Acceptance testing must be tailored for each specific design, job site, and climatic conditions. While the steps for conducting each test remain consistent, the application of the tests to a particular site may vary. The following section discusses some of the known issues that occur when the acceptance tests are applied to a project.
Internal control delays
Be aware of the potential for delays programmed into many control sequences. The purpose of delays is to prevent the system from controlling too rapidly and becoming unstable. With delays between 5 to 30 minutes, the acceptance testing can be prolonged considerably.
Initial conditions
Each test instructs the contractor to return the systems to normal operating condition based on the initial schedules, setpoints, and control parameters. These should be recorded prior to initiating the testing process.
Obtain correct control sequences before testing
It is essential to know exactly how the control sequences are programmed before testing begins. Otherwise, the contractor will not be able to customize the test to the particular systems or verify that the systems work as intended. Written control sequences often do not include enough detail to test the system against, or they are found to be incorrect. Testing based on incorrect sequences will not necessarily yield a valid result. 'In 'addition, to be successful, the contractor will need to know how to manipulate the control system.
Estimated Time to Complete
To give the full picture to contractors, the At-A-Glance includes the time to complete construction observation as well as functional testing. 'In addition, the At-A-Glance indicates the time shown is per system (not per building).