American Dryer Corp. AD-310 Phase 7 Tilting - Manual (Page 37)

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2. Technical Gas Data
a. Gas Specifications
Shaded areas are stated in metric equivalents
* Measured at gas valve pressure taps when the gas valves are on.
b. Gas Connections
Run a 1-1/2” pipe from the main gas header to the dryer. There is a 1-1/2” gas pipe connection at the
bottom right side of the dryer’s base.
Inlet connection --- 1-1/2” N.P.T.
BTU/hr input ------ 1,125,000 (283,500 kcal/hr)
1) Natural Gas
Pressure regulation is controlled by both gas valve’s internal regulators. Incoming supply pressure
must be consistent between a minimum of 6.0 inches (14.92 mb) water column (W.C.) and a
maximum of 12.0 inches water column (29.9 mb).
3. Piping/Connections
ALL components/materials must conform to National Fuel Gas Code Specifications ANSI Z223.1-LATEST
EDITION, or in Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or
LATEST EDITION (for General Installation and Gas Plumbing), as well as local codes and ordinances and
must be done by a qualified professional. 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 BTUs being
supplied.
The dryer is provided with a 1-1/2” N.P.T. inlet pipe connection located at the right side of the base of the
dryer. For ease of servicing, the gas supply line of each dryer must have its own shutoff valve.
The size of the main gas supply line (header) will vary depending on the distance this line travels from the
gas meter or other gas operated appliances on the same supply 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.
Natural Gas
Manifold Pressure* 3.5 inches W.C. 8.7 mb
Inline Pressure 6.0 inches - 12.0 inches W.C. 14.92 mb - 29.9 mb