How to Size Rolairtrol Air Separators

A hydronic heating system uses water to move the heat from the boiler around a building. These systems are prone to air buildup in the pipes when the fresh water inside releases its oxygen. Removing the air is vital to the system's operation because the circulation pump cannot move the air through the pipes. Modern systems use an automatic air removal device installed on the supply pipes to the radiators. Sizing the unit is easy once you know the capacity of the circulation pump.

Instructions

1. • 1

     Look for the hydronic heating system's circulation pump. It is typically mounted on the water pipes next to the boiler. It is an electric motor fastened to the pipes.

   • 2

     Read the data plate on the pump for its flow rate in gallons per minute (GPM).

   • 3

     Look on page 5 of the Rolairtrol Air Separator data sheet and locate the Rolairtrol model number that corresponds to the flow rate of the pump. Choose an air separator that has a slightly larger capacity than the pump to assure it will handle the load.