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Hi all.
I have a large house (ex commercial building)
It's heated by 2x Clyde Combustion CM-1 boilers rated at 220,000 btu each.
When the whole building is being heated, they work fine (although the fuel oil bill is ruinous)
My problem is - 70% of the building is currently being renovated and the rads are all turned off in that section, meaning the boilers are vastly over-sized for the rest of the building.
What is happening is - the boiler(s) light and the boiler temperature increases so fast that the temperature 'overshoots' the set temperature - to the point where the over-temp stat trips. This is obviously happening because the boiler stat can't react quickly enough to the changing temperature. The dual thermostat is in a brass pocket on the top of the boiler, meaning there is an air gap between the water in the boiler and the actual thermostat sensor.
So - my question is - is there a better thermostat I could fit (the current one is probably 30 years old), or should I fill the pocket with some sort of thermal compound that will more effectively thermally connect the water with the thermostat?
The only way I can keep the heating on at the moment is to set the boiler temp at about 65 degrees. That means that it has to cool down to effectively stone cold before it fires up again meaning luke warm radiators and no hot water (warm at best)
I have a large house (ex commercial building)
It's heated by 2x Clyde Combustion CM-1 boilers rated at 220,000 btu each.
When the whole building is being heated, they work fine (although the fuel oil bill is ruinous)
My problem is - 70% of the building is currently being renovated and the rads are all turned off in that section, meaning the boilers are vastly over-sized for the rest of the building.
What is happening is - the boiler(s) light and the boiler temperature increases so fast that the temperature 'overshoots' the set temperature - to the point where the over-temp stat trips. This is obviously happening because the boiler stat can't react quickly enough to the changing temperature. The dual thermostat is in a brass pocket on the top of the boiler, meaning there is an air gap between the water in the boiler and the actual thermostat sensor.
So - my question is - is there a better thermostat I could fit (the current one is probably 30 years old), or should I fill the pocket with some sort of thermal compound that will more effectively thermally connect the water with the thermostat?
The only way I can keep the heating on at the moment is to set the boiler temp at about 65 degrees. That means that it has to cool down to effectively stone cold before it fires up again meaning luke warm radiators and no hot water (warm at best)