Warranty
1018IN050 Rev D 3 Saber Way Ward Hill, MA 01835
Current Switch (P/N 28258)
Installation Instructions
Please Read and Save these Instructions.
a) Installation work and electrical wiring must be done by qualied person(s) in accordance with
all applicable codes and standards, including re-rated construction. All wiring must be performed
in accordance with the National Fire Protection Association’s (NFPA)”National Electrical Code,
Standard #70”-current edition for all commercial and industrial work. All wiring must be performed
by a qualied and licensed electrician.
b) Before installing current switch, fan or dryer, servicing or cleaning unit, or performing any
electrical work switch power off at service panel and lock the service connecting means to prevent
power from being switched on accidentally.
The Current Switch unit, when properly installed, senses a current draw of greater than 1.25 Amps
and automatically switches on the booster fan. No other sensors, switches or speed controls are
required. The current switch is rated for 120V AC Booster Fans requiring a maximum of 2.5 amps
and for Appliances drawing between 1.25 Amps and 40 Amps when in operation.
The current switch must be installed within an electrical enclosure (not supplied). The switch
should be secured within the enclosure via 2 screws (not supplied) installed through the mounting
holes in the switch anges.
The Current Switch Must Be Connected As Follows:
1.Pass Line 1 (Black Lead) of the 240 VAC supply to the Dryer through the ¾” hole in the center
of the current switch and connect the leads to the Dryer as specied by the Dryer Manufacturer.
Removal of Insulation from Line 1 (Black Lead) at the current switch is not required.
Do Not pass any other leads through the ¾” hole in the current switch!
2. Cut the Line lead (Black Lead) of the 120V AC supply to the Fan and remove approximately
½” of insulation from the cut ends. Clamp the bared end of the Line lead (Black Lead) from the
120V AC supply to the L1 terminal of the current switch. Clamp the bared end of the Line lead
(Black Lead) from the Fan to the T1 terminal of the current switch. Connect the leads to the Fan as
specied in the Fan Manufacturers Installation Instructions.
APPLICATION NOTE: CURRENT SWITCH FOR DRYER BOOST FANS
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR
INJURY TO PERSONS, OBSERVE THE FOLLOWING:
120VAC Supply:
Ground (Green or Bare)
Neutral (White)
Line (Black)
To Fan
To Dryer
Note: Some 240V AC systems may only
have 3 wires, Line 1 (Black), Line 2
(Red) and Ground (Green or Bare).
If Lead colors do not match those
shown, a Qualied Electrician should
identify each lead prior to connection.