(Mar, 2012)
Compact CWE Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
2-6
2.6.2.1 Lowering the EC fans
After the A/C unit is installed, the EC fans may easily
be lowered to their operating positions below the
cabinet. With the A/C cabinet doors opened, unbolt
the two shipping support brackets from the sides of
each fan assembly where it attaches to the cabinet
frame (see Figure 13). Retain the brackets; they will
be needed to re-secure the fans if the A/C unit is ever
moved. They can also be convenient for holding the
fans in the “up” position if performing maintenance or
service to the unit.
Figure 13- EC Fan Assembly
SHIPPING SUPPORT
BRACKETS
TOP PLATE
After the shipping support brackets are removed,
push each fan assembly down by applying pressure
evenly on both sides of the fan at the center of the
top plate. Each fan assembly is supported with two
gas shocks which assist in lowering and raising the
fans. Hold the fan assembly down so the top plate is
on the fl oor of the cabinet as shown in Figure 12.
Align the two holes in each corner of the top plates
with the threaded inserts in the cabinet fl oor.
Top Plate
MOUNTING
HOLES 8x
Securely fasten the top plate for each fan assembly
to the cabinet fl oor using the eight ¼-20 hex bolts
provided. Tighten the bolts securely to prevent them
from vibrating loose. After the fi rst day of operation,
re-check the bolts for tightness.
2.6.3 Plenum Box
If an optional plenum box (plenum extension box or
2 - 3 way air distribution plenum box) is selected it is
typically shipped loose. To install a plenum box, fi rst
apply a strip of sealing foam around the top fl ange of
the A/C unit or, run a bead of silicone sealant. Place
the plenum assembly on top of the unit (see Figure
14). Attach the plenum with the self-tapping screws
provided. Holes are pre-drilled in the unit and the
plenum box. If mounting a 2 - 3 way air distribution
plenum box (shown in Figure 8), the front grille may
be removed for access to the mounting holes.
Figure 14- Plenum Installation
PLENUM
EXTENSION
