Gas Hookup - ADC AD-575 Installation Manual

3. Gas Hookup (gas dryers only)
The 1-inch MPT gas inlet connection is located to the
rear of the dryer on the upper left-hand side of the dryer
(viewing from the rear). The dryer must be connected to the
type of heat/gas indicated on the dryer data label located in
the right-hand control cabinet. If this information does not
agree with the type of gas available, contact the distributor
who sold the equipment or the factory.
NOTE: Undersized gas piping will result in ignition
problems, slow drying, and increased use of energy and
can create a safety hazard.
The gas input ratings shown on the dryer data label are
for elevations up to 2,000 feet, unless elevation require¬
ments of over 2,000 feet were specified at the time the dryer
order was placed with the factory. The adjustment for dryers
in the field for elevations over 2,000 feet are made by
changing the burner orifices. If this adjustment is
necessary, contact the distributor who sold the dryer or
contact the factory.
NOTE: Any burner changes must be made by a qualified
technician.
For natural gas, the supply pressure delivered to the
dryer must be 7 inches water column minimum and 13 inches
water column maximum. If the supply pressure is higher than
13 inches water column, then an external pressure regulator
must be installed in the supply line to reduce the gas
pressure below 13 inches water column. The pressure supplied
from the gas valve on the dryer to the burner will be
4.0 inches water column.
Dryers manufactured for use with liquid petroleum (L.P.
gas) have no pressure regulator or means of regulation built
into the dryer. Regulation must be provided at the gas
supply (L.P. tank), or in the case where another gas
appliance of a higher required gas pressure is on the same
supply line, separate regulators (vented to the outdoors)
serving each dryer should be provided.
The pressure delivered to L.P. gas dryers must be
10.5 inches to 11 inches water column.
NOTE: Gas connections should be made by qualified personnel
only.
If more than one dryer is being fed by the same gas
supply line, then a 3/4-inch pipe gas loop should be
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