When selecting a pump (also referred to as a circulator or circulating pump) for your outdoor furnace system, it is important to correctly size it to work properly within the system. Some factors to consider are the diameter of the supply and return lines, total length of the supply and return lines, equivalent length of each component installed in series, and flow rates of the pump(s) at common equivalent lengths. You can find technical data for selecting a pump in the Hydronic Components Selection Guide provided with your furnace. An overview is also provided in the Installation Guide. Because selecting the proper pump for your application is important to your entire heating system working correctly, if you have any questions you should consult your Central Boiler dealer.
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