Is my pump pumping the water in the correct direction. According to the installation guide the pump should be on the return pipe to the boiler. However the return pipe gets very hot and the flow pipe is only luke warm. I removed the cover for the electrical connections and noticed a capacitor inside. If this component fails can this cause the pump to turn the wrong way?
pump on potterton puma 80
- Thread starter henry1f
- Start date
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The return is the right hand side pipe. Ignore the colour of the isolating valve taps - they are often wrong.
The arrow on the pump rear casing should face upwards.
The capacitor has nothing to do with the direction - just the rear casing.
The arrow on the pump rear casing should face upwards.
The capacitor has nothing to do with the direction - just the rear casing.
Do the radiators heat up?
Look at the pump arrow on the side of the casting.
If a bypass valve has been fitted (as required by the manufacturer) the return pipe will be hot when the heating is on.
If the pump really is backwards the heating will not work (the diverter valve will not operate).
Look at the pump arrow on the side of the casting.
If a bypass valve has been fitted (as required by the manufacturer) the return pipe will be hot when the heating is on.
If the pump really is backwards the heating will not work (the diverter valve will not operate).
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Some of the radiators heat up, though very slowly.It can take 2 hours to heat these,but still the last 2 radiators never get above cold to luke warm.From cold the boiler fires up intermittently, I would expect it to be fired up continually when starting from cold. There is no room thermostat, the Live and SW Live are linked. The heating control is turned to max. External from the boiler there is no bypass valve, the flow and return pipes go straight out to the first radiator which is about 2 meters away. Is this first radiator used as a bypass valve?
If your pump is indeed the right way round then it could be time for a new diverter valve.
Lots of fun can often be had getting the big nut off the back.
Theres a rather useless plate that you can take off to get a little better access.
Lots of fun can often be had getting the big nut off the back.
Theres a rather useless plate that you can take off to get a little better access.
Sorry for the delay, but have been dragged down with flu. The pump arrow points upwards. So I guess its the diverter valve needing replacing. Is it worth just fitting a new wax capsule or should the complete valve be replaced?
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