Although many renovation projects require removal and decommissioning of building automation and process controls, it is rare for demolition drawings to indicate what must be demoed on control systems and what is to remain. Physical removal of instruments and control wiring, however, is just part of the total picture. Field items must be removed from the front end graphics, sequence of operation, and logic, as well. This holds especially true on commissioned and qualified systems.
After decommissioning and demolition is performed, it may also be necessary to re-commission the system or systems. Many large renovation projects require a significant amount of building automation and controls removal, replacement, and/or additions. Technicians must analyze the total system, from field wiring and devices to the front end, to ensure that the modified system performs to design intent. Device calibration should be checked as well.
Owners, engineers, and contractors should always take a holistic approach when performing renovations to control systems. It is always good practice to sit down during the planning stage to review the entire system and scope of work, and to do a walk-down of the system to assess the age and condition of existing equipment. This helps to avoid misunderstandings, finger-pointing, and unnecessary costs later in the project.
About Omni
Omni Instrumentation & Electrical Services, Inc., located in New Jersey and Maryland, is a premier instrumentation and electrical contractor, providing superior total care solutions since 1986. Services include instrument installation, tubing installation, instrument calibration, control loop testing, startup and commissioning, power and lighting, process control wiring, BMS wiring, telecommunications and data wiring, fire alarm wiring, security wiring, process network wiring, and control panel fabrication. Omni Instrumentation & Electrical Services, Inc., is certified in Foundation Fieldbus, Profibus, DeviceNet and ASI-Bus installation.