i've just added an extra radiator to my system can anyone tell me the correct amount to open the lock shield valve so it works properly and dosent mess up the rest of the rads in the house ,the other valve is a TRV.cheers.
2006-12-08 05:17:19 · 10 answers · asked by Anonymous in Home & Garden ➔ Do It Yourself (DIY)
Don't worry about this, just crack it open about half way, all this talk about ballancing the system is a lot of crap, i've been an engineer for 40 years and in all the systems i have seen installed i have never witnessed a plumber carry out a full ballance on a domestic system.
2006-12-08 06:25:42 · answer #1 · answered by Sparky 3 · 1⤊ 0⤋
Its all to do with temp.drop across the radiator if you want to set it up correctly,its about 30'f across the flow and return, but in general look at the radiator that you have just installed. If its only small then it may only require say 1/4 the amount of flow in comparison to the largest radiator. If its a postage stamp then just crack the L/S open a bit. 1/8 to 1/4 turn. If it is close to the boiler then again just crack it open otherwise it may short circuit the rest of the system, if its at the far end of the house as above plus a bit extra to accommodate the hydraulic resistance.
2006-12-08 06:15:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Got to agree with Dennis A.
I've been doing HVAC work for 28 years and have never seen a residential system balanced or had to balance one. If the rads are sized properly to the room load and the boiler is sized properly, you will probably just leave it wide open. Most of the time I even find balancing valves in large commercial buildings wide open and not balanced.
Nothing like practical field experience over book work anytime and I've been thru most of the engineering.
2006-12-08 08:25:25 · answer #3 · answered by Obsean 5 · 1⤊ 0⤋
If it's close to the boiler/pump try it at about 1/2 -3/4 open, if it's a long way/ furthest try it fully open, it probably wont make a huge difference, if any, to the rest of the system. If you want perfection, you will need to start balancing from scratch, but I doubt if there's any need !!
2006-12-08 05:28:47 · answer #4 · answered by jayktee96 7 · 1⤊ 0⤋
Make sure it is well bled, then with the TRV fully open (set to hot) open the lockshield 1/2 a turn, see what happens..leave for 1/2 hour....then check all rads, then, if all others ok, but new one a bit cold, open more.... softly, softly catchee monkey.....
2006-12-09 21:24:18 · answer #5 · answered by johncob 5 · 0⤊ 0⤋
Open your valve, the only 'balancing' problem with radiators is air in the lines, be sure to vent properly. The only other rare problem is dissimilar metals in the piping.
2006-12-08 15:09:52 · answer #6 · answered by Anonymous · 1⤊ 0⤋
I don,t continually drain down cos some systems have not got a handy drain **** and its a soreness to replenish lower back on an older equipment. If its a pressurised equipment then drop the strain , %. around the pipe area with polythene and cloths then use a pipe cutter to decrease the pipe, quickly slip on a push extra healthy end cap.interest finished!!
2016-12-30 03:39:45 · answer #7 · answered by ? 3 · 0⤊ 0⤋
Fully open and a smidge of a turn back- this is for later on when you want to turn it again.
2006-12-08 06:01:36 · answer #8 · answered by Phil C 3 · 0⤊ 0⤋
Sorry no - just couldn't help answering a question that ended in only!
2006-12-08 05:26:20 · answer #9 · answered by kimbridge 4 · 0⤊ 1⤋
fully open is A okay
2006-12-08 05:31:31 · answer #10 · answered by barrie s 3 · 0⤊ 0⤋