PC Program Instructions
6Parameters
Cascade
Each burner control in the Cascade must be given a unique address. This address can be changed by accessing parameter 4CC. The Leader (top) burner (to which the thermostat/zone control, system sensor, and system pump (if controlled by the boiler) are connected) must be set to address 0. All the Member burners must be given an address from 1 to 15. The range of this parameter is 0 to 15. The default value is
Master controlled through ModBus (Demand conf)
If the boiler or cascade is to operate based on its own inputs, this must be set to No. The boiler can still be monitored through ModBus with this parameter set to No. If the boiler or cascade is to receive commands from ModBus, then this must be set to Yes. The default setting is No.
Reload short time ModBus out of order
When the boiler or cascade is receiving commands from ModBus, but using its own system supply and tank sensor readings, the commands must be refreshed at least every 4 minutes by the building automation system. This is a fixed timeout. If the boiler or cascade is receiving either the system supply temperature or the tank temperature reading from the building automation system, that information should be refreshed more often. This parameter determines how often this refresh must occur before the boiler or cascade goes into its
On the tabs at the top of the window, click on the tab labeled 4D Pump Delay to set the delay time for the boiler, system, and HW pumps (see FIG.
Figure 6-8 Parameter Set 4D
16 
SH pump delay after SH demand (Boiler Pump D)
This feature sets the length of time the boiler pump will run after a SH demand has been satisfied. This parameter is adjustable by accessing parameter 4DA. The time range for this parameter is 0 minutes to 40 minutes. The default time is 30 seconds.
HW pump delay (HW Pump D)
This feature sets the length of time that the HW pump (if connected) will run after a HW demand has been satisfied. This parameter is adjustable by accessing parameter 4DB. The time range for this parameter is 0 minutes to 40 minutes. The default time is 30 seconds.
System pump delay (Sys Pump D)
This feature sets the length of time the system pump (if connected) will run after a SH demand has been satisfied. This parameter is adjustable by accessing parameter 4DC. The time range for this parameter is 0 minutes to 40 minutes. The default time is 30 seconds.
To set the parameters for Service Notification, click on the tab labeled 4E Notify Setup (see FIG.
Sys Pump (Sys Pump mode)
The system pump can be set to operate different ways. The operating mode can be adjusted by accessing parameter 4DG. When set to 0, the system pump will run continuously. When set to 1, the system pump output will not activate. When set to 2, the system pump will turn on and off based on the space heating call for heat. The system pump will always turn off when the Outdoor Air Shutdown feature is active. The system pump will always turn on when the freeze protection feature is active. The default setting is 2.
