HAWK ? LEAD/LAG FOR UP TO EIGHT BOILERS SYSTEM0 pages
HAWK MASTER PANEL
Lead/Lag for Up to Eight Boilers System
HAWK — LEAD/LAG FOR UP TO
EIGHT BOILERS SYSTEM
Provides Lead/Lag control for up to eight boilers when used in conjunction with the
HAWK integrated boiler control system.
FEATURES AND BENEFITS
Controls Header Pressure and Temperature:
•
Maintains steam pressure or hot water supply temperature based on system load
demand.
•
Compensates for varying losses between boiler and header.
Benefits:
•
Maximizes system efficiency.
•
Reduces cycling and boiler wear, thereby reducing maintenance and downtime
costs.
•
System shall be provided with a sequence to automatically rotate sequence in
which the boilers are fired. Rotation shall be based on the elapsed time.
•
Optimizes fuel savings.
Lead/Lag Start with Lead/Lag Modulation:
•
Lead boiler operates at full capacity prior to starting lag boiler #1.
•
Lag boiler #1 starts when the lead boiler’s firing rate is close to the maximum.
Operator can select this parameter via HMI.
•
Lag boiler #1 starts modulation when the lead boiler reaches the maximum firing
rate position.
•
Subsequent lag boilers operate in the same fashion.
•
Ideal for steam boilers.
Lead/Lag Start with Unison Modulation:
•
Lead boiler operates at full capacity prior to starting the lag boiler.
•
All boilers operate at the same firing rate as the lead boiler.
•
Ideal for Hot Water boiler systems.
Section D-1
Rev. 09-09