United Arab Emirates, Dubai in special, is where large size construction projects are ongoing at fast pace compared to any other parts of the world. When HVAC projects grow in size and complexity, execution becomes just as important as design. HVAC installation does not begin when a construction is complete, rather is a part of the construction from design till completion stage. HVAC Contractors are involved in offering complete support from engineering and drawings to installation, testing, and commissioning. HVAC Engineers work in coordination with MEP Contractors and MEP Engineers to align HVAC installation works in line with the project requirements.
- In today’s complex construction environment, successful HVAC installation requires more than just equipment supply and site execution. It demands precise engineering, seamless coordination, strict compliance with standards, and expert commissioning.
- Handling of large scale project requires extensive experience in HVAC installation, VRV/VRF systems, ducting, copper pipe installation, and Ventilation systems.
From Proposal Approval to HVAC Drawings
Once an HVAC project proposal is approved, one of the core and highly important work is to kick start the HVAC drawings using the existing design drawings provided by the contractor and consultant. This is done in coordination with the main contractor and MEP contractor. The first priority is collecting architectural and MEP drawings so we can start preparing:
- HVAC drawings
- Ventilation drawings
- Coordination drawings
These drawings are carefully developed to suit site conditions and are submitted to the consultant for approval. If any revisions or design changes are required, HVAC engineers work closely together to update and resubmit the drawings until approvals are secured.
In this process, regular meetings and discussions are conducted with Plumbing, Electrical, Fire and Safety and Civil Engineers. It is to be ensured that the Coordination drawings are ready before the team can be deployed.
Material Submittals and Supplier Coordination
In parallel to the HVAC drawing and coordination, the procurement team is briefed about the project as well as the specifications of all the materials required. They start reviewing the documents and project timeline to better understand the deliverables and availability. List of suppliers are prepared for different materials based on the specifications. The critical items in HVAC installation projects include:
- HVAC Units (DX, VRV/VRF)
- Ducts – Flexible Ducts and Rigid Ducts
- Copper Pipes
- Plenum Boxes
After drawing approvals, the focus shifts to materials. Based on the material specifications received from the main contractor, suppliers are shortlisted.
Each supplier is approached for:
- Technical submittals
- Product data sheets
- Images and compliance documents
All submittals are properly documented and submitted to the consultant for approval. Any variation in material specifications or submittals is reviewed and reworked by our engineering team to ensure full compliance before execution begins.
HVAC Unit Selection – DX, VRV, and VRF Systems
This process happens during the proposal stage, where the brand and unit type is determined. The final models of the units, their tonnage, and other requirements are finalised based on the approved coordination drawing.
Choosing the right HVAC unit is critical for system performance and long-term reliability.
For large size projects, the options are:
- DX Units
- VRV or VRF Units; or
- Chiller Units
As an authorized DAIKIN service provider, we strongly support and install DAIKIN VRV systems, known for their energy efficiency, durability, and advanced control features.
Based on the agreement, HVAC contractor is responsible for:
- HVAC unit purchases
- Material procurement
- Site delivery coordination
Why Chose DAIKIN?
Daikin has been an industry leader for decades, known for its technological innovation, energy efficiency, and durability. Daikin air conditioners stand out due to several key advantages:
- Energy Efficiency: Daikin systems are designed to minimise energy consumption without sacrificing performance. This is crucial, especially in UAE’s climate, where air conditioners are often used for extended periods during summer.
- Quiet Operation: One of the standout features of Daikin units is how quietly they operate. Whether you’re using a split system or a ducted air conditioning system, Daikin ensures you won’t be disturbed by noise, making their units perfect for bedrooms or quiet office spaces.
- Reliability and Durability: Daikin air conditioners are known for their long lifespan, provided they are well maintained. These systems are built to endure heavy use, making them a cost-effective choice in the long run.
- Environmentally Friendly: Daikin is committed to reducing its environmental impact. Many of their systems use R-32 refrigerant, which has a lower global warming potential than older refrigerants. This aligns with a growing need to choose more eco-friendly options in our homes and businesses.
On-Site HVAC Installation Works
This is where the real work starts and team is mobilized. Once drawings (shop drawings and coordination drawings) and material submittals are approved, a detailed project plan is prepared in coordination with the main contractor, MEP Contractor and other Engineers.
Based on the project plan, the procurement team starts ordering for materials with the approved suppliers. Wherever required, the tag lists are prepared by draftsman in coordination with Project and Site Engineers. Orders are done based on the delivery schedule ensuring there is no delay in completing the works.
