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  1. cr0ft

    Sealed System Additional Expansion Vessel Needed?

    Hi all, As a few of you will know, I'm a bit rusty on the tools now and was wondering how to tell whether an additional expansion vessel is needed. In short: - Have moved into a house with a sealed heating system, system keeps losing pressure but no obvious leaks. It's heated by a Greenstar...
    • cr0ft
    • Thread
    • expansion expansion vessel system vessel
    • Replies: 4
    • Forum: Plumbers Arms
  2. cr0ft

    Leaking UFH manifold actuators

    Hi all, I have just moved into a 7 year old house which has plumbed UFH serving the ground floor. The manifold is a JG Speedfit manifold controlled by 12x A4000 NC 230v actuators. Several of the zone control valves require replacement as they are leaking from the spindle (especially when the...
  3. cr0ft

    Replacement Combination Valve

    Ladies and gents, I have been out of the domestic plumbing game for a good few years now and was wondering if anyone knows what the replacement model for this combination valve is on my 9 year old Santon Premier Plus unvented cylinder is? I was going to try and call a few wholesalers on Monday...
  4. cr0ft

    Commercial Boiler Install Minimum Efficiencies

    Hi all, my employer took on a new build property which was built for them last year. There are 4x 480KW Ideal condensing boilers installed to serve a district heating network serving approx. 560 student apartments. Due to a lack of decent control, these boilers are achieving a seasonal...
    • cr0ft
    • Thread
    • boiler commercial install
    • Replies: 6
    • Forum: Boilers
  5. cr0ft

    BMS Controllable Commercial Boiler with High Modulation Ratio

    Hi all, hope everyone is keeping well. I was wondering if anyone can help me work out the best boiler to cover this: - 1.) Modulation ratio of 9:1 or higher. 2.) BMS controlled modulation via 0-10v signal. 3.) BMS feedback re boiler modulation via 0-10v signal. 4.) A reliable boiler too...
    • cr0ft
    • Thread
    • boiler commercial high
    • Replies: 3
    • Forum: Boilers
  6. cr0ft

    Control of AHU Pre-Heat Coil

    Hi all, I've got 2x AHUs where I work with pre-heat coils after the filter on the supply ducting. These are heated using the boiler CT circuit. On both of these AHUs the method of control of heat to the coil is a 3 port mixing/diverting valve with the central port blanked off. There doesn't...
    • cr0ft
    • Thread
    • control
    • Replies: 9
    • Forum: Boilers
  7. cr0ft

    Spillage on inside of case (Worcester Greenstar 24i System, 2001)

    Went to this boiler today to service for the first time and found black spillage marks all over the inside of the outer case (mostly inside the airbox seal area but not all, some are clearly visible outside the seal). Noticed there is a case screw missing on bottom left so am going to replace...
  8. cr0ft

    Commercial FGA

    Hi all, Starting to do some commercial boiler servicing at work. For direct and indirect boilers/water heaters including domestic what's the best FGA to look at??
  9. cr0ft

    Water consumption for small hospital

    40 ish in patients, circa 100 staff in from 9-5. Skeleton nursing staff overnight just to keep things running. 6000L of cold and hot used from 11:00-16:30 yesterday. Another 6000L used from 16:30-03:00 this morning when the tanks ran dry!! I closed off bathrooms at 16:30 yesterday so is it...
  10. cr0ft

    Brazing Copper to Brass Flanges

    Hi again. Another few obvious questions for those who know the answers I'm sure :) 1.) Is there a maximum pipe diameter where fittings can be soldered before it stops working? 2.) For brazing as opposed to soldering, what filler would you use to join copper to brass? Also what flux do you...
  11. cr0ft

    Honeywell 832.3 Timing Diagram

    hi all, I remember from my commercial course that you can use the timing diagram to work out what component his causing the problem when the safety controller locks out. https://www.anglonordic.co.uk/files/3101000%20TF%20830.3%20Control%20Box.pdf How do I convert this timing diagram into...
  12. cr0ft

    Thermal Balancing Valves - Where to Place Them?

    Hi all, Where should these be placed on a commercial hot water system? As close as possible to the end of the return leg closest to the outlet? Which is the correct way to do it on a commercial installation, option 1 or option 2 in the link? Please explain why so I can understand...
  13. cr0ft

    Temperature problems with large commercial hot water system

    Hi all. As most of you will know I've gone back on the cards now and am now fault-finding one of our commercial hot water systems in a 5,800sq.m building. It's a large building on a hospital site. The hot water system is an old system! Heating is run from a steam feed from the main hospital...
  14. cr0ft

    New Tool List - on Ebay tonight at 7pm.

    I'm too lazy to list all the auction URLs so I will list the tools that are going to be on there by 7pm. To find them click this link to view all of my auctions and go to the ones that you're interested in. I suspect there will be some real bargains! Most are collection only but I'm happy to...
  15. cr0ft

    Help - Best heating control

    Hi all, Swapping a boiler and moving it today and tomorrow and after some advice on the best controls to fit. Here's the constraints:- Existing room thermostat in the downstairs hallway will have to be replaced with a wireless one It's a Y-plan system and I need to fit a new two channel...
  16. cr0ft

    First Commercial LPG Job!

    Why do I always get these jobs lol. 293KW direct air heater running on LPG. Was running it right at the start when I noticed a nice 4" crack in the end of the burner exhaust assembly. Why do I get the feeling this is about to get expensive for the customer?? And check out the state of the...
  17. cr0ft

    I'm Commercial Now :)

    Basically just wanted to say I'd done it :) Now I can say 'I'm commercial don't you know' just like how croppie did :)
  18. cr0ft

    What do you need to run a Plumbing/Gas training centre?

    Been thinking about this for a while. Our business has a large warehouse unit that could be partitioned off and we could add in a classroom relatively easily. There isn't a training facility like this in Lincoln and there seems to be a lot of gas businesses here, all of whom need people...
  19. cr0ft

    Surely a DIY install right?

    Heyup :) To be clear, I'm not blaming the punter. I just have my suspicions that he's done it himself to be honest, certainly didn't suggest that on the public forum though. This part of the forum is for us to discuss these sort of things privately :) On the public post I was very friendly...
  20. cr0ft

    Surely a DIY install right?

    If it was a plumber who fitted that they are pretty green!! As I get older and more cynical I'm coming to the conclusion that the majority of the public simply don't want to pay enough to get a job done properly!
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