What is an aquastat

It's no mystery that an aquastat is a control that goes with a boiler. If what is an aquastat don't know much more about it than that, though, you have a lot of company. There seems to be confusion about exactly what an aquastat does, and especially about finding a replacement aquastat when one fails. An aquastat does the same thing as a thermostat.

Our team is growing! View current openings and apply today. Read More. You are seeing this message because we have detected you are using Internet Explorer 10 or older to browse our site. Unfortunately, this means that your browser is too old to display our site properly and that certain areas of the site may display incorrectly or not at all. Furnaces have been around for a very long time, and have been one of the most popular heating systems available for most of that time.

What is an aquastat

An aquastat is a device used in hydronic heating systems for controlling water temperature. If the thermostat is calling for heat, the boiler will fire until the high limit is reached, then shut off even if the thermostat is still calling for heat. The boiler will re-fire if the boiler water temperature drops below a range around the high limit. The high limit exists for the sake of efficiency and safety. The boiler will also fire regardless of thermostat state when the boiler water temperature goes below a range around the low limit, ensuring that the boiler water temperature remains above a certain point. The low limit is intended for tankless domestic hot water; it ensures that boiler water is always warm enough to heat the domestic hot water. This technology-related article is a stub. You can help Wikipedia by expanding it. Contents move to sidebar hide. Article Talk. Read Edit View history. Tools Tools. Download as PDF Printable version. For other uses, see Aquastat disambiguation.

Low what is an aquastat - If the water temperature drops to this point, the aquastat will bring on the burner to heat the water, even if there's no call for heat from the room thermostat. SPDT - The switching action of a few aquastats allows you to control two things at once.

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An aquastat relay is a combination of three controls. As its name suggests, it's an aquastat, a relay and a transformer. All three components are mounted together in what looks like a gray painted brick, with a skinny copper cigar hanging out of the back on a very thin copper tube. The cigar is the temperature-sensing element of the aquastat. The purpose of the aquastat relay is to provide a place for most of the controls in a boiler system to be wired together. These are called terminal screws. The label tells you what to wire in there. For example, the T-T terminals are where you'd connect the two wires from the thermostat. The C terminals are for the circulator.

What is an aquastat

It's no mystery that an aquastat is a control that goes with a boiler. If you don't know much more about it than that, though, you have a lot of company. There seems to be confusion about exactly what an aquastat does, and especially about finding a replacement aquastat when one fails. An aquastat does the same thing as a thermostat. But an aquastat senses and controls water temperature, whereas a thermostat does air. In hydronic heating we use both - the aquastat to control boiler water temperature, and the thermostat to control room temperature. There are two parts to the word - "aqua" and "stat. Stat means switch. An aquastat is just a switch that turns the boiler on and off to maintain the right water temperature.

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What Does An Aquastat Do? But an aquastat senses and controls water temperature, whereas a thermostat does air. You can help Wikipedia by expanding it. The Aquastat An aquastat is a device installed in hydronic water systems for the purpose of controlling temperature within the boiler. For this reason, the aquastat shuts off the boiler when it reaches the high temperature limit. SPDT - The switching action of a few aquastats allows you to control two things at once. But why have a separate control for each function when you could have them all in one? The difference is that in the bulb is an electronic thermister. The low temperature limit is meant to keep the water supply temperature from dropping too low. Carol Fey Published on July 16, Comments. Heating, ventilation, and air conditioning. When the water temperature reaches the low limit, the aquastat starts the boiler up again to raise the water temperature. High limit, low limit and circulator control are all separate functions of single-function aquastats. Home Heating. There are two settings in every aquastat, a high setting and a low setting.

The Aquastat controllers from Resideo are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required. These controllers come in a variety of sizes and ranges for applications that utilize existing wells.

Would you like to learn more from Carol Fey? When you look inside the controller, you can see that there actually is one of each control. Toggle limited content width. What Does An Aquastat Do? That may happen because the aquastat that comes with the boiler has a part number unique to that boiler manufacturer. Unfortunately, this means that your browser is too old to display our site properly and that certain areas of the site may display incorrectly or not at all. In the winter, the thermostat "makes" on temperature fall. When the water temperature reaches the low limit, the aquastat starts the boiler up again to raise the water temperature. Read Edit View history. Hidden categories: Articles needing additional references from February All articles needing additional references All stub articles. This has led homeowners to gain at least a little bit of basic knowledge about the various parts of the furnace and their roles.