MAXIDRY MAXI200, Installation Manual, Page: 50 / 78

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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 (29.8 mb) of water column (W.C.)
pressure.
IMPORTANT: A water column (W.C.) pressure of 3.5 inches (8.7 mb) for natural gas and 10.5
inches (26.1 mb) for liquid propane (L.P.) dryers is required at the gas valve pressure
tap of each dryer for proper and safe operation.
A 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 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 Btu 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).