9
WARNING
The standard MAWP is per Table 2. The MAWP shall not be exceeded
unless specifi c factory testing of the pressure containing components of the
blower has been performed.
WARNING
Table 2 states the maximum operating speed in RPM (rotations per minute)
and maximum temperature. Do not exceed these limits. The installation of
the blower shall take these critical operating parameters into account and
adequate control features implemented.
WARNING
Upon completion of the installation, and before applying power, rotate the
drive shaft by hand. It must move freely. If it does not, look for uneven
mounting, piping strain, excessive belt tension or coupling misalignment or
any other cause of binding. If blower is removed and still does not move
freely, check inside the blower housing for foreign material.
NOTE
Remove the protective covers from the shaft and inspect for damage.
Carefully check to ensure that no transit damage has been sustained. If damage has occurred from
shipment a claim must be fi led with the carrier immediately; preserve the shipping container for inspection
by the carrier.
NOTE
In the event that your unit sustains damage while being shipped to your
facility, do not return it to the factory without fi rst obtaining shipping
instructions from us.
Protective covers and plugs should not be removed until the connection is being made. Mount the blower
on a fl at, level surface. We recommend a baseplate that is a rigid, solidly supported, and structurally
sound. Shim under the legs where necessary so that each leg of the blower supports an equal share of the
blower weight. This is necessary to prevent eventual twisting of the blower. Make sure feet rest evenly on
the mounting surface before fastening down. Twisting or cramping the blower in mounting will cause rotor
contact and binding during operation, resulting in a condition called “soft foot”. (See the
Soft Foot
section
of this manual for further details and preventative measures.)
A unit that is factory mounted on a base, should not require the above adjustments. However, since
the assembly can become twisted in shipping or installation, checking for soft foot should be done after
installation of the base. Shims may be needed for alignment. Loosen the foot hold-down screws to check
foot contact with the mounting surface. The base should be mounted on a solid foundation or heavy fl ooring,
using shims as necessary at bolting points to prevent warping the assembly. (Also refer to the
Foundation
section.)
Transmission of small operating vibrations to a support structure may be objectionable in some cases. Use
of vibration isolators or vibration absorbing materials can be effective in overcoming this problem. To avoid
casing distortion, the treatment used should be applied under the common motor/blower base or mounting
plate, rather than directly under the feet alone.
Piping should be accurately squared with the blower and supported independently. Stress imparted from
incorrectly aligned piping or mounting will create problems with bearing and seal life, possibly leading to
premature internal contact. The blower should sit stress free and evenly on its supporting surface. Care
should be taken to evenly tighten the mounting bolts to not impart undue stress into the blower. Stress can