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Other Options and Accessories
Electrical
Disconnect Switches
Toggle type and heavy duty disconnect switches are available for positive
electrical shut-off and safety in servicing fans. The following switches are
available to meet individual electrical requirements and can be factory
mounted or shipped loose for field mounting. Wiring from the motor to the
disconnect box is provided with factory mounted disconnect switches.
• NEMA-1 - General purpose
• NEMA-3R - Rainproof
• NEMA 4 - Watertight
• NEMA-3R & NEMA 4 - Heavy Duty
• NEMA-7 & 9 - for Class 1 and Class 2 hazardous locations.
1-Point Wiring
Available when the following items are selected: common
voltages on the motor and the actuator, disconnect mounted
and wired and a wall housing. The wires are pulled from the
motor and the actuator on the damper to the disconnect box.
(Hard wiring of the components to the disconnect switch is by
others.)
Exception: When a specific voltage is not available on the
actuator, Greenheck will provide a hard wired transformer
to the actuator. Greenheck will then pull the wires from the
transformer to the disconnect box.
UL/cUL 705
All belt and selected direct drive fans with TE standard efficiency, single speed motors are available with the
UL705 listing for electrical.
Extended Wiring Pigtail
Available only in conjunction with factory mounted disconnect switches, liquid tight wiring pigtails allow direct
hook-up to the power supply which eliminates field wiring at the fan. Internal or external power supply can be
specified.
End Switches
Factory mounted end switches allow the damper to open completely before the fan is energized. This will reduce
the back pressure and brake horsepower load on the fan motor at startup. (Field supplied motor starter with a
relay is required to complete the wiring on a system using an end switch.)
Options
Coatings
A variety of special coatings ranging from enamels to phenolics are available for decorative or protective
purposes. When a special coating is selected for the fan, all accompanying accessory items are also coated
unless so specified. Consult your local representative for more details.
Welded and Painted Fan Construction
For applications where extra heavy construction is required, welded steel construction is available. With this
option, all stationary connections which are normally bolted are welded and coated with an industrial grade
paint. This option applies to belt drive level 3 fans and direct drive level 2 and 3 fans only.
1-Point wiring
Junction Box
or Disconnect
Propeller Fan Rotation Guide
Propeller blade should cup and throw the air when rotating in the correct rotation as shown below.
NEMA-3R
and NEMA-1