Component Installation
36
CLCH-SVX013B-EN
Component Installation
The components in the air handler may have installation
requirements that could affect the unit’s performance.
Dampers
Dampers are factory-installed and adjusted and can be
found in mixing box sections. There are two damper blade
configurations available: parallel-blade and opposed-
blade.
Traq™ dampers are another type of damper available in
mixing box sections. Traq dampers have only one blade
configuration - opposed. They have two control
applications available - standard Traq dampers and low-
flow Traq dampers. Low-flow Traq dampers are always not
linked and consist of two damper sets - one set for
minimum outside air measurement and one set for
economizing. Each will have its own VCM.
The air handler is available with factory-mounted controls
or end devices. If the unit is not ordered with controls or
end devices, it is the installer’s responsibility to provide
and install the damper actuators. To size the actuators see
“Damper Torque Requirements,” p. 36
.
Mixing sections are designed for the damper actuators to
be direct coupled and installed in the air stream. If other
provisions are required, modifications to the section will
be the responsibility of the installing contractor.
Damper Torque Requirements
Horizontal Blade Rectangular Dampers
•
Parallel airfoil damper = 7.00 in.-lb./ft
2
•
Opposed airfoil damper = 5.00 in.-lb./ft
2
Vertical Blade Dampers
•
Parallel airfoil damper = 12.00 in.-lb./ft
2
•
Opposed airfoil damper = 12.00 in.-lb./ft
2
Traq Dampers
•
Traq 13-in. diameter damper = 18.00 in.-lb./ft
2
•
Traq 16-in. diameter damper = 22.50 in.-lb./ft
2
•
Traq 20-in. diameter damper = 33.00 in.-lb./ft
2
•
Traq 24-in. diameter damper = 36.00 in.-lb./ft
2
•
Traq 28-in. diameter damper = 37.50 in.-lb./ft
2
Fans
The fan section can be configured as either draw-thru or
blow-thru. Review the submittals and unit tagging
information prior to assembly to determine placement.
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures
recommended in this manual could result in exposure
to electrical, mechanical or other potential safety
hazards. Always refer to the safety warnings provided
throughout this manual concerning these procedures.
Unless specified otherwise, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
Fan Isolation
The fan-and-motor assembly is internally isolated. The fan
and motor bases are bolted to a minimum of four spring
isolators. The isolators are secured to the fan section
support base.
Shipping tie-down bolts are bolted adjacent to the
isolators between the fan isolation base and the isolator
support frame. The shipping tie-downs secure the
isolation base to the support assembly to prevent any
damage to the fan section during shipment.
Note:
Remove the tie-downs
only
if the factory-provided
isolation is to be used.
Adjusting the Isolators
Once the shipping tie-downs are removed and the internal
isolation is released, it may be necessary to adjust the
isolators to achieve the proper operation height of the fan
and motor isolation base.
Minimum required clearance is 0.5 inches. To determine
the isolator clearances on all unit sizes, measure between
the top of the cabinet channel and the bottom of the
isolation base channel.
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