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  1. R

    Main earth bonding on plastic water mains and pipe?

    Can anyone tell me if you still require main earth bond to the incoming mains water. All the pipework and central heating is plastic (except 1m of copper from combi on water and central heating). The boiler is about 5m away from incomming mains. Also the mains is a minimum of 5m of plastic MDPE...
  2. Worcester

    Central Networks no longer e-on

    Just seen this on the e-on site: Anyone noticed any differences yet?
  3. L

    Electric Underfloor Heating Vs Water Pipe Underfloor Vs Central Heating

    hi guys In two minds about underfloor heating, am wondering what the advantages and disadvantes are with these types of heating. I´ve installed a few electric underfloor heating systems but only on a small scale. Never come across the water pipe underfloor heating, what do you guys think is...
  4. M

    G59 Relays???

    Does anyone know if G59 relays are absolutely mandatory for every system above 16A/phase? Someone has said that if you install a sunny tripower 10000TL you don't need to install a relay as it has the adequate G59 protection incorporated? I know this is a bit of a grey area but I'm hoping someone...
  5. S

    Central heating price work

    Hi all Just wondering what kind of rates you guys would expect if doing price work on installing central hearing systems. Bonding has to be upgraded if not there and all main earths 16mm regardless of supply due to the contract. Combi, y and s plan prices please. Also please add for the need...
  6. B

    help central heating programmer

    Been called to a job where the client tried to change a central heating programmer. He took the wires out the backplate and forgot to note down where they went! Monkey! So I have the brown and blue from spur which go to L and N of the back plate but then I also have a brown and blue from...
  7. I

    central heating pipe over capped cables

    common sense tells me that over time a hot central heating pipe over my capping for socket is bad news,an is there a minimum distance a socket should be from radiator?i av put my points were builder asked then plumber has come along an done this ready to be plastered over.way i see it 1st in...
  8. S

    My first central heating job

    My first ever central heating job. Simple combi replacement. Timeclock and receiver wired in for wireless stat. Happy days.
  9. K

    Fire Rated SP&N Distribution Boards

    Does anyone know of any manufactures that produce fire rated boards? Its for 110v DC emergency lighting. Cheers
  10. D

    Wireless control of Valves in a Y Plan Central Heating system

    Does anyone know if any companies do wireless control of the valves in a Y plan system? I have looked at the Honeywell solution using ST9420C as the controller but this is WIRED. The room stats (DT92E) are wireless to the controller though which is a start. What I ideally want is a system...
  11. C

    Central network checklist.

    Im abit confused. Hope some1 can help. We've just finished wiring 8 small office units. Each one has a sub-mains, fed with a 3c 16mm swa cable. All are ran back to a central point in the metre building. I am going to run all the SWA's on cable tray into a 3 phase consumer unit with seperate...
  12. S

    Help !! Wiring Underfloor Heating With Central Heating

    This is my first attempt at wiring underfloor heating and i need URGENT advice if possible. The attached diagram is how wired. 2 zone valves, first for central heating with its own stat, second for UFH with three actuators. Actuator 1 is for bathroom with one stat and actuators 2 and 3 are...
  13. S

    Central heating problem

    Seen this somewhere before. Guy calls me to say in the last 3 weeks his street has had a few power cuts. Since then his central heating system which controls both the boiler and the hot water has had the following problem. He can turn both heating and hot water on separately. But when he...
  14. S

    Central heating thermostat wiring

    Hi guys, I am currently on level 3 2330 at night school, and have decided I want to move my stat for my central heating as it is upstairs and I want it downstairs. My question is: the stat is wired in 3core and earth not sure whether 1 or 1.5mm - if I want to extend the cable do I need 1 or...
  15. P

    book on central heating

    anyone recommend me a good simple book, or a book with a chapter or two, or even online resource that goes into how different central heating systems work and how to diagnose faults. The 2330 never mentioned them :( Cheers
  16. D

    Anyone know how to Clea your Central Heating ?

    I was thinking of purchasing one of these 5ltr bottles of central heating cleaner but how on earth do I put it in the system without making a mess? Sentinal X400...
  17. S

    help learning about wiring heating systems, good sources online?

    Hello again, i'm fed up looking on watching people wire these heating systems etc, i'm quite capable of doing it if i just had an up to date book or some website that could expound upon it that i could learn at my leisure, i've had it explained before but something like this requires a bit of...
  18. A

    Central Heating Schematics

    Hope the attached diagrams are useful. AIM
  19. R

    Central Heating Issue - Wiring.

    Hi, Need some advice, I've got a Vaillant combi boiler with a programmable timer (Danfoss) and a seperate stat in the hallway (Danfoss). The radiators all get hot to whatever temperature the boiler is set at - even when the programmable timer is off and the stat set to zero... I'm sure...
  20. M

    urgent helpplezzzzz central heating mix up

    its a gravity pumped system. i have a seimens rwb2e timer and iv mixed the wires. from the fcu there are two twe wires on the load side. on the timer there is L N 1 2 3 4 SO ON CABLE ONE THE LINE WIRE GOES TO L BUT THE BLACK WIRE ON THAT CABLE DONT GO TO THE NEUTRAL IT GOES TO NUMBER 2 R 3...

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