Installation / Operation Instruction Manual

Table Of Contents
Page 75
8.D.4.a.1 Cascade CH Lead Settings
To navigate to the Cascade CH Lead Conguration Screen, touch the Cascade Icon on the Conguration Screen,
then touch the Cascade CH Icon on the Cascade Conguration Screen, and then touch the Lead Settings Icon on the
Lead unit.
The Cascade CH Lead Conguration Screen allows adjustment of the following parameters:
Set Point – This is the temperature the cascade heat demand is trying to satisfy.
Proportional Gain – This value is the corrective action that is proportional to the error (Set Point – Control
Temperature).
Integral Time – This value is applied to the sum of the error over a period of time.
Derivative Time – This value is applied to the rate of change of the error.
•O󰀨Hysteresis– The temperature above the set point (Set Point + O󰀨 Hysteresis) at which the controller will stop
calculating the PID output and set the PID output to 0 to turn o󰀨 all stages.
On Hysteresis – The temperature below the set point (Set Point – On Hysteresis) at which the control begins
calculating the PID output to turn on stages.
Max Lag Temp – The maximum outlet temperature a Lag unit is allowed to supply the system.
Base / Drop Load – This button will get you to the Base / Drop Load screen which allows you to manually enter
the base ring percentage of the next cascading boiler as well as the ring point at which this boiler will drop the
remaining load to the next cascaded boiler.
CONFIGURATION