Hello
I have read some similar old posts on this topic but wanted to check a few things with a fresh one.
Came back from holiday to find no central heating and no noise from the pump. Boiler 35+ year old glowworm fires up fine otherwise and heats hot water.
So I suspect pump failure of some sort.
I have checked a few guides and unscrewed the cap of the front of the pump. Water weeps out as I took the cap off (slow drip) and I span the pump manually with a screwdriver. The pump span freely when spinning it with a screwdriver. Gave it a tap here and there...still no joy when reconnected.
So it could be just a complete failure or maybe the capacitor. Not keen about messing with electrics though, seems a bit of a long shot. Is it?
Any other "repair" ideas...?
So last option is replacement. The model is GRUNDFOS TYPE UPS 15-50x18.
Which from what I have read is a very old model (so has done well to last so long). Grundfos suggest replacement with an Alpha 2 15-50 but rather than 18 has the rating of 130? What does the "130" represent. Will I have any problems by replacing it with a 15-50 130? (the guide below does say the 15/50x18 has a "port" of 130...so does that essentially mean it is the same?)
I got that information from this Grundfos guide
http://cbs.grundfos.com/export/site...s/Final_Pump_Replacement_Guide_A5_0610_lr.pdf
Page 4 near the bottom.....
Finally, replacement looks to be simple. Isolate the valves, remove pump, attach new pump, release valves, and all go?
Is it that easy?
I have read some similar old posts on this topic but wanted to check a few things with a fresh one.
Came back from holiday to find no central heating and no noise from the pump. Boiler 35+ year old glowworm fires up fine otherwise and heats hot water.
So I suspect pump failure of some sort.
I have checked a few guides and unscrewed the cap of the front of the pump. Water weeps out as I took the cap off (slow drip) and I span the pump manually with a screwdriver. The pump span freely when spinning it with a screwdriver. Gave it a tap here and there...still no joy when reconnected.
So it could be just a complete failure or maybe the capacitor. Not keen about messing with electrics though, seems a bit of a long shot. Is it?
Any other "repair" ideas...?
So last option is replacement. The model is GRUNDFOS TYPE UPS 15-50x18.
Which from what I have read is a very old model (so has done well to last so long). Grundfos suggest replacement with an Alpha 2 15-50 but rather than 18 has the rating of 130? What does the "130" represent. Will I have any problems by replacing it with a 15-50 130? (the guide below does say the 15/50x18 has a "port" of 130...so does that essentially mean it is the same?)
I got that information from this Grundfos guide
http://cbs.grundfos.com/export/site...s/Final_Pump_Replacement_Guide_A5_0610_lr.pdf
Page 4 near the bottom.....
Finally, replacement looks to be simple. Isolate the valves, remove pump, attach new pump, release valves, and all go?
Is it that easy?