Shower pump install help - Grundfos STL 2.0CN

[iandb0812]

Folks,

Can some one give some detail and help me out??

I have swapped out old pump with this Grundfos one. Have literally reconnected the water pipes as per the previous pump and plugged in and no joy with water although the pump is running.

Problem:

Plug the pump in and it runs continuously with out the shower being on and no water coming through.

Switch the shower on and still no water.

The pump has a LV transformer which is wired directly to the pump and then has a mains connection. There are 2 wires to connect to the pump but no indication asto which way round. Could this be a problem??

The manual says to connect to a 230v switched spur. Is this different to putting a plug on and plugging into a normal mains socket or is this a completetly different connection?

Below is a pic of the hw tank and I assume an electrical supply (white box)

This photo is where the previous pump was plugged in. The unit above is the CH / HW Controller. One wire comes out and goes to the socket and the other wire that goes off to the right ends up inthe white box in the photo above.

 

[45yearsagasman]

The pump in the pic is a CH circulating pump and has nothing to do with a shower. What exactly are you trying to do?
Fitting a new CH pump will not cure a shower pump fault

 

[stem]

The pump has a LV transformer which is wired directly to the pump and then has a mains connection.

The manual says to connect to a 230v switched spur.

As the pump requires a 230V supply, it should be connected to a mains supply not via a transformer. Looking at the first photograph it looks as if it has a white wire going to the wiring centre (not the transformer) which is correct. The wiring centre is connected to the control circuitry for the heating system so that the pump only runs when necessary in conjunction with the central heating and water heating loads. The pump should not be permanently connected via a plug and socket. It wastes energy and depending upon the the type of system you have may damage it.

But above and beyond all of that, as 45yearsagasman says, this pump has nothing to do with getting water to your shower.

This photo was where the previous pump was plugged in

Is that a reference to the black lead in photograph 2? if so what's on the other end of it?