Pressurisation units are designed to replace water that has been lost through system leakage.  Most modern boiler and air con systems use a sealed system. Whilst these systems can be filled through a manual ‘filling loop’ this requires physically topping the system up by hand. Large systems can loose a considerable amount of water and when the water pressure becomes too low the system will fail. This is where a pressurisation unit becomes a requirement it can automatically top up a heating or chilled water system whilst constantly monitoring system pressure. A pressurisation unit can also give alarms in high pressure conditions giving a fault and shutting down plant in any type of fault condition.

Its important to have pressurisation units correctly calibrated along with expansion vessels to be set at the correct precharge. If either of these components are faulty or incorrectly set up unexpected faults or system shut downs can occur causing inconvenience and costly call outs