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System Status Screen
The System Status screen is the primary ModSync screen. This screen displays the current temperature status of
the hydronic loop, the outdoor temperature, loop setpoint, control variable value, and boiler status.
Figure 5 – System Status Screen
Outdoor Temperature:
May be read using either an RTD or BMS input. Used in monitoring the
outdoor air temperature cutoff and setpoint curves.
Supply Temperature:
May be read using either an RTD or BMS input, also known as loop
temperature
Supply Setpoint:
Desired temperature for the boilers to maintain in the system;
determined using one of the selected setpoint modes at the ModSync.
Control Variable:
Output percentage indicating the current system heating requirements. *
* Control Variable is an indication of how much of the total boiler plant is required for the system to get up to
setpoint (0% = minimum or no boilers required, 100% = all boilers required at high fire). The rate of
increase/decrease of the control variable is determined by the supply temperature as compared to the setpoint
and the PID settings.
Hydronic “Boiler Config” Configuration Screens