Page 10
BCS3000M-9
APPENDIX A: FUEL MOTOR SLIDEWIRE CALIBRATION
The burner fuel control motor incorporates a position feedback slidewire. A signal from the
Temperature Controller is connected to the slidewire in order to generate position feedback signal
for the control panel. The following calibration procedure must be performed before operating the
burner for the first time.
RECALIBRATE ANNUALLY OR WHENEVER A CONTROL MOTOR, SLIDEWIRE OR
TEMPERATURE CONTROLLER IS SERVICED OR REPLACED.
1. Turn the panel
POWER
switch to
OFF
. Move the
FUEL SELECTOR
switch to the center (Off)
position and place the
CONTROL MODE
selector in the
AUTO
position.
2. Unplug 3TR relay from its socket and place a
temporary
jumper between control panel
terminal 47 and Ground for a Honeywell M6284C or Barber Colman EA-57 (Medium Torque).
Jumper between 47 and 7 for an Barber Colman EA-71 or EA-73 (High Torque) This will
enable the burner control motor to be driven by the Honeywell Temperature Controller without
having to fire the burner.
3. Turn the panel power on. Enter the calibration mode on the Temperature Controller by
pressing the [
SETUP
] key until the display reads CALIB POSITION.
4. Press the [
FUNCTION
] key to display DISABLE POS PROP then press the [
] key to change
the upper display DO AUTO.
5. Press
[
FUNCTION
] to begin motor calibration. The lower display will read ZERO VAL while the
upper display will show the slidewire feedback value,
6. Wait for the zero value to stop changing and confirm that the motor is in its low fire position
then press [
FUNCTION
] again to advance to SPAN VAL. The control motor will drive open and
the upper display value should increase.
7. After the feedback value has stopped increasing, confirm that the motor has reached its high
fire position then press [
FUNCTION
] followed by
[LOWER DISPLAY]
to complete the
calibration sequence.
8. Turn the panel
POWER
switch
OFF
and return the
FUEL SELECTOR
to the
GAS
or
OIL
position. Replace 3TR relay and remove the temporary jumper from terminal 47.
