AAON RQ SERIES, Manual

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4. Once the power source output
voltage has been identified and
checked to be accurate, ensure that
the power supply is off before
continuing with the steps below.
5. The power input wires (18 AWG
red/black wires) on the wiring
harness should be connected to the
power source as shown below in
Figure 19.
a. The USHX power input wires
are non-polar, so the wire
ordering and colors are not
significant for the purposes of
this step in the procedure. All
connectors used between the
USHX, power source, and
MSEV should be UL-
approved.
b. The wiring schemes of the
‘Single USHC - MSEV Setup’
and ‘Single USHS Setup’ are
the same except that the
PWM output wires of the
USHS for the ‘Single USHS
Setup’ process should be
disconnected, terminated
with wire nuts, and wrapped
with electrical tape so that
they do not form short
circuits with each other or
any other wires or metal
surfaces. As for the ‘Single
USHC- MSEV Setup’
process, the PWM output
wires should be connected to
the MSEV as shown below in
Figure 19.
Figure 19 - Single USHC-MSEV or single USHS wiring diagram