Boiler pump

[planemad]

Just a question for my knowledge on an open vent system does the boiler call for the pump for CH only? Or does it use it to heat up the stored water in the tank when I select HW only on the wall programmer.

Thanks

 

[Dan Robinson]

If installed correctly the pump is used for both heating and hot water.

The boiler ideally should have control of the pump, although it is not vital on all makes and models.

 

[planemad]

If installed correctly the pump is used for both heating and hot water.

The boiler ideally should have control of the pump, although it is not vital on all makes and models.

Thanks

 

[Dan Robinson]

No worries.

 

[D_Hailsham]

If installed correctly the pump is used for both heating and hot water.

True, if it's a fully pumped system; but not if it's pumped CH, gravity HW.

planemad
Use a long screwdriver as a stethoscope to listen to the pump.

 

[Dan Robinson]

The OP has a shiny new 4 series Bunny. I would certainly hope his system is fully pumped

 

[mogget]

And I would hope the pump is wired to the pump connection on the boiler so that the pump overrun operates.

Dan, he has a Y-plan system IIRC.