AERCO AM Series Boiler Cascade Sequencer Controller - Manual (Page 22)

AM Series Cascade Sequencer
INSTALLATION AND OPERATION MANUAL
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.
AM Series Cascade Sequencer Parameter Descriptions
Parameter Name Parameter Description
Boiler address Logic boiler address
Cascade setpoint Cascade general sensor 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.
Page 22 of 26 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0101_0A
PRI - 11/25/14 Ph.: 800-526-0288 GF-146-CS