. Be sure 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.
7. When communication wiring is used to interconnect
AAON unit controllers together or to connect to other
communication devices, all wiring must be plenum-
rated, minimum 18-gauge, two-conductor, twisted pair
with shield. AAON can supply communication wire
that meets this specification and is color coded for
the network or local loop. Please consult your AAON
distributor for information. If desired, Belden #82760
or equivalent wire may also be used.
8. Before applying power to the AAON unit controller,
RSM-DEV1 Modules, and any associated modules, be
sure to recheck all wiring connections and terminations
thoroughly.
Powering Up
When the controller and modules are first powered up, the POWER
LED should light up and stay on continuously. If it does not light
up, check to be sure the 24 VAC is connected to the controller, that
the wiring connections are tight, and they are wired for the correct
polarity. The 24 VAC power must be connected so all ground wires
remain common. If after making all these checks, the POWER
LED does not light up, please contact AAON Controls Support for
assistance.
Support is available Monday through Friday
7:00 A.M. to 5:00 P.M., Central Time.
1-866-918-1100 | 1-918-382-6450
