User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
APPENDIX A – RECON MENU ITEM DESCRIPTIONS
OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 139 of 178
GF-147 Phone: [phone] PRI: 10/28/2014
Table A-4: Tuning Menu Item Descriptions
Table A-4: TUNING MENU ITEM DESCRIPTIONS
See section 3-7 for a range of choices and the default values.
MENU LEVEL & OPTION DESCRIPTION
1
Prop Band
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 8%.
2
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 10.00
3
Derivative Time
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.
4
Min Load Adj
Setting is adjustable from -50°F to +50°F. 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.
5
Max Load Adj
Setting is adjustable from -50°F to +50°F. It adjusts the output
by changing the scaling of the breakpoint chart at maximum
flow.
6
FFWD Temp Displays the Feed-Forward temperature.
7
Outlet Feedback
Used to Enable or Disable feedback. Disable this function for
Feed-Forward control only.
8
Feedback Gain Adjustable from 0.01 to 1.00 (See NOTE below)
9
Thru
19
Breakpoint at 100%
Thru
Breakpoint at 0%
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.
20
FDback Start Pos Start of Feedback Position
21
Fdback End Pos End of Feedback Position
22
Max Feedback Max Feedback
23
Fdback Value Monitor Feedback Value