What is BS 7074-3 – Code of practice for chilled and condenser systems about? 
Chilling systems are a type of system that sends wind to the heat exchanger and cools the refrigerant with air. Meanwhile, condenser system works almost the same way as air-cooled chillers. The difference is that they remove heat from chilled water by exhausting the heat to a second, isolated water line called the condenser water line.
BS 7074 is a European Standard series that discusses application, selection and installation of expansion vessels and ancillary equipment for sealed water systems. The objective of BS 7074 is to ensure expansion vessels and ancillary equipment used in sealed water systems are fit for purpose.
BS 7074-3 is the third part of the BS 7074 series that provides code of practice for application, selection and installation of chilled and condenser systems.
BS 7074-3 gives recommendations on the application of expansion vessels complying with BS 4814 having a maximum pressure of 7 bar2) for use in the following two types of system. It includes description, design considerations and application.
Who is BS 7074-3 - Code of practice for chilled and condenser systems for?  
BS 7074-3 on code of practice for chilled and condenser systems is relevant to: 
- Manufacturers of components of expansion vessels and ancillary equipment for sealed water systems
- Entities involved in the testing, commissioning and maintenance of chilled and condenser systems
- Product designers
- Engineers
- Quality control authorities
- Building management authorities/owners
- Local bodies
Why should you use BS 7074-3 – Code of practice for chilled and condenser systems? 
Chilling and condenser systems are used for ventilation and air-conditioning systems for cooling building spaces.
BS 7074-3 provides best industry guidance on the applicaton, installation, testing, commissioning and maintainence of chilled and condenser systems.
BS 7074-3 descriptively discusses, design considerations, application process and ancillary equipment associated with chilled water systems and condenser water systems.
Complying with the design considerations ensures of successful and safe operation of chilled and condenser systems.
Furthemore, BS 7074-3 also provides examples of recommended procedure for the calculation of the size of expansion vessels. This further helps in improving the efficiency of the product.
Thus, compliance with BS 7074-3 can ensure the chilled and condenser systems play a positive role in the performance of sealed water systems. As a result, you can avoid incidents of cooling towers flooding at shut-off.
