Grain Systems PNEG-1707 - Manual (Page 14)

14 PNEG-1707 TM-Series Tower Dryer
4. Dryer Installation
Dryer Layout
System Layout
Consider the grain handling system and location of storage bins and existing conveyors when selecting
dryer site, to facilitate wet grain supply and dry grain discharge to conveyors. Other considerations are
prevailing wind direction, fuel and power supply locations, noise and convenience of control location.
Site Location
The dryer should not be operated inside a building or in any area not permitted by electrical code,
fuel installation regulations, or insurance requirements. Do not operate in an area where combustible
material can be drawn into the dryer. Maintain a minimum distance of five feet (5') to other structures.
Refer to dryer specifications
on Page 11 and dimensions on Pages 12 and 13.
Foundation
The dryer should be placed on a reinforced concrete slab located in a well drained area. See Figure 4A
on Page 15, See Figure 4B on Page 16 and Figure 4C on Page 17 for recommended dryer foundations
for soils with minimum soil bearing pressure of 3000 lbs/ft².
Liquid Propane (LP) Dryers with Internal Vaporizers
Liquid Draw
The dryer is designed to operate on liquid propane, with liquid draw from the supply tank. A piping
system is provided on the dryer, including strainer, pressure relief valve, and manual shut off valve.
(See Figure 4D on Page 18.)
Ammonia Tanks
Do not use propane supply tanks which have previously contained ammonia or fertilizer solutions.
These substances are extremely corrosive and damaging to fuel supply and burner parts.
Oil or Water in Tanks
With liquid draw from the supply tank, any water present in the tank may freeze in the piping and controls
in cold weather. To ensure that tanks are free of moisture, the usual precaution is to purge with methanol.
Avoid tanks which may contain an accumulation of oil or heavy hydrocarbons from long use on a vapor
withdrawal system.
Natural Gas (NG) Dryers
Gas Volume and Pressure
The dryer is designed to operate on natural gas having a heat value of about 1000 BTU per cubic foot.
The dryer is equipped with a natural gas supply pipe system connected to the heater solenoid valves.
A regulated pressure of 10 PSI must be provided at the connection to the dryer, with gas available in
sufficient volume to maintain operating pressure.
(See Figure 4E on Page 18.)