However with the modulating boiler there are two methods of control, a modulating wall thermostat typically OpenTherm, or the TRV heads. There are two main types of boiler, on/off which is what I have now, and modulating which most gas boilers are, with the on/off one could control the home with a single wall thermostat with the lock shield valves set so each room gets a proportion of the heat. Not sorted out as flat rarely used in Winter. The TRV's in the main house with exception of the toilet are programmed, and control the rooms again in the main two settings eco and comfort, and either with phone, or pressing button on the TRV we can toggle between the two settings.ĭown below main house the flat is rarely used, and the wall thermostat is in the wrong place, being in the kitchen near to boiler and cooker so would be affected by heat from them, in real terms no more than a switch, if the flat should get cold enough for water to freeze it would turn on the pump, motorised valve, and radiators, but if we use the flat in winter it allows us to turn on radiators, but all radiators also have TRV's fitted so rooms will not over heat, but a bit of a Heath Robinson affair. Main idea is as summer approaches then wall thermostat stops the boiler cycling off/on all the time. The TRV in the hall where the main wall thermostat is, has to be set to compliment the wall thermostat, so this also turns up and down at the same times as the wall thermostat, they are set to work together, in winter the wall thermostat will rarely switch off as the TRV controls hall temperature to just below the point when it would switch off. The wall thermostats are there to turn off the pumps, motorised valves and boiler when the ambient temperature is high enough not to need the boiler, however one is also used to turn down heating at night, and to auto turn between comfort and eco settings as our mobile phones get closer or further away from the house, so it doubles as a programmer, and also controls domestic hot water. Starting at the boiler this sets the temperature of the circulating water, needs to be over 60✬ to ensure no legionnaires, more likely 70✬ to allow for pipes to cool. There are 9 electronic thermostatic radiator valves (TRV) and a further 5 mechanical TRV's plus two wall thermostats, and a boiler thermostat. On my central heating system there are around 17 thermostats. The housing just paid for a new boiler so they wont do any other work as it will cost them more. To them if the boiler wasn't working at all I had very low water pressure then they would do something. The plumber said snice your on the top floor your getting slightly low water pressure he said call your housing see what they say about the water pump on the roof if they can fix the issue but they wont do anything as they dont touch that and as long as my boiler is working im getting hot water and heating. My boiler has slightly low water but working good i get 0.6 on standby mode and sometimes get f22 which i just press the ignition button then back to normal or I re pressurise it if nothing works. Its a good insite to know how your boiler works some people like me thinking why combi boiler comes on sometimes when not in use if theres a problem with it or anything else until i did some research thanks for all the info you given me. No problem its was just a learning kerb some things we think is a problem but really isn't a problem until we do our research.
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