Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
APPENDIX A – BOILER MENU ITEM DESCRIPTIONS
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AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0082_0J
05/21/2014
Ph.: 800-526-0288
GF-130
APPENDIX A: BOILER MENU ITEM DESCRIPTIONS – Continued
TUNING MENU
DESCRIPTION
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%.
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
1.00 (Default is 1.0).
Derivative Time
This value (0.0 to 2.0 min.) responds to the rate of
change of the setpoint error. This is the time that this
action advances the output.
WARMUP
The feature embodied in the next three menu items
eliminates Temperature Overshoots during the “Warmup”
period of a cold ignition cycle on all boilers by temporarily
modifying the PID Gain parameter during warmup and
for a period defined in the Tuning Menu.
Warmup Prop Band
Range = 1-120
Default = 95
Warmup Int Gain
Range = 1-200
Default = 50
Warmup PID Timer
Range = 1-240
Default = 20
Reset Defaults?
Allows Tuning Menu options to be reset to their Factory
Default values.
