FOR ALL HEATERS
Wiring procedures and connections shall be in
accordance with the national and local authority
having jurisdiction. The FSS series heaters do not
have any on board controls and therefore must
be used in conjunction with an applicable control
center or be wired to a listed, properly rated safety
switch for on/off control.
Always disconnect the power at the circuit break-
er or disconnect switch before installing electric
power to the heater. If the breaker or disconnect
switch cannot be seen from where you will be
working, lock it in the open position and tag it to
prevent unexpected application of power. Failure
to do so could result in fatal electric shock. Do not
depend on a thermostat or other switch as the sole
means of turning off power to the heater. When
bringing supply wiring to the heater always route it
away from the area directly above the heater and
away from the sides of the heater where tempera-
tures may be dangerously high.
WIRING OF THE FSS SERIES HEATERS:
1. The FSS-14 and FSS-31 models are available
in single phase only. All FSS-43 and FSS-95
models (except the FSS-4327-1) and FSS-
9527-1) can be wired for single phase or three
phase applications. See wiring diagrams on
page 10.
2. Remove the cover from the terminal box.
3. Connect the lead wires to the 90°C rated sup-
ply wiring routed into the splice box with wire
nuts or other safe mechanical means. Black
and white supply leads can be connected to
either element lead wire. Be sure green lead
from supply and green (bonding) lead from the
terminal box are connected.
4. Reinstall splice box cover.
5. Apply power to circuit.
ISSUE DATE 07-2015 REV. DATE ------------ REV. LEVEL: - ECO 1-7090 OIPM P/N 8419 PG 10 OF12
INSTALLATION - WIRING
“Bonding is the intentional electrical connection
of all non-current carrying metal parts to the
equipment grounding (green) conductor of the
heater and then terminating this green conductor
to the green conductor of the power supply to form
a low-impedance path back to the power supply
so that safety devices (circuit breakers, fuses)
can quickly remove dangerous touch voltage from
these parts when a fault occurs.
Always securely connect the green conductor
from the power supply to the green conductor
of the heater.
ELECTRICAL SHOCK
HAZARD
• Serious injury or death may
occur.
• Disconnect heater and lock out
from electrical supply before
installing or servicing.
• Always securely connect
green wire on heater to
bonding (green) wire from
electrical supply.
