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The input ratings shown on the dryer data label are for elevations up to 2,000 feet, unless elevation
requirements of over 2,000 feet were specified at the time the dryer order was placed with the factory.
The adjustment or conversion of dryers in the field for elevations over 2,000 feet are made by changing
each burner orifice. If this conversion is necessary, contact the distributor who sold the dryer or contact
the ADC factory.
2.
Technical Gas Data
a.
Gas Specifications
* Measured at gas valve pressure tap when the gas valve is on.
W.C. = Water Column in inches.
N.P.T. = National Pipe Thread.
b. Natural Gas
Regulation is controlled by each gas valve's internal regulator. Incoming supply pressure must be
consistent between a minimum of 6.0 inches and a maximum of 12.0 inches water column pressure.
c. Liquid Propane (L.P.) Gas
Dryers made for use with L.P. gas have the gas valve's internal pressure regulator blocked open so that
the gas pressure must be regulated upstream of the dryer. The pressure measured at each gas valve
pressure tap must be a consistent 10.5 inches water column. There is no regulator or regulation
provided in an L.P. dryer. The water column pressure must be regulated at the source (L.P. tank) or an
external regulator must be added to each dryer.
3.
Piping Connections
ALL components / materials must conform to National Fuel Gas Code specifications, or in CANADA, the
Canadian Installation Codes (for General Installation and Gas Plumbing).
It is important that the gas pressure regulators meet applicable pressure requirements and that gas meters
be rated for the total amount of ALL the appliance Btu's being supplied.
The dryer is provided with a 3/4" N.P.T. inlet pipe connection at the upper right hand corner (when viewed
from the rear) of each dryer. It is recommended that a gas shutoff valve be provided to the gas supply line
of each dryer for ease of servicing.
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