Grain Systems PNEG-1820 - Manual (Page 24)

9. Error Messages and Valve Proving System
24 PNEG-1820 CE Compliant Top Dry Series 2000 Autoflow
Grain High-Limit
The grain temperature in the drying chamber is too high.
Valve Proving System
The main safety shut-off valve is fitted with a proving system which will prevent burner start-up if the valve
is leaky.
Figure 9A
Check the light status on the VPS. Red light indicates leaky valve. VPS is reset by pressing the
Reset button.
High Gas Pressure Switch
In addition to the high pressure relief, the main solenoid valve is fitted with a High Pressure switch. This
will cause the burner to shut down if the pressure exceeds the pre-set level.
High gas pressure switch
Valve proving system
Low-fire adjustment screw
High-low valve