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WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information and
maximum fuse or "HACR" type circuit breaker size. Each
outdoor unit is marked with a "Minimum Circuit
Ampacity". This means that the field wiring used must be
sized to carry that amount of current. Depending on the
installed KW of electric heat, there may be two field power
circuits required. If this is the case, the unit serial plate will
so indicate. All models are suitable only for connection
with copper wire. Each unit and/or wiring diagram will be
marked "Use Copper Conductors Only". These instructions
must be adhered to. Refer to the National Electrical Code
(NEC) for complete current carrying capacity data on the
various insulation grades of wiring material. All wiring
muse conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75° C copper)
for all models including the most commonly used heater
sizes. Also shown are the number of field power circuits
required for the various models with heaters.
The unit rating plate lists a "Maximum Time Delay Relay
Fuse" or "HACR" type circuit breaker that is to be used
with the equipment. The correct size must be used for
proper circuit protection and also to assure that there will be
no nuisance tripping due to the momentary high starting
current of the compressor motor.
The disconnect access door on this unit may be locked to
prevent unauthorized access to the disconnect. To convert
for the locking capability bend the tab located in the bottom
left hand corner of the disconnect opening under the
disconnect access panel straight out. This tab will now line
up with the slot in the door. When shut a padlock may be
placed through the hole in the tab preventing entry.
See "Start Up" section for important information on three
phase scroll compressor start ups.
Manual 2100-277
Page 14
TABLE 4
WALL THERMOSTAT AND SUBBASE COMBINATIONS
T
h
r e
m
o
t s
t a
S
u
b
b
a
s
e
8
4
0
3
0 -
0
2
8
4
0
4
0 -
0
3
1
T
8
7
F
3
1
1
1
Q
5
3
9
A
1
2
2
0
S
8
4
0
3
0 -
4
1
- - -
1
T
8
0
3
4
C
S
8
4
0
3
0 -
1
9
8
4
0
4
0 -
1
2
1
T
8
7
4
C
1
7
6
0
Q
6
7
4
A
1
0
0
1
S
8
4
0
3
0 -
2
1
8
4
0
4
0 -
1
2
2
T
8
7
4
D
1
9
3
4
Q
6
7
4
A
1
0
0
1
S
8
4
0
3
0 -
3
5
- - -
2
1
F
9
5
8 -
0
E
8
4
0
3
0 -
4
3
1
- - -
C
M
2 -
0
0
S
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:
TAP
240
208
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
L
5
5
2
3 .
P
e r
d
o
m
n i
a
e t
F
e
a
u t
e r
s
s
a t
g
e
h
e
a
, t
1
s
a t
g
e
c
o
l o
s y
e t
m
:
h
e
t a
o -
f f
c -
o
l o
F
a
: n
a
u
s
a t
g
e
h
e
a
, t
1
s
a t
g
e
c
o
l o
s y
e t
m
:
h
e
t a
o -
f f
c -
o
l o
F
a
: n
a
u
s
a t
g
e
c
o
, l o
2
s
a t
g
e
h
e
t a
s y
e t
m
:
h
e
t a
a -
u
o t
c -
o
l o
F
a
: n
a
s
a t
g
e
c
o
, l o
2
s
a t
g
e
h
e
t a
s y
e t
m
:
h
e
t a
a -
u
o t
c -
o
l o
F
a
: n
a
s
a t
g
e
c
o
, l o
2
s
a t
g
e
h
e
t a
e l
t c
o r
n
c i
7
d
a
y
p
o r
g
a r
m
m
n i
s
a t
g
e
h
e
a
, t
1
s
a t
g
e
c
o
l o
s y
e t
m
:
h
e
t a
o -
f f
c -
o
l o
F
a
: n
a
RANGE
253 – 216
220 – 187
TABLE 3
M
a
i x
A
W
i
e r
G
a
u
g
e
n I
2
0
g
a
u
g
e
1
8
g
a
u
g
e
1
6
g
a
u
g
e
1
1
4
g
u
a
g
e
1
1
2
g
u
a
g
e
2
o t
o -
n
o t
o -
n
u
o t
o -
n
u
o t
o -
n
g
u
o t
o -
n
m
u
m
F
e
t e
4
5
6
0
0
0
6
0
5
0
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