AM Series Cascade Sequencer User Manual
OMM-0101_0D
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
23
of
28
GF-146-CS
Ph.: 800-526-0288
04/29/2016
Submenu Navigation and Parameter Settings
– Continued
4. Use the
Up
or
Down
buttons
to change the parameter value up or down.
5. When the desired value is displayed, save it by pressing the
Ok button
. To reject the
change, do not press OK, and instead skip to the next step.
6. To leave the Sub Menu and return to the Main menu, press the
Menu button
(Figure 2-1).
IMPORTANT NOTE!
After any change to a parameter, wait at least 40 seconds before exiting the sub menu or
turning the power off.
2.4 Sub-Menu Parameter Descriptions
Below is a list of Menu parameters and descriptions. The table in the next section lists the range
and default settings for each parameter.
Cascade Sequencer Parameter Descriptions
PARAMETER
DESCRIPTION
Boiler address
Boiler cascade logic address.
NOTE:
This is NOT the Modbus address.
Refer to the AM User Manual GF-146 for how to set the Modbus address.
Cascade setpoint
Cascade header setpoint
DHW ON..OFF
Enable / disable control for an indirect water heater
Start delay time
Delay for a call of the next boiler
Stop delay time
Delay to remove the call to the next boiler
Start boiler diff
Temperature differential to call the next boiler
Stop boiler diff
Temperature differential to remove the call to the next boiler
Stop all boiler
diff
Temperature differential to remove the call to all boilers
Max offset up
Maximum difference
above
the header setpoint that any one boiler is
allowed to reach.
Max offset down
Maximum difference
below
the header setpoint that any one boiler is
allowed to reach.
Rotation interval
How often the “lead” boiler is rotated.
P Value
Proportional band of the PID temperature control of the cascade general
sensor
I Value
Integral band of the PID temperature control of the cascade general sensor
D Value
Derivative band of the PID temperature control of the cascade general
sensor
Slew rate
Slew rate is a low level parameter. It determines how fast the output of a
PID can change per amount of time.
System
correction
The system correction value is added to the measured system temperature.
This corrected value is used for control. If the measured sensor value
deviates from the real temperature then you can correct it with this
parameter.
Mod delay factor
Delay to the start of modulation of any boiler.