www.PennBarry.com
5
Motor Selection
Both direct drive and belt drive models are available with a wide range of voltages and enclosures (see Motor Selection for a complete
listing). Standard belt drive Open Drip Proof (ODP) ball bearing motors are selected using a conservative portion of the NEMA service
factor. Standard direct drive ODP motors have Class B insulation and internal overload protection. Overload protection is available as an
option on belt drive models. Each size is carefully engineered to match the motor to the wheel capacity.
Sound Performance
Fumex units deliver outstanding air performance with minimal noise and have the lowest AMCA licensed sound performance in the
industry.
Curb Caps (Base)
Curb caps for direct drive and standard duty belt drive models are available in galvanized steel (standard) or aluminum (optional). Curb
caps for high capacity belt drive models are available only in aluminum. All curb caps have fully welded corners and are pre-punched to
ensure a leak-tight and easy installation.
Forced Motor Cooling
Motors and drive components are located out of the airstream in a separate compartment. A cooling tube between the motor dome and
discharge apron enables fresh air to be drawn into the motor housing during fan operation. This positive cooling promotes longer life
for motor and drive components.
Easy Maintenance Access
By removing the fasteners, the motor dome lifts off for complete access to all the drive components.
Vibration Isolators
Multidirectional, rubber-in-shear vibration isolators mitigate residual vibration transmission from the unit to the building.
Structural Integrity
Durable housings of spun aluminum have a high strength-to-weight ratio and incorporate a rolled bead for additional strength. There
are no welds to break or seams to leak. The heavy-gauge motor mounting platform provides positive rigidity between all components
of the power train assembly.
Internal Bracing
Tri-Strut™ supports transfer the weight of the motor mounting platform directly to the curb mounting surface. The aluminum spun
housing, therefore, is not used to support any weight. For grease laden applications, there is less surface for grease build-up during
normal operation.
Solid Steel Shafts
Sized so the first critical speed is a minimum of 130% of maximum cataloged operating speed, shafts are precision ground and polished.
Self-Aligning Bearings
Heavy-duty bearings are sized for a minimum L50 life in excess of 200,000 hours of operation. One hundred percent factory tested, they
are designed for air handling applications.
Drives and Belts
Pulleys are pre-set to the specified RPM. Cast iron variable pitch pulleys are adjustable, allowing for field balancing based on actual field
conditions. All pulleys are sized for at least 150% of the driven horsepower.
Conduit
Both direct and belt drive units include a large 1” nominal conduit chase (not available on heat and smoke removal units; wiring is run via
the cooling tubes) for easy installation of wiring from the motor dome to below the curb cap. Fatrap units are factory wired to an external
NEMA 3R junction box.
FEATURES & BENEFITS
