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3. Gas Piping
The gas connection to the dryer is made into the 2-inch F.P.T. shut-off valve located in the bottom front
corner of the lower heat console.
The gas pressure supplied to the dryer
must be
between 7-inches (17.41 m bar) and 13-inches (32.34 m
bar) water column (W.C.) for natural gas or between 10.5-inches (26.12 m bar) water column (W.C.) for
L.P. (liquid propane) gas.
If the facilities gas pressure is higher than these values, an external pressure regulator
must be
installed
prior to the dryer to reduce the gas pressure to within the appropriate range.
The dryer
must be
connected to either natural or L.P. (liquid propane) gas indicated on the dryer data label
located on the inner right wall of the electric cabinet. If your gas supply does not match the type of gas for
which the dryer was built, contact your distributor or the
ADC
factory.
1. The installation
must conform
with local codes or, in the absence of these local codes, with the
National
Fuel Gas Code, ANSI Z223.1
or the
CAN.CGA-B149, Installation Codes
.
2. The dryer and it’s 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 psi (3.5 kPa.)
Pipe joint compounds that resist the action of natural and L.P. (liquid propane) gas
must be
used.
Test
ALL
pipe connections for leaks by brushing on a soapy water solution.
WARNING: NEVER
TEST
FOR
LEAKS
WITH
A
FLAME!!!
4. Exhaust Air Ducting
The dryer’s exhaust air
must be
vented to the outdoors by the shortest route possible with the number of
elbows kept to a minimum. The duct
should be
designed and installed by qualified technicians.
Improperly designed duct work reduce the airflow through the dryer, causing improper and unsafe drying
conditions. The static pressure of the air in the duct work
must not exceed
1.25-inch water column
(3.1 millibar). The dryer exhaust 11,600 cfm (cubic feet per minute) - 328.5 cmm (cubic meters per
minute) - of air during the drying cycle, 13,000 cfm (cubic feet per minute) - 368 (cubic meters per minute) -
during cool down. Ducting
must be
sized for the 13,000 cfm 368 cmm (cubic feet per minute) of airflow.
The exhaust vent connection is located on top of the burner and heater section of the dryer. It has rectangle
cross-section and is flanged.
A sheet metal transition piece is supplied to connect a 24-inch (60.96 cm) diameter exhaust duct to the
dryers’ exhaust vent connection. Care
must be
taken in locating this transition piece so that the tilting
tumbler (basket) does not hit the transition piece.
The duct wire connecting the vent to the outdoors
must be
a minimum of 24-inches (60.96 cm) in diameter
for a round duct or 625 square inches (15.87 square meters) for a rectangular duct (22-inches by 22-inches
square duct [55.88 cm x 55.88 cm] would be sufficient).
