What is an aquastat controller?
An aquastat is a device installed in hydronic water systems for the purpose of controlling temperature within the boiler. An aquastat is similar to the furnace limit switch in operation, maintaining a safe operating temperature for the central heating unit.
How does an aquastat work on a boiler?
The aquastat monitors the water temperature in the boiler through the use of a copper bulb that stays in contact with the water inside the boiler and that shuts down the boiler automatically if the low- or high-temperature set point is exceeded.
What should HIGH LOW be set on boiler?
Rule of Thumb for Setting HI LO DIFF on an Aquastat
- HI to 180 °F (should be 200F or lower) a HI-DIFF value is hard-wired in the R8182 series type aquastats, is not adjustable, and no control dial is provided.
- LO to 160 °F (must be 20 below HI)
How does thermostat control boiler?
The thermostat prevents the cylinder becoming hotter than it needs to be. Once the water has reached the set temperature, the heat supply from the boiler will be turned off. Turning the thermostat higher will not make the water heat up any faster.
How do boiler controls work?
It uses a sensor to monitor the temperature of your home, and consequently it keeps an eye on what your boiler is up to. If your room thermostat senses that your home has reached its target temperature, it will switch the central heating off. Once the temperature drops, it’ll fire up the boiler again.
How do you test a boiler control?
To test the high-limit control, disconnect the power to the boiler controls and place a test lead across the terminals of the operating control. Check the setting of the high-limit control. Restore power to the controls and fire the boiler.
What is the best setting for my boiler?
As a rule, setting your heating control to 75 degrees should be sufficient to give you a perfectly warm house, while also allowing your boiler to run as economically as possible. Once this is set, you shouldn’t need to adjust it.