Question Posted October 11 Share Posted October 11 (edited) I have been trying to balance my radiators and found that most radiators first get hot on the lockshield side of the radiator. An engineer moved our boiler three years ago. I now believe he connected the supply pipe from the boiler to what was the return pipe and vice versa. Trying to correct this would involve moving the pump and changing the motorised valves, and costly. I think the easiest solution would be to make sure the radiators have bi-directional TRVs. Does this really matter and would checking the TRVs are bi directional be sufficient? (The engineer won't come back to sort this. On another matter, we got a defect notice issued against him by Gas Safe, and only then did he correct the fault, and I keep discovering other faults). Edited October 11 by Question Link to comment Share on other sites More sharing options...
marshian Posted October 11 Share Posted October 11 Does the water circulate thro the HW coil in reverse too?? Easy to check if TRV bodies are bi-directional they have a double headed arrow on them 1 Link to comment Share on other sites More sharing options...
Question Posted October 11 Author Share Posted October 11 1 hour ago, marshian said: Does the water circulate thro the HW coil in reverse too?? Easy to check if TRV bodies are bi-directional they have a double headed arrow on them 10 radiators are bi-directional, another Danfoss where the direction selector was put in the wrong direction (by the engineer I have already mentioned), and the two other radiators have no markings whatsoever. Any advice please. Link to comment Share on other sites More sharing options...
Question Posted October 11 Author Share Posted October 11 (edited) Now down to 1 radiator that does not have any markings on it and so I don't know whether it is bi-directional. all others are bi-directional. So can I forget about it. Water circulates fine through the Hot Water Coil. Edited October 11 by Question Link to comment Share on other sites More sharing options...
MrPotts Posted October 11 Share Posted October 11 Are the arrows pointing in the direction of flow ( lockshield and TRV body)? Link to comment Share on other sites More sharing options...
Question Posted October 11 Author Share Posted October 11 Just now, MrPotts said: Can you clarify what you mean please. I looked at the valve under the TRV head and saw two arrows, one pointing down towards the floor and the other pointing into radiator, i.e. they indicate opposite directions. Is there something else I need to do? Link to comment Share on other sites More sharing options...
MrPotts Posted October 11 Share Posted October 11 1 hour ago, Question said: Its not just the TRV body, you should also check that the arrows on the lockshield valves are also either bi-directional or if a single arrow then it is pointing in the direction of flow. Link to comment Share on other sites More sharing options...
Question Posted October 11 Author Share Posted October 11 17 minutes ago, MrPotts said: Its not just the TRV body, you should also check that the arrows on the lockshield valves are also either bi-directional or if a single arrow then it is pointing in the direction of flow. Are you saying that I should look at the lockshields at the other side of the radiator to where the TRVs are? I had a look at them and there are no arrows on any of them. Link to comment Share on other sites More sharing options...
MrPotts Posted October 11 Share Posted October 11 14 minutes ago, Question said: Are you saying that I should look at the lockshields at the other side of the radiator to where the TRVs are? I had a look at them and there are no arrows on any of them. Yes check the valve body on the opposite end to the TRV. I haven't seen valves without a direction of flow arrow but as yours don't have one then who knows which way around they are meant to be installed. Link to comment Share on other sites More sharing options...
Question Posted October 12 Author Share Posted October 12 10 hours ago, MrPotts said: Yes check the valve body on the opposite end to the TRV. I haven't seen valves without a direction of flow arrow but as yours don't have one then who knows which way around they are meant to be installed. Thank you. When I google images of lockshields, most don't have any arrows on them whereas TRV images do arrows. I also see a pair of valves that can be bought together, one TRV and the other lockshield, and it is only the TRV body that has arrows. Have you come across lockshields that are only good in one direction? Link to comment Share on other sites More sharing options...
MrPotts Posted October 12 Share Posted October 12 5 hours ago, Question said: Thank you. When I google images of lockshields, most don't have any arrows on them whereas TRV images do arrows. I also see a pair of valves that can be bought together, one TRV and the other lockshield, and it is only the TRV body that has arrows. Have you come across lockshields that are only good in one direction? Ignore me! Lock shield valves don’t always have direction of flow on them. Link to comment Share on other sites More sharing options...
marshian Posted October 12 Share Posted October 12 6 hours ago, MrPotts said: Ignore me! Lock shield valves don’t always have direction of flow on them. When it was all we had to control the flow thro the rads you had one at each end of the rad Link to comment Share on other sites More sharing options...
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