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Tower-V / Tower-H / Tower-V EC / Tower-H EC
The fan casing is made of steel with a special weatherproof polymer
coating. The air discharge is horizontal in the Tower-H / Tower-H EC models
and vertical in the Tower-V / Tower-V EC models. The fan is equipped with a
terminal box for connection to power mains. The fan is rated for continuous
operation. The impeller is equipped with a protecting grille in Tower-H /
Tower-H EC models. The upper cover is equipped with eye bolts for easy lifting
of the fan to the roof using hoist machinery. A connecting plate is designed to
facilitate mounting to the roof surface or to the mounting frame.
The Tower-H / Tower-V models are equipped with a two-, four- or six-
pole asynchronous motor with an external rotor and a centrifugal impeller
with backward curved blades. Single-phase (E) or three-phase (D) motor
modifi cations. The motor is equipped with ball bearings for a longer service
life. The built-in thermal switches are used for overheating protection. The
thermal switches are equipped with terminals leaded outside for connection
to external protecting controls. The thermal switch terminal leads are
designed for connection to respective circuit of the terminal block, overload
relay or respective terminals of an autotransformer or thyristor speed
controller. Both smooth or step speed control is performed by means of the
thyristor or autotransformer controller (both available upon separate order).
Tower-H EC / Tower-V EC fans are equipped with high-effi
cient external
rotor EC motors and centrifugal impellers with backward curved blades.
The motor is equipped with an integrated overheating protection with an
automatic restart. The fan with a EC-motor is controlled with a 0-10 V external
control signal, e.g. CDT E/0-10 speed controller for EC-motors.
DESIGN
Fig. 1. Tower-V EC design
Fig. 3. Tower-V design
Fig. 2. Tower-H EC design
Fig. 4. Tower-H design
Protecting housing
Cover
Pan
Terminal box
Eye bolt
Base
Electric motor with
an impeller
Protecting grille
Protecting housing
Cover
Pan
Protecting grille
Eye bolt
Terminal box
Electric motor
with an impeller
Cover
Pan
Protecting grille
Eye bolt
Terminal box
Electric motor
with an impeller
Protecting housing
Pan
Terminal box
Base
Electric motor with
an impeller
Protecting grille