Typically, installation teams are divided into three specialized groups:
- Ducting installation team
- Copper pipe installation team
- Ventilation duct installation team
Each team is assigned specific areas to maintain progress and quality across the site.
Coordination with Other MEP Services
At every stage of the project, Project Engineer, Site Engineer and Supervisors are required to closely coordinate with other contractors on the site. HVAC installation is never isolated work. Continuous coordination is maintained with:
- Plumbing teams
- Electrical teams
- Fire & safety teams
This ensures that ducting, copper piping, and ventilation installations are clash-free and aligned with other services. Regular updates are shared with the MEP contractor and main contractor to avoid variations and delays.
Quality Control, MIRs, and Inspections
• Certification of Tools: It is important to observe that all the tools used for HVAC installation has ECAS/EQM marks and are certified by government approved organizations.
- Quality Control: Quality control is maintained at every stage of the project.
- MIR (Material Inspection Reports) are obtained for all materials delivered to site
- IR (Inspection Reports) are prepared before any work is concealed or closed
- Pressure Testing: This step is crucial to ensure there are no leaks in the refrigerant lines.
- Nitrogen Pressurization: The system is pressurized with dry nitrogen to a high pressure (typically up to 550 PSIG).
- Holding Period: The pressure must be held for 24 hours to monitor for any drops, which would indicate a leak.
- Leak Detection: If the pressure drops, the leak is located, repaired, and the pressure test is repeated.
- Inspection by Supplier: Based on the supplier of the units, they are invited to do regular inspections of unit installations and copper pipe works.
Testing and Commissioning
After installation works are completed, with the support of the unit supplier, various processes are carried out in multiple stages.
- System Flushing and Cleaning: Before sealing the system, the refrigerant piping is flushed to remove any dust, impurities, or moisture introduced during installation. Nitrogen is often used to blow through the lines to ensure they are clean.
- Vacuum Drying: Once the system is proven to be leak-free, a vacuum pump is used to remove all air and moisture from the pipes.
- Triple Evacuation: A “triple evacuation” method is highly recommended, involving breaking the vacuum with nitrogen to remove moisture, ensuring the system reaches a deep vacuum of 500 microns or less.
- Moisture Removal: Proper vacuuming is critical because moisture can cause severe damage to the compressor (creating acid in the PVE oil).
- Refrigerant Charging
- Calculation: The required amount of additional refrigerant is calculated based on the precise length and diameter of the liquid pipes.
- Charging: The refrigerant is added to the system in liquid form (using a charging cylinder or weighing scale).
- Final Electrical and Control Wiring Check
- Inspection: All communication cables (typically non-polar shielded) and power connections are checked for tightness and proper connection.
- Address Setting: Unique addresses are configured for each indoor unit, and communication with the outdoor unit is verified.
- Commissioning (Startup and Test Run) – unit wise, area wise and system performance.
- o Power-Up: The system is powered up, often allowing the crankcase heater to warm the oil for 6–12 hours before starting.
- o Test Run: The system is operated in both cooling and heating modes, and all functional parameters are checked.
- o Validation: The technician verifies that the system is operating within the manufacturer’s specified parameters (e.g., superheat/subcooling values).
- Documentation and Handover: A commissioning report is filled out, documenting the installation, test results, and any additional refrigerant charge. The customer is instructed on how to operate the system, including using the controllers, and receives the operation manuals.
All required approvals are obtained from consultants and concerned parties before project handover.
Defect Liability Period (DLP) Support
Based on the project agreement, a Defect Liability Period (DLP) is defined, usually 12 months from the handover period. During this period, it is the responsibility of the HVAC Contractor to support the project by addressing any issues and ensuring smooth HVAC system operation.
Projects We Handle
Vision Air Technical Services HVAC installation services cover:
- Towers and high-rise buildings
- Warehouses and industrial facilities
- Villas and residential buildings
- Individual apartments
With experience in HVAC projects of varying scale, Vision Air ensures consistent quality regardless of project size.
Why Vision Air for HVAC Installation Projects?
- End-to-end HVAC installation solutions
- Strong expertise in VRV and VRF units
- Authorized DAIKIN service provider
- Dedicated teams for ducting and copper pipe installation
- Proven coordination with MEP and main contractors
Conclusion
Whether it is a high-rise tower, warehouse, villa, or apartment, Vision Air Technical Services LLC delivers dependable and technically sound HVAC solutions tailored to project requirements. With a strong focus on engineering precision, quality execution, and seamless coordination, Vision Air continues to be a trusted partner for HVAC projects in the UAE. For professional HVAC installation services and expert support in VRV, VRF, ducting, and copper piping systems, contact us.
