16-11-2013, 10:20 AM
The CH pump in my system is a standard Grundfoss, it's an old one, I have no idea how old it is, it was in the old system when we bought the house, it seemed to work ok so I incorporated into my new system, the large slotted screw on the back is normally a bleed screw, the pump should be bled once in a while, if not air pockets can form around the bearings, the bearings don't like running in air, they are designed to run in water, bearings running in air for prolonged periods can do the bearings in.
If the bearing has seized it's worth while investigated the system as to why, however nothing lasts forever, I fitted isolating valves either side of the flow and return ports on mine so in any event the pump can be removed/replaced.
Lawrence.
If the bearing has seized it's worth while investigated the system as to why, however nothing lasts forever, I fitted isolating valves either side of the flow and return ports on mine so in any event the pump can be removed/replaced.
Lawrence.
