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A condensate pump is a specific type of pump used to pump the condensate (water) produced in an HVAC (heating or cooling) or refrigeration system. They may be used to pump the condensate produced from latent water vapor in any of the following gas mixtures: Manual pump used to obtain water A pump is a mechanical device used to move liquids or gases. ...
Condensation is the change in phase of a substance to a denser phase, such as gas (or vapor) to a liquid. ...
Water (from the Old English word waeter; c. ...
HVAC (pronounced either H-V-A-C or, occasionally, H-VAK) is an initialism/acronym that stands for heating, ventilation and air-conditioning. This is sometimes referred to as climate control. ...
Refrigeration (from the Latin frigus, frost) is generally the cooling of a body by the transfer of a portion of its heat away from it. ...
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- conditioned (cooled) building air
- refrigerated air in cooling and freezing systems
- steam in heat exchangers and radiators
- the exhaust stream of very-high-efficiency furnaces
In physical chemistry and in engineering, steam refers to vaporized water. ...
A furnace is a device for heating air or any other fluid. ...
Construction and operation
Condensate pumps as used in hydronic systems are usually electrically-powered centrifugal pumps. As used in homes and individual heat exchangers, they are often small and rated at a fraction of a horsepower, but in commercial applications they range in size up to many horsepower and the electric motor is usually separated from the pump body by some form of mechanical coupling. Large industrial pumps may also serve as the feedwater pump for returning the condensate under pressure to a boiler. Manual pump used to obtain water A pump is a mechanical device used to move liquids or gases. ...
The horsepower (hp) is the name of several non-metric units of power. ...
Electric motors of various sizes. ...
A boiler feedwater pump is a specific type of pump used to pump water into a steam boiler. ...
Condensate pumps usually run intermittently and have a tank in which condensate can accumulate. Eventually, the accumulating liquid raises a float switch energizing the pump. The pump then runs until the level of liquid in the tank is substantially lowered. Some pumps contain a two-stage switch. As liquid rises to the trigger point of the first stage, the pump is activated. If the liquid continues to rise (perhaps because the pump has failed or its discharge is blocked), the second stage will be triggered. This stage may switch off the HVAC equipment (preventing the production of further condensate), trigger an alarm, or both.
Small pumps have tanks that range from 2 to 4 litres (0.5 to 1 gallon) and are usually supported using the flanges on their tanks or simply placed upon the floor. A plastic impeller in a molded volute at the bottom of the pump provides the pumping action; this impeller is connected to the motor via a metal shaft that extends downwards from the motor mounted above the tank's top. Large pumps are usually pad-mounted drawing liquid from a tank (sump) below the floor. The smallest pumps may have no tank at all and are simply placed within a container such as the drip pan of a dehumidifier appliance. A volute is a spiral scroll-like ornament such as that used on an Ionic capital. ...
A dehumidifier is a household appliance that reduces the level of humidity in a room. ...
The pump output The output of small condensate pumps is usually routed to a sewer, drain, or the outside world via PVCl plastic tubing. If the outlet of the line is at a higher level than the tank of the pump, a check valve is often fitted at the outlet of the pump so that liquid cannot flow backwards into the pump's tank. If the outlet is below the tank level, siphonage usually naturally clears the output line of all liquid when the pump is deenergized. In cold regions of the world, it is important that condensate lines that are exhausted outside be carefully designed so that no water can remain in the line to freeze up; this would block the line from further operation. Sewers transport wastewater from buildings to treatment facilities. ...
Polyvinyl chloride (PVC) is a widely-used plastic. ...
Plastic is a term that covers a range of synthetic or semisynthetic polymerization products. ...
this siamese clappered inlet allows one or two inputs into a deluge gun A check valve is a mechanical device, a valve, that normally allows fluid to flow through it in only one direction. ...
siphon principle A siphon is a continuous tube that allows liquid to drain from a reservoir through an intermediate point that is higher than the reservoir, the up-slope flow being driven only by hydrostatic pressure without any need for pumping. ...
In physics and chemistry, freezing is the process of cooling a liquid to the temperature (called freezing point) where it turns solid. ...
Condensate is not pure water. If it is being condensed from an air stream, it may have dust, microbes, or other contaminants in it. If it is condensed from steam, it may have traces of the various boiler water treatment chemicals. And if it is condensed from furnace exhaust gases, it may be acidic, containing sulfuric acid or nitric acid as a result of sulfur and nitrogen dioxides in the exhaust gas stream. Steam and exhaust condensate is usually hot. These various factors may combine (along with local regulations) to require careful handling or even treatment of the condensate and condensate pumps used for these services must be appropriately designed. After just three years of use dust has blocked this laptop heat sink, making the computer unusable Dust is a general name for minute solid particles with diameter less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. ...
A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). ...
It has been suggested that strong acid be merged into this article or section. ...
Sulfuric acid (British English: sulphuric acid), H2SO4, is a strong mineral acid. ...
R-phrases , S-phrases , , , , Flash point not applicable RTECS number QU5775000 Supplementary data page Structure and properties n, εr, etc. ...
Sulfur dioxide (or Sulphur dioxide) has the chemical formula SO2. ...
The chemical compound nitrogen dioxide (NO2) is a red or orange/brown gas with a characteristic sharp, biting odor. ...
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