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American Dryer Corporation
113549 - 8
Consistent gas pressure is essential at ALL gas connections. It is recommended that a 1-inch (2.54 cm) pipe gas
loop be installed in the supply line servicing a bank of dryers. An in-line pressure regulator must be installed in the
gas supply line (header) if the (natural) gas pressure exceeds 12.0 inches (29.9 mb) of water column pressure.
IMPORTANT: A water column pressure of 3.5 inches (8.7 mb) for natural gas and 10.5 inches (26.1 mb)
for propane dryers is required at the gas valve pressure tap of each dryer for proper and
safe operation.
A plugged tap 1/8” N.P.T. minimum, accessible for a pressure gauge connection, must be installed in the main gas
supply line immediately upstream of the dryers.
IMPORTANT: Pipe joint compounds that resist the action of natural and propane gases must be used.
IMPORTANT: Test ALL connections for leaks by brushing on a soapy water solution (liquid
detergent works well).
WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!
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 (Propane 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.
IMPORTANT: The dryer and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping system at test pressures
equal to or less than 1/2 psig (3.5 kPa).
H. WATER SUPPLY CONNECTION
FOR SENSOR ACTIVATED FIRE EXTINGUISHING (S.A.F.E.) SYSTEM
The dryer comes with S.A.F.E. system, connect a 40 ± 20 psig (2.75 ± 1.37 bar) 1/2” diameter water line to supply the
water valve of the S.A.F.E. system with the required water supply. The water connection is located on top of the dryer
on the left hand side. A tap has been supplied for the customer to connect a manual bypass to the S.A.F.E. system.
The same water connection apply to the manual bypass tap as specified above.
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