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BCS6000C-9
To accommodate variations in material moisture or composition and prevent nuisance
shutdowns, provisions are made for automatic draft setpoint increase. The PLC senses
‘puffs’ in the dryer drum and automatically increases dryer draft if a set number of ‘puffs’
occurs within a ten second time window. Set the desired increase via the INCREASE
DRAFT BY _._ _"WC display and enter values in the IF DRAFT DROPS BELOW
_._ _"WC and MORE THAN __ TIMES fields. For example, with settings of 0.02"WC,
0.10"WC and 2 Times, the dryer draft setpoint would be increased by 0.02"WC if dryer
draft dropped below 0.10"WC more than two times within a ten second interval due to
puffing. Note that the Draft Control setpoint returns to its original setting when the
burner is shut off.
TEMPERATURE CONTROL
Select MATERIAL or STACK temperature control.
Set a START AT and RAMP AT percentage for startup. If automatic temperature control
is selected, the burner will drive to the START AT __% setting as soon as the main
flame has been established. The control output will then begin to RAMP AT __% per
minute until the temperature is within 10°F (5.5°C)of setpoint or the output of the
selected control loop is less than or equal to the ramp output. The ramp will then stop
and the control loop will assume control of the burner firing rate.
The burner will be forced to low fire if the stack temperature exceeds the LOW FIRE
DRIVE IF STACK GREATER THAN __ F setting.
Likewise, the burner will be forced to low fire if material temperature exceeds the LOW
FIRE DRIVE IF MATERIAL GREATER THAN __ F setting.
LINKAGE SETUP
After motor calibration is completed and system setup parameters have been set, press the
LINKAGE SETUP button to enter the Linkage Setup mode. The fuel and air control motors will
be released from low fire and respond to the output of the temperature control loop. Return to
the MAIN screen and place the temperature control loop in MANUAL. Drive the motors as
required to adjust fuel and air control valve linkages. Confirm all linkage adjustments and insure
that control arms and linkage rods are tight, then return to the RUN MENU screen and select
either MATERIAL or STACK control to return to normal operation.
Verify that all low fire limit switch contacts are closed, i.e., slot 2, input 5 is ON when the burner
is at 0%, and OFF when the burner leaves low fire. Refer to the burner operating instructions
for switch adjustment.
TIME AND DATE SETTING
Simultaneously press the upper left and lower left corners of the touchscreen to enter the
screen setup mode then select CLOCK to access the Time and Date Settings. Use the keypad
to enter the desired value, then press Sec, Min, Hr, Day, Mon, or Yr as applicable. For
example, to set the month to September, use the keypad to enter ‘9’, then press ‘Mon’. Use the
EXIT buttons to return to normal operation.
DRAFT TRANSMITTER ZERO
Allow the unit to warm up for at least five minutes before adjusting the Transmitter Zero. Use
the shutoff cocks in the transmitter manifold to isolate the transmitter from the dryer, and to
open the LOW pressure tap to atmosphere. The transmitter display and the touchscreen
display of the BCS 6000 should both read 0.00. Reference Appendix I for transmitter
adjustments, if necessary.
