Question: I can hear some debris that is stuck inside a Magna 3 pump head that is triggering alarm code 51 that needs to be removed ASAP. How difficult a process is it to take it apart?
Answer: Don’t let the look of the pump give you any worries about working on it. If you can turn a screwdriver, you are more than qualified. All that is needed is to get to the inside of the volute to clean it out is just one band screw. That’s it! Below is a quick tutorial on how to take get access to it.
There is a stainless steel band that secures the pump head to the volute. Just loosen the screw and the head comes off.
Installers Tip – When putting the head back on, make sure that it is snug against the volute. Also be sure that the two small holes on the clamp are at nine and three o’clock settings. The reason for this is that there is a weep hole at the six o’clock position that allows excess condensation out to the pump head. It also allows correct positioning of the cooling fins on top to extra the most heat away from the motor.
One band clamp set screw is all it takes to remove the pump head.
Note – When pulling out the impeller, the permanent magnet will try to hold it in. One good pull and it will slowly release.
Special thanks to my Urell counterpart Dave Benham for supplying these pictures from a recent Magna hands-on training class for one of his wholesale distributor’s sales teams. For additional information, contact your local Grundfos wholesaler or if in New England a Urell representative.