Proportional balancing of water flow rates is established UK practice for heating and cooling applications. The requirements for proportional balancing are defined in CIBSE Comissioning Code W:1994 Water Distribution Systems. This report explains the procedures to comply with this code. The original CIBSE and BSRIA guidance on proportional balancing was derived from a basic understanding of the relationship between flow rate and heat transfer. A combination of theory and practical experience was used to develop recommendations which have generally proved successful over the years. Implementing the guidance has not been without its problems. One of the biggest obstacles to water balancing is the presence of system air, dirt and debris causing blockages at regulating valves, control devices and terminal units. These problems resulted in the production of "BSRIA Application Guide 8/91" "Pre-Commission Cleaning of Water Systems". This explained the basic methods by which water systems are probably the most stringent in Europe. In the light of these developments, it became apparent that there was a need to review established procedures with the following objectives: to establish what are the main priorities for commissioning of water systems; and to determine the most cost-effective way of achieving those priorities. This "Application Guide" is the result of this research. The advice provided is directed to design engineers and commissioning specialists, and complements previous BSRIA guides. It is hoped that this clarification of commissioning priorities should help to offset many of the technical disputes which arise over the acceptability of system operating conditions.
Number of pages: 64
Dimensions: 297 x 210 mm
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