How important is it to accurately commission waterside?
Accurate commissioning is more important than with regular air conditioning systems. Remember, more than 70% of total cooling capacity delivered by the active chilled beam is provided by the secondary coil. Also, water flows through coil are relatively low (around 1 2.5 gpm). This presents a challenge for commissioning engineers as well as for the designers as a minor drop in water flow to the unit will have significant impact on the delivered capacity of the unit. We recommend commissioning the waterside for each unit. This can be done by a balancing valve/circuit setter or automatic flow control valve which will ensure that each unit receives the design water flow.
