American Dryer Corp. AD-75 - Manual (Page 33)

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3. PIPING/CONNECTIONS
ALL components/materials must conform to National Gas Code specifications. It is important that
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 located at the right side of the base of
the dryer. The minimum pipe size (supply line) to the dryer is 3/4" N.P.T. For ease in servicing, the
gas supply line of each dryer must have its own shut-off valve.
The size of the main gas supply line (header) will vary depending on the distance this line travels
from the gas meter or, in the case of L.P. (liquid propane) gas, the supply tank, other gas-operated
appliances on the same line, etc. Specific information regarding supply line size should be
determined by the gas supplier.
NOTE: Undersized gas supply piping can create a low or inconsistent pressure which will result
in erratic operation of the burner ignition system.