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WIRING DIAGRAMS
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C1
T1
T2
F1
F2
L1
L2
L3
Alternate 240V Wiring
Integral 480V/240V
or 120V Transformer
Thermal
Cutout
Ground
Heater Bank
1Ø Motor
Heater
Wiring Comp't
Baffle
For 3 Phase Only
120V Wiring
X1 X3 X2
X4
X1 X3
X2
X4
H1 H2
This Wiring
by Customer
Control
Switch Optional
Thermostat
When Used
Contactor
Fused
Switch
1 or 3 Phase 60 Hz
Power Supply 480 Volts
Figure 5
Use with:
UB-502D-T &
UB-752D-T
480V, 1Ø or 3Ø
Integral
Contactor
Ground
Heater Bank
1Ø Motor
Heater
Wiring Comp't
Baffle
For 3 Phase Only
}
This Wiring
by CustomerThermostat
When Used
Control
Source 120 or
240 Volts, 60 Cycle
1 or 3 Phase 60 Hz Power
Supply 208, 240 or 480 Volts
Fused
Switch
Cutout
Fused
Control Switch
C1
C2
L1
L2
L3
Figure 6
Use with:
UB-502D-R &
UB-752D-R
480V, 1Ø or 3Ø
Alternate 240V Wiring
Integral 480V/240V
or 120V Transformer
Integral
Contactor
Ground
Heater Bank
1Ø Motor
Heater
Wiring Comp't
Baffle
For 3 Phase Only
120V Wiring
X1 X3 X2
X4
X1 X3
X2
X4
H1 H2
}
This Wiring
by Customer
Thermostat
When Used
Control
Switch Optional
1 or 3 Phase 60 Hz Power
Supply 480 Volts
Fused
Switch
Cutout
T1
T2
C1
C2
L1
L2
L3
Figure 7
Use with:
UB-502D-TR &
UB-752D-TR
480V, 1Ø or 3Ø
Integral
Contactor
Ground
Heater Bank
1Ø Motor
Heater
Wiring Comp't
Baffle
For 3 Phase Only
}
This Wiring
by Customer
Thermostat
When Used
1 or 3 Phase 60 Hz
Power Supply 208 or 240 Volts
Fused
Switch
Cutout
T1
T2
L1
L2
L3
Figure 8
Use with:
UB-502D-R
208V, 1Ø or 3Ø
240V, 1Ø or 3Ø
UB-752D-R
208V, 3Ø
240V, 3Ø