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central heating

  1. S

    Can someone please tell me what sort of unit this image is.

    Can one of you kind electricians explain to me what the unit in the image is and the function of the two buttons please.
  2. S

    Vaillant Eco Pro 30 - no call for heat

    Not getting a call for heat when motorised valve opens. There's continuity between switched live on the motorised valve and the RT terminal in the boiler. The valve seems to be operating. The combi works fine on the hot water side. I've removed the 24V RT bridge as per the installation manual...
  3. M

    worcester green star 18 ri boilers and y plan

    so weve had stelrad elan boilers replaced in rental houses with system boilers teh stelrad hadnt died we just thought time to chamge I had a worcester combi in a house in worcester (the tenant worked for WB ) and recomended ok so we specified Wb boilers we lived in one house and the installer...
  4. telectrix

    Landis & Gyr RWB 2 Channel Programmer Central Heating & Hot Water Timer Module

    HELP !!! i need to replace the above. priced at £225.00, client not happy. what i would like from esteemed experts in heating field is ... what can i replace with at sensible cost. connection wise, there is only L and N in and a T/E back to wiring centre in 3 and 4.
  5. A

    Difference between Dimplex Quantum models

    Hi all, I’ve got a question about the Dimplex Quantum High Heat Retention Storage Heaters. I’ve been in discussion with a supplier about these. He’s provided a few quotes. He’s knocked about £350 off the price by offering my the G series Quantums. He says these are exactly the same as the RF...
  6. N

    honeywell ST6200A1009

    hi chaps - need to replace the above - is it available still? don't want to have to interfere with the fixed wiring on the back plate many thanks dave
  7. Z

    Replacement of old honeywell thermostat with mc6 wifi thermostat

    Hi Guys, Hopefully you can help? I just wanted to get some advice on the wiring of the new MC6 WIFI thermostat? I have attached a picture of what I am replacing and the wiring diagram of the new Thermostat. Please also see recorded voltage readings I have taken. Current Honeywell Stat :=...
  8. B

    Can I use these?

    On a rare occasion, I sometimes have to install a different wireless room thermostat (eg Nest) to an Intergas boiler, which come pre-wired. However on this wiring setup they have used (from memory) female barrel type connectors, and all earthing seems to be of the male type. To save me buying...
  9. James

    tank stat help

    I have a customer, a butchers who have a hot water tank to run taps for washing hands and equipment etc. normal domestic cylinder with an immersion heater. stat keeps tripping on over temp and needs to be manually reset. they are using lots of hot water all through the working day...
  10. E

    Water heater

    A customer of mine has asked for a water heater to be installed that will satisfy a kitchen and bathroom. No room heating. Any suggestions.
  11. A

    Replacing Drayton Thermostat with Digital - Wiring Check

    My drayton thermostat (3-wire) stopped clicking so decided to buy a wifi digital thermostat. Digital thermostat dry contact is not wired to the live within the unit unlike the drayton. Can someone confirm my jumper cable position is correct? (i.e. does it matter which side of the dry contact...
  12. W

    Electric radiators on one circut?

    Hi everybody I'll try to put it as simple as possible. I'm rewiring my two bed flat and want to hard wire all electric oil radiators on one circuit. There'll be 6 Harmoni Lugo oil rads 1x1540w, 3x1100w, 1x660w, 1x500w: all together 6000 watts. One electrician told me every radiator must have...
  13. U

    Big Increase in Electrical Power for Electric Furnace

    Hello; I have a confounding problem with my electrical power consumption at my cottage north of Toronto. I completely close up the cottage for the winter, only leaving the electric furnace on in the basement, with the basement mounted thermostat set to its lowest setting (ie. about 40 oF)...
  14. S

    No heating , changed Solenoid valve

    Hey , new to forum so not sure how it all works but here goes Last week the heating wouldn't come on when called for from Programmer, went into storage and opened the solenoid valve manually and the heating fired up so i assumed the motor was done, ordered a new one. It came yesterday and i...
  15. C

