Type JTDC Direct Drive Up Blast Power Roof Ventilators
APPLICATIONS: American CoolAir JTDC ventilators are designed are designed for minimal maintenance requirements and efficient, economical operation. They are constructed for rugged industrial service where the fan assembly must be located above the roof. JTDC upblast PRVs can accommodate larger motors and thus provide higher air capacity and static pressure capability. These PRVs can be easily connected to duct work with the optional duct connector accessory.
CONSTRUCTION:Type JTBC 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 JTBC 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 fan is direct driven. JTDC PRVs use from 3 to 6 cast aluminum adjustable pitch airfoil blades that are securely attached to a heavy cast aluminum hub. Blade pitch is set for catalog performance. The JTDC PRV fan blades have specifically engineered airfoil sections and hub sizes for optimum efficiency and physical strength. Standard TEAO motors with prelubricated bearings are used on most models. Extended bearing lube lines are optional.
MATERIALS: The JTDC 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 JTDC 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)