Grundfos Conlift 1 LS condensate pump wiring/alarm

[silver50]

Hi Folks

Could anyone clarify the wiring/flex outlet from the unit please? Am I right the outlet becomes a live 240v if triggered by the tank becoming too full- mainly to enable sounding an alarm? If this is the case, do people wire a 240v sounder to it?

From the instructions it appears some boilers have a provision for the connection. Do some new boilers maybe incorporate a small alarm to let you know there is a condensate drain issue?

To save paying to have it done I ran the condensate up and across through my ancient unfloored loft this week, then back down to behind kitchen sink (plan is to get my old standard efficiency combi boiler changed). Still to choose a boiler.

Thanks for advice on how it works

 

[muggles]

Some manufacturers make an alarm which you can buy separately, or you can just fit a proprietary one. The Grundfos one is about £100

Most installers will just wire it into the live supply to the boiler though, to prevent the boiler firing if the pump fails

 

[silver50]

Some manufacturers make an alarm which you can buy separately, or you can just fit a proprietary one. The Grundfos one is about £100

Most installers will just wire it into the live supply to the boiler though, to prevent the boiler firing if the pump fails

Thanks for your reply but sorry I don't understand! Is it not the case that the outlet supply on the pump comes on if there is a problem? How would that stop the boiler firing if it was wired into the boiler's electrical supply..?

 

[muggles]

There are two cables - the power cable and the alarm cable. The power cable is wired to a permanent Live supply. The alarm cable is wired into the boiler's live supply, so that the live passes through the pump cutoff/alarm switch before supplying the boiler. If the pump floods, the internal float breaks the contact and kills the supply to the boiler

 

[silver50]

I'm not grasping this particularly well, sorry.

Are you saying the alarm cable powers the boiler (and cuts out if a problem) OR in some way wires into the boilers own power supply? How can it's live and neutral be wired into the boilers live?

 

[lightning]

Wire pump

Live into live

Neutral into neutral

Earth into earth


The other 2 wire from pump

Wire into live into boiler terminal

Other wire put into chock block with boiler live wire

This will stop boiler firing if fault with pump

 

[silver50]

Thanks.

The question is mainly to let me give the unit a test to make sure the pipework ok but also wanted to understand the outlet cable for the alarm

 

[wannocks]

The alarm cable is just a switch. Usually goes open circuit if the pump stops working and the tank fills.