Type JTEBC Up Blast Power Roof Ventilators
APPLICATIONS: American CoolAir JTEBC ventilators are designed to operate reliably in environments where elevated temperature or contaminated air is present. The motor, belt(s), and bearings are isolated from the air stream.
CONSTRUCTION:Type JTEBC ventilators are constructed to discharge vertically so that air velocity seals the opening against rain and snow. When the fan is off, counterbalanced fiberglass damper doors/flaps close by gravity to a weather-resistant closure and serve as a skylight. The JTEBC PRV’s are constructed of heavy gauge steel, up to 1/4” plate. All ferrous materials are painted with thermosetting epoxy paint for corrosion protection. The wind shroud is made of galvanized steel and the damper doors are made of fiberglass with ultraviolet inhibitors. The steel fan shaft is supported by two pillow-block ball bearings that are mounted in an enclosed housing to provide years of service under harsh conditions. Suitable for operation to 250°F. JTEBC PRV’s use 4 or 6 high-strength, cast aluminum airfoil blades that are securely attached to a heavy cast aluminum hub. Blade pitch is set for catalog performance. The JTEBC PRV fan blades have specifically engineered airfoil sections and hub sizes for optimum efficiency and physical strength. Most models are equipped with a variable pitch motor pulley that allow PRV speed adjustment where desirable. The motor is located out of the airstream. Standard TEFC motors are used on most models. A motor cover is standard with all models. Extended bearing lube are optional.
MATERIALS: The JTEBC assembly and curb cap are fabricated of heavy gauge steel and the dampers are constructed of durable fiberglass. The wind shroud is made of galvanized steel. Painted parts are coated with a thermosetting epoxy coating rated for hardness, impact resistance, adhesion and chemical resistance. Parts requiring painting are processed through the American Coolair five-stage pretreatment system prior to the application of any coatings to ensure maximum finish adhesion. These parts use a thermosetting epoxy powder paint with an average thickness of 3 mils and baked at 400°F.
MOTORS: Totally enclosed fan cooled motors are standard. Several alternatives, such as explosion-proof motors, energy efficient motors and severe duty motors, are available to fit your specific needs. Only nationally recognized brand motors with nationwide service facilities are used.
WIRING: Type JTEBC PRVs feature a conduit through the curb cap for convenience in connecting power supply. If a safety disconnect switch accessory is specified, it is mounted above curb cap and attached to the conduit for a rain-resistant connection and switch enclosure.
CERTIFICATION: All Type J ventilators are listed by Underwriters Laboratory, Inc. to U.S. and Canadian safety standards. Certified ratings licensed by AMCA (Air Movement and Control Association, Inc.), for both air and sound performance are available for all Type J and JTE PRVs. (UL705 – E39944)