Fan and Heater | HEATER INSTALLATION |
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Heater Unit | Wiring |
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1.Be sure fan unit is installed and wired to meet local codes. Be sure equipment is well grounded (see page 10).
2.A separate neutral is required for 120 volt heater circuit in 220 volt 1PH and 3PH fan units. For 460 volt fan units a separate 120 volt power supply or transformer is required.
3.Run
4.Orange and red wires should be connected in series with coil in fan. When contacts in heater be- tween these wires open fan
Figure 2: Wiring diagram for the fan and heater unit.
shuts down. Recommended wiring is shown in Figure 2.
5.Black and white wires should be connected to a fused 120V power supply as shown. Green wire should be connected to ground in fan. Heater should have power, even with fan off.
Figure 3: Secondary heater wiring diagram.
SECONDARY HEATER UNIT
1.Secondary heater unit runs as a slave of heater unit #1 and requires no plenum temperature sensor.
2.Run (2) 20 gauge (minimum) wires from sec- ondary heater unit (slave) to heater unit #1
(master).
3.Connect wires as shown in Figure 3.
4.Third heater unit may also be added to system. If adding third unit, run connections to master unit #1 and connect them in parallel with sec ondary heater unit.
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