OMM-05-0509-page 3
3. Air Pressure and Suction:
In addition to the normal dangers of rotating machinery, the blower can present additional hazards from the suction or pres-
sure created at the blower inlet or discharge. Suction at the blower inlet can draw materials into the blower where they
become high velocity projectiles at the discharge and cause severe personal injury or death. It can also be extremely dan-
gerous to persons in close proximity to the inlet or discharge as the forces involved can overcome the strength of most indi-
viduals.
NEVER OPERATE A BLOWER WITH A NON-DUCTED INLET AND/OR DISCHARGE. IF THE BLOWER INLET
AND/OR DISCHARGE IS NON-DUCTED, IT IS THE USERS RESPONSIBILITY TO INSTALL AN
INLET AND/OR DISCHARGE GUARD.
NO GUARANTEE OF ANY LEVEL OF SPARK RESISTANCE IS IMPLIED BY SPARK RESISTANT
CONSTRUCTION. IT HAS BEEN DEMONSTRATED THAT ALUMINUM IMPELLERS RUBBING ON RUSTY
STEEL CAN CAUSE HIGH INTENSITY SPARKS. AIR STREAM MATERIAL AND DEBRIS OR OTHER SYSTEM
FACTORS CAN ALSO CAUSE SPARKS.
4. Temperature:
Many blowers, blower components and all motors operate at temperatures that could burn someone if they come in contact
with them. If this potential hazard could exist in your installation, steps must be taken by the user to protect anyone from
coming in contact with this equipment.
5. Spark Resistance:
(Per AMCA Standard 99-0401-86 and ISO 13499)
6. Safety Accessories:
Guards:
All moving parts must be guarded to protect personnel. Safety requirements can vary, so the number and types of guards
required to meet company, local, state and OSHA regulations must be determined and specified by the actual user or
operator of the equipment.
NEVER start any blower without having all required safety guards properly installed. All blowers should be
checked on a regular schedule, for missing or damaged guards. If any required guards are found to be missing or
defective, the power to the blower should be immediately turned off and locked out in accordance with OSHA reg-
ulations. Power to the blower should NOT be turned back on until the required guards have been repaired or
replaced.
This blower can become dangerous due to a potential “windmill” effect, even though all electrical power has been turned
off or disconnected. The blower wheel should be
carefully
secured to prevent any rotational turning
BEFORE
working on
any parts of the blower/motor assembly that could move.
7. Access or Inspection Doors:
II. INSTALLATION
A. Vibration:
Before any mounting method is selected, the user should be aware of the effects vibration will have on the motor and
other parts. Improper blower installation can cause excessive vibration causing premature wheel and/or bearing fail-
ure, that is not covered under warranty. Vibration eliminator pads, springs or bases should be properly installed to pre-
vent any blower vibration from transmitting to the foundation or support structure. If any vibration pads or springs will
be used on Arrangement 1 blowers, the blower and
motor
must be mounted on a
common
base and the vibration
pads or springs should be installed
under
the common blower/motor base.
DO NOT
install vibration pads or springs
under just the blower or motor. This will cause premature blower and/or motor bearing failure and additional vibration
problems with the belt tension.
B. Mounting Methods:
1. Floor Mounted Units;
Centrifugal blowers should be mounted on a flat, level, concrete foundation weighing 2-3 times the weight of the com-
plete blower/motor assembly. It is recommended that the foundation be at least 6” larger than the base of the blower.
I
SHUT THE BLOWER DOWN IMMEDIATELY IF THERE IS ANY SUDDEN INCREASE IN VIBRATION.
NEVER OPEN ANY ACCESS OR INSPECTION DOORS WHILE THE BLOWER IS OPERATING. SERIOUS INJURY OR
DEATH COULD RESULT FROM THE EFFECTS OF AIR PRESSURE, AIR SUCTION OR MATERIAL THAT IS BEING
CONVEYED. DISCONNECT OR LOCK OUT POWER TO THE BLOWER AND LET THE BLOWER WHEEL COME TO A
COMPLETE STOP
BEFORE
OPENING ANY TYPE OF ACCESS OR INSPECTION DOOR.
