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Again if these need to be replaced an HVAC technician should replace these.The radially-split body can be left in the line while servicing the pump, eliminating need to disconnect pipes.Īrmstrong circulating pumps are constructed with over-sized shafts of special alloy steel. However, from time to time they can stop working and need to be replaced.
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They are usually very reliable and need little maintenance. Typically these are located on the risers of the piping.įurthermore, they automatically vent any air that gets into the loop. Your system should also have automatic air bleeders or automatic air vents located somewhere in the loop. In some cases, you will get water only and in other cases, you will get lots of air. Take a rag with you and open the air bleeder until you get water. Finally, it could also cause boiler pressure problems causing your pressure relief valve to vent. Furthermore, air management in your boiler loop systems is important. If you have an air bleeder key then you can go around to all your radiators and open these air bleeders with the key. The air bleeders require a key to open them and hopefully, you have an air bleeder key.
#ARMSTRONG ASTRO 30 PUMP FLOW THROUGH MANUAL#
Many radiators and even baseboards have manual air bleeders on them. It is necessary to remove the air from the system. Air will build up usually on a riser or in a radiator. The next thing that can cause the water not to circulate in the water loop including to the radiators is a hydronic airlock. Some circulator pumps require maintenance while other pumps are maintenance-free.Īutomatic Air Vent or Automatic Air Bleeder Other problems with the circulator can be a bad motor or a leaking bearing assembly. They will also know the correct procedure for replacing the impeller without causing additional problems which if you really do not know what you are doing you can cause additional problems. If this is the case, you should really call a boiler technician to fix the problem.įurthermore, many will have the parts on their truck and can have you up and running in an hour or so. Impellers do go bad from time to time and need to be replaced. If it is a direct-drive circulator pump then you need to inspect the impeller to make sure it is good. If the coupling device is broken it needs to be replaced and that was your circulation problem. Pumps with coupling devices need to have the coupling device inspected to make sure it is not broken. In other words, the pump motor is directly attached to the impeller with certain pumps. The impeller pushes the water through the pipe and some pumps do not have coupling devices but are direct drive. This device connects the motor to the bearing assembly where the impeller is located. Some pumps have a linkage or coupling device. I would check the aquastat to make sure it is engaging the circulator pump as the aquastat has a relay that turns the circulator on when there is a call for heat and the temperature inside the jacket is the right set point temperature according to what the aquastat is set for in temperature ranges.
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This should be located near the boiler in the near boiler piping. The first place to start is the circulator pump. Kate, there can be several things wrong that keep the water from circulating through the water loop. Can you give me some insight into my boiler circulation problem? Kateīoiler Circulation Problems | Troubleshooting Hydronic Water Loops The boiler seems to be working fine but the radiators are cool. The radiators are cool and we don’t seem to have good heat. This pump has a coupling device between the motor and the impeller.īoiler Circulation Problems | Troubleshooting Hydronic Water Loops – Richard, we have a hot water boiler and we are having problems with the circulation of the water.