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hello Dave thanks for your help tony

round the by-pass,and up the vent, where else. the boiler tubes must still be dirty,another clean-out. i live in a very hard water area and have in the past refilled with softened water, is this a good or a bad thing :?:

hello yes the bypass circuit is big enough, correctly balanced and retested. you say the pump is timed, but to what, it runs for between 4 and 9 minutes, giving a temperature of any where between 76c and 73c. the system has been cleaned and refiled, but 30 to 45 minutes after shutdown there is...

hello thank you for your answer. can the overrun pump time be increased and how. tony

i need to lower the temperature at which the over-run pump cuts off, at the moment it is 76c ,which i think is too high, can this be adjusted on the user interface board. i have replaced the return thermister.

can this be agisted on the user interface board, i have already replaced the return thermistor. but it still cuts off at 76c which i think is too high

can this be done on the user face board tony

yes i have telephoned and sent an e-mail,but have had no success. it would seam the only way i can obtain an instruction leaflet is to purchase a new inter face board. £102.68 + vat. i don't think so.

i need the instructions to setup the user face board, ie. 4 pots. and 4 switches. i need to alter the pump over-run time and cut off tempreatur