AERCO C-More Controls - Manual (Page 20)

C-MORE CONTROL PANEL OPERATION
`Table 3-1. Menu Item Descriptions - Continued
MENU LEVEL & OPTION DESCRIPTION
TUNING MENU
Prop Band Generates a fire rate 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 fire rate
will be less than 100%. If the error is equal to or
greater than the proportional band setting, the fire
rate will be 100%. Defaults are 70°F (Boiler), 8°F
(Water Heater)
Integral Gain 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 2.00 (Defaults are 1.00 for Boilers, 1.60
for Water Heaters).
Derivative Time This value (0.00 to 2.00 min.) responds to the rate of
change of the setpoint error. This is the time that
this action advances the output. (Defaults are 0.0
min. for Boilers, 0.10 min. for Water Heaters)
Min Load Adj
(If Unit Type = Water Heater) 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 flow
levels.
Max Load Adj
(If Unit Type = Water Heater) 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.
FFWD Temp
(If Unit Type = Water Heater) Displays the Feed-Forward temperature.
Outlet Feedback Used to Enable or Disable feedback. Disable this
function for Feed-Forward control only.
Feedback Gain
(If Unit Type = Water Heater) Adjustable from 0.01 to 1.00 (Default is 0.05).
Breakpoint at 100%
Thru
Breakpoint at 0%
(If Unit Type = Water Heater) Allows breakpoint temperature settings to be entered
for 100% to 0% in 10% increments. The Bkpt Dsp
options in the Calibration Menu must be enabled to
view breakpoint temperatures. See Table 2-4 for
breakpoint default values.
Reset Defaults? Resets Tuning Menu options to Factory Defaults
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