Grain Systems PNEG-581 - Manual (Page 21)

PNEG-581 Deluxe Vane Axial Heater 21
5. Heater Operation
Standard Heater Operation
1. Thermostat must be wired into heater control box for heater to operate.
2. Open all manual shut off valves to heater unit.
3. Start fan. This will supply power to heater.
4. Turn thermostat dial to its highest setting.
5. Turn toggle switch ON.
6. Heater should now be lit. If not check to see that all gas is ON.
7. Watch thermometer on plenum and when it reaches desired temperature turn thermostat back
slowly until heater cycles off.
8. Gas pressure should be adjusted so burner is on 75% of the time.
9. Watch plenum temperature as burner goes through a few cycles, to be sure that it is
operating properly.
High-Low Heater Operation
1. High-Limit and cycling thermostat must be wired into heater control box for heater to operate.
2. Open all manual shut off valves to heater unit.
3. Start fan. This will supply power to heater.
4. Turn thermostat dial to its highest setting.
5. Turn toggle switch ON. Both red lights should light up indicating power to the control circuit.
6. Heater should now be lit. If not check to see that all gas is ON.
7. Open Low-Fire ball valve all the way.
8. Turn thermostat dial back slowly until heater cycles to low flame.
9. Adjust ball valve so that low flame pressure is at desired setting.
10. Turn thermostat dial to desired setting and wait for bin plenum to come up to temperature. Heater
should cycle to low flame after a few minutes. If heater does not cycle to low flame increase
high flame gas pressure.
11. Low flame should be adjusted so that temperature drops slowly until burner goes back to
high flame.
12. Watch as burner goes through a few cycles, to be sure that it is operating properly, back to
high flame.