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NEVER OPERATE A FAN WITH A NON-DUCTED INLET AND/OR DISCHARGE. IF THE FAN 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:
Some fans, fan 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 fan without having all required safety guards properly installed. All fans should be checked on
a regular schedule, for missing or damaged guards. If any required guards are found to be missing or defec-
tive, the power to the fan should be immediately turned off and locked out in accordance with OSHA regula-
tions. Power to the fan should NOT be tuned back on until the required guards have been repaired or replaced.
This fan can become dangerous due to a potential “windmill” effect, even though all electrical power has been turned off
or disconnected. The propeller should be
carefully
secured to prevent any rotational turning
BEFORE
working on any
parts of the fan/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 fan, motor
and other parts. Improper fan installation can cause excessive vibration causing premature prop and/or motor bearing
failure, that is not covered under warranty. Vibration eliminator pads, springs or flexible connectors should be properly
installed to prevent any fan vibration from transmitting to the foundation, support structure or ducting.
B. Mounting Methods:
1. In Duct Work
Any component of a building structure that will be supporting the fan and any duct work must have the weight load
capacity and be rigid enough to support the weight of the fan without bending, bowing or flexing during operation. If not,
severe vibration can occur that could lead to fan and/or structural failure. Consult an architectural or structural engineer
for assistance.
Model
DDF
fans are designed to be mounted in duct work of the same diameter as the fan. The flange rings are pre-
punched and should be bolted to duct flanges having the same dimensions. We do offer companion rings, as an option,
to make the connection process easier. These fans can be mounted with the motor shaft in a horizontal or vertical up-
blast (motor shaft up) configuration.
WARNING
DANGER
I
SHUT THE FAN DOWN IMMEDIATELY IF THERE IS ANY SUDDEN INCREASE IN VIBRATION.
WARNING
NEVER OPEN ANY ACCESS OR INSPECTION DOORS WHILE THE FAN IS OPERATING. SERIOUS INJURY OR
DEATH COULD RESULT FROM THE AFFECTS OF AIR PRESSURE OR AIR SUCTION. DISCONNECT OR LOCK
OUT POWER TO THE FAN AND LET THE PROP COME TO A COMPLETE STOP
BEFORE
OPENING ANY TYPE OF
ACCESS OR INSPECTION DOOR.
DANGER
