B&C Technologies DP-250 Industrial - Manual (Page 36)

Operation
Procedure
IMPORTANT: Dryer blower motor impeller /
fan must turn in the direction indicated on
the directional decal, otherwise dryer
efficiency will drastically be reduced and
premature component failure can result.
HEAT CIRCUIT OPERATIONAL TEST
a. Gas Models
1) When the dryer is first started (during
initial start-up), the burner has a tendency
not to ignite on the first attempt. This is
because the gas supply piping is filled with
air, so it may take a few minutes for this air
to be purged from the lines.
2) The dryer is equipped with a direct spark
ignition (DSI) system which has internal
diagnostics. If ignition is not established
after the first attempt, the heat circuit DSI
module will lock out until it is manually
reset. To reset the DSI system, open and
close main door and restart dryer (press the
"ENTER/START" key).
NOTE: During the purging period, check to
be sure that ALL gas shut-off valves are
open.
3) Once ignition is established, a gas
pressure test should be taken at the gas
valve pressure tap of each dryer to assure
that the water column pressure is correct
and consistent.
NOTE: Water column pressure requirements
(measured at the gas valve pressure tap):
Natural gas: 3.5 to 4.0” water column.
L.P. Gas: 10.5 to 11.0” water column.
b. Steam Models
1) Check to insure that steam damper is
functioning properly.
a) The steam damper should not "slam"
(open or closed) when it reaches the end of
(piston) travel. Additionally, the steam
damper should not bind and/ or stop during
travel. If either of these conditions occur, the
flow control must be adjusted.
Make a complete operational check of ALL
safety-related circuits (i.e., lint drawer
switch, and sail switch on gas models).
IMPORTANT: The drying cylinder is treated
with a protective coating. Tumble old
clothes or material in the basket (tumbler),
using a mild detergent to remove the
protective coating.
8. Each dryer should be operated through
one complete cycle to assure that no further
adjustments are necessary and that ALL
components are functioning properly.
Make a complete operational check of ALL
operating controls.
1) Each microprocessor controller has
been preprogrammed by the factory with
the most commonly used program
selections. A listing of factory programs is
provided in the EDG Manual, shipped with