j. Verify that the motor has reached high fire then press the [FUNC] key to enter the motor span value Press the
[LOWR DISP] key to exit the calibration mode and return the controller to normal operation.
Move the CONTROL MODE selector switch to the STACK position and repeat steps e thru j above for the STACK
Verify the setpoint of the High Stack Temperature Limit alarm in BOTH controllers as follows:
If the process system, such as a rotary dryer application, has a fabric filter dust collector (baghouse),
consult the manufacturer for recommended baghouse temperature limitations.
a. Press and hold the [SET UP] key until the display reads SETUP ALARMS.
b. Press the [FUNC] key once to change the lower display to A1S1 VAL. The upper display will show the current
alarm set point. Use the [?] or [ ] Arrow key to change to the desired High Stack Temperature Limit set point
c. Press the [LOWR DISP] key to exit the Set Up mode and return the controller to normal operation.
The two UDC3000 controllers are interchangeable. In the event of a Stack controller failure the Material
controller can be moved to the Stack Temperature controller housing and burner operation can be
continued utilizing STACK TEMPERATURE control. Before exchanging instruments VERIFY THE
SETTING OF THE HIGH STACK TEMPERATURE LIMIT ALARM.
Place the Temperature Controller in the Manual Mode and drive the Burner Control Motor to Its 0% and 100%
positions. Adjust the Burner Control Linkage, If required, to ensure that the Air Control Valve Is rotated through Its full
travel and that the Fuel Control Valve(s) move smoothly from their LOW FIRE to HIGH FIRE settings
Adjust the Low Fire Limit Switch cam so that the switch contacts are CLOSED when the burner is in the 0% position,
and so the contact OPENS when the burner position is slightly increased.
Adjust the Primary Air Limit Switch, if applicable, so that the switch contacts are CLOSED when the Primary Air Valve
is fully OPEN.
Turn the panel POWER switch to the OFF position. REMOVE THE TEMPORARY JUMPER WIRE FROM BETWEEN
TERMINALS 18 & 54 AND REPLACE RELAY R4.
Open the front of the panel and adjust the Purge Timer Potentiometer to obtain the desired Purge Time delay. Four
system air changes are required. Multiply the system volume (cu. ft.) by 4 Divide the result by the system purge fan
volumetric rate (standard cu. ft. per minute). The result will be the required Purge Time in minutes.