HVAC Pre-Commissioning
HVAC pre-commissioning is the set of checks that confirms a system is fully installed, connected, clean and safe to start before functional testing begins. It is the step that stops commissioning programmes from stalling on site.
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- Admin@tabcomm-ksa.com
- Dammam Rd, Al Yarmuk, Riyadh 1325, Saudi Arabia
Most Delays Start With a System That Was Not Ready
Testing a system that is missing a damper, has a closed isolation valve or has no power is a wasted day for everyone. Pre-commissioning catches these gaps early, gives the contractor a clear list to close, and keeps the testing programme on schedule.
Pre-Commissioning Checks
- Approved shop drawings and HVAC design criteria reviewed against the installation
- Equipment installed level, supported and with maintenance clearances
- Ductwork complete, sealed and clean, with access doors and dampers in place
- Filters installed and drain pans and condensate traps correct
- Pipework flushed, pressure tested and correctly insulated, including vapour barriers on chilled water
- Valves tagged, labelled and in the right position
- Flexible connections on pumps, AHUs and FCUs correctly installed
- Fan rotation, belt tension and motor alignment confirmed
- Electrical supply and controls wiring ready for start-up
- Plant rooms clean and clear of construction debris
How We Run Pre-Commissioning
- Document review. Shop drawings, equipment schedules and specifications checked before we go to site.
- Site inspection. System by system walk down using our pre-functional checklists.
- Deficiency list. Every gap logged with photos and assigned to the responsible party.
- Readiness confirmation. Systems released for start-up and functional testing only when the checklist is complete.
What You Receive
Completed pre-functional checklists for each system · Photographic deficiency report · System readiness register showing what is cleared for testing
Recent Pre-Commissioning Work
University of Otago Christchurch Campus Redevelopment, New Zealand (HVAC pre-commissioning). Every TABCOMM commissioning and TAB project in Saudi Arabia starts with pre-commissioning.
- Frequently Asked Questions
HVAC Pre-Commissioning FAQ
Do you have any question?
1. What is the difference between pre-commissioning and commissioning?
Pre-commissioning confirms a system is installed correctly and ready to run. Commissioning then starts the system and proves it performs as designed.
2. Who carries out pre-commissioning?
The contractor prepares the system and the commissioning authority verifies it. TABCOMM inspects independently and signs off readiness system by system.
3. What is a pre-functional checklist?
It is a system specific checklist that confirms installation, connections, labelling and safety items are complete before start-up and functional testing.