General Information; Air Pressure And Suction - Greenheck Vektor-MH Installation, Operation And Maintenance Manual

REMOVING FROM STORAGE
As fans are removed from storage to be installed in their
final location, they should be protected and maintained
in a similar fashion, until the fan equipment goes into
operation.
Prior to assembly and installation of the fan and system
components, inspect the fan assembly to make sure it is
in working order.
1. Check all fasteners, set screws on the fan, wheel,
bearings, drive, motor base and accessories for
tightness.
2. Rotate the fan wheel(s) by hand and assure no parts
are rubbing. Access to the wheel is obtained through
a bolted panel located on the side of the fan housing.
3. Ensure proper wheel settings for radial gap and
alignment (see page 16).

General Information

To ensure a successful installation, the instructions in
this manual should be read and adhered to. Failure to
comply with proper installation procedures may void
the warranty.
Unit and System Identification Tags
Each fan has a permanently affixed manufacturer's
engraved metal nameplate containing the model
number and individual serial number.
The tag shown is
an example of an
identification nameplate
on the fan. The
information provides
general details about the
fan, as well as containing specific information unique
to the unit. When contacting your local manufacturer's
representative with future needs or questions, please
have the information on this label available. Tags are
mounted in an area which is clearly visible, usually on
the side of the fan housing.
Fan systems may arrive in component pieces due to
shipping restrictions. Individual components of a system
have matching identification tags which should be
used to identify and assemble the complete system.
Assembling systems with different identification tags
can cause reductions in the fan(s) performance.
Prior to fully assembling and installing the Vektor-MH,
Vektor-MD or Vektor-MS fans, inspect bypass air
plenums and the fan assembly to make sure they are in
working order.
®
Pre-Installation Information
Before installation, it is important to be certain the
mounting surface will bear the operating weight of
the unit and have adequate structural stiffness to
inhibit structural resonance in the roof and supporting
structure. The supporting structural elements should
be designed such that the first natural frequency is a
minimum of 120% of the maximum operating speed of
the fan and accounts for the inertia from the rotating fan
rotor mass. Weak or undersized structural soundness
may impact fan performance. For proper unit operation,
it is also important that it be operated in a completely
level position.
For further details on safety practices involving
industrial and commercial fans, please refer to AMCA
Publication 410.
Electrical Disconnects
All fan motors should have disconnects located in close
visual proximity to turn off electrical service. Service
disconnects shall be locked-out when maintenance is
being performed.
Moving Parts
All moving parts must have guards to protect personnel.
Refer to local codes for requirements as to the number,
type and design. Fully secure fan wheel before
performing any maintenance. The fan wheel may start
"free wheeling" even if all electrical power has been
disconnected. Before the initial start-up or any restart,
check the following items to make sure that they are
installed and secure.
• Do not spin fan wheel faster than the maximum
cataloged fan rpm.
• Adjustments to fan speed significantly affects motor
load. If the fan RPM is changed, the motor current
should be checked to make sure it is not exceeding
the motor nameplate amps.
Guards (Motor Cover, Weatherhoods,
Actuator Cover)
Do not operate fans without proper protective devices in
place. Failure to do so may result in serious bodily injury
and property damage. Check local codes to ensure
compliance for all protective devices.
Plenum Access Doors
Before opening access doors, ensure the fan wheel has
stopped moving and that the wheel has been secured
from being able to rotate. Do not operate fan without
access door in its fully closed position.

Air Pressure and Suction

In addition to the usual hazards associated with rotating
machinery, fans also create a dangerous suction at the
inlet. Special caution needs to be used when moving
around a fan, whether it is in operation or not. Before
start-up, make sure the inlet area is clear of personnel
and loose objects.
Laboratory Exhaust Systems 3