[P @ F]

Thanks for that Mike .
However I got this yesterday to try out , it’s a magnetic reed flow switch,
It will be wired to the live on the diesel pump , if the water stops the switch will open cutting power to the diesel pump, this will send the heater into shutdown.
Only thing that might be a problem is when the pole is dead ended  there is a slight delay before the PRV opens up .
If no good it’s back to the good old days of a bypass tap , it will definitely work with that as flow does not stop

[zesty]

Keep testing mate, it’ll be Perfect before long!

[a900]

Some good ideas in those last 2 posts

What flow rate does the reed float switch cut off at ?

Does it need to be in a certain orientation?

[P @ F]

Some good ideas in those last 2 posts

What flow rate does the reed float switch cut off at ?

Does it need to be in a certain orientation?

It needs to be vertical and I recall that 500ml a minute will keep it doing what I want it to do!

[P @ F]

I have a sneaky mod for the PRV if the switch doesn’t play ball 

[P @ F]

And then you go on another site and get this 

[Smudger]

 

[P @ F]

Full steam ahead now !
The magnetic reed flow  switch has worked perfectly for me .
We now have thermal protection on the heater side as manufactured and user error and pump failure protection on the water side .
I would now be happy to leave the heater on low setting all night , a very cheap pre heat and frost stat feature without any extra cost  !

To clarify , I seem to remember that the most popular choice of in and out water connections was standard half inch hose , correct ?

[P @ F]

Oh lookie here , the latest heater to land in the UK , real or fake ?

[NWH]

I think where it’s from tells you that lol,isn’t that where all the dodgy stuff comes from.

[P @ F]

Yeah , all our phones , tv’s , computers, I bet even the components in a Grippa hot 🤣

[P @ F]

I bet if you went around all your possessions and chucked everything Chinese out you’d have feck all left that worked

 

[escorttdi]

what price are we at??

[P @ F]

We are still  at £850 at the moment but I have just taken a punt on another importer that could knock £50 off !
Just have to wait and see what comes in the box , I love a gamble 

[zesty]

Full steam ahead now !
The magnetic reed flow  switch has worked perfectly for me .
We now have thermal protection on the heater side as manufactured and user error and pump failure protection on the water side .
I would now be happy to leave the heater on low setting all night , a very cheap pre heat and frost stat feature without any extra cost  !

To clarify , I seem to remember that the most popular choice of in and out water connections was standard half inch hose , correct ?

Yeah mate, 1/2 inch hose for all my current connections.

Is this reed flow switch able to work with turning water on and off?

[P @ F]

You can’t turn the water off mate !
It has to keep flowing at all times , once you cut flow to the brush head it diverts back to tank , this is what the PRV is for .
If you stop the water it will superheat inside the heater itself and go bang or blow the hoses off showering anybody close with boiling steam !
This is why I have fitted safety measures, the PRV diverts the water and keeps it moving and the flow switch shuts the hearer down instantly if the water stops

[zesty]

You can’t turn the water off mate !
It has to keep flowing at all times , once you cut flow to the brush head it diverts back to tank , this is what the PRV is for .
If you stop the water it will superheat inside the heater itself and go bang or blow the hoses off showering anybody close with boiling steam !
This is why I have fitted safety measures, the PRV diverts the water and keeps it moving and the flow switch shuts the hearer down instantly if the water stops

Ah ok, I wasn’t sure if this was a water ‘on off’ device.

As you were then!


So do the grippa diesel heaters also have to run constantly? I’ve never really thought about it. In my mind, I always imagined they cut in and out with water flow, like a gas one! Me being a novice in all things diesel heaters!

[P @ F]

It’s not like a gas job mate , they are instant ignition and cool down , diesels need proper start up and shutdown cycles .
There is no problem with running a water pump all day other than the fact that it will wear out  sooner , but even that is not in stone , I was once told that a constant running pump will fare better than one that is constantly arcing out with the stop starting all day .
Power use for me with the normal shurflo 5.2 L pump and heater maxed out is at most 6 amps for every hour worked

[P @ F]

When I say maxed out I mean with settings I have been running today , I got water from 13c to 60c from the first job !
If you only want 50c water you would be looking at 4.5 amps per hour

[nathankaye]

To clarify,
You leave the pump on but obviously can use a flow controller to the brush end to stop water flow. However the pump still works and the water flow is diverted back to the tank (or wherever you choose to divert it)