New England Business Service's Peterborough, New Hampshire facility is a paper forms printing plant.
The building's major mechanical systems include:
|19 - 20 ton York Package Cooling Units with Economizers|
|1 - 40 ton Cooling Unit with Steam Reheat|
|9 - Steam Heating and Ventilating Units|
|9 - 15 tons or less Cooling Units with Steam Heat Coils|
|2 - Low Pressure Cleaver Brooks Steam Boilers|
Phase One of this project involved replacing the existing DDC system with a Delta Controls ORCA Series DDC system. The existing system was no longer manufactured and had Y2K issues. While updating the equipment, corporate and local facility management put forth a list of goals that they wanted to accomplish during the replacement. These included:
R. L. Shields Associates, Inc. installed 4 Delta Controls ORCA Series DCU Controllers to replace the existing 1980 vintage system. The DCU's were interconnected by a 1 Mb high speed network. The 19 new York cooling units are being controlled by Delta Controls Zone Controllers. They are networked together and connected to the Maintenance Department DCU.
To control ventilation requirements, Carbon Dioxide (CO2) sensors were installed in the office and production areas. As CO2 levels rise, the outside dampers modulate open to keep the CO2 readings below maximum acceptable levels. Carbon Dioxide has become an acceptable method of controlling ventilation requirements and is recognized by ASHRAE as one method of monitoring air quality.
To control building static pressures, a network of sensing ports was installed around the four sides of the building. This building has a history of running a negative static pressure. This was a concern because of drafts and blowing paper. Since the Delta Zone Controllers allowed full control over the dampers in the 19 new York units, as the static pressure starts to go negative, the dampers begin to modulate open to allow outside air to enter the building through the cooling units rather than the doors.
Some special software was developed by R. L. Shields Associates for use on this site and others.
|ROOF TOP UNIT|
For more information on this project or Delta Controls, contact:R. L. Shields Associates, Inc.
Click here to select another Case Study.
Click here to return to the Home Page.
© Copyright R. L. Shields Associates, Inc. All rights reserved.
Intelli-Sys, Intelli-Con, Intelli-Net, and Intelli-Stat are trademarks of Delta Controls, Inc.