Fan Sled Disassembly; Fan Sled Dimensions - Carrier Aero 39MN Series Installation, Start-Up And Service Instructions Manual

Fan Sled Disassembly —
necessary to remove the fan sled from the unit and break it
down into smaller components. See Tables 28-31 and Fig. 44
for maximum complete fan sled dimensions and housing only
dimensions.
To remove the fan sled:
1. Remove all of the panels except the fan discharge pan-
el from the fan section.
2. Disconnect the vibration absorbent discharge seal by
unscrewing the seal channels from the discharge of the
fan housing. Remove the fan discharge panel.
3. On larger units, the fan sled may be extremely heavy.
Remove the top and vertical frame members of the fan
section by removing the 4 screws from each frame to
corner piece connection.
4. If complete fan sled removal is required, unscrew bolts
holding the isolator base to the bottom of the unit.
5. Disassemble fan and fan housing in place and/or af-
fix appropriate rigging to remove the required com-
ponents, noting in a diagram where each component is
attached. Components should be removed in the fol-
lowing order:
a. Belts and sheaves
H
L
AIRFOIL/FORWARD CURVE
HORIZONTAL DISCHARGE SHOWN
H
L
AIRFOIL/FORWARD CURVE
UPBLAST DISCHARGE SHOWN
In some cases, it may be
W
W
a39-4390
Fig. 44 — Fan Sled
b. Motor
c. Fan shaft
d. Fan wheel
1) Double-width, double inlet forward curved fan
wheels are removed through the fan discharge
opening.
2) Double-width, double inlet airfoil wheels are
removed through the side of the housing after
removal of the drive side inlet volute.
3) Single-width, single inlet plenum fan airfoil
wheels are removed from the fan cabinet
through a side, end, or top not obstructed by a
discharge opening.
e. Fan housing
NOTE: Install the preceding components in the reverse
order.
Fan Sled Dimensions —
44 for fan sled dimensions.
NOTE: To avoid unnecessary stresses on bearing and fan com-
ponents; the fan, fan sled or fan section should not be tilted on
its side. These stresses may lead to eventual component failure.
H
BELT DRIVE PLENUM FAN
H
L
DIRECT DRIVE PLENUM FAN
103
See Tables 28-31 and Fig.
W
L
W
A39-4391