40A Flow Switch

[LED Lighting]

Hi everyone

I am looking for a water flow sensor/switch to turn on a 11.5Kw shower.

The flow sensor/switch must be capable of handling 40A for a period of upto 2 hours of use.

Does anyone know of such a thing if one exists?

 

[KAS1]

What's wrong with a contactor ?

 

[Farmelectrics]

Not herd of that before exactly how does it work

 

[driverman]

As Kasi says. Why would you want an electric shower to be on for 2 hours? Is that for continuous use?

 

[itselectric]

Whatever it is for I would be checking with the manufacturer that the shower would be able to sustain 2 hours of uninterrupted use.

 

[Farmelectrics]

That was my question why would you use a flow switch you turn shower on get washed and then turn it off in my house lol

 

[driverman]

Exactly itselectric

 

[KAS1]

It's probably a shower being adapted for some other use lol

 

[ian.settle1]

Hi everyone

I am looking for a water flow sensor/switch to turn on a 11.5Kw shower.

The flow sensor/switch must be capable of handling 40A for a period of upto 2 hours of use.

Does anyone know of such a thing if one exists?

Think you will find that showers are not designed to run for this length of time.

 

[KAS1]

I knew you had heard of a contactor..........

Not herd of that before exactly how does it work

 

[LED Lighting]

I should of explained in the op.

the issue is this property is using a 5L (under sink) hot water tank to fill a bath, sinks, shower (non electric). The current tenants won't use the shower!

they have asked me to find away of filling the bath with hot water, I have looked at demand hot water heaters but can't find anything suitable.
I think the 2hrs was an over guess but could happen as tenant has been known to leave hot water tap on for hours.

has anyone else got any other ideas?

 

[snowhead]

So basically you need instantaneous hot water heated by electricity in a sufficient quantity to fill a bath before the first water goes cold?

I hope this property has 3 phase.

 

[LED Lighting]

No only single phase - domestic property

 

[snowhead]

Think about the kw rating of gas combi boilers then work out why it can't be done with electricity.

 

[ian.settle1]

I should of explained in the op.

the issue is this property is using a 5L (under sink) hot water tank to fill a bath, sinks, shower (non electric). The current tenants won't use the shower!

they have asked me to find away of filling the bath with hot water, I have looked at demand hot water heaters but can't find anything suitable.
I think the 2hrs was an over guess but could happen as tenant has been known to leave hot water tap on for hours.

has anyone else got any other ideas?

What wrong with an old fashioned hot water tank with an immersion heater?

 

[LED Lighting]

What wrong with an old fashioned hot water tank with an immersion heater?

No room to place it in the flat!
already thought about this one but not an option

 

[KAS1]

Can they not use the "Public Baths" sorry just thought I was back in the 19340/50s or go to the local swimming pool a couple of times a week

I should of explained in the op.

the issue is this property is using a 5L (under sink) hot water tank to fill a bath, sinks, shower (non electric). The current tenants won't use the shower!

they have asked me to find away of filling the bath with hot water, I have looked at demand hot water heaters but can't find anything suitable.
I think the 2hrs was an over guess but could happen as tenant has been known to leave hot water tap on for hours.

has anyone else got any other ideas?

 

[LED Lighting]

The current tenant has learning difficulties (didn't want to go down this route) and refuses to use the hot water mixer shower!

this is the same reason way they sometimes leave the hot water running!
most if the time the carer runs the bath.

 

[Marvo]

I be very careful for liability purposes if you alter an appliance in order to make it operate in a way that it was not specifically designed and supplied to do so you will end up in court if something goes wrong.

In answer to your question I've never seen a 40A flow switch. We regularly use Johnson controls flow switches but the largest AC3 current capability is 16A as far as I know. Chances are if you do find a 40A flow switch it's going to be pretty large so I'd also suggest using a small flow switch together with a contactor.

 

[Richard Burns]

Can you not have an instantaneous hot water system and install a cut off timer so that it can only run for x minutes before it stops, I.e. enough time to run a bath. These can go up to about 8kw which shoudl have enough capacity if they have an attached tank.
If it is stopped and switched back on the timer resets, then if there is a problem the tenant is doing it deliberately.