Installation Instruction - Breeze KBB Series User Manual

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4. INSTALLATION INSTRUCTION

• Move the fan to the desired location.
• Check and tighten fasteners throughout the unit and then fasten securely through mounting holes provided in the base angles.
• The unit must be set level (shimming may be necessary).
• Flexible duct connections and vibration isolators should be used where noise is a factor.
• The motor voltage and ampere rating must be checked for compatibility with the electrical supply prior to final electrical connection.
• Supply wiring to the fan must be properly fused, and conform to local and national electrical codes.
4.1 Installation Guideliness
Ducted Inlet Installations:
Inlet Duct Turns - Installation of a duct turn or elbow too close to the fan inlet reduces fan performance because air is loaded
unevenly into the fan impeller
or elbow and the fan inlet.
Once fan
impeller diameters
Turning
Vanes
CORRECT
Inlet Spin - Inlet spin is a frequent cause of reduced fan performance. The change in fan performance is a function of the intensity of
spin and not easily defined. The best solution is proper duct design and airflow patterns. Turning vanes reduce the effects of inlet
spin.
Turning
Vanes
Ducted Outlet Installations:
Discharge Duct Turns- Duct turns located near the fan discharge should always be in the direction of the fan rotation. Fan
performance is reduced when duct turns are made immediately o ffthe fan discharge. To achieve cataloged fan performance there
should be at least one equivalent duct diameters of straight ductwork between the fan discharge and any duct turns.
Length of Straight Duct
CORRECT
Non-Ducted Installations:
Inlet Clearance - Installation of a fan with an open inlet too
close to a wall or bulkhead will cause reduced fan performance.
It is desirable to have a minimum of three-fourths of a
diameter between the fan inlet and the wall.
Single Fan Installation
01 fan
impeller
diameter
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. To achieve full fan performance, there should be at least one fan
CORRECT
impeller
FCS-FCD | BCS-BCD SERIES
impeller
INCORRECT
INCORRECT
Free Discharge - Free or abrupt discharge into a plenum
results in a reduction in fan performance. The effect of
discharge static regain is not realized.
USER'S MANUAL
diameters between the turn
INCORRECT
08