Damper Section Removal And Reinstallation - Carrier 40UV050 Installation, Start-Up And Service Instructions Manual

Damper Section Removal and Reinstallation

(Fig. 18)
Lock out and tag all power supplies to equipment and con-
trols prior to servicing unit. Follow all safety codes. Failure
to do so could result in personal injury.
The assembly order of the bearing installation is critical. Be
careful with all components during removal and installa-
tion. Any excessive force applied to these components can
cause unintended damage and void unit warranty.
To remove damper section:
1. Turn off all power to unit.
IMPORTANT: Tag each right front panel (40UV) or
middle bottom panel (40UH) for each unit. Panels have
electrical information specific to each unit.
2. Use 5 / in. hex (Allen) tool or
32
front (40UV) or bottom (40UH) panels and right end
panels.
3. Remove four carriage bolts and nuts securing kickplate to
end frames.
IMPORTANT: Tag kickplate for each unit. Kickplate
has electrical information specific to each unit.
3 / in. nut driver to remove
8
4. Remove the two 1
the damper sides (one on each side) and remove
kickplate.
5. Remove 1 / in. head screws attaching outside air (OA)
4
actuator to damper shaft or attaching locking quadrant as-
sembly to damper shaft. Remove OA actuator or locking
quadrant assembly.
1
6. Remove six / in. head screws (3 per side) securing
4
damper to 40UH unit rear panel.
7. Remove two 5 /
16
back frame.
8. Remove damper assembly from unit.
To replace damper section:
1. Replace damper assembly into unit.
5
2. Replace / in. nuts attaching damper assembly to back
16
frame.
1
3. Replace six / in. head screws (3 per side) securing
4
damper to 40UH unit rear panel.
1
4. Replace / in. head screws attaching OA actuator to
4
damper shaft OR attaching locking quadrant assembly to
damper shaft. Replace OA actuator or locking quadrant
assembly.
5. Replace the two
to the damper sides (one on each side) and remove
kickplate.
6. Replace four carriage bolts and nuts securing kickplate to
end frames.
7. Reinstall front (40UV) or bottom (40UH) panels. Rein-
stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match-
es unit tag.
8. Restore power to the unit.
40
/ in. head screws securing kickplate to
4
in. nuts attaching damper assembly to
1 / in. head screws securing kickplate
4