Wireless doorbell

[ban-all-sheds]

So combi boilers have to work in two different modes. Yes they can be designed to be efficient at both levels but the complexity of control and construction makes them less reliable.

Has no manufacturer ever thought of making a "twin boiler" device? One case, one set of water, gas and electrical connections, but inside two totally separate boilers - one for CH only, and optimised for that, and one for DHW, ditto?

 

[JohnW2]

It would require gaining access to the hot supply to the bathroom somewhere, to install a flow switch, but what about using such a switch to control a motorised valve, so that when the shower is in use there simply is no hot water supply to the kitchen taps? Unless you have a house full of teenagers it shouldn't be much of an inconvenience.

It seems that you haven't been paying attention ... back on page 1 ....

Other more automatic and permanent solution would be to fit a flow sensor to your bathroom hot water pipe and wire it to a solenoid valve fitted to kitchen sink hot water pipe, with a small by pass flow, so that if someone does open the kitchen hot water tap they will only get a trickle flow of hot water and the rest will be diverted to bathroom upstairs when it is in use, when bath is not in use kitchen will get full flow.

Kind Regards, John

 

[JohnW2]

Has no manufacturer ever thought of making a "twin boiler" device? One case, one set of water, gas and electrical connections, but inside two totally separate boilers - one for CH only, and optimised for that, and one for DHW, ditto?

It wouldn't surprise me if they had - but, as you say, it would effectively be just a CH boiler and an instant water heater in the same case - and would therefore probably be quite bulky. Furthermore, if the underlying problem was (as I think it often is) the capabilities of the incoming water supply, then even that would not necessarily solved the problems we have been discussing. Don't forget that there have only been a couple of passing mentions (from myself and bernard) of the CH side of things - most of the potential problems discussed have been entirely within the DHW side of things.

Kind Regards, John

 

[ban-all-sheds]

It seems that you haven't been paying attention

Either that or not remembering stuff from several days ago.

 

[Dave123456789]

Bell/button is to go in shower room upstairs

Sounder/speaker is to go in kitchen so people don't turn tap on if people are showering cos flow gets too low.....

I've just thought - how is that ever going to work in practice?

How would the person in the shower know that someone in the kitchen was reaching for the taps and that they should ring the bell to get them to stop reaching?

No basically if I'm showering and flow is reduced upstairs I sound bell - likely someone washing dishes

The speaker part of the bell is placed on top kitchen units

They hear my sound
Wash dishes later lol

Anyway this topic has for the experts and techy talking lol and got me confused but thanks for advice

I'd say plumbing could well be old / badly design Victorian house and dad likes a cheap. Builder !!

But for now we will buy a bell and hope for no interference

And if we change boiler ever we will see if any differenc e

Thanks all

 

[JohnW2]

But for now we will buy a bell and hope for no interference

As I've said, I very much doubt you'll have any problems!

Kind Regards, John

 

[Dave123456789]

If the bell has a plug does it still use frequency ??

Doesn't say in description

http://www.ebay.co.uk/ulk/itm/400675121967

 

[stillp]

It doesn't state the frequency, but that one is CE marked, which suggests that it is intended for the European market.

 

[JohnW2]

It doesn't state the frequency, but that one is CE marked, which suggests that it is intended for the European market.

Does compliance with all of the Directives that is being implicitly declared by CE marking (assuming it is a 'legitimate' CE mark) necessarily mean that it complies with UK frequency allocations?

Kind Regards, John

 

[stillp]

AFAIK the RF spectrum is covered by an EU Directive, so yes.

 

[PBC_1966]

Even though there might be EU Directives about use of the spectrum (and there were international agreements long before the EU got involved), there are still many differences in national frequency allocations between one EU country and another within that overall structure (and on power limits, types of modulation permitted, type of signal conveyed etc.). The "CE" mark in this case says nothing specifically about legality for use in the U.K.

 

[Mikefromlondon]

@johnW2 Thanks for pointing out what i suggested much later that you said was covered on page 1, except the difference being that you do not starve kitchen completely without any hot water when someone is having a bath, so by using a solenoid valve (on or off) as opposed to a motorised valve, ( like zone valve) motorised valve could be made to say open partially and by having a seprate bypass to allow a minimum flow to the kitchen taps would keep the ladies of the house happy.

 

[JohnW2]

AFAIK the RF spectrum is covered by an EU Directive, so yes.

Fair enough, but, as had been said, I thought that individual countries had specific regulations in this respect which were more restrictive than the 'international' (EU and wider) agreements. Were that not the case, there would presumably be no need for national agencies to publish regulations such as the UK ones you recently linked to?

Kind Regards, John

 

[ban-all-sheds]

having a seprate bypass to allow a minimum flow to the kitchen taps would keep the ladies of the house happy.

Putting to one side the apparent notion that only the LOTH do the washing up, there's always the option of the appropriate one(s) going to assist in the shower to bring things to a speedy conclusion.

 

[Mikefromlondon]

So combi boilers have to work in two different modes. Yes they can be designed to be efficient at both levels but the complexity of control and construction makes them less reliable.

Has no manufacturer ever thought of making a "twin boiler" device? One case, one set of water, gas and electrical connections, but inside two totally separate boilers - one for CH only, and optimised for that, and one for DHW, ditto?

But I know many home owners here in London use two separate boilers one for CH and kitchen hot water and a separate boiler fitted inside the bathroom to provide hot water only for the bathroom.

There is no real reason why the bathroom water heater needs to be fitted inside the bathroom, it could be fitted in any other place like in utility room or even in the kitchen close to the main CH boiler. But being in the bath room the pipe work is reduced and also the hot water can flow sooner as less distance to travel.