Came back off holiday and my hot water works fine but heating doesn't. Heating pipe gets red hot and after a few hours the first rad gets warm. Possibly by convection/conduction. So I suspected the pump which a recall was making some odd clicking noises before I went away.
Ive listened to the pump through a screwdriver on the bleed screw and it sounds like it's running. So I've drained the system to inspect it and it looks ok. Ive ordered a replacement anyway.
The replacement is a different model.
Old - Grundfos UPR15-70
New - Grundfos UPS015-60
Plumbers merchants said it would be ok.
My question is regarding the wiring. The old one has a Neutral, Live and Earth feed to the spring loaded terminals and also a live (pin 6) and neutral (pin1) to the capacitor terminal. Im not sure why. Perhaps its a boiler controlled dual speed pump as it has no switch wheres the new pump has a switch with 3 settings.
Any help would be great.
Ive listened to the pump through a screwdriver on the bleed screw and it sounds like it's running. So I've drained the system to inspect it and it looks ok. Ive ordered a replacement anyway.
The replacement is a different model.
Old - Grundfos UPR15-70
New - Grundfos UPS015-60
Plumbers merchants said it would be ok.
My question is regarding the wiring. The old one has a Neutral, Live and Earth feed to the spring loaded terminals and also a live (pin 6) and neutral (pin1) to the capacitor terminal. Im not sure why. Perhaps its a boiler controlled dual speed pump as it has no switch wheres the new pump has a switch with 3 settings.
Any help would be great.
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