113161-14
01422 822282
25
Consistent gas pressure is essential at
ALL
gas connections. It is recommended that a 3/4-inch (19.05 mm)
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. Refer to the
NOTE:
A water column test 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!!!
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).
IMPORTANT:
The dryer
is not
provided with an internal gas shutoff and an external gas shutoff
must be
provided.