Common terms referring to hot water pumps used to circulate hot water: Circulation pump; Circulating pump; ... (traditional tanks style water heater or energy efficient tankless water heaters) and by your plumbing layout (dedicated return line or dead end lines). Technical Bulletin -RUR98i/e Piping Diagrams and Pump Settings for 2-Unit Installations 2-Unit Dedicated Return Line In applications utilizing a dedicated return line: The tankless water heater WITHOUT a recirculation pump will be the FIRST unit feeding off the cold water supply line. A pump at the water heater moves hot water through the recirculation line. These pumps are often located near the water heater, however, they can be anywhere in the loop. A recirculating pump is typically used in pumping hot water directly from a central water heater through a hot-water pipeline, most often made of copper. SAVE ENERGY and SAVE WATER! The pump is pumping water in a recirculation loop. A recirculation line is a separate water pipe that runs off the hot-water line from the farthest plumbing fixture back to the water heater. Avoid long pipe run from the Tankless Water Heater to the Ariston / Bosch 300T Hot Water Heater. It is not to be used as an alternative to a professionally engineered project drawing. All controls and software are built into the product by Grundfos making installation simple. correctly for recirculation … The pump runs until a 103 degree temperature on the pump is reached (so all the cold water in the recirculation loop is delivered to the Tankless Water Heater). Homes that have on-demand or tankless water heaters, this is significant, since otherwise it would be a bit of a wait before the cold water clears out of the pipes and the hot water reaches you. Any Tankless Water Heater will work and we recommend using an Bosch 3000T - formely Ariston GL4 or GL6+. Residential Piping Diagrams Description Series Piping Diagram Tankless Water Heater System Design Manual 186965 001 Multiple Heater Piping for All Top Connecting Models 315268 000 Wiring Diagrams for Residential Water Heaters 315267 000 > A. O. Smith. The pump functionality allows the homeowner to only run the hot water recirculation pump when there is demand, saving thousands of gallons of water a year. The sensor keeps water temperature within an optimal range that is calculated every 12 hours. Using Tankless with a Recirculation Loop. Each of the bathroom and kitchen fixtures is on the loop. Insert a gasket into the female fitting on the recirculating pump and screw it onto the threads of the water heater discharge outlet. This drawing does not imply compliance with local building codes. Any cold water in the recirculation line is returned to the heater. Take the discharge line that had originally been connected to your water heater and screw onto the discharge outlet of the pump. Composite 3-Speed 100 Series Recirculating System. If using a tankless water heater, choose the system that can accommodate the pipe run length needed. At the same time, it returns (recirculates) the water that has now cooled back to the water heater for reheating. The pumps circulate water at low pressure and low speeds. Tankless Water Heater Installation Diagrams Tankless Installation / Optional Return Circulation °F PRIORITY POWER ON/OFF QQQ)QQQ This drawing is intended as a guide only. A hot water recirculating system can give you instant hot water, but you must mind some important safety tips! Languages. How use a Recirculation Pump for a Tankless Water Heater using an Ariston Mini Hot Water Tank. Follow this guide for proper installation of your recirculating hot water system. Use Teflon tape and tighten with a wrench. A hot water recirculating pump is convenient and adds comfort, as it means getting hot water faster when you turn on the hot tap. Combining a whole house tankless water heater like a Steibel Eltron Tempra Series with a small mini-tank water heater like the Stiebel Eltron SHC Mini-Tank offers the benefits of both worlds by saving on water heating costs, reducing water usage, and providing hot water instantly at every faucet in your home.