Trane QFNA-IOM-1 - Manual (Page 19)

Inlet Vanes
Caution:
Due to the size of the equipment,
reasonable care must be taken
when loading, unloading,
handling and installing the inlet
vane assembly to avoid over
stressing and possible permanent
damage to the frame and related
components by excessive racing,
skewing, twisting etc.
1. Bracket angles, isolators, and
fasteners are common
procurement items to be
supplied by the customer. See
Figure 11a.
2. Using an inlet vane angle ring
as a template drill eight (8)
holes of C (two (2) per
quadrant in Q Fan frame.
Assemble with size D bolts,
nuts and lockwashers.
3. Position support bracket under
inlet vane assembly as shown.
Use bracket to drill six (6)
holes in angle ring on flow
entering side. Use same drill
and fastener size as above.
4. Weld or fasten corners of the
bracket together and attach
isolator(s).
5. Use two isolators for size 49
through 60 only. Size 16
through 44 uses one isolator
mounted in the center.
Silencer—
Q Fan and Super Q II Fan
Plus Duct Silencers, when
ordered, are shipped loose from
the manufacturer and are field
installed.
They must be connected to the Q
fan using the flexible duct
connector but they can be either
rigid or flex connected to the
Super Q fans. Silencers are sized
for Q Fan and Super Q Fan
collars. The support structure for
silencers and flex connectors are
provided by the installer.
Inlet silencer— has a fixed center
body and should be attached as
per above description. The air flow
arrow on the silencer should follow
the direction of the air flow
indicated on the Q Fan.
Outlet silencer— has a movable
cylinder. The inner cylinder has
either sheet metal screws or is
spot welded. Remove the sheet
metal screws from the silencer
center body or break the spot
welds with a chisel and hammer.
The center body must then be
repositioned close to the end cap
of the fan (no more than one inch
from the end cap). Secure the
silencer center body with sheet
metal screws and connect with the
fan using connectors as per above
description.
The air flow arrow on the silencer
should follow the direction of the
air flow indicated on the Q Fan.
QFNA-IOM-1 19
Accessories Installation
Figure 11b—Typical Silencer