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American Dryer Corp. SL31AD-15 User Manual

Page 14

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H. GAS DRYERS

ALL dryers are provided with 1/2” gas lines. Consult your local gas supplier for correct line size and pressure.
The built in regulator provides 3.5 inches (8.7 mb) water column (W.C.) at the manifold for natural gas. Liquid
propane (L.P.) gas must be regulated in line by the supplier to 10.5 inches (26.1 mb) water column. A shutoff
valve should be installed at the rear of the dryer for easy servicing and safety. Gas connections should only
be
made by qualified personnel.

I. GAS FLAME ADJUSTMENT

Dryers are equipped at the factory with the correct orifice and are adjusted for proper performance. Should
further adjustment be needed, rotate the air adjustment plate until yellow flame is at a minimum.

IMPORTANT: Test ALL connections for gas leaks by brushing on a soapy solution (liquid detergent

works well).

WARNING: NEVER TEST FOR GAS LEAKS WITH A FLAME!!!

J. STEAM DRYERS (LOW-PRESSURE)

Low-pressure steam (10-15 psig [0.69-1.03 bars]) has a minimum push through the systems, therefore, the
following is recommended for 3 to 7 dryers:

1. 3” main steam line

2. 2” return line

3. 1” line from main line to each dryer

4. 1” line from dryer to return lines

Piping should be installed with good commercial steam system practices. (Refer to the illustration below.)