6
Accessories and Options
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.
UL/cUL 705
All belt and selected direct drive fans with TE standard
efficiency, single-speed motors are available with the
UL 705 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.)
NEMA-3R
and NEMA-1
Electrical Accessories
Greenheck MSAC Motor Starters
Can be used to coordinate dampers, end switches and
motor starting. They protect the motor, offer control
options, and provide Lockout/Tag out features as well.
(see below)
One-Point Wiring
Available when the following items are selected:
• Common voltages on the motor and the actuator
• Disconnect mounted and wired
• 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.
(see below)
Finish 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 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.
One-Point wiring
Junction Box or
Disconnect
Motor Starter
