ISSUE DATE 12-12-08 REV. DATE 12-12-08 REV. LEVEL: 01 ECN: GP-5179 OIPM P/N 3420466 PG
8
OF
20
INSTALLATION – WIRING
For All Heaters
The FHK-series heaters do not have any onboard controls
and therefore all permanently connected heaters must be
used in conjunction with the applicable Fostoria FPC-
series control center or be wired to a listed, properly
rated safety switch for on/off control. Always disconnect
the power at the circuit breaker 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.
To disconnect power to heaters using wall receptacles
and plugs, simply unplug the heater.
“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.
Cable
Cable strain relief
Wire nut or other
termination
Green to green
Wiring of FHK-2 and FHK-4 Series Heaters
Since all FHK-2 and FHK-4 heaters (except FHK-212-1CA) are received without an electric cable, the
following steps must be taken before attaching the heater to the base:
1. Install a standard or liquid-tight cable connector into the hole in the side of the terminal box. (See page 6
for appropriate cable connector sizes.)
2. Place the properly sized supply cable through the fitting. See page 7 for cable and plug size specifications
or refer to the National Electric Code (NEC).
3. Connect supply cable leads to the element lead wires in the terminal box with wire nuts or other safe
mechanical means. Black and white cable leads can be connected to either element lead wire. Connect
green lead from supply cable to green (bonding) lead in the terminal box. (See illustration shown above.)
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