AAON RSMD-CM, Техническое руководство

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7
RSMD-CM Technical Guide
Table 1: RSMD-CM Module Electrical
and Environmental Requirements
INSTALLATION AND WIRING
Electrical and Environmental Requirements
General
Correct wiring of the AAON controller and its modules is the
most important factor in the overall success of the installation
process. The AAON controller and modules are factory
installed and wired at the AAON factory. Some of the following
information may not apply to your installation if it 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 .
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 unit controller, RSMD-CM,
and any associated module .
Please carefully read and apply the following information when
wiring the unit controller, RSMD-CM, 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 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.
7. When communication wiring is used to interconnect
HVAC 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 HVAC unit controller,
RSMD-CM 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 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
making all these checks, the POWER LED does not light up,
please contact AAON Controls Support for assistance.
Control
Device
Voltage
VA
Load
Operating Temperature
Humidity
(Non-
Condensing)
RSMD-CM
Module
18-30VAC 18
-22°F to 158°F
-30ºC to 70ºC
0-95% RH
Inputs
Resistive Inputs require 10KΩ
Type 3 Thermistor
24VAC Inputs provide 4.7kΩ
Load
Outputs
Relay Outputs: 1 amp
maximum per output.