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WIRING – MAIN POWER
Refer to the unit rating plate and/or Table 2 for wire
sizing information and maximum fuse or "HACR
Type" circuit breaker size. Each 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 must 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.
COMPONENT LOCATION
ELECTRIC
HEATERS
THERMOSTAT
& HUMIDISTAT
CONTROL
DEHUMIDIFICATION
CONTROL
FIGURE 14
SIDE FIELD WIRE
ENTRANCE
REMOTE
THERMOSTAT
TERMINAL
BLOCK
INDOOR
BLOWER
CIRCUIT
BREAKER PANEL
& CONTROLS
LOWER
CONTROL
PANEL
MIS-1577
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.
See Start Up section for information on three phase
scroll compressor start-ups.
The field wiring connections are located behind the top
and hinged panel in the circuit breaker panel. See
Figure 14.
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 form 240V to 208V tap.
The acceptable operating voltage range for the 240 and
208V taps are as noted in Table 3.
TABLE 3
OPERATING VOLTAGE RANGE
T
A
P
2
4
0
V
2
0
8
V
N
O
T
: E
T
h
e
o v
a t l
g
e
s
h
o
u
d l
b
c
o
n
n
e
t c
o i
n
p
o
t n i
n i
h t
e
u
t i n
a
f t
l l u
o l
a
d
(
m
a
i x
m
u
m
a
m
p
e
The standard climate control option is a remote
thermostat connection terminal block. See Figure 16A
for wiring diagram. Compatible thermostats are listed
in Table 4.
The Climate Control Option E is an electronic,
programmable thermostat and a humidistat. The sub
base of the thermostat and the humidistat are factory
wired to the front panel of the unit. Compatible for use
with Energy Recovery Ventilator or Economizer.
The Climate Control Option F is an electronic, non-
programmable thermostat, timer and a humidistat. The
sub base of the thermostat and the timer are factory
wired to the front panel of the unit. Compatible for use
with Energy Recovery Ventilator or Economizer.
R
A
N
G
E
2
5
3
-
2
1
6
2
2
0
-
1
8
7
e
m
e
a
s
u
e r
d
t a
h t
e
f
e i
d l
p
o
w
r e
a
n
d
w
h
e l i
h t
e
u
t i n
s i
o
p
r e
t a
n i
g
a r
g
e
o
p
r e
t a
n i
g
c
o
n
d
t i
o i
n
. )
Manual
2100-380
Page
13
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