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  1. V

    air source heat pump - forward planning for cables to install

    hi I have wired up various central heating systems, y-plan, s-plan, under flooor etc . but i will be doing an air source heat system. They have not yet purchased the pump, but i am on with first fixing and i am wanting some advice on what cables are needed before any of the plans / instructions...
  2. V

    air source heat pump, forward planning for cables to install

    hi I have wired up various central heating systems, y-plan, s-plan, under flooor etc . but i will be doing an air source heat system. They have not yet purchased the pump, but i am on with first fixing and i am wanting some advice on what cables are needed before any of the plans / instructions...
  3. J

    NICEIC Certification Scheme safe isolation- the niceic way!

    niceic initial assessment tomorrow! woop woop Seek permission to isolate isolate, locked off with signage- keep key on you prove my gs38 approved voltage indicators on a known source (will use supply side of main switch?) test between L-N,L-E,N-E for voltage re-prove voltage indicator on known...
  4. D

    12v PIR -- CODE SL099 - -FORMERLEY MADE BY SMITHS/TIMEGUARD

    I need to replace some 12v outdoor PIR`s formerly made by Smiths, then Timeguard. The CODE is SL099 easily found on Google. However, they are nowhere to be had as they have been discontinued. They send a signal to the mains control box (CODE SL055) which controls up to 3000W of lighting and...
  5. Energetic

    Customer wants to source panels.

    Hi Guys, We have a potential customer who can get panels for £50 each from a company who 'clears solar farms'... Don't ask, i don't know the details but it's allegedly legit and he wants a price for installation. It's not something we've considered before, has anyone else been asked to do...
  6. F

    Display energy certificate open source software

    Dear all, I am a student and as part of my thesis there is a high need to perform a DECs calculation on a set of buildings. Of course the overall process is not related to a commercial process and therefore this is not related to the standardized method. So my question is if there are open...
  7. S

    software

    Hi can anybody recommend some software iMac compatible for to edit the architects drawings, basically to add the electrical drawing details to drawing sent over?
  8. H

    Halogen gy6.35 Light Source

    For a project at university I need a fairly intense light source for a fluid dynamics experiment, as the previous one broke. I've been advised a halogen source of around 50W should be sufficient, though as I am a mechanical engineer, my electronics understanding is very basic. Through basic...
  9. D

    Control of Air Source Heat Pump

    I have a CH/HW system with 6 stats, some of which are programmable all at £240V. They control my Oil Fired boiler System. I am having an ASHP fitted which I want to control with the existing 240V timer/stat control system. The ASHP has a pair of terminals (Currently looped) as part of its 12V...
  10. driverman

    Air heat source pumps

    Hi Guys, soon be wiring for an air heat source pump which is to be sited outside a detached double garage with a studio flat above. I need to determine the overall load that will be required to determine size of sub main to be installed. At this point in time I've no info from the owner about...
  11. B

    10 way c/u with main switch on the left?

    Hi All, First post on here! I need a 10 way c/u with the main switch on the left. MK does one but I've read some pretty damning reviews. There's also a brand called Techna that do one, but I can't find anything on that one. Any advice would be much appreciated. :stooge_curly:
  12. F

    Minimum ground needed for Ground Source Heat to work?

    Hi, This is my first posting here so apologies for any transgressions, upsets, etc. I'm going to renovate a house and it's got a fairly large garden. I want to install a Ground Source Heat Pump/system but I've no idea of the minimum size/shape I need to make it work. Can anyone answer my...
  13. S

    Mains hook up problem. Is this possible?

    I would like to be able to plug a mobile catering trailer up to a mains source. The trailer is behind a hire shop and the manager has agreed to come to an arrangement that will allow us to hook our trailer up to his mains if I can find out how to do it legally taking into consideration all the...
  14. S

    Air Source Heat Pump Cylinders - new, hybrid techology, MCS pending. Your thoughts?

    Giona UK - Electric Water Heaters Hot water only. 900 watt pump on the 300 litre version. COP of 2.98 http://gionauk.com/downloads/Direct%20Air%20Source%20Heat%20Pump%20Water%20Heater.pdf Am told this is new tech because it combines the heat pump with a cylinder. Will it get MCS? Will there...
  15. T

    78mm GU10 LED source?

    Do they make a 78mm deep (50mm diameter) GU10 in LED ? if so where is the best (online) place to get them (don't want cheap chinese fake imports off ebay). Got someone with a load of low energies in their kitchen and looking to replace to LED
  16. G

    Eaton rcbo

    Hi dudes. Need to source a mem/ eaton rcbo for a new shower. Do you think I should sack it off and fit a separate rcbo shower consumer unit ? Thanks
  17. B

    Air Source Heat Pumps and RHI

    Evening folks.... We don't install ASHP. So looking for some advice. Does a property need to be a Band D to qualify for RHI in the same way as FITs. I was surveying a property today for a pv system Old stone built 1905 house off mains gas grid. Sent their by their son whom we installed a...
  18. D

    Air Source Heat Pump Signal Flex

    On Air Source Heat pumps there is a signal flex going from the Pump all the way to the Cylinder, It's 0.75mm Flex and I'm getting two opinions about whether it can be run in containment (YT2 and 20mm conduit) with the feed. The spark is saying that it can on 5Kw pumps (2.5mm T&E for the feed)...
  19. H

    High efficiency PV panel source (one-off qty)

    I'm doing an off-grid install on a narrowboat requiring a small no. of panels (e.g. 5 x 100W or 2 to 3 larger panels - aiming for 400Wp to 600Wp with a 450Ah battery bank). Solar payback for this setup is high because its solar or diesel generation only (rough estimate 5p / Ah at 12v). So I...
  20. I

    Vailliant 12KW Air Source Heat Pump hot water problem

    Hello people wonder if you can help me I have been called out to a ASHP with intermittent hot water problem. I have changed the relay checked the immersion but still getting it could it be the timer relay ? I am a little bit stuck as we always wire our controls through a danfoss programmer but...

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