Horizontal water cylinder

[Soulsurfer]

Hey all, so I'm rewiring a nightmare house while girl still living in it ! Plumber gets a cylinder and says direct 1 X 3kW standard immersion. So I run a 2.5 through most of house to loft.. Comes today saying just worked out he got wrong cylinder and where he wants it there is no space for vert so he gets a horizontal one which has 2 X 3kW elements instead ! I was going to leave dp switch and a grasslin timeswitch at source in garage to control it but as now 2 elements would you... Run a second 2.5 from seperate rcbo and second dp or I'm thinking maybe add a 4 pole contactor and switch coil of it with the time switch to bang on both elements in unison ? Trying to be cost effective and sensible or run a 4/6mm twin and split from a cooker outlet or similar at cylinder on 2 x 2.5 flexes to elements ?

 

[bigspark17]

Run an additional 2.5 in, domt complicate it more than is needed here!

 

[Wilko]

Good morning - may I suggest an iso switch at the tank for full control during servicing? (Think you mention it being away in the garage?). Perhaps Customer needs a loft radial outlet cct and you could run in the 4 or 6 as if nothin ever happened? Cheers, David.

 

[HandySparks]

Why not just use one element only?

 

[bigspark17]

Good morning - may I suggest an iso switch at the tank for full control during servicing? (Think you mention it being away in the garage?). Perhaps Customer needs a loft radial outlet cct and you could run in the 4 or 6 as if nothin ever happened? Cheers, David.

I was under the assumption that he would obviously fit 2 local isolators adjacent ti the tank.! If theres two elements id strongly suggest running two supplies in!

 

[HandySparks]

Is the water heating entirely electrical or is the immersion heater just for backup?

 

[freddo]

It says direct in the first post so electric only. As above I'd just run another 2.5mm supply and be done with it. That way if something goes awfully wrong on a circuit the second one is unaffected.

A contactor would do if you were sticking with one timer, I guess in the garage the clunking wouldn't be too noticeable in the house. There won't be much price difference with a second timer, it will be quieter and again it is less to go wrong and allows some backup.

 

[Soulsurfer]

Thank you all, unfortunately I've had none of the usual emails to let me know there have been replies !?? I went today and ran in a second 2.5 radial to the loft, as it's horizontal cyl I'm guessing that's why they require two elements at once to spread the heat ? As obviously with the vertical standard ones the heat will rise through the water better. I'm thinking of siting 2 X seperate time switches at garage end adjacent to new C/U and wasn't set yet whether to fit d.p. switches to each there or at cylinder end in loft as prob safer for local isolation as mentioned. Builder saying 2 time clocks a pain to setup etc especially in event of a powercut but I said be a lot more hassle climbing about in rockwool in loft to set them and two little time switches would take seconds to set along right time again anyway.

 

[Soulsurfer]

Oh and yes sole form of water heating
( direct ) pressurised system as boiler solely does rads in house. Thanks

 

[Wilko]

Hi SS - if you're missing email updates, check your "junk" mailbox as they might be going there (recently discovered a stack in mine). One of the clever folks here can probably tell us how to fix that ... Guys?