Filter
Top Products
18
Consistent gas pressure is essential at ALL gas connections. It is recommended that a 2-inch (5.08 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 (W.C.) pressure.
An 1/8” N.P.T. plugged tap, accessible for a test gauge connection, must be installed in the main gas
supply line immediately upstream of each dryer.
IMPORTANT: Pipe joint compounds that resist the action of natural gas and liquid propane
(L.P.) gas 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 (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.
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 test of the gas supply system at test pressures
equal to or less than 1/2 psig (3.5 kPa).
F. COMPRESSED AIR REQUIREMENTS
The AD-670 requires compressed air to tilt the dryer, open and close the load doors, clean lint from the fan, and
actuate the sprinkler valve. The dryer cannot operate without a supply of compressed air.
Each dryer must be supplied with 13 cfh (0.368 cmh) of clean, dry, and regulated compressed air at a pressure
of 80 PSI ± 10 PSI (5.51 bars ± 0.68 bars). Failure to meet these requirements can cause premature failure of
components and will VOID THE WARRANTY.
The 1/2” F.P.T. compressed air connection can be found in the base at the rear of the dryer.
WARNING: Compressed air supply to the dryer must remain on at ALL times for the sprinkler
to be operational.