Building Automation System Upgrade

In general the work consists of the replacement of aging Johnson Controls DDC (Direct Digital Control) controllers and antiquated Barber Colman DDC controllers with new DDC controllers for major HVAC equipment (air handlers, boilers, etc.) Replacement parts for these DDC controllers are becoming obsolete. Also included in the scope is replacing pneumatic damper actuators and pneumatically actuated control valves for the air handlers. Conduit, wiring and panel and field control devices will be reused were possible. While most control dampers will have the ability for reuse, the outside air dampers for several air handling units will be replaced due to their deterioration. Some minor pneumatic controls will remain because of cost and accessibility. Pneumatically actuated smoke dampers will remain and be controlled from the new DDC system. The new Schneider DDC Controls recently installed in Building N Addition will remain. A new Building Automation System front end computer workstation will be provided for Agency access to the new control system. The Guard Towers and Buildings J and L1 are not included in this scope of work as DDC controllers do not exist in those buildings.

Division 27 -	Communications, Common Work Results for Communications.
Division 28 -	Electronic Safety and Security, Common Work Results for Electronic Safety and Security.