Central air conditioning is far from just a device for temperature regulation in medium-sized industrial workshops. It is a critical production support system that directly impacts production stability, equipment lifespan, employee efficiency, and operational costs.

I. Preparations and Plan Design

Site Inspection and Requirement Analysis

Structural Assessment: Precise Measurement of Workshop Area and Floor Height (Recommended not less than)4 meters in length), the load-bearing structure, and the determined indoor unit installation location and outdoor unit foundation platform.

Load Calculation: A comprehensive consideration of factors such as equipment heat generation, personnel density, process requirements, and solar radiation to accurately calculate cooling and heating loads.

Special Environment Considerations: Select equipment with corresponding protection levels for workshop environments with dust, humidity, corrosive gases, etc.

2Design proposal development

System Selection: Choose water system or refrigerant system based on the workshop layout; multi-split systems are suitable for scenarios requiring zonal control.

Pipe Planning: Design the routing of refrigerant pipes, condensate drain pipes, ducts, and electrical lines, ensuring no conflicts with production equipment, forklifts, or fire hoses.

Coordinated Review: Organize technical reviews of drawings for air conditioning, electrical, water supply, fire protection, and process equipment, ensuring that there is no conflict among different professional pipelines.

Section II: Equipment Selection and Material Preparation

Key Equipment Selection Points

Chassis Configuration: External power rating vs. total internal power rating"Over-configuration rate" should be kept at ≤130% to avoid overloading operations.

Terminal Equipment: Select the appropriate air outlet type based on the workshop height; high-ceiling spaces may use jet outlets or swirl outlets.

Control Systems: Equipped with an intelligent control system for zonal and time-based control, reducing energy consumption.

2Material Preparation Standards

Tubing: Choose phosphorus-free, seamless copper tubes with even wall thickness and no sand holes, and ensure proper sealing protection.

Insulation Materials: Utilizing Thickness≥20mm of luxurious thermal insulation, ensuring seamless wrapping

Bracket Hangers: Zinc-plated brackets used, spacing complies with standards (horizontal copper tube bracket spacing)≤1.5m）

Phase Three: Construction and Installation

1. Indoor unit installation

Installation Location: Keep away from heat sources and dust sources; maintain at least10cm Distance to Avoid Resonance

Level Calibration: Utilizing threaded suspension rods for hoisting, ensuring horizontal accuracyWithin ±1° to prevent condensate overflow

Dust Protection: Wrap with the original packaging plastic bag after installation to prevent dust from construction entering.

2Chiller tube routing construction

Welding Technique: Filling nitrogen to protect during welding, preventing carbon buildup on the inner wall; High-pressure nitrogen blowing after welding

Pipe fitting installation: Maintain horizontal or vertical alignment, no tilting, and use double nuts to securely tighten the joints.

Airtightness Test: Pressure retention test conducted after pipeline connectionsSystem pressure test at 4.0 MPa, pressure held for 24 hours.

3Wastewater system installation

Grade Requirement: Supervisor Drainage Slope≥1%, ensure condensate is smoothly discharged

Water-saving trap installation: High static pressure models must be equipped with a water-saving trap to prevent drainage from being blocked due to negative pressure.

Trial Testing: Conduct full water test after drainage pipe completion (fill with water and maintain)24-hour test and water test

4Electrical wiring installation

Dedicated Power Lines: Independent power lines are configured according to the main engine power to prevent sharing with other equipment.

Pipe Protection: Wire ThroughPVC or metal conduit, maintain a distance of more than 30 cm from copper piping.

Grounding Reliability: All metal enclosures must be reliably grounded, grounding resistance≤4Ω

5Duct installation (such as using a water system)

Duct Fabrication: Galvanized steel plate or composite ducts, thickness in compliance with standards

Insulation Treatment: The ductwork is insulated with rubber-foam insulation material, and the seams are bonded with special adhesive.

Airflow Balance: Set the regulating valve to ensure airflow discrepancies at various air outlets are minimized.≤10%

IV. Key Points to Consider and Pitfalls to Avoid

1. Avoiding Pitfalls Before Installation

Insufficient Ceiling Height: Workshop ceiling height is belowAt 4 meters, it is recommended to use a local suspended ceiling or wall-mounted indoor unit.

Load Confirmation: Verify the load-bearing capacity of the roof or exterior walls, and the foundation for the outdoor unit≥ 1.5 times the weight of the equipment

Bolt Holes in Beams: Must Avoid Main Reinforcement, Leave Clearance Below Beam≥50mm space

2. Avoiding pitfalls during construction

Material Authenticity: Inspect brand markings on copper tubes, thermal insulation, and other products; refuse the recycling material

Welding Quality: Requires construction workers to hold a welder's certificate, welding points100% Non-Destructive Inspection

Insulation Integrity: Focus on inspecting valves, flanges, and other areas to prevent cold bridges from forming

3. Avoiding Pitfalls During Inspection

Written Record: All test data must be signed off by both parties to avoid verbal commitments.

Hidden Work: Photography and Documentation Required for Insulation and Welding Projects

Warranty Terms: Clearly define the warranty period (recommended for the entire unit)≥2 years, Compressors ≥3 years