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heat

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  1. B

    New regular boiler (heat only) in a sealed system??

    Hi, I am replacing our 11 year old boiler (due to H.Ex. leak) with a new one. This is in a "sealed" system with red expansion vessel in airig cupboard & a megaflo (no tank in loft). However the exisiting boiler is Vaillant ecoTEC 4xx boiler - which is satated by vaillant as an "open vent" boiler...
    • BenH
    • Thread
    • boiler heat system
    • Replies: 3
    • Forum: Boilers
  2. D

    Radiator Heat Up Order

    I am trying to workout in what order my radiators heat up in order to then balance them. I am able to figure out which radiator pipe is the flow/return on each radiator so that I can then grab the right pipe to check which heats up first. There has been an extension done on this house at some...
  3. T

    h/w cylinder compatible with future heat pump system?

    Hi We urgently need to get our h/w cylinder replaced because it's leaking. Our current system is oil boiler feeding underfloor downstairs, radiators upstairs and an unvented hot water cylinder for hot water. We are thinking of moving to a heat pump at some point but aren't ready to do this. My...
  4. chloeradhsaw

    Two pumps on a heat only boiler quotation

    I just had a quote for a new boiler install as follows I dont undertand why a 15-60 boiler pump is needed and a 25-100 pump is needed as well I currently have an ideal mexico 2 heat only boiler - It has one DAB pump on the boiler return and a 2 port valve at the flow pipe to allow for heating...
  5. J

    Air source heat pumps and hot water

    Hi Can somebody tell me if a standard heat source pump installation uses a pressurized hot water tank? Or will the pressure for the hot water be the same as with my oil boiler and water storage tank (gravity-fed)?
  6. P

    HW takes ages to heat up

    Hello, my HW is taking longer than expected to heat up and it's getting worse. I can go 10-40 degs after 1.5 hours of only heating HW, whereas I should be going 10-60 degs in 30-40 mins by my maths. Don't even mention trying to heat HW and CH at the same time. 30 mins with the immersion adds...
  7. J

    One zone will not heat up.

    Afternoon Fellas If anyone has time to help with this snag it'd be much appreciated. We have a wet-floor system controlled by John Guest UH3 and rather dated Heatmiser DT thermostats. One of the upstairs zones is combined for the bedroom/dressing room. So that's 2 rooms, 2 manifolds, but one...
  8. E

    Snapped screws on heat exchanger require a whole replacement?

    We just had a service done on our Ideal ICOS boiler and were told that the 2 screws on the back of the heat exchanger have snapped off. It was marked as dangerous and has quoted a whole new heat exchanger as there are still bits of screws stuck inside that cannot be removed. For 2 broken screws...
  9. MilkyBadger

    Why Does Vaillant EcoTec 832 Boiler Only Heat in Chimney Sweep Mode?

    Hello everyone, I'm facing an issue with my Vaillant EcoTec 832 boiler and would greatly appreciate your expert advice. The Problem: Heating Not Working Normally. When I turn on the heating, it doesn’t start. However, I still receive hot water, suggesting the boiler does work in some...
  10. T

    Baxi 600 asking for heat

    Baxi 600 central heating is set at minimum the radiator symbol on the boiler is flashing. (asking for heat .fan is still running ) this is like this all day is this correct before I call out engineer there are no other controls ie time lock or room stat on system
  11. N

    Commissioning Vokera Easi Heat

    Good morning all, just a quick one here and i was wondering if someone could give a little advice on their own experience. I don't usually do a lot of installs or a tremendous amount of gas work but obviously when I do undertake these things then I try my best to keep within the appropriate...
  12. P

    Unvented Cylinder Single coil heat pump vs twin coil solar

    Hi, I'm looking to purchase a 300L unvented indirect cylinder to work with a standard heat only boiler. I may have solar panels in the future, but likely the PV kind rather than the thermal kind, and won't be having heat pump in the future. So the cylinder would be connected to the boiler at...
    • p--man
    • Thread
    • cylinder heat pump unvented unvented cylinder
    • Replies: 9
    • Forum: Boilers
  13. D

    UFH fed by heat pump in 120 year old red brick

    Hi, I have a 3 storey house built in 1904. We put UFH in the house about 20 years ago. Works well with newish gas boiler. Just curious... I know heat pumps are meant for tightly insulated modern house ... but.. Question: Given that my UFH is always at a low temperature - Could I feed UFH with...
  14. D

    Faulty heat exchanger

    Hi, Boiler is losing pressure, from 1.5 bar to 0 bar in about 4 hours. Have checked all rads and seem to be fine, no water out external prv pipe. If the heat exchanger is faulty what do I need to look for? There is a constant run of water from the condensate pipe when heating on but not sure...
  15. D

    Wet underfloor heat not coming on in any zone

    We have UFH throughout downstairs. I have had one coil replaced. I have had the thermostats checked that they are linking to the correct actuators, which they are. the cupboard where the UFH system is gets hot when I turn up the thermostats in one or all zones. The boiler is coming on but the...
  16. 50Cent

    Tiny leak from heat exchanger

    Hi everyone, I have taken out the heat exchanger because a tiny leak was found around the red gasket at the top of the heat exchanger of a Worcester Green Star 28i Junior. The gasket itself is in perfect condition with no cracks. As you can see from the photo, the rust is near that holding...
  17. J

    System or Heat Only Boiler

    A (if) CH system has a very high head loss due to improperly sized pipework and long runs and possibly partially blocked pipes and requires a UPS2 pump running at its 8M head to feed 21 rads with a theoretical output of 25kw at a 20C dT. A fairly old Vaillant 438 boiler is being replaced, the...
    • John.g
    • Thread
    • boiler heat system
    • Replies: 16
    • Forum: Boilers
  18. S

    Vaillant "Service Heat Generator" Message

    I have a Vaillant Ecotec Plus combi boiler that was installed just over 6 years ago. It has been serviced annually, the most recent service being about 2 months ago. The controller is a Vaillant VRT 350f wireless type. Recently a spanner symbol and a “Service Heat Generator” message have...
  19. G

    Multiple thermostats and heat exchanger question

    I have a thermal store heated by a boiler with its own thermostat. I also have a stove with a back boiler. The stove heats water in a separate tank. There is a thermostat on this second tank that pushes hot water over to the store tank when it's hot. It's a closed loop and goes through a heat...
  20. D

    Wood burning stove with air to water heat pump

    Is it possible to install a wood burning stove with an air to water heat pump? I was speaking to a few plumbers who have said this is not possible as the air to water system is a pressurized system and the stove needs to be in a vented system.
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