APPENDIX A
A-4
APPENDIX A - WATER HEATER MENU ITEM DESCRIPTIONS - Continued
Generates a valve position based on the error that
exists between the setpoint temperature and the
actual outlet temperature. If the actual error is less
than the proportional band setting (1 to 120°F), the
valve position will be less than 100%. If the error is
equal to or greater than the proportional band
setting, the valve position will be 100%.
This sets the fraction of the output, due to setpoint
error, to add or subtract from the output each minute
to move towards the setpoint. Gain is adjustable
from 0.00 to 1.00 (Default is 0.10).
This value (0.0 to 20.0 min.) responds to the rate of
change of the setpoint error. This is the time that
this action advances the output.
Setting is adjustable from -50°F to +50°F (Default is
zero). It adjusts the output by adding an offset to
the breakpoint chart at minimum flow. This is used
to fine tune Feed-Forward (FFWD) output at low
Setting is adjustable from -50°F to +50°F (Default is
zero). It adjusts the output by changing the scaling
of the breakpoint chart at maximum flow.
Displays the Feed-Forward temperature.
Used to Enable or Disable feedback. Disable this
function for Feed-Forward control only.
Adjustable from 0.01 to 1.00 (Default is 0.05).
Breakpoint at 100%
Thru
Allows breakpoint temperature settings (30°F to
240°F) to be entered for 100% to 0% in 10%
increments. See Appendix D for default values.
Allows Tuning Menu options to be reset to their
Factory Default values.
*Only displayed when Heater Tuning Display is enabled by factory authorized
personnel.
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