3. Fused heaters: (See Fig. 8, 12, 13, and 14.)
a. The 15- and 20-kw heaters can be wired for single- or dual-supply circuits. Single-supply circuit wiring requires a factory-authorized,
single-point adapter kit.
b. The 24- and 30-kw heaters can be wired for single- or multiple-supply circuits. Heaters are factory wired for single circuit 3 phase. To
convert heaters to single circuit single phase, disconnect yellow lead from L3 and connect to L1. Disconnect black lead from L3 and
connect to L2. To convert heaters to multiple-supply circuit single phase, remove and discard leads between single-circuit terminal block
and fuse block. Remove and discard single-circuit terminal block. Attach L1 through L6 power leads as indicated on label next to fuse
block.
Fig. 8—15 and 20kw Fused Heaters
(15 and 20kw fused heaters are factory wired for dual
supply circuits. Single supply circuit is possible
with approved single point wiring kit.)
A00078
Field Ground
Wiring
L4
L2
Field Ground
Wiring
L1
L3
Circuit 1 : L1-L2
Circuit 2 : L3-L4
Ground lug
Ground lug
Field P
o
w
e
r
Wir
ing
Fig. 6—3, 5, 8, 9, 10kw Non-fused Heaters
(9kw is field convertible to 3-phase.
See Procedure 3. B. 1. c.)
A00076
Yellow
Black
Ground
Lug
Field
Ground
Wiring
L1
L2
Field
Power
Wiring
Fig. 9—15 and 20kw Circuit Breaker Heaters
A00079
Field Ground
Wiring
L1
L2
Field Ground
Wiring
L3
L4
Circuit 1 : L1-L2
Circuit 2 : L3-L4
ON
OFF
ON
OFF
Field P
o
w
e
r
Wir
ing
Ground lug
Ground lug
Fig. 7—5, 8, 10kw Circuit Breaker
and Disconnect Heaters
A00077
Ground
Lug
Field
Power
Wiring
Field
Ground
Wiring
ON
OFF
L1
L2
—7—
