AERCO BMK 6000 Dual Fuel - Manual (Page 159)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
APPENDIX A – BOILER MENU DESCRIPTIONS
OMM-0096_0B AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 159 of 219
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03/21/2014
APPENDIX A: BOILER MENU ITEM DESCRIPTIONS – Continued
MENU LEVEL & OPTION DESCRIPTION
CONFIGURATION MENU (Cont.)
Deadband High
Deadband Low
Deadband High and Deadband Low settings create an
“Outlet Temperature” Zone. In which no Valve
Position corrections will be attempted.
The Deadband ZONE is defined as operating with an
Outlet Temperature between Active Setpoint +
Deadband High and Active Setpoint – Deadband Low.
When the Outlet Temperature reaches Active Setpoint
and remains there for a period of 15 seconds, the unit
will go into a DEADBAND MODE at which point no
Valve Position corrections will be attempted while the
Outlet Temperature remains anywhere within the
Deadband ZONE. When the unit is in the DEADBAND
MODE, the °F or °C LED will flash on and off. When
the Outlet Temperature drifts out of the Deadband
ZONE, the DEADBAND MODE will be terminated and
the PID LOOP will again attempt Valve Position
corrections.
Setting range is 0 to 25. (Default is 2 for both
Deadband High and Deadband Low)
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%.
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.