14
SHUTDOWN FEATURES
SHUTDOWN INDICATORS
The C-2100B series dryers are equipped with a safety
circuit monitor which helps to locate the cause of a
dryer shutdown by energizing an indicator light.
When a safety shutdown occurs, the control circuit will
be disabled, the horn will sound, the Dryer Operator
Light (if set to monitor position) will go off, and the
appropriate shutdown indicator light will be energized.
The indicator will stay energized until the control stop
or start button is pushed. Be certain to check the indi-
cator lights before stopping the dryer control. If the
shutdown device requires manual resetting or has not
yet automatically reset (due to cool down time
required), the light will reappear when a control start is
attempted.
NOTES:
•
If, during periods of troubleshooting, the horn
becomes an annoyance, it can be temporarily disabled
by pulling the fuse on the RH end of the terminal strip
in the upper part of the ASC control box (see Fig. 6-4).
The horn volume can be adjusted by turning the allen
screw located on the horn's case.
•
NO indicator light will come ON if a motor overload
relay trips open. Also, note that the shutdown detector
unit is designed so that if a malfunction occurs within
the unit, such as a bad light or poor wiring connections,
it will not prevent the dryer from operating but will only
cause abnormal action of the indicator lights.
RESTARTING DRYER AFTER A SHUTDOWN
1. Investigate the cause of shutdown and perform any
necessary adjustments or corrections. For addi tional
information, refer to "Control Circuit Not Energized"
heading within Section 9. As a future reference, it may
be advisable to make a record of the cause, as indicat-
ed by the shutdown indicator.
NOTE:
On rare occasions, several dryer safety
devices may act to interrupt the safety control circuit
simultaneously. If this occurs, the LOWEST NUMBER
INDICATOR LIGHT on the de tector will always take
priority, as the unit is built to indicate only one cause at
a time
2. Press the dryer START button. When the start button
is pressed, the dryer control light should come ON,
indicating that all safety devices have been reset and
the dryer is operational.
Following is a list of shutdown indicators. For the most
common shutdown causes, see Section 9,
Troubleshooting.
ADJUSTING DRYER AIRFLOW
C-2100B DRY/VACUUM COOL DRYERS
The fresh air louvers, located on the sides of the fan-
heater module, can be adjusted to balance the amount
of cooling air required. Opening the louvers wider will
reduce the amount of vacuum cooling and increase the
drying airflow rate. Closing the louvers will increase
the cooling airflow rate while reducing the amount of air
to the drying zone.
In general, the louvers should be adjusted to create 2
to 2½ inches of water column (wc) vacuum in the cool-
ing plenum. The louvers should be adjusted to approx-
imately 8% open. With the HR-2100B Heat Reclaimer
option, the louvers will be approximately 2% open.
NOTE: As the louvers are adjusted, both drying and
cooling capacities are affected. Higher static pressures
will increase cooling capacity, but decrease drying
capacity. Lower static pressures will increase drying
capacity but decrease cooling capacity. Also, the
unload rate can have an impact on the louver settings.
Lower unload rates can be operated at lower static
pressures since the grain is in the cooling section of the
dryer for longer time periods.
When drying crops wetter than 25% moisture, dryer
capacity may be improved by increasing the fresh air
louver opening. Monitor dry grain temperature for ade-
quate cooling when making final adjustments.
The louvers can be adjusted by moving the HFWL 1/2-
13 nuts located on the louver adjusting stud protruding
through the dryer floor panel on each side of the fan-
heater module. Fine adjustments can be made by
rotating the louver handle assembly. By moving the
louver handle assembly toward the center of the dryer,
the HFWL nut will pass through the keyhole slot in the
floor panel allowing the louvers to be quickly moved to
a closed position when not in use. When adjusting lou-
vers, it is best to open each side approximately the
same.
When dryer is shut off, the pressure gauge (located on
the right-hand side of the fan motor housing just to the
right of the ASC control box) should return to a zero
reading. Over time, however, the gauge may drift out
of calibration. If this occurs, refer to Section 7, Service,
for re-zeroing procedure.
SHUTDOWN INDICATOR LIGHTS - ASC PANEL
• METER ROLL MONITOR (auto resets immediately)
• LOW GRAIN (auto resets immediately)
• PLENUM HI-LIMIT (auto resets after cooling
• GRAIN HI-LIMIT (auto resets after cooling)
• BURNER LOCKOUT (reset manually by pressing Flame
Safeguard button after cooling)
UNMONITORED SAFETY SHUTDOWN DEVICES
• Unload auger overload relay
• Load auger overload relay
• Fan overload relay
• SCR overload relay
• Discharge shut-off switch
• Auxiliary load overload relay (optional)
• Auxiliary unload overload relay (optional)
Содержание C-21100B
Страница 22: ...20 ...
Страница 36: ...34 Fig 6 3 LP vaporizer assembly Fig 6 4 ASC control panel ...
Страница 49: ...Fig 8 1 Power circuit 220V 3 PH for C 2130B C 2140B C 2160B only 47 4B0280A TIF ...
Страница 50: ...48 Fig 8 2 Power cirucit 220V Part wind start for C 2175B C 21100 models only 4B0280C TIF ...
Страница 51: ...49 Fig 8 3 Power circuit 440V 3 PH for all C 2100B models 4B0280B TIF ...
Страница 52: ...Fig 8 4 Control circuit all models except part wind start p 1 of 3 50 4B0280D TIF ...
Страница 53: ...Fig 8 4 Control circuit all models except part wind start p 2 of 3 51 4B0280E TIF ...
Страница 55: ...Fig 8 5 Control circuit part wind start models only p 1 of 3 53 4B0280H TIF ...
Страница 56: ...Fig 8 5 Control circuit part wind start models only p 2 of 3 54 4B0280I TIF ...
Страница 58: ...Fig 8 6 Safety circuit portion of control circuit all models 56 4B0280G TIF ...
Страница 65: ......