Manual 2100-526H
Page
12 of 24
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).
Eight (8) wires should be run from thermostat subbase to
the 24V terminal board in the unit. An eight conductor,
18 gauge copper, color-coded thermostat cable is
recommended. See Manual 2100-507 (latest revision)
for low voltage wiring options.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase 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 240 and
208V taps are shown in Table 4 below.
TABLE 6
WALL THERMOSTATS
TABLE 5
THERMOSTAT WIRE SIZE
THERMOSTATIC CONTROL
FOR DUAL UNIT APPLICATION
TABLE 4
OPERATING VOLTAGE RANGE
FIGURE 6
ELECTRIC HEAT CLEARANCE
Part Number
Predominate Features
8403-060
(1120-445)
3 stage Cool; 3 stage
Heat Programmable/Non-Programmable Electronic
HP or Conventional
Auto or Manual changeover
8403-058
(TH5220D1151)
2 stage Cool, 2 stage Heat
Electronic Non-Programmable
Auto or Manual changeover
Transformer
VA
FLA
Wire Gauge
Maximum
Distance
in Feet
50
2.1
20 gauge
18 gauge
16 gauge
14 gauge
12 gauge
45
60
100
160
250
Thermostat
Predominate Features
Bard Specifications
TEC40
2-Unit/2-Stage Heat/2-Stage Cool
Controller
See Spec. Sheet S3353
MC3000
2-Unit/2-Stage Heat/2-Stage Cool
Controller with Option Alarms
See Spec. Sheet S3379
Side section view of supply air duct for wall
mounted unit showing 1/4 inch clearance to
combustible surfaces.
WARNING
•
A minimum of 1/4 inch clearance must be
maintained between the supply air duct and
combustible materials. This is required for the
first 3 feet of ducting.
•
It is important to insure that the 1/4 inch
minimum spacing is maintained at all points.
•
Failure to do this could result in overheating the
combustible material and may result in fire.
TAP
RANGE
240V
253 - 216
280V
220 - 187
