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  1. S

    Vokera compact he 35 hot water cycling

    I have a vokera compact he35 combi and would like to check a few things: 1. Is the DHW thermostat “dry” or does the boiler need to be drained to replace this? I ask the above as I am experiencing a few issues with the boiler and thought of trying the above first. Hot water is...
  2. S

    John guest 4 way in line 10mm manifold

    Auto bypass means rad with no trv fitted? Thanks for ur patience!
  3. S

    John guest 4 way in line 10mm manifold

    Shaun, now I'm confused. He has linked the 4th port on the FLOW pipe to the 4th port on the RETURN pipe. The other three ports on both flow and return serve 3 radiators. The system has 16 rads in total served by a number of manifolds. You appear to suggest what he has done is wrong, May I ask why?
  4. S

    John guest 4 way in line 10mm manifold

    should have said all rads have TRVs so I guess he did this as a bypass in case all shut down.....think ill leave it as plumbed!
  5. S

    John guest 4 way in line 10mm manifold

    Thanks, is there a downside of not blanking them off?
  6. S

    John guest 4 way in line 10mm manifold

    System has 16 rads in total, this is just one branch off main 22mm line.
  7. S

    John guest 4 way in line 10mm manifold

    Just spotted one of the 4 ports on the above FLOW unit is plumbed directly into the RETURN unit. Should plumber not have blanked off the unused port on FLOW and RETURN instead of plumbing them together? Manifold is feeding 3 rads.
  8. S

    Freezing 3yr old son's bedroom HELP!

    Just checked and flow and returns are correctly plumbed at manifold. Measured length again and closer to 10m each way! Also noted none of the microbire pipework is insulated, so yet another to do job or is the heat loss through 10mm microbore not worth worrying about? Will be draining the...
  9. S

    Freezing 3yr old son's bedroom HELP!

    Thought I would provide an update on this one, as only fair given all the advise given to date. Currently running system with x400 sentinel in it before giving it a manual flush using mains pressure in a couple of weeks time. What we found to date - 2 problem rads (slow to heat and not heating...
  10. S

    Freezing 3yr old son's bedroom HELP!

    took a break from this problem as a- we had a temp swing of +15 degree here in Glasgow in the last week and so not so urgent as before and b- head was spinning fault finding. Consensus appeared to be that there was a blockage in the return leg from 3yr olds radiator. Whilst I have yet to...
  11. S

    Freezing 3yr old son's bedroom HELP!

    brainwave.........perhaps, just seen brothers hot rad - 65 top, 67inlet, 55 outlet (ideal 12 degrees temp drop) with lockshield at 2 turns from open. Problem rad is wide open on lockshield with inlet of 63 and outlet of 58 (5 degree drop) and top of rad at 58. Surley if I throttle down...
  12. S

    Freezing 3yr old son's bedroom HELP!

    well. after a couple of days tapping the TRV in 3yr olds room, finally bot the bullet and replaced the TRV body completely with new unit. Pump speed 3. with the result .....................NO CHANGE! 55degree radiator temp at top compared with brother room at 65 degrees. Radiator no cold zones...
  13. S

    Freezing 3yr old son's bedroom HELP!

    7:30am - 52 lounge, 55 bedrom, coming up but slowly as other rads in system start shutting down on thier TRVs as rooms reach temps...........downside of all this is I now have a boiler pressure of 2.7bar!!!!!!!!!1 up from 1bar cold. Clearly increasing pump speed to 3 with current lockshiled...
  14. S

    Freezing 3yr old son's bedroom HELP!

    7am update, heating on for 1hr, 1-degree outside..............no improvement. rads 65-degree throughout house, problem 2 still at 50. Going to kick out theem with a mallet when I get back from work tonight
  15. S

    Freezing 3yr old son's bedroom HELP!

    Can I just ask one more favour - Im seeing 1.25 bar pressure rise from cold to hot and have a cold pressure of 1bar, hot goes just over 2bar after 3 1/2 hours tonight. Does this indicate I should check/re-pressurise the expansion vessel or is +1bar from heating acceptable? The vokera 35h EV...
  16. S

    Freezing 3yr old son's bedroom HELP!

    p.s only addressing this now as always thought the insulation in the boys room was the issue and so improved that first, which I did last summer and before having a IR thermometer. Brothers room is toasty warm now, but 3yr olds is freezing in morning. Homed in on rad issue afetr buying an IR...
  17. S

    Freezing 3yr old son's bedroom HELP!

    Never worked in my view. Home purchased after previous owner renovated from 2 bed to 4 bed bungalo (extended in every direction you can think of). So dont know if all rads were added to the system when the boiler was installed (2010) according to home report or after final building works...
  18. S

    Freezing 3yr old son's bedroom HELP!

    p.p.s - I see there was some "friction" in the forum between members. All I will say is I appreciate everyone's feedback and thank you all for taking time to try and help out, be that from the position of practicing "certified" engineer or experienced homeowner who has faced similar issues.
  19. S

    Freezing 3yr old son's bedroom HELP!

    p.s. system has been on pump setting 3 for the last 18-m (when i bought the house) and only changes to speed 2 at the weekend after father in law was round, so prior to tonight the system still failed to heat up the problem rads when pump was on 3. I therfore wonder if the valve tapping has...
  20. S

    Freezing 3yr old son's bedroom HELP!

    Update: I have a HIVE thermostat, so turned the heating on from work at 4pm. Got home about 6pm, problem rads still showing top middle tems of 48 lounge and 53 bedroom respectively. Inlet pipe red hot (well 65 anyway with flow from boiler showing 70 using IR thermometer so prob slightly higher...

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