AAON RL-240 - Manual (Page 44)

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the neoprene gasket. The front isolators
should be adjusted until this gap
measures approximately ¼” for units
with three or four blowers, or two
blowers in a vertical configuration
(shown in Figure 27). For units with a
single blower, or two blowers positioned
side by side, the gap should be
approximately 1/8”.
5. Check all isolators to ensure that the
spring, spring cap and spring base plate
are aligned. The position of the spring
cap should be adjusted such that the
spring is straight up and down.
Adjustments can be made by applying
horizontal pressure to the locking bolt.
6. Individually tighten all four locking
bolts while the adjustment bolts are held
in position.
Figure 26 - Rear Isolator Detail
Figure 27 - Fan Assembly Detail
Figure 28 - Blower Assembly
Back Draft Damper Setup
The counter balance is shipped loose and
may need to be installed during start-up on
some applications. Not all applications will
require the use of the counter balance on the
back draft dampers. If the unit is equipped
with back draft dampers on the supply fan,
the fans should be started without the
counter balance and the operation of the
back draft dampers should be observed. If the back draft dampers do not open
completely, then the counter balance can be
installed to assist with the opening of the
back draft dampers. The counter balance
should be installed in the horizontal position
when the back draft dampers are held closed
(see Figure 29).