Precautions for purchasing HVAC equipment
The core principles of purchase are: advanced technology, reliable quality, reasonable matching, energy saving and high efficiency, and easy maintenance.
1. The heat exchanger is the core equipment of the entire heat exchange station. The type of heat exchanger should be selected according to the customer's heat exchange station heating area, heat load size, and medium type. Whether to use a plate heat exchanger or a volumetricheat exchanger.
2. The circulating water pump's head and flow rate must meet the needs of the system's most distant and highest users. The flow rate and head must be accurately calculated based on the system's design flow rate and the resistance loss of the most unfavorable loop. Excessively high head results in wasted energy and pipe noise, while too low a head results in insufficient heat at the end. Utilizing variable frequency control significantly reduces energy consumption and enables "heating on demand," a standard feature of modern energy-saving heat exchange stations.
3. Flow rate and lift of water supply pump: The flow rate is generally 4%-5% of the system's circulating water volume, and the lift must ensure that the water can be replenished to the highest point of the system with a certain margin.
4. Softening water equipment: Used to remove calcium and magnesium ions from water to prevent scaling. Pay attention to its regeneration method, resin quality, and control valve reliability.
5. Valves: Shut-off valves: Choose gate valves, ball valves, or butterfly valves with good sealing performance.
6.Regulating valves/balancing valves: Used to adjust the system's hydraulic balance, choose valves with good regulating characteristics.
Check valves: Prevent water backflow when the pump stops. Choose a type with low water resistance and a tight closing force.
7.Priority should be given to those with built-in intelligent control systems and a high degree of automation (core functions include climate compensation, frequency conversion control, sequential start and stop, fault alarm and protection, remote data transmission, and component quality).
When purchasing heat exchange station equipment, determine the type and quantity based on actual needs and regulations. To ensure the quality of the equipment, it's recommended to choose equipment with stable performance, high efficiency, low noise, and guaranteed after-sales service. Of course, in line with the principle of sustainable development, consider whether the equipment is energy-efficient and has minimal impact on the surrounding environment.
Although there are many types of heat exchange station equipment, many users can easily be dazzled by the choices. However, as long as they understand the selection principles of heat exchange station equipment, they can easily select suitable heat exchange station equipment according to their actual situation.
Key points to note when installing heating equipment
After deciding which heat exchanger equipment to purchase, you need to consider the installation of the equipment. Before installing the heat exchange station equipment, the installation baseline must be drawn according to the construction drawings and the axis, edge lines, and elevation lines of the relevant buildings (structures). Carefully check the correspondence between the direction of the primary water system's supply and return pipes and the external network to ensure the correct direction and avoid reverse connection. Before installation, it is also necessary to check the number and position of the embedded hanging points, the equipment foundation position, surface quality, geometric dimensions, elevation, and concrete quality, and conduct a joint review and inspection, and complete written inspection procedures. The installation of pipelines in the heat exchange station is carried out after the installation of the main equipment, support brackets, and civil engineering structures are completed.
When connecting pipes to equipment, the equipment must not be subjected to additional external forces, and debris entering the pipes must be promptly cleaned. After the pipes are welded, they should undergo an appearance quality inspection and non-destructive testing. If qualified, strength and tightness tests should be conducted according to the system.
In short, when purchasing and installing heat exchange station equipment, you need to consider multiple aspects comprehensively, from equipment selection to installation details, to ensure the safe and stable operation of the equipment. At the same time, you should also pay attention to the commissioning, maintenance and care of the equipment to extend the service life of the equipment and improve the heat exchange efficiency.
If you want to know more about heat exchanger units or are interested in purchasing, please send an email to 9988xiaoshuai@gmail.com, we will reply you in time after seeing the message!