    Vokera linea 24 Nest install

    Hi all, I have a Nest stat, heatlink mounted and has a 4 way & earth connected with a separate 2 way connected. 2 way to go to wall stat T1 & T2 12v from the heatlink. Earth to earth Heatlink L to L on boiler Heatlink N to N on boiler Question is 2 & 3 on heatlink ( i think are supposed to...
  16. barninks

    Heat pump installers

    Hello After some reading recently, I was interested in installing Air Source Heat Pumps, as I think they are a great replacement for a gas boiler. From what i can see a GSHP is even more efficient but a bit more expensive and disruptive. After a bit of research I realised that you need to be...
  17. S

    ESi RF Programmable Room Thermostat. ESRTP4RF

    Hi everyone, I have the above controller and want to install it on a Vaillant ecoTEC Plus 838H boiler, the programmer instructions are vague to say the least but there appears to be 2 options. Method 1 live link pin 1 of the controller receiver and use a single wire to connector X1 connection...
  18. K

    Storage heaters...dual supply and a new way to do it?

    Hello all, I will try and make this a painless as possible but grateful for anyones thoughts. I am currently contracted to install heaters for an eco company. These dimplex units require a permanent 24hr feed to operate the cpu and fan and a 20a dual feed for the heat fed from a second CU and...
  19. EricMark

    Why do I have a wall thermostat? is there nothing better?

    In a way I know the answer, wall thermostat turns heating off when we have warm weather, but I look at the PC and it shows me the target and current in each room from the electronic TRV heads, and I thing if it can tell me when room is cold why can't it be connected to boiler and switch it on...
  20. EricMark

    Hive software options?

    This is how I think one would need to wire Hive on the very old C Plan which has no tank thermostat, however I have been told on another forum the relay is not required, and it can be configured with software to switch pump and boiler with central heating and just boiler for domestic hot water...
  21. C

    Pulsacoil 2000 not heating store

    Hi hoping for some help here, I turned off my boiler over xmas, came back turned it on and now it's no longer heating the store. I've checked both off peak and boost, neither are warming, I've checked and tried to reset both thermostats on both elements, but they both seemed like they didn't...
  22. M

    Turn on central heating when no wifi with Nest system ?

    Hi, My daughter's wifi has gone down, all of south west London Virgin users have no wifi for past 3 days due to someone cutting a cable. She has just moved into a house with Nest installed and is using underfloor heating to get heat. Does anyone know how to manually turn on the heating with...
  23. Andy5678

    25 year old boiler wiring

    Been looking at changing a faulty timer on an oil boiler. the current timer switches between DHW or DHW and HTG. I cannot find any motorised valves, it looks like it’s just controlled with a room stat connected to a pump for heating and some other stat I can’t find for the water. had a look...
  24. V

    Central heating problem (UK)

    My dilemma: I have Gas central heating ('S-Plan' with two port valves. Hot cylinder also has an immersion heater). No activity at the relevant zone valve when 'calling' for hot water. Powering the Immersion heater does activate the hot water zone valve. I have a non-vented cylinder, fitted...
  25. Dan

    Shower Power Booster - Had a drop in water pressure? There's a deal on these, but even when there isn't a deal going they can be a godsend. These little gizmos fire up the pressure of the water feeding your shower (or other taps)...
  26. B

    Hive dual zone

    I have been asked to fit a hive multizone thermostat system on to a dual zone central heating setup.. The components are... Logic heat 12 boiler Honeywell st9100c single channel controller Honeywell cm07 wireless stats.. Looking at the current wiring (see below), it appears theres only one...
  27. D

    Storage heater not charging

    Hi all, hope someone can help or just shed some light. We recently moved into a property that uses storage heaters in the living room. Now it is getting cold we need to use them, however we discovered faults, electrician replaced a part and assured us everything was in order. Have serviced on...
  28. 2

