DESIGN & CONSTRUCTION

1.1. Preparation :
– Based on technical documents (explanation of requirements and detailed drawings), the construction technical department sets up the implementation schedule.
– Prepare detailed estimates to request the supply of equipment and materials and send them to the materials department for timely approval according to schedule.
– Before importing materials for manufacturing, you must report to the technical department and monitor the quality of materials that meet the correct and complete criteria before entering the factory for manufacturing.
– During the production process, items that require specifications must be continuously monitored and products and details checked at the end of the day.

1.2. Requirements for technical rooms:
– Carefully study the technical drawings and requirements of the investor, propose the most popular construction methods and steps in advance and receive feedback from the construction department and materials department to make adjustments (if any). .
– Redraw in detail the standards that need to be constructed correctly and ensure technical standards if the bid drawings are not clear.
– Regularly monitor and check techniques and progress throughout the construction process, promptly adjust when there are errors due to confusion or inappropriateness during the construction process.
– Static acceptance and inspection of finished products before pressure testing or coating.

1.3. Requirements of the material supply department:
– Carefully study the main technical specifications of the required materials before requesting approval to supply.
– Carefully and fully record the parameters and origin before handing over and putting into construction.
– Regularly update equipment and supplies on price changes from manufacturers and domestic supply capabilities to promptly report any changes.
– Check weekly inventory for small parts that are easy to transport and calculate volume when importing, exporting or handing over a full shift.

1.4. Requirements to the construction department – production teams.
– Carefully study the technical requirements, principles, details to be manufactured and assembly drawings provided by the technical department, confirm the safety of construction before signing and putting into production. (If you discover or suspect errors, you should immediately report them to the technical department and make changes).
– Plan personnel and properly arrange construction forces to ensure requirements for products responsible for processing, manufacturing and installation.
– Absolutely comply with technical requirements and labor safety throughout the construction process.
– Regularly supervise, promptly adjust irrationalities, monitor construction methods, constantly improve tools, methods and construction techniques to ensure safety, aesthetics and efficiency (regardless of Any effective employee improvement initiatives will be considered and promptly rewarded and encouraged by the company’s Board of Directors.

– Write daily work progress reports and suggestions, if any.

2.2 Industrial hygiene

The replacement and installation process follows a rolling plan, doing one area completely. During the installation process, industrial cleaning of construction areas must be regularly carried out to ensure hygiene and safety. After complete installation, calibration and test running of the entire system, conduct a general cleaning of the entire project to prepare for measurement, technology transfer and handover for acceptance.
Check and measure parameters of the entire system, guide technology transfer and conduct overall acceptance of the project.
Procedures carried out before starting construction
– Receive site handover, agree on work implementation plan with the Project Management Board.
– Prepare warehouse of materials, construction equipment and security work.
– Open project diary.
– Gather officials and workers participating in construction to disseminate construction plans and learn labor safety and construction site regulations.
– Gather materials according to plan for work items.
– Deploy construction work.
The installation of the air conditioning system complies with current domestic construction and air conditioning system installation standards and other relevant construction standards. All installation and construction work must be based on detailed construction design drawings determined on site and approved by the Construction Management Board. Specific implementation measures are as follows:

3. Construction plan for air conditioning installation

Work order
3.1. Assemble equipment before transport:
– Check the condition of the machine and accompanying supplies (copper pipes, condensate pipes, electrical wiring, documents, warranty papers, instructions for use…) before receiving the machine and moving it to the delivery area. goods from the equipment supplier.
– When the equipment is gathered at the construction site and has been inspected and inspected to confirm the conformity of the goods with the contract of the Inviting Party, then construction steps can be carried out. Before putting new equipment into installation, you must carefully check the basic functions to ensure that the equipment works before being installed.
3.2 Move the machine to the construction area
After being inspected by the bidding party, the equipment will be transported to each specific installation location according to the bidding party’s request by specialized means of transportation. When moving equipment to areas that are difficult to move, if necessary, we can disassemble the machine clusters and assembled details to move and assemble to the construction area.
3.3 Technical measures for construction work
Taking impressions and processing details, Determining the location of the gas pipeline for the air conditioning system to take impressions, determining the exact location of the details to be assembled, the axis position of the pipe sections based on the on design drawings and actual structure of the project. After having the location of the pipes or equipment, combined with the detailed construction design drawings, we proceed to draw the route and record the dimensions of the equipment, gas pipes, etc., mark the branching points, elbows…, locations where racks, hangers, etc. need to be installed so that the installation work can be carried out as quickly as possible, with the least impact on the operation of the project.
The racks and brackets are linked to the construction structure by means of plates, screws, washers and threaded mounting rods. All gas piping systems, brackets, and bolt holes have been machined. pre-drilled and welded at the production site before being brought to the construction site. The distance between the mounting brackets and the brackets complies with the actual technical requirements on the basis of SMACNA standards. All hangers and racks must be anti-rust and painted before installation.

