![]() Look at the use of three floats and an automatic alternator with lead-lag control in the starter panel. If you do not, there is no indication of a lead pump failure. The building management system (BMS) should treat this as an alarm condition. If you use a four-float system, your specification should require a pump run status contact closure to the BMS on the lag pump operation. Just as in the simplex system there will have to be some fast action. At that point, both the lead pump and the lag pump have failed to pump out the basin. The challenge with a simple four-float system comes with the annunciation of the alarm. Locate the lag pump float 6” below the alarm float. As a “rule of thumb” we suggest locating the alarm float 6” below the lowest inlet. The level changes with the depth of the basin. ![]() You may also wire the alarm float to a separate circuit, so it has the power to alarm if the circuit operating the pumps is inoperative or has failed.Īnother advantage of the four-float system is the ability to create a storage difference between the lag float and the alarm float. If there is an unusual surge load, both pumps will operate. Normally the pumps have an alternator that automatically switches which pump acts as the lead pump. They are: Pumps off – Lead pump on – Lag pump on – High-level alarm on. Many specifications we see require four floats. If we carry the same logic into the duplex system, we will require four floats. Once that alarm sounds or makes building management system (BMS) contact, something must happen right now. This simplex system would require three floats: Pump off – Pump on – high level alarm. A high-level alarm would indicate the failure of the pump to keep up with the load. The spacing of these are determined by the required volume to meet the minimum run time of the pump. In a larger simplex pumping system with larger storage, we require an on float and an off float. If the flow is very low, as in a residential sump, we could use a single float with an on-off range of a few inches. Simplex Sump & Sewage Control in Buildings The decision about control is about whether you want to use three or four floats in the basin of a duplex pump. This may result in a specification that is not clear resulting in poor or incorrect selections. I often see specifications that were clearly created by adding different recommendations to existing standard specifications. Sump and sewage specifications should be very simple. When the system is larger, we can still settle on the everyday pump control. In residential systems, a small fractional horsepower pump comes with a mounted on/off float switch and we do not even think about it. Get a Pump Service Estimate in NYC.Commercial and Institutional control of basin mounted sump and sewage pumps does not have to be complicated. We also offer a variety of pump maintenance plans and programs to keep you covered. We provide 24 Hour pump service as well as emergency pump service for many satisfied clients. Our onsite Pump Service Center ensures we can fabricate any materials needed to help repair or rebuild your broken pump, allowing us to provide quicker service. With NY Pump & Motor Repair, you are guaranteed minimal down time and a properly functioning pump by the time we are finished. Our certified pump repair technicians promptly arrive to inspect your pump, discover the problem, and fix any issues. It’s why building managers call NY Pump & Motor first.Īt NY Pump & Motor, we make it simple. ![]() We know the ins and outs of heating pumps, water booster pumps, sewage ejector pumps, and more. NY Pump & Motor offers professional pump repair service for residential, commercial, industrial, municipal, and institutional buildings.Īt NY Pump & Motor