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FIGURE 6
ELECTRIC HEAT CLEARANCE
WIRING — LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase are equipped with dual
primary voltage transformers. All equipment leaves the
factory wired on 240V tap. For 208V operation,
reconnect from 240V to 208V tap. The acceptable
operating voltage range for the 240 and 208V taps are
shown in Table 4 below.
TABLE 4
OPERATING VOLTAGE RANGE
T
A
P
2
4
0
V
2
0
8
V
TABLE 6
WALL THERMOSTATS
T
h
r e
m
o
t s
t a
3
s
a t
g
e
C
o
8
4
0
3
0 -
6
0
P
o r
g
a r
m
m
1 (
1
2
0
4 -
4
) 5
H
P
r o
C
o
n
A
u
o t
r o
M
a
2
s
a t
g
e
C
o
8
4
0
3
0 -
5
8
E
e l
t c
o r
n
c i
T (
H
5
2
2
0
D
1
1
5
) 1
A
u
o t
r o
M
a
Manual 2100-526E
Page
12 of 24
Side section view of supply air duct for
wall mounted unit showing 1/4 inch
clearance to combustible surfaces.
R
A
N
G
E
2
5
3
-
2
1
6
2
2
0
-
1
8
7
P
e r
d
o
m
n i
a
t n
F
e
a
u t
e r
s
; l o
3
s
a t
g
e
H
e
t a
a
b
e l
N /
o
n
P -
o r
g
a r
m
m
a
b
e l
E
e l
t c
e v
t n
o i
n
l a
n
u
a
c l
h
a
n
g
e
o
v
r e
; l o
2
s
a t
g
e
H
e
t a
N
o
n
P -
o r
g
a r
m
m
a
b
e l
n
u
a
c l
h
a
n
g
e
o
v
r e
T
h
r e
m
o
t s
t a
T
E
C
4
0
2
C
2
M
C
3
0
0
0
C
•
A minimum of 1/4 inch clearance must be
maintained between the supply air duct and
combustible materials. This is required for the
first 3 feet of ducting.
•
It is important to insure that the 1/4 inch
minimum spacing is maintained at all points.
•
Failure to do this could result in overheating the
combustible material and may result in fire.
NOTE: The voltage should be measured at the field
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
Eight (8) wires should be run from thermostat subbase to the
24V terminal board in the unit. An eight conductor, 18 gauge
copper, color-coded thermostat cable is recommended. See
Manual 2100-507 (latest revision) for low voltage wiring
options.
THERMOSTAT WIRE SIZE
T
a r
n
f s
r o
m
r e
V
A
5
0
o r
n
c i
THERMOSTATIC CONTROL
FOR DUAL UNIT APPLICATION
P
e r
d
o
m
n i
a
e t
F
e
a
u t
U -
i n
/ t
2
S -
a t
g
e
H
e
a
/ t
2
S -
a t
o
n
r t
l l o
r e
U -
i n
/ t
2
S -
a t
g
e
H
e
a
/ t
2
S -
a t
o
n
r t
l l o
r e
i w
h t
O
t p
o i
n
l A
r a
m
s
WARNING
TABLE 5
M
W
i
e r
F
L
A
G
a
u
g
e
2
0
g
a
u
g
e
1
8
g
a
u
g
e
2
1 .
1
6
g
a
u
g
e
1
4
g
a
u
g
e
1
2
g
a
u
g
e
e r
s
B
a
d r
S
p
e
c
g
e
C
o
l o
S
e
e
S
p
e
. c
S
g
e
C
o
l o
S
e
e
S
p
e
. c
S
a
i x
m
u
m
D
s i
a t
n
c
e
n i
F
e
t e
4
5
6
0
1
0
0
1
6
0
2
5
0
f i
c i
t a
o i
n
s
h
e
t e
S
3
3
5
3
h
e
t e
S
3
3
7
9
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