    2nd Zone UFH and 2nd pump

    Hi, I require a second pump connected to a 2nd zone. System is S plan, just a bit stumped with how you only get the pumps on that are calling for heat with only one boiler. Zone 1 at moment pump and boiler comes off 10 which is right but the 2nd pump has to go in 10 as the neutral and earth...
  29. M

    Underfloor heating separate thermostat

    we have a conventional heating system and underfloor heating recently installed by the builders plumber - it’s all wired up (pump, valve, thermostat receiver etc..) but both the electrician and builder seem to be at odds with the connection at the boiler. currently the boiler just has LNE and...
  30. R

    Wiring a 2 port valve on a hive system

    Good afternoon Im in need of some assistance on a job. A new central heating system is being installed (previously storage heating) and the customer has purchased a hive multizone kit. She wants to control her heating up stairs and downstairs seperate so would need zones valves installed. I...
  31. S

    Boiler & 2 port valve problem

    Hi, I have just had a problem last night with my h/w & central heating system, I have found out the boiler has been stopping and starting without the c/h 2 port valve opening, I have tested the circuit and discovered it is the micro switch in the valve that must have stuck in the closed position...
  32. the pict

    Pump on or is it

    Grant Pro external combi I have just nipped across from the sparky forum and hoping for some advice, the boiler stopped working this morning however, long story short I have never had the burner out in the 3 years since it was installed and the prongs were coated in black crud a quick clean and...
  33. G

    Electric Fusion Boiler Repair or Replacement

    Hi, I have a 1st floor duplex flat and upstairs in the boiler room is an Electric Fusion Boiler with hot water cylinder tank. The hot water tank is working fine for the water but the boiler / central heating system which is a bit of a beast, (installed in 2006 image attached), is now faulty...
  34. B

    Issue with Keston C36

    I have a Keston C36 Combi boiler. Stuck in heating mode. I have changed the diverter motor as not moving to transfer across. This didn’t fix the issue. I’ve now changed the capacitor that drives the motor. Again nothing changed. Any ideas on what else it could be?
  35. littlespark

    Possible fault with motorized valve

    I've been phoned by a customer who says his central heating pump is running almost constantly, whether his heating is on or not. (oil fired Worcester system boiler) Its not my usual area of expertise, but im thinking its possibly the motorised valve sticking and not releasing the switch that...
  36. sythai

    Chaffoteaux Britony Combi SE 100

    Evening Guys Anyone have experience of this Combi: Chaffoteaux Britony Combi SE 100 My mates got one in his temporary caravan with dodgy time clock, was hoping to bypass this and control via an external stat. No stat currently fitted. Can’t find any wiring diagrams online? Not seen boiler...
  37. Midwest

    Nest in a bedroom

    In my property, I have an S Plan Plus CH system. The first floor zone is controlled via a low voltage programmable thermostat. The stat is made by Danfoss, and is quite frankly rubbish and needs replacing. The current position of the existing stat, is in the main bedroom which doesn’t have...
  38. S

    Salus, running boiler most of the time.

    I have a salus RT501RF (TX) and the thermostat is Salus RXBC605. The boiler is a baxi duo tec 24 combi erp ( what the label says). I have reset the boiler, thermo and wireless unit, synced them back up due to the same issue but it did not fix it. The problem is the boiler is running all the...
  39. EricMark

    Energenie TRV heads not following Nest.

    Seems intermittent, some times as it should when the Nest thermostat changes temperature the 4 linked TRV heads change with it, but some times they don't alter, not an issue when temperature is dropped but it is an issue when temperature is raised as the pump is sucking on closed valves. Easy...
  40. I

    Thermostat stopped clicking/no central heating

    Hi guys, Had Baxi round to do a service, and immediately after the central heating wasn’t turning on (hot water is fine). Had them back out and they said the boiler is fine, it must be a faulty thermostat. Replaced the thermostat today, and still nothing. When I connect the live and call...
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