Modsync Features - FULTON Vantage VTG Series Installation And Operation Manual

ModSync Features


Lead/Lag Control
The boilers are staged on and off to match the existing heat load. If additional heat is needed after the lead boiler
is energized the lag boiler is enabled. This keeps the boilers operating at lower firing rates for as long as possible,
maximizing their efficiency. All stages will be enabled before allowing the boiler to release to higher firing rates.

Outdoor Reset
The ModSync will automatically adjust the hydronic loop temperature based on the outdoor temperature
according to a user defined curve.

Setback Schedule
The hydronic loop setpoint can be configured to change based on whether the building is Occupied or Unoccupied.
This allows for the setpoint to be lowered during times when the heating requirements are reduced, such as at
night or weekends.

Multiple Setpoint Control Modes
The hydronic loop setpoint can be field selected to be controlled by the ModSync, Remote 4-20mA Signal, BMS, or
Manual Input.

Modbus Communication
The ModSync can communicate over the Modbus protocol to Building Management Systems. BACnet and
LonWorks communication are optionally available.

Alarm Status
Boiler alarm status is monitored and annunciated via an Alarm Screen, minimizing troubleshooting time
requirements

Alarm History
Alarm History screen provides Date, Time, and Fault information from previous alarm occurrences.

BMS System Interface
Remote Enable/Disable contacts and Domestic Hot Water priority digital inputs provide standard BMS interface
capabilities.

Firing Rate Tuning
Boiler firing rate will automatically be adjusted to prevent high limit faults in variable flow applications.

Auto/Manual Mode Control
The ModSync can be configured for automatic or manual control of the boilers. The Manual features help to
decrease the boiler commissioning time by assisting with verification of the communication interface.
Questions? Call (315) 298-8510, or visit us online at www.fulton.com
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