TRV's - Why ?
- Thread starter Estrella
- Start date
TRVs are more efficient because they support a more controlled distribution of heat, and tend to result in less fuel being used.
The only safety concern would be if the following conditions all coincided:-
1. Closed system and boiler pressure relief valve faulty.
2. No open bypass or bypass closed or auto-bypass faulty.
3. CH demand present.
4. DHW demand not present.
5. All rad valves shut (at least one end).
The only safety concern would be if the following conditions all coincided:-
1. Closed system and boiler pressure relief valve faulty.
2. No open bypass or bypass closed or auto-bypass faulty.
3. CH demand present.
4. DHW demand not present.
5. All rad valves shut (at least one end).
you mean left on, don't you
That isn't anything like what I meant.what he means is: leave at least one rad with out a trv and permanently left of to work as a bypass for the pump chould all the ither trv's close during central heating operation.
Well spotted.
The main point of TRVs is that they are comfort controls, i.e., they reduce the heat flow into the radiator as the room reaches the temperature set on the TRV. Without them, it was common for some rooms to get excessively hot and people could only reduce the room temperature by shtting down the manual rad valve and/or opening windows. I can recall this being regularly done before TRVs became commonplace.
The room temperature thermostat is located in one room (commonly the hall) which is taken as being representative of the entire building. The room with the thermostat should be the one with no TRV on the rad(s). In reality some rooms will be warmer and some cooler. TRVs allow room-by-room control, rather than accurate control in one room, with no other room having effective control of the heating.
The room temperature thermostat is located in one room (commonly the hall) which is taken as being representative of the entire building. The room with the thermostat should be the one with no TRV on the rad(s). In reality some rooms will be warmer and some cooler. TRVs allow room-by-room control, rather than accurate control in one room, with no other room having effective control of the heating.
You see that just underlines the pointlessness of TRV's in my situation.
I live in a bloody cold stone cottage in north wales. I can assure you the TRV's are never ever at anything other than max because anything less is like living in the antartic. I also dont have a thermostat, so that doesnt apply.
The main reason for asking is that some of the TRV's are a bit old and replacing them with normal valves(excuse the terminology) is cheaper than TRV's.
I live in a bloody cold stone cottage in north wales. I can assure you the TRV's are never ever at anything other than max because anything less is like living in the antartic. I also dont have a thermostat, so that doesnt apply.
The main reason for asking is that some of the TRV's are a bit old and replacing them with normal valves(excuse the terminology) is cheaper than TRV's.
B
BigBurner
Not so. The hall is chosen because it is the coolest room in the house, and the rad should be sized and balanced to suit. When the hall is up to temperature, the rest of the house should be up to temperature before the hall.
The hall is not "representative of the entire building", at all. Far from it.
B
BigBurner
6. Boiler thermostat faulty
7. Overheat stat/sensor faulty
Then the pressure vessel will blow. The last line of safety of a pressurised system/combi boiler.
I don't agree
you are really acting as your own thermostat.
When it's cold, you turn the heating on. When its not so cold, you turn it off.
when it's not really very cold, you have to make up your mind what to do, and turn them on and off until you feel about right.
when spring comes, sometimes you turn it on, and sometimes (due to your wrongly-set TRVs) you are putting heat into rooms when they don't need it.
there is no point in setting TRVs to "Max", it doesn't put any more heat out than if you set them to 18C or whatever the temperature is that you feel comfortable at.
A thermostat would just save you getting out of your armchair or bed and turning the heat on or off yourself.
you don't need new valves, you need a whole new system. this one is unsersized, poorly designed, poorly installed and poorly maintained by the sound of it. i am presuming that by: " a bit old" you mean: valves are not working properly or leaking
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