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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 are two (2) 1-1/4” gas pipe connections
at the top of the dryer. The dryer has two (2) gas burner boxes and each one has its own 1-1/4” gas
connection.
Inlet connection --- two (2) 1-1/2” F.P.T.
Inlet Supply Size --- 1-1/2” N.P.T. (minimum)
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 consistently between a minimum of 6.0 inches (14.92 mb) water column (W.C.) and a
maximum of 12.0 inches (29.9 mb) water column.
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 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 two (2) 1-1/2” F.P.T. inlet pipe connections extending out of the top of the burner
boxes. The minimum pipe size (supply line) to the dryer is 1-1/2” N.P.T. For ease of servicing, the gas
supply line to 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