ISSUE DATE 10-09-03 REV. DATE 5-24-05 REV. LEVEL: 03 ECN OIPM P/N 3420265 PG 10 OF 16
This fixture is equipped with 4 high-temperature
silicone lead wires to accommodate either single
phase or three phase electrical service. They are
shipped wire-tied together. Remove the wire-tie
before making electrical connections.
Wiring connections should always be made through
one of the knockouts in the top wire channel. Consult
the factory, or a qualified electrician for details on
staging.
Supply wires must be copper and rated for at least 90º
C. Wire connectors should also have a minimum
rating of 90º C.
For Use in TOTALLY EXPOSED OUTDOOR
Applications refer to page 9.
WIRING FOR UNITS WITH (2) LAMPS
LAMP 2
LAMP 1
A
B
Connect both wires from one end of heater to “A” and the
remaining wires from the other end to “B” in the control
panel
SINGLE-STAGE WIRING
Two-staging allows either one or both lamps in the heater
to be energized at a time, depending on the signal from
an appropriate two-stage control device (e.g. two-stage
thermostat). One lamp (one stage) may be all that is
required for adequate heating during milder temperature
conditions. Two-staging, therefore, allows for totally off,
half on, or totally on operation; instead of limiting the
operation to 100% “on” or 100% “off”.
Two circuits are required (A1, A2 and C1, C2) for two-stage
wiring.
For two-stage operation connect the wire from the end of one
lamp to A1 and the wire from the same end of the other lamp
to A2, with the corresponding wires from the other ends of the
lamps to C1 and C2, ETC...
TWO-STAGE WIRING
LAMP NO. 2
LAMP NO. 1
A1
C1
A2
C2
A1
STAGE
1
L
I
N
E
L
O
A
D
STAGE
2
L
I
N
E
L
O
A
D
3-PHASE FUSED
DISCONNECT
OR
CIRCUIT
BREAKER
BY CUSTOMER
A2
C1
C2
HEATER NO. 1
B1
B2
A1
A2
HEATER NO. 2
C1
C2
B1
B2
HEATER NO. 3
FOSTORIA
Temperature
C
t l
Device (Thermostat,
4-stage Seq. Input
Controller, Etc.
Common Component Layout for Controlling
Fostoria Mul-T-
Mount Heaters
(2 Stage Wiring Shown)
This Is Not A Wiring Schematic
A1
B1
C1
A2
B2
C2
Electrical Shock Hazard
Disconnect electrical power before servicing.
This appliance must be connected to a
properly grounded electrical source.
Failure to follow these instructions can result
in death or electrical shock.
