Mammoth 2 to 6 Tons: High Efficiency, Superior IAQ Single Circuit Vertical (B-Vintage) - Manual (Page 9)

9
MAMM-WSHP-IOM-1BA (February 2012)
Fan / Cone Alignment
1. Temporarily attach the cone to the cell inlet using
the screws and washers provided, or slightly
loosen the screws holding the cone if already in-
stalled. Use a minimum of four screws for this step.
2. Center the cone in the wheel shroud.
FANWALL TECHNOLOGY
®
Assembly
Figure 1—FANWALL ® cone alignment
TYPICAL FAN-CONE
CLEARANCE
FIGURE 1
a. Refer to the fan wheel overlap drawings pro-
vided to determine where to set the wheel with
respect to the cone.
b. Adjust the amount of overlap by moving the
motor pedestal forward or backward to line up
the cone with the wheel (wheel/cone overlap is
designed to insert the cone 50% of the dis-
tance of the rolled shroud lip on the wheel).
Once you have the wheel approximately lo-
cated, tighten the ½” pedestal bolts to 90ftlbs.
a. The cone alignment can be a tedious process
as there are no tools that effectively work to
align the cone. It is a hands on process to align
the cone. Mammoth cones have a running
clearance of about 1/16" (see Figure 1).
b. Loosen the four screws that were used to hold
the cone for the depth alignment. Hold the
cone with one hand and with the other use a
drill to attach a screw to hold it in place. Feel
between the wheel inlet shroud and the cone
and set the gap to approximately 1/16" and
tighten the screw in that location (top of the
cone is usually the best place to start). You
should be able to move the cone about that
screw location, adjusting the cone on the left or
right until there is approximately a 1/16" gap.
c. Spin the wheel by hand at this point to check
for any clearance issues. If the wheel spins
clear, tighten the remaining screws on the
cone. Check that the wheel spins clear after
tightening each screw.