Boiler Control Instruction & Operation Manual
Page 4
6
of
68
Setup & Tuning
Press
Lead-Lag Tuning
within the Tune menu to adjust the following parameters
Factory
Setting
Range /
Choices
Parameter and Description
3
1 to 5
Response Speed
This parameter adjusts the Sequence Master temperature controller Proportion Integral
Derivative (PID) values. Higher values cause a larger firing rate change for each
degree of temperature change. If set too high firing rate
“overshoots” required value,
increases to high fire causing the temperature to exceed the
“Diff Above” setpoint and
cycle the boiler unnecessarily. Lower values cause a smaller firing rate change for
each degree of temperature change. If set too low, the firing rate response will be
sluggish and temperature will wander away from setpoint.
22
0 to 400
Proportional Rate
Proportional Gain value for Sequencer control modes. A larger gain value results in
tighter, more active, PID control. Gain is the primary PID modulation rate tuning
adjustment and provides the immediate modulation rate response. Pick a gain
based on the desired initial response. The burner modulation rate can oscillate if the
Proportional Gain is too large.
7
0 to 400
Integral Rate
Integral gain value For Sequencer control Modes. A larger value makes the Integral
ramp in less time (i.e., faster). Integral is a secondary PID modulation rate tuning
adjustment that ramps the output over time (typically minutes). Based on the selected
Local PID P, select the corresponding (from above table) Integral value. Repeats per
minute between 0.5 and 2.0 are typical. The burner modulation rate can oscillate if
the Integral time is too large.