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I have a problem which may be completely unrelated to boiler, however I have tried most things not to do with boiler so I need some help understanding the boiler so I can cure the problem.
So problem, a downstairs room is being used as a bedroom for my mother 92 and the radiator is about the furthest from boiler, because downstairs if the system is turned off at night, her room gets too cold, however left running overnight and her room is too warm, I want room at around 20°C when she goes to bed, dropping to around 17°C over night and back up to 20°C in the morning.
My wife and I live upstairs and also want a reasonable temperature, but it's the one downstairs room which is really important.
So we have a thermostat in the hall, with a rather large radiator and a TRV fitted, from the hall we have stairs, bedroom, living room, kitchen and wet room. Both wet room and kitchen heated with towel rails, plus electric under floor heating in the wet room, used on Friday night and Tuesday night only. The bedroom and living room both have eTRV's fitted, set to allow rooms to cool over night to 16°C and back to 19°C living room and 20°C bedroom in the morning.
However the rooms are not warming up fast enough in the morning, the whole central heating is set to switch off at 4 am and back on at 6:40 am with the eTRV changing at 6:30 am so boiler should start 10 minutes after the valves have opened, so in theory the two radiators should warm up in plenty of time. In practice however the rooms are not warming up quick enough.
Now my plan was assuming hot water from boiler at 6:30 am however if any anti-cycle software was to cause the boiler to be switching off again then that could be causing the radiators delay in heating, I note there is an external by-pass valve, but also it seems the boiler has an internal by-pass valve is this correct?
The hall radiator is throttled back on the lock shield valve to try to both delay it warming up and push more water through the bedroom radiator where the by-pass valve is fully open. The bedroom radiator is rarely very hot. The TRV on the hall radiator set to 2.5 is to stop the hall radiator getting too hot, the thermostat set to 17.5°C and a thermometer stuck to it shows 17.6 to 18.3°C when heating is running, don't really want hall any hotter, doors to all rooms are kept closed at night.
It would seem the radiator in the bedroom and living room are simply not getting enough hot water, the valves can be heard opening and closing, but often the radiators are only tepid, if the boiler is cycling then the hall radiator may heat up the hall thermostat before the other two rooms have had chance to get warm. Hall radiator is rather big, so once hot it takes a long time to cool again.
So can some one explain the anti-cycle software built into the boiler? One thought is a programmable wireless thermostat in the kitchen in parallel with the one in the hall, set to run 7 am to 9 am before we get up and use kitchen it would not be effected by cooking and could maybe be used to ensure boiler is running, already wired in and sitting in living room but set to frost only so not active.
So problem, a downstairs room is being used as a bedroom for my mother 92 and the radiator is about the furthest from boiler, because downstairs if the system is turned off at night, her room gets too cold, however left running overnight and her room is too warm, I want room at around 20°C when she goes to bed, dropping to around 17°C over night and back up to 20°C in the morning.
My wife and I live upstairs and also want a reasonable temperature, but it's the one downstairs room which is really important.
So we have a thermostat in the hall, with a rather large radiator and a TRV fitted, from the hall we have stairs, bedroom, living room, kitchen and wet room. Both wet room and kitchen heated with towel rails, plus electric under floor heating in the wet room, used on Friday night and Tuesday night only. The bedroom and living room both have eTRV's fitted, set to allow rooms to cool over night to 16°C and back to 19°C living room and 20°C bedroom in the morning.
However the rooms are not warming up fast enough in the morning, the whole central heating is set to switch off at 4 am and back on at 6:40 am with the eTRV changing at 6:30 am so boiler should start 10 minutes after the valves have opened, so in theory the two radiators should warm up in plenty of time. In practice however the rooms are not warming up quick enough.
Now my plan was assuming hot water from boiler at 6:30 am however if any anti-cycle software was to cause the boiler to be switching off again then that could be causing the radiators delay in heating, I note there is an external by-pass valve, but also it seems the boiler has an internal by-pass valve is this correct?
The hall radiator is throttled back on the lock shield valve to try to both delay it warming up and push more water through the bedroom radiator where the by-pass valve is fully open. The bedroom radiator is rarely very hot. The TRV on the hall radiator set to 2.5 is to stop the hall radiator getting too hot, the thermostat set to 17.5°C and a thermometer stuck to it shows 17.6 to 18.3°C when heating is running, don't really want hall any hotter, doors to all rooms are kept closed at night.
It would seem the radiator in the bedroom and living room are simply not getting enough hot water, the valves can be heard opening and closing, but often the radiators are only tepid, if the boiler is cycling then the hall radiator may heat up the hall thermostat before the other two rooms have had chance to get warm. Hall radiator is rather big, so once hot it takes a long time to cool again.
So can some one explain the anti-cycle software built into the boiler? One thought is a programmable wireless thermostat in the kitchen in parallel with the one in the hall, set to run 7 am to 9 am before we get up and use kitchen it would not be effected by cooking and could maybe be used to ensure boiler is running, already wired in and sitting in living room but set to frost only so not active.