Best place on hot water cylinder to mount DIY thermostat ?

[picbits]

Having spent the morning with it I'm not sure now if its vented or unvented (I don't spend a lot of time in the airing cupboard).

Bear in mind this cylinder has been running at full temperature with the boiler on full since we moved in last year........ any thermostat is going to be a help here.

Its got what looks like a built in water tank at the top, an overflow pipe leading to the back wall (where it occasionally spits a drop or two of water when the water is really hot). Pump attached to the side and what looks like a silver expansion vessel attached to the cold feed.

Sod it - here's a picture - is this vented or unvented ?

 

[kevindgas]

definately vented
but what do you need the hot water bottle for

 

[JohnD]

I'm surprised the water doesn't spill out

 

[Balenza]

onetap wrote

when it bursts.

You mean like this.
http://www.waterheaterblast.com/
Thats the question you gotta ask " Is their a bomb in your home ?"

So what else have you b*****r about with on it?

Mebbe he's plugged the prv's.

OOOps , its a thermal store.

 

[Balenza]

picbits wrote

I'd have used a PIC Microcontroller with an LCD display and a small keypad for data entry.

Very nice.

I priced it up yesterday and could have done it for around £15

A PIC microcontroller for £15 ????.

 

[Softus]

I'm surprised the water doesn't spill out

Thanks John - my guts have spilled out through the splits in my sides.

 

[Onetap]

Mebbe he's plugged the prv's.

OOOps , its a thermal store.

Yeah; so did you work that out from the original description?

Or did you wait until he'd posted a picture before acting the ****.

The latter, I think.

 

[picbits]

but what do you need the hot water bottle for

Strange one this but once a month the missus fills it up and takes it to bed with her.

Even stranger she seems to bite my head off at regular intervals at around the same time ..............

 

[picbits]

picbits wrote

I'd have used a PIC Microcontroller with an LCD display and a small keypad for data entry.

Very nice.

I priced it up yesterday and could have done it for around £15

A PIC microcontroller for £15 ????.

Aye - a small PIC microcontroller costs me around £1.50
Screen - £3
Keypad - £2
Case - £2
Power supply - £4
PCB (I have in house PCB manufacturing facilities) - £2
Temperature sensor - £1
Other components - £1

I've had a word with gasman26 on here and he's sorting me out a new Broag boiler (as long as my plumber is ok to fit it) so hopefully this will only need to keep going for another couple of weeks before I get a new system installed.

 

[Softus]

I priced it up yesterday and could have done it for around £15

But that excludes a significant amount of your time.

PCB (I have in house PCB manufacturing facilities) - £2

If you really do, then a one-off board would cost you £thousands. Or are those "facilities" just a soldering iron and pump?

 

[picbits]

PCB (I have in house PCB manufacturing facilities) - £2

If you really do, then a one-off board would cost you £thousands. Or are those "facilities" just a soldering iron and pump?

Well I've got a film printer for making the negatives, 2 x UV exposure units for transferring the PCB design onto a photoresist board, triple etching tanks and a CNC drilling/milling machine...........

I also have a soldering iron (well 6 of them actually) and a couple of pumps

I can go from a PCB design in software to a fully etched, drilled and populated board in a couple of hours and on a run can knock out over a hundred boards a day ..........

Does that count ?

 

[picbits]

Here you go - a complete controller circuit for a Servis washing machine from a few years ago.

I got fed up with the machine refusing to spin my socks so built another controller from scratch for it with a RS232 interface to hook it up to a PC.

I had tens of thousands of hits on the site with the project on from people who thought I was mad

 

[JohnD]

is this the one that failed User Acceptance Test?

 

[picbits]

is this the one that failed User Acceptance Test?

Thats the one

I just managed to get it going perfectly and the missus informed me that she had gone out and bought another machine

On the plus side my heating came on properly this morning, switched from HW to CH when the tank heated up and as long as it doesnt spring any major leaks should last the next few weeks before the new Combi system goes in

 

[Softus]

Well I've got <list of tons of stuff>
.
.
.
I can go from a PCB design in software to a fully etched, drilled and populated board in a couple of hours and on a run can knock out over a hundred boards a day ..........

Does that count ?

Very amusing, I suppose.

I think you deliberately misused the word "manufacturing" - I'd call the thing that you can do "fabricating".

And you seem to have ignored my point about the value of your time.
My own time is worth an awful lot more than £0 per hour.