Technical Drawing

BURNHAM COMMERCIAL 27 February 2008
MPC Multiple Pass Commercial Boiler – Suggested Specifications
Heating, Ventilating and Air Conditioning
15500-8
boiler supply water to blend with the return water. When the return water temperature returns to an
acceptable range, the boiler supply valve shall slowly jog open.
J Communication
Include an RS485 modbus slave or peer-to-peer communications data highway on each boiler control
system. When peer-to-peer communication is enabled the data highway shall allow the connected
boilers to exchange signals as required to provide coordinated fully modulating lead/lag functions. It
shall not be required to wire individual control signals between boilers. When modbus communica-
tion is enabled the data highway shall allow individual boiler limits, lockout, boiler and system tem-
peratures and firing rate status to be readable and water setpoint, boiler firing rate, and start/stop
command to be readable and writable. Provide all equipment capabilities specified in this paragraph,
even if a connecting SCADA (Supervisory Control And Data Acquisition system, typically a desk
top personal computer) system is not included in this project.
K Quality Assurance
The boiler control system shall be supplied as part of a factory assembled, tested burner control cabi-
net.