Manual 2100-618
Page
12 of 21
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 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.
The unit rating plate lists a “Maximum Time Delay Relay
Fuse” of “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.
See Table 2 for electrical specifications.
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).
WIRING – LOW VOLTAGE WIRING
230/208, 1 phase equipment use 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:
Part Number
Predominate Features
8403-057
(TH3110D1040)
1 stage Cool, 1 stage Heat
Electronic Non-Programmable
Auto or Manual changeover
8403-058
(TH5220D1151)
2 stage Cool, 2 stage Heat
Electronic Non-Programmable
HP or Conventional
Auto or Manual changeover
8403-060
(1120-445)
3 stage Cool; 3 stage Heat
Programmable/
Non-Programmable Electronic
HP or Conventional
Auto or Manual changeover
Dehumidification Output
TABLE 3
WALL THERMOSTAT
Transformer
VA
FLA
Wire Gauge
Maximum
Distance
In Feet
55
2.3
20 gauge
18 gauge
16 gauge
14 gauge
12 gauge
45
60
100
160
250
TABLE 4
THERMOSTAT WIRE SIZE
An 18 gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in this
Manual. See Table below.
Tap
Range
240
253 - 216
208
220 - 187
