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

Fan Sled Disassembly

In some cases, it may be necessary to remove the fan sled from the
unit and break it down into smaller components. See Tables 27-30
and Fig. 52 for maximum complete fan sled dimensions and hous-
ing only dimensions.
To remove the fan sled:
1. Remove all of the panels except the fan discharge panel 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 sec-
tion by removing the 4 screws from each frame to corner
piece connection.
4. If complete fan sled removal is required, unscrew bolts hold-
ing the isolator base to the bottom of the unit.
5. Disassemble fan and fan housing in place and/or affix
appropriate rigging to remove the required components, not-
ing in a diagram where each component is attached. Compo-
nents should be removed in the following order:
H
L
AIRFOIL/FORWARD CURVE
HORIZONTAL DISCHARGE SHOWN
H
L
AIRFOIL/FORWARD CURVE
UPBLAST DISCHARGE SHOWN
W
W
a39-4390
Fig. 52 — Fan Sled
106
a. Belts and sheaves
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

See Tables 27-30 and Fig. 52 for fan sled dimensions.
NOTE: To avoid unnecessary stresses on bearing and fan compo-
nents; 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
W
L
W
A39-4391