Mammoth V-Cube - Manual (Page 23)

ward or backward. Fan wheel should not be rubbing
on the inlet cone. If cone alignment is required see
instructions for Fan Wheel/Cone Alignment below.
Once alignment and overlap are correct tighten the
(four) ½” pedestal mounting bolts to 90 ft-lbs.
11. Reconnect the four-wire electrical 11. cable from
the motor junction box. Before operation, start the
motor slowly to ensure the fan rotation is correct.
If the fan wheel is not rotating correctly, check the
motor leads for proper installation.
a. Drive side – Clockwise rotation when looking at
motor end.
b. Inlet side – Counter clockwise rotation looking at
fan inlet.
Fan Wheel/Cone Alignment
1. To align fan wheel/cone, first disconnect power to
the fan array control panel. Follow all lockout and
tag out procedures.
2. If the optional backdraft damper is furnished on the
inlet side of the fan it must be removed first. Remove
all tek screws on all sides attaching the damper
frame to the inlet side panel and remove it from the
cube. The purpose of the damper is so that main-
tenance staff can block the intake of a single fan to
prevent back flow until service on an inoperative as-
sembly can be performed. Note the directions of the
damper blades are running vertical. The damper is
installed directly onto the FANWALL® cube inlet side
panel and over the optional airflow straightener (if
supplied).
3. If the optional airflow straighteners are furnished on
the inlet side of the fan it must be removed next. Re-
move all tek screws on the airflow straightener panel
frame and remove it from the cube.
!
WARNING
Many of the following steps need to be performed with
the unit powered off and locked out. Disconnect the
main power switch to the unit before performing service
and maintenance procedures.
Figure 21: Check fan wheel/cone alignment and overlap.
Figure 22: Fan wheel/cone alignment – Step 2a
Figure 23: Fan wheel/cone alignment – Step 2b
Figure 24: Fan wheel/cone alignment – Step 3
IMPORTANT
Before restarting, re-balance the fan wheel once the
motor rotation and alignment have been corrected be-
fore placing the unit in operation.
VCES-V-CUBE-IOM-1A 23