3.4 Install air conditioning equipment
a. Installation and running of gas pipelines and accessories
The construction sequence follows the rolling method and is carried out as follows:
– Install hangers and brackets for gas pipes and accessories. All mounting brackets are assembled into the building structure with bolts and screws.
– Completely align the pipeline (adjust the brackets, check the tightness of the gas pipes, increase insulation at the connection points…).
– Check and complete the entire gas pipeline system.
– Crane the heaters to the locations where they need to be installed.
– Install the heating system at pre-positioned locations, making the machine base ready.
– Install the refrigeration units in the locations where the racks have been hung according to the construction drawings.
– Connect gas pipes to the cooling and heating units according to technical requirements.
– Align and install anti-vibration rubber pads for the air conditioning system.
– Align and balance the device by leveling and tighten or loosen the device foot bolts. Ensure standard accuracy <1/1000.
– Connect to ground, then connect 3-phase power to the machine and determine the correct direction of rotation.
b. Processing and installation of condensate water pipes
Construction sequence is as follows:
– Processing hangers and brackets after taking impressions.
–  Install hangers and racks.
– Install PVC pipes (pay attention to leveling to create a minimum slope of 1/100 for horizontal pipes) to discharge condensate and accompanying accessories (cones, elbows, rods…). Arrange a number of places to install the exhaust pipes on the ceiling covered with anti-insect nets.
– At the locations of the main condensate drainage axis, arrange siphons to avoid toxic vapors and polluted gases from below following the pipes into the rooms.
– Conduct a tight test after installation is complete (clean the tube before testing). Connect pipes to condensate trays.
– Complete filling and plastering construction holes.

3.5 Install air channel system equipment
The construction sequence follows the rolling method and is carried out as follows:
– Install hangers and brackets for air ducts and accessories. All mounting brackets are assembled into the building structure with bolts and screws.
– Install air ducts with or without insulation at the determined installation location in accordance with the construction drawing requirements and accompanying accessories (cones, elbows, tees…).
– Completely align the pipeline (adjust the brackets, check the tightness of the pipes, increase insulation at the connection points…).
– Check and complete the entire pipeline system.
– Install exhaust and supply air fan systems at locations where installation is required.
– Install surrounding accessory systems in positions according to the construction drawings.
– Connect air ducts to fan systems according to technical requirements.
– Conduct a tight test after installation is complete.
– Complete filling and plastering construction holes.
3.6. Electrical installations
Technical acceptance of completing the wiring before connecting to the electrical cabinet, equipment, and controllers.
The electricity installed in the electrical cabinet consists of two main parts: the electrodynamic system for the air conditioning unit and the control electrical system connected to the central control equipment. Construction sequence is as follows:
– The main part of the electrical cabinet will be installed, measured and checked at the factory. Connecting wire ends must be crimped, specifically numbered and have detailed installation drawings. The main electrical cabinet must be coordinated with the Management Board to install at a reasonable time before installing air conditioners. – Construction and installation of cable trays and wire support trays after measuring and taking marks.
– Carry out power cabling from the cabinet to the equipment.
– Check the voltage parameters supplied to the equipment system.
-Re-inspect the entire system (air ducts, electrodynamic system…) in a state where the equipment is ready to operate and put into acceptance and handover.
Note: All match points will be played firmly with a match ball and using numbered pins. Only when the entire inspection is complete are you allowed to connect power to the circuit breaker.

4. Commissioning, acceptance and handover to use