Grain Systems PNEG-338 - Manual (Page 18)

18 PNEG-338 Portable Dryer Installation and Towing
8. Fuel Connection
Liquid Propane (LP)
Liquid Draw
The dryers have internal vaporizers and are designed to operate on liquid draw from the supply tank. The
tank should be 1000 gallons or larger and should not have a regulator mounted to it. The connection to
the dryer should be with a flexible hose designed for LP gas,
See Chart on Page 19 for proper size.
Consult your LP gas dealer for proper fittings, connection hose and safety controls required to meet local
standards and to conform with National Fire Protection Association standards. The piping train on the
dryer includes strainer, pressure relief valve, electronic safety shut off valve (on some models) and a
pressure regulator between the vaporizer and burner.
Ammonia Tanks
Do not use tanks which have previously been used for ammonia or fertilizer solutions. These substances
are extremely corrosive and will damage fuel supply and burner parts.
Oil or Water in Tanks
With liquid draw from the supply tank, any water or oil present in the tank may freeze in the pipe train or
controls causing damage. To make sure the tank is free of moisture, it can be purged with methanol. Avoid
tanks which may contain an accumulation of oil or heavy hydrocarbon from long use on a vapor withdrawal
system.
Figure 8A Grain dryer connected to a liquid propane tank.
See Fuel Specification Chart
on Page 19
for recommended
line use.