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Testing and Balancing Commissioning Hong Kong

John Herbert, hong kong energy saving expert, BEAM expert
John Herbert

Testing and Commissioning a new building is a multi-stage process designed to ensure that the building handover to client is operating as intended, before substantial completion (SC), so understanding those systems is a neccessity. We help contractors, developers, and owners undertake commissioning processes that deliver higher quality buildings, compared with building without Cx process.

Test and Balance

Testing, Adjusting, and Balancing, also known as TAB, are part of the whole process often called testing and commissioning process. T&C does not start at the end of the project, different systems have procedures, that need to be carried progressively during the project, some examples might include:

After electrical and lighting first fix, the installation is inspected and continunity and insulation (mega) testing can be carried out.

After electrical motor first fix, the motor installation is inspected and windings insulation test can be carried out.

After hydraulic piping first fix, the installation is inspected and hydraulic pressure test and flushing out can be carried out.

After gas first fix, the installation is inspected and pressure test can be carried out.

After ductwork first fix the installation is inspected, and depending on the specification and pressure rating of the ductwork, pressure tests can be carried out for the medimum and high pressure systems.

After refrigeration first fix, the installation is inspected, flushed out, and nitrogen pressure test can be carried out.

In all cases, irrespective of the contractor(s) installing the systems, the results of the testing and balancing inspection, and recorded measurements are logged to form part of the commissioning report delivered to the building owner at the end of project.

Similar to the first fix, after the second fix installation is complete, the works are inpsected, tests are carried out, in preparation for the adjusting and balancing processes.

It is worth noting that some specifications require equipment to the tested by the manufacturer in the factory before the equipment is approved for transportation, for example, HVAC chillers, Air Aandling Units, refrigeration units, pressure vessels, switchboards, etc. it also known as FAT (Factory Acceptance Testing) and often witnessed by the building owner.

Testing Adjusting Balancing - commissioning valve hk

CX Process

After the basic testing is finished, and the basic components are connected and assembled into functional systems, then each system undegoes is own inspection to ensure all the necessary equipment is provided, installed, and engergized.

Each system has different measures and methods for adjustment and fine tuning, to ensure the completed package conforms with the design intent.

Completed hydaulic systems, such as chilled water, and air distribution systems require balancing before finally adjusting the system prime mover, then system intergration testing is carried out.

Systems with equipment such as pumps that provide different levels of performance shall be be measured, compared with the design intent, and where necessary adjusted to match the requirement.

Once the initial test and balance is complete, sometimes called pre-commissioning, functional tests are carried out to ensure the overall performance of system(s) achieve the design intent.

For example, after the electrical, controls, chiller plant, chilled water pumps, and air handling units are operating and adjusted, the temperature and humidity conditions in the space are measured to demonstrate that the system(s) functions correctly.

testing adjusting balance commissioning pre-commissioningAbove: Unstable room temperature recorded

What's next, if you need testing and balancing supervision for your project call us today!

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#commissioning #TAB #test #balance #commissioned #CX
date: 15-04-21
kelcroft consultants hong kong