Adjusting Air Seals; Segment Installation And Replacement - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

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Fig. 113 — Remove Wheel for Cleaning
(Sizes 03-06 Only)
NOTE: If racking is greater than
rected to ensure that the drive belt will not disengage
from the wheel.
9. Wheel sections installed at angles greater than 30 de-
grees from vertical will require seal adjustment
(Fig. 116). Adjust the diameter seals to avoid excessive
wheel drag. A final check of seal adjustment is recom-
mended for all designs.
ADJUSTING AIR SEALS — Four adjustable diameter seals
are provided on each cassette to minimize air transfer be-
tween the counterflowing airstreams.
To adjust diameter seals:
1. Loosen the diameter seal adjusting screws and back
seals away from wheel surface (Fig. 116).
2. Rotate the wheel clockwise until two opposing spokes
are hidden behind the bearing support beam.
3. Using a folded piece of paper as a feeler gauge, position
the paper between the wheel surface and the diameter
seals.
4. Adjust the seals towards the wheel surface until a slight
friction on the feeler gauge (paper) is detected when the
gauge is moved along the length of the spoke.
5. Retighten the adjusting screws and recheck clearance
with the feeler gauge.
SEGMENT INSTALLATION AND REPLACEMENT —
Wheel segments are secured to the wheel frame by a segment
retainer, which pivots on the wheel rim and is held in place
by a segment retaining catch (Fig. 117).
To install wheel segments follow the steps below and refer
to Fig. 117.
1. Unlock two segment retainers, one on each side of the
selected segment opening.
2. With the embedded stiffener facing the motor side, in-
sert the nose of the segment between the hub plates.
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1 / in., it must be cor-
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3. Holding segment by the two outer corners, press the
segment towards the center of the wheel and inwards
against the spoke flanges. If hand pressure does not fully
seat the segment, insert the flat tip of a screw driver
between the wheel rim and the outer corners of the seg-
ment and apply downward force while guiding the seg-
ment into place.
4. Close and latch each segment retainer under the seg-
ment retaining catch.
5. Slowly rotate the wheel 180 degrees. Install the second
segment opposite the first for counterbalance. Rotate the
two installed segments 90 degrees to balance the wheel
while the third segment is installed. Rotate the wheel
180 degrees again to install the fourth segment opposite
the third. Repeat this sequence with the remaining four
segments.
HORIZONTAL
BEARING BEAM (2)
Fig. 114 — Lifting Hole Locations
Fig. 115 — Avoid Racking of Frame
VERTICAL
BEARING BEAM (2)
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