Grain Systems PNEG-584 - Manual (Page 9)

9
SERIES TWO HEATER
1. Be sure fan unit is installed and wired to meet local
codes. Be sure equipment is well grounded (see page 9).
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 S-wire black cord from heater unit to fan unit
and secure to fan.
4. Orange and red wires should be connected in series
with coil in fan. When contacts in heater between these
wires open fan shuts down. Recommended wiring is
shown in Figure 2.
WIRING
HEATER UNIT
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 secondary heater unit.
2. Run (2) 20 gauge (minimum) wires from secondary
heater unit (slave) to heater unit #1 (master).
1. Secondary heater unit runs as a slave of heater unit
#1 and re-quires no plenum or grain temperature sensor.
Figure 3: Secondary heater wiring diagram.
Figure 2: Wiring diagram for the fan and heater unit.
SECONDARY
HEATER UNIT
5. Black and white wires should be connected to a fused
120V power supply as shown. Green wire should be con-
nected to ground in fan.
HEATER INSTALLATION
3. Connect wires as shown in Figure 3.