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16. WIRING – LOW VOLTAGE WIRING
Low Voltage Connection
These units use a 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.
"R" terminal is 24 VAC hot.
"C" terminal is 24 VAC grounded.
"E" terminal is the ventilation input. This terminal
energizes any factory or field installed vent option.
"F" terminal is the dehumidification input. This
energizes compressor, blower and 3-way
dehumidification valve.
230/208 VOLT UNITS
All models 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 240V and 208V taps are:
T
A
P
2
4
0
2
0
8
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).
460 VOLT UNITS
All models are equipped with single
primary voltage transformers and no
rewiring is required.
FIGURE 10
INSTALLATION OF FLEXIBLE CONDUIT
R
A
N
G
E
2
5
3
–
2
0
6
2
2
0
–
1
8
7
WALL THERMOSTAT AND SUBBASE COMBINATIONS
T
h
r e
m
o
8
4
0
3
0 -
T
8
7
F
3
8
4
0
3
0 -
1
F
9
3
3 -
8
4
0
3
0 -
T
8
4
0
0
C
Direct Digital Controls (DDC)
For total and proper control using DDC, a total of 5
controlled outputs are required (4 if no ventilation is
installed).
LOW VOLTAGE CONNECTIONS FOR DDC CONTROL
Fan Only
Cooling Mode
Heating Mode
Ventilation
Dehumidification
17. THERMOSTATS
THERMOSTAT WIRE SIZE
T
a r
n
f s
r o
m
r e
V
A
F
5
5
TABLE 4
t s
t a
S
u
b
b
a
s
e
1
s
0
2
8
4
0
4
0 -
0
3
1
1
1
Q
5
3
9
A
1
2
2
0
S
s y
4
9
2
s
-
- -
8
0
E
e l
1
s
4
8
-
- -
S
s y
1
3
1
3
E
e l
Energize G
Energize G, Y
Energize W1
Energize G, E
Energize F
TABLE 3
M
a
D
s i
L
A
W
i
e r
G
a
u
g
e
n I
2
3 .
2
0
g
a
u
g
e
1
8
g
a
u
g
e
1
6
g
a
u
g
e
1
4
g
a
u
g
e
1
2
g
a
u
g
e
P
e r
d
o
m
n i
a
e t
F
e
a
u t
e r
a t
g
e
h
e
a
, t
1
s
a t
g
e
c
o
; l o
M
e
e t
m
:
h
e
t a
o -
f f
c -
o
l o
F
a
: n
o
n
a -
a t
g
e
h
e
a
, t
2
s
a t
g
e
c
o
l o
t c
o r
n
c i
P
o r
g
a r
m
m
a
b
e l
a t
g
e
h
e
a
, t
1
s
a t
g
e
c
o
l o
e t
m
:
h
e
t a
o -
f f
c -
o
l o
F
a
: n
o
n
a -
t c
o r
n
c i
N
o
n
P -
o r
g
a r
m
m
a
b
e l
Manual
Page
i x
m
u
m
a t
n
c
e
F
e
t e
4
5
6
0
1
0
0
1
6
0
2
5
0
s
c r
u
y r
u
o t
u
o t
I
2100-376
21 of 80
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