Do I have to switch the system to off before I carry out the above - never quite sure.
2007-03-23 12:52:49 · 18 answers · asked by deep in thought 4 in Home & Garden ➔ Maintenance & Repairs
Yes, switch the system off before bleeding the rads, depending on the type of system you have the pump can actually suck air in through the open vent and cause more problems. Always have the pump off when bleeding.
2007-03-24 03:03:19 · answer #1 · answered by Anonymous · 0⤊ 1⤋
It is the best way to bleed rads by switching the boiler off and wait 10 minutes for any air in the system to settle at the top of the rads. While you bleed the rads, have someone to check the water pressure on the boiler, and top up as needed. When you bleed the rads let the water run out for about 10 seconds, then close the vent.
2007-03-24 02:57:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You can bleed the radiators in any order you want, with the heat running or not. All you're doing is drawing out trapped air at the top of each radiator.
The air is dissolved from the expansion tank which has an air space to cushion the expansion of water when the system gets hot. So what you bleed from the radiators was carried there from the expansion tank, which eventually loses all of its air. Then it has to be drained to admit a fresh charge of air. The expansion tank is a cylinder near the furnace.
2007-03-23 13:56:47 · answer #3 · answered by Anonymous · 0⤊ 0⤋
In my home we do that every autumn. It's a good idea. No, you do not have to shut your system down to do it. Think of it this way: when you turn that little key, all you are doing is draining out the extra air in the radiator until water begins to flow through the entire unit once again. You are making each radiator complete efficient again. Down in your basement, you would also be wise to drain off about five gallons from the tank down there, too, to get the rust or sediment out of it. You may have to ask someone else about that one, but as for the radiator units around your home, no. Just go and bring the bottle with you and hold it under the little nipple and let the air rush out and then all of a sudden the water will begin to come through the unit. I usually let it run for about ten seconds until I am sure it is steady and then I give the key a turn back tight to shut it off, and now it's time to go the next radiator. Good luck to you! Good job to get done. Best from, Chris in South Portland, Maine, U.S.A.
2007-03-23 13:31:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It is advisable but not necessary if only one rad being bled. Make sure though that you check the water levels after as you may need to open the inlet. there shold be a gage on the boiler. it needs to be between 1 and 3
2007-03-23 13:05:07 · answer #5 · answered by Miss RoZy 4 · 0⤊ 0⤋
yes you must always turn off your central heating before you bleed the radiators. you want the air to rise to the top not be churned around the system. Turn |It Off!!!
2007-03-23 13:07:03 · answer #6 · answered by the hood 4 · 0⤊ 0⤋
A heating engineer told me to bleed them when water is cold.
Hot water expands, so leaves space for air when cooling.
2007-03-23 13:10:50 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Bloody things I agree.................... Have the boiler on as the pump will push the air out. Start at the rad the farthest away from the boiler ie up stairs.
2007-03-23 13:00:51 · answer #8 · answered by Anonymous · 1⤊ 0⤋
I just switch off the heating on the timer when I do mine.
2007-03-23 12:56:01 · answer #9 · answered by Welshchick 7 · 0⤊ 0⤋
no you dont just make sure the heaters are not on it does'nt matter about your boiler,just put the key in intill the water starts to seep out a little then your done.x
2007-03-23 12:58:46 · answer #10 · answered by easty90210 5 · 0⤊ 0⤋