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8.D.4.a Cascade Parameters
To navigate to the Cascade Parameters Screen, touch the Cascade Icon on the Configuration Screen, then touch the
Cascade Parameters Icon.
The Cascade Parameters Screen allows adjustment of the following parameters:
• Address – When manually addressing each boiler for cascade operations, this parameter is used to set the local boiler
address. Each boiler must have a unique address. A boiler with a value of 1 is the lead boiler. Lag boilers use values
2 through 8. When automatically addressing each boiler, set the lead boiler to a value of 1. With a value of 1, the
Cascade Auto-Config button is available to use, refer to this parameter below for instructions for automatic addressing
the lag boilers.
• Dynamic Address – This reflects the address of the local boiler after it has been manually or automatically addressed.
After a boiler has been manually/automatically addressed, setting this parameter to 0 will remove the boiler from
cascade operations.
• Lead Settings – This button is only selectable when configured as the lead boiler. When configured as the lead boiler,
touching this button navigates to the Lead boiler settings.
• Lost Lead Backup Setpoint – When configured for Cascade Redundancy - Boiler Internal Set Point, this parameter
is the maximum outlet temperature the local boiler is allowed to supply the system.
• Lag On Hysteresis - The value below the Max Lag Temp (Max Lag Temp – Lag On Hysteresis) that the boiler will turn
on to satisfy an active cascade demand based on the local boiler outlet water temperature. Max Lag Temp is set at the
Lead boiler.
• Lag Off Hysteresis - The value above the Max Lag Temp (Max Lag Temp + Lag Off Hysteresis) that the boiler will turn
off when satisfying an active cascade heat demand based on the local boiler outlet water temperature. Max Lag
Temp is set at the Lead boiler.
• Cascade Auto-Config – This is only adjustable at the lead boiler. Once configured as the lead boiler, pressing this
button will initiate the lead boiler to find and address all lag boilers automatically.
• Cascade Release Demand
cascade heat demand, pressing this button will remove the heat demand.
NOTE: This only applies when configured for cascade - Boiler Internal Set Point Control.
• Max Lag Temp – The maximum outlet temperature each unit is allowed to supply the system.
NOTE: All boilers must be wired for cascade operations prior to
performing Cascade Auto-Config.
C O N F I G U R A T I O N
FT
communications with the master is lost and the lag units continue to satisfy the
- When
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