COOK UCIC - Manual (Page 2)

2
Ceiling Mounted Spring and Rubber-in-Shear (RIS) Iso-
lators
a. Elevate fan to operating height and brace.
b. Attach threaded rod to overhead support structure
directly above each mounting hole. Rod should extend
to within a few feet of fan.
c. Attach isolator to end of threaded rod using a nut on
each side of isolator bracket.
d. Insert another section of threaded rod through the fan
mounting hole and isolator.
e. Attach two nuts to threaded rod in isolator.
f. Place adjusting nut and locking nut on threaded rod
near fan mounting bracket.
g. Alternately rotate adjusting nut at each mounting loca-
tion until the fan weight is uniformly transferred to the
isolators. Remove bracing.
Duct Installation
Efficient fan performance relies on the proper installation
of inlet and discharge ducts. Be sure your fan conforms to
the guidelines below.
Non-Ducted Inlet Clearance
If your fan has an open inlet (no duct work), the fan must
be placed 1 fan wheel diameter away from walls and bulk-
heads.
Free Discharge
Avoid a free discharge into the plenum. This will result in
lost efficiency because it doesn’t allow for a static regain.
Rubber-In-Shear Ceiling Isolators Ceiling Mounted Spring Isolator
Figure 2 - Ceiling Mount Isolators
MIN
1 DIA
Non-ducted Inlet Clearance
Correct
Incorrect
Free Discharge
• The weight of the foundation should be 2 to 3 times the
weight of the unit and its motor.
Arrangement 9 (CM) is a ceiling-mounted fan. Suspend
the fan by steel rods strong enough to support the weight
the fan.
UCIC Installation
The fan support (roof curb) should provide a level surface
for installation. If the roof is pitched more than 1/2:12, a
sloped curb must be used to correct for the incline. If the
unit is installed on a non-level surface, the damper door
pivot should be positioned perpendicular to the peak of the
roof.
• Drill a hole in the curb shelf for conduit needed for
motor wiring.
• Install the UCIC fan over the curb with the conduit loca-
tion in line with the conduit hole in the curb.
• Firmly secure the unit to the curb.
NOTICE! Although a certain amount of vibration is
inherent in operating centrifugal fans, extreme vibra-
tion is a serious problem that may cause structural and
mechanical failure.
Isolation
Floor Mounted Spring Isolators
a. Mount fan and motor on isolation base (if supplied).
b. Elevate fan (or isolation base) to operating height and
insert blocks to hold in position.
c. Position isolators under the fan and vertically align by
inserting leveling bolt through mounting holes in the
fan or the base. The isolator must be installed on a
level surface.
d. Adjust the isolators by turning the leveling nut counter
clockwise several turns at a time alternately on each
isolator until the fan weight is transferred onto the iso-
lators and the fan raises uniformly off the blocks. Then
remove the blocks.
e. Turn lock nut onto leveling bolt and secure firmly in
place against the top of the mounting flange or frame.
f. Secure isolators to mounting surface.
Floor Mounted Rubber-In-Shear (RIS) Isolators
a. Mount fan and motor on an isolation base (if supplied).
b. Elevate fan to provide room to insert isolators between
the fan and foundation and block in position.
c. Position isolators under fan and secure bolts.
d. Remove blocks and allow fan to rest on floor. Isolators
must be installed on a level surface (leveling should
not be required).
e. Secure isolators to mounting surface.
Figure 1 -Floor Mount Isolators
Rubber-In-Shear Isolator
Spring Isolator