The centrifugal fans can be low pressure Type N with forward
curved blades or, high pressure with Type H with backward
curved blades. All fans are statically and dynamically balanced
after manufacture, thus eliminating any possibility of vibration.
The 3-phase induction fan motors are of the totally enclosed
fan cooled type (TEFC) with class F insulation and IP 54
protection, of single or double speed. Transmission is effected
via V-belts and pulleys with taper lock bushing.
The Fan/Motor assembly is elastically suspended inside the
unit, either by RIS of Spring type vibration isolators, thus
eliminating the need of plasticized fabric, to avoid any
transmission of vibration to the panel.
The use of free flow fans (Plug Fans) in air handling units
is a relatively recent development and offers the following
major advantages:
- Energy saving, since the overall efficiency of the system
is higher.
- The possibility to monitor the airflow with precision,
in combination with frequency inverters and central building
management system.
- Unobstructed and uniform internal unit flow, which leads
to a better performance of inside components such as
coil and filters. In addition, the absence of pulleys has
a positive
effect on flow uniformity.
INTERKLIMA, possessing the necessary expertise and know-how
for this type of application, can offer complete built-in
control panel.
In all fan sections, in addition to the service door, INTERKLIMA
offers as optional a second door with net screen, to eliminate
the use of a belt guard and avoid unauthorized people touching
moving parts. |
