15
Heaters Using Liquid Propane
When the propane storage tank will not provide sufficient vapor to operate the heater continuously, a
model with a preinstalled vaporizer should have been purchased. The purpose of the vaporizer is to
convert the liquid propane to a vapor by using the heater flame to heat the propane. The dealer selling the
heater usually knows if a vaporizer is needed, and should recommend a model that incorporates one.
NOTE: Heaters are shipped from the factory with vaporizer pushed in as far as housing will allow, thus
protecting the outside plumbing during transportation. Once heater has been installed in conjunction with
your fan, unlock vaporizer mounting screws and move coils to the center of the housing, directly in front
of combustion chamber. An improperly mounted vaporizer could allow liquid propane to freeze in upper
manifold and not allow heater to work properly.
A 1,000 gallon storage tank should provide adequate liquid propane to ignite the heater within its
capacities. The heater should not be used if the tank is less than 20% full. The storage tank should be
equipped with a propane regulator with an outlet pressure of range of 0 to 60 psi, set and locked at 30 psi.
If a vaporizer is to be used, and the tank is less than 50’ away from the heater, the gas supply line from
the storage tank should be 3/8” OD type K copper tubing, and the tank itself should be equipped with an
excess flow valve to stop the flow in the event that the line should break. If tank is further than 50’, a ½”
OD type K copper tubing should be installed.
CAUTION: The gas storage tank should be at least
25 feet from the heater. Local ordinances may require
further distances.
A high pressure 3 to 5 foot flexible hose for use with
LP gas should be used to connect gas supply line to
the heaters Y strainer located on the lower manifold
(see diagram B.)
The gas supply line should be buried at least 6” below
the ground.
Heaters Using Natural Gas
The piping used to connect the heater to the gas supply line should be large enough to maintain 5 psi on
heaters panel mounted gauge while the heater is operating. The contractor or Gas Company should
recommend proper pipe size.
INSTALLING HEATER
WARNING! Be sure to review pervious pages on model selection and warnings. Installation should be
performed only by a qualified dealer, who is experienced and familiar with grain drying equipment, and
with local codes, laws, and ordinances regulation gas and electrical installations. Improper installation
could result in serious bodily injury or property damage.
NOTE: The heater should be handled by the housing legs or mounted handles. Never handle, move or lift
the heater by any parts of the gas manifold as this could loosen or break the manifold and cause leakage.
Connecting To Fan and Bin
Axial and centrifugal heaters should be mounted between the fan and the transition leading to the grain bin.
Air Flow with Axial and Centrifugal Heater
FAN
→
HEATER
→
TRANSITION
→
BIN
B - L P L IQ U ID
S ID E V IE W
Diagram B
