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FIGURE 6
ELECTRIC HEAT CLEARANCE
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 4
OPERATING VOLTAGE RANGE
TAP
240V
280V
TABLE 6
WALL THERMOSTATS
Part Number
3 stage Cool; 3 stage
8403-060
Heat Programmable/Non-Programmable Electronic
(1120-445)
HP or Conventional
Auto or Manual changeover
2 stage Cool, 2 stage Heat
8403-058
Electronic Non-Programmable
(TH5220D1151)
Auto or Manual changeover
Manual 2100-526H
Page
12 of 24
Side section view of supply air duct for wall
mounted unit showing 1/4 inch clearance to
combustible surfaces.
RANGE
253 - 216
220 - 187
Predominate Features
Thermostat
TEC40
MC3000
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.
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.
TABLE 5
THERMOSTAT WIRE SIZE
Transformer
FLA
VA
50
2.1
THERMOSTATIC CONTROL
FOR DUAL UNIT APPLICATION
Predominate Features
2-Unit/2-Stage Heat/2-Stage Cool
Controller
2-Unit/2-Stage Heat/2-Stage Cool
Controller with Option Alarms
Maximum
Wire Gauge
Distance
in Feet
20 gauge
45
18 gauge
60
16 gauge
100
14 gauge
160
12 gauge
250
Bard Specifications
See Spec. Sheet S3353
See Spec. Sheet S3379
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