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Well guys the system is up and running and I am fine tunning the programmer and radiator settings to suit our requiremenmts. I checked for the nrv from the header tank and all is well. So I believe my sytem to be a vented type May i take this opportunity to thank you for the assistance given...

Hi Yes the pipe does go into the boiler top on lhs I did not notice any valves including NRV So it looks like you are correct. I am ok about the system pressure it has worked ok all these years with no cut outs etc Is this a problem? Should i look for a nrv or similar? If so it will need...

Hi Note the title change! The wireless thermostat is working fine. Been in the loft today there is a small green plastic header tank with a cold water supply about 15mm to a ball cock arrangement. there is an overflow to outside gutter there is also a larger pipe about 22mm which I think...

Hi I am sure the tank in the loft is connected. As I say it was part of the original installation in the 90s and nothing has changed and the system has worked like this forever. I will check tomorrow and let you know. But it seems all is well? There does not appear to be a pressure vessel...

We had the boiler installed in the late 90,s and I remember the chaps putting the new tank in the loft Thanks for the link to the handbook what is an open vent? The system has ran like this ever since the installation, so I am still perplexed. dave

oops my mistake and thanks again Now for phase 2 can you help - it is not electrical! My boiler is a Worcester Bosch 280RSF (discontinued in the 1990s) There is a feeder tank in the loft (only a small one) and I am not sure what it does The boiler when off shows no pressure on the pressure...

Just checked wiring and all looks ok so I swapped the black wire from the bottom terminal in x5 in the boiler and put it in the third one up. i left the second black wire alone in terminal 2 and the boiler now works on demand from the transmitter It also works on demand from the hot water tap...

HELP I connected the wiring up as discussed and got the transmitter talking to the the receiver. I increased the temp on the transmitter to get the boiler to fire up and nothing. The boiler works on demand from the hot water tap, so i must have done a connection wrong, but which one? i will...

All, Thank you for your kind assistance throughout, I will probably start the installation tomorrow, now i am clear on what is required dave

Hi again, Just received a Honeywell CMT927 and I have been checking it out with reference to your recent most helpful advice. Inside the receiver are six terminals A, B, C You mentioned using A & B for the existing black wires - good On the other side (lhs) there is N, L, L terminals I am...

Absolutely fantastic you are a hero and I owe you a pint I will leave the thread ope for a while until i get all the bits together many many thanks dave

WOW, great I almost understand it. many thanks but a couple of queries It would be my intention to replace the LP711 with the new receiver and keep the transmitter down stairs in a room as yet to be decided. So, 1) Could I take the earth from the existing fused unit and connect it to the...

HI Here we are again and thanks for the help so far. I switched off the fused unit next to the programmer LP711 and removed the 3Amp fuse. i removed 2 screws from the base of the programmer and lifted the unit off the wall. on the rear of the unit is a wiring diag corresponding to 6 terminals...

oops the other end of the five core cable comes direct from the programmer, i have not looked in there do you want me too and if so how? dave

Hi and many thanks for the quick reply The programmer make looks like ACL Lifestyle model LP711 I do not have a manual for this. I agree with your note on the green yellow being in two separate teminals wiring which is why i raised the point in the first place Is this dangerous at the...

Hi evryone and please help. I have an existing worcester 280rsf boiler that has worked fine for years and I want to install a remote wireless room thermostat (honeywell cm927 or similar) but I am unsure of the wiring. At the moment the boiler is either on or off and I want more control. The...