Greenstar 28i & rads over 35kbtu @60deg C + Isorad tails

[Gasguru]

The carp filling loop will be coming off just as soon as they have gone, I asked them for 2 sealing washered caps to put there instead. The ugly bit can go in a cupboard.

You're missing the point. The double check valve is supposed to go on the mains side to prevent back flow in compliance with Reg. 24.

Fitted on the heating side the double check valve often fails meaning when you disconnect the loop you have water at system pressure leaking back through the check valves, hence the majority of these loops remain connected in contravention of the regs and increasing the risk that the system pressure rises due to the filling valve letting by slightly (they are often very poor quality).

Proper loops have valves at each end of the loop (so you turn both off, remove the link and fit the protective end caps).

I suggest you ask them how they intend the installation to comply with the water regulations.

It pi**es me off thet merchants are permitted to sell this carp and installers then fit it to save a couple of quid.

Compare the figures in the benchmark with the figures quoted in the manufacturers instructions...really dumb installers copy the data exactly so it's very obvious they haven't done the calculations necessary. eg the gas rate.

 

[oldman2]

Your comments re the fill loop noted, I will ask when the boss comes for his payment.

Would one of these comply with water regs, if so it goes inside the boiler case doesnt it, getting rid of the carbunkle showing now below it.

View media item 3836
Not over expensive at around £12 delivered or are they prone to break or some other reason why they are not fitted by the installers?

The central heating mode burner working pressure was listed as 19mbar

In hot water mode the gas rate is listed as 105.88ft3/hr on the checklist

The boiler is a Greenstar 28i junior.

 

[Gasguru]

The books lists 106.6 ft/hr so close enough.

Beleive it or not most of these manufacturers filling links incorporated into the boiler don't actually comply.

The Worcester one is ok provided you are careful. Often the filling valve knob falls off and customers resort to using pliers to operate the spindle, eventually it's so chewed up the part requires replacement.

Providing the system is well installed and the system does not require frequent topping up they should be ok. However, the double check valve assembly is not "capped off" as in a proper link so any contamination of the valve seatings may result in leaks....so the filling keys get left in to prevent it.

I bet the installers are getting pi**ed off by now....a customer daring to question their work if more customers did so the cowboys wouldn't survive.

 

[oldman2]

I live in the South so paid what I consider to be a lot of money for this install, I was an industrial sparks for many years so can get my head around most technical stuff and if I had been allowed whould have done the install myself, just getting them in to do the corgi bit, but finding a plumber to do the install for under 5k was hard enough let alone find one to sort the boiler alone.

I am quite particular in what I will accept as good practice from any trades and yet again I was dissapointed by others not meeting my standards. I wonder sometimes if mine are too high, then I realise its just that they do what the customer lets them get away with.

They reluctantly refitted the .75mm cable shortened and following the cold feed path for neatness. The RF programmer was only set up after some badgering from me, them wishing to "leave that part to you"

4pm came (home time) and they were off like a shot, well nearly I suggested they might like to mastic around the gas pipes as per regs, do up the pipe clips they had forgotten, cut and blank the live 15mm cold main they still had rising through the floor where my airing cupboard used to be and would they like to show the customer the boiler controls etc....

I gave up with getting the main gas insulated where it runs right next to my 2.5mm ring main cable and suggested they leave the moving of heating pipes away from my ring main under the floor upstairs as it was just too hard, easier to do myself and know its right.

They left and I went round where they had been and found 3 builders buckets, one filled with murky water, some pipe clips and some bits of pipe. Not much of a last look around to make sure everythings ok there...

The next project is a kitchen extension, but I need a rest before that!

 

[oldman2]

Just to finish off I had to have them back twice, once to seal a gas leak at the meter where they cut in to get a supply for the boiler and again to seal a gas leak where they capped off the old kitchen boiler supply.

I also found that they had drilled through the floorboards upstairs with a 20mm tank cutter for a rad pipe to rise through and hit the iron gas supply pipe skidding off it eventually but not before leaving a series of steps in the pipe where the cutter was trying to get through it.

When I pointed this out to them they said "those steel pipes are quite thick, it will be fine"

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Hard to take a pic of it as the pipe is in the way and flash overexposes, zoom in to get the best view I guess, its a 1/2" steel pipe.