B&C Technologies DE Series Commercial - Manual (Page 29)

ALL dryers are thoroughly tested and inspected before leaving the factory. However, a pre-
operational test should be performed before the dryer is placed into service. It is possible that
adjustments have changed in transit or due to marginal location (installation) conditions.
1. Turn on electric power to the dryer.
2. Make sure the main door is closed and the lint drawer is securely in place.
3. Check the direction of the blower motor impeller (fan) to insure that impeller (fan) rotates in
the direction shown on the directional decal. If the phasing is incorrect, reverse two (2) of the
leads at L1, L2, or L3 of the power supply connections made to the dryer.
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 compo-
nent failure can result.
4.1 Heat Circuit Operation Test
1. Gas Models
(a) 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.
(b) The dryer is equipped with a direct spark ignition (DSI) system which has internal diag-
nostics. 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.
(c) 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): Nat-
ural gas: 3.5 to 4.0” water column. L.P. Gas: 10.5 to 11.0” water column.
2. Electric Models
(a) Check the oven contactor(s) to insure that the electric oven is cycling properly.
(b) Ensure all contactor and input power terminals are TIGHT! Loose connections will
cause premature failure of switchgear components. Check these connections regularly
after the machine is placed in operation.
3. Steam Models
(a) Check to insure that steam damper is functioning properly.
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