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WIRING — LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment 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
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The "R" terminal is the hot terminal and the "C"
terminal is grounded.
"G" terminal is the fan input.
"Y" terminal is the compressor input for cooling.
"W1" terminal is the 1st stage electric heat. The
reversing valve must be energized for heating mode.
"W2" terminal is second stage heat (if equipped).
"F" terminal is the ventilation input. This terminal
energizes any factory installed ventilation option.
R
A
N
G
E
2
5
3
-
2
1
6
2
2
0
-
1
8
7
TABLE 6
WALL THERMOSTAT
T
h
r e
m
o
t s
t a
P
e r
d
o
m
n i
1
s
a t
g
e
C
o
8
4
0
3
0 -
5
7
E
e l
t c
o r
n
c i
T
H
5
2
2
0
D
1
1
5
3
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
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
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).
Five (5) wires should be run from thermostat subbase to
the 24V terminal board in the unit. A five conductor, 18
gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in
Figure 8.
THERMOSTAT WIRE SIZE
T
a r
n
f s
r o
m
r e
V
A
F
5
5
a
e t
F
e
a
u t
e r
s
, l o
1
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
, 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
; 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 v
t n
o i
n
l a
n
u
a
c l
h
a
n
g
e
o
v
r e
LOW VOLTAGE CONNECTIONS
FOR DDC CONTROL
Fan Only
Cooling Mode
1st Stage Heating
2nd Stage Heating
(if employed)
Ventilation
TABLE 5
L
A
W
i
e r
G
a
u
g
e
2
0
g
a
u
g
e
1
8
g
a
u
g
e
2
3 .
1
6
g
a
u
g
e
1
4
g
a
u
g
e
1
2
g
a
u
g
e
e l
t c
o r
n
c i
Energize G
Energize Y, G
Energize W1
Energize W1, W2
Energize G, F
Manual 2100-425B
Page
M
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
11 of 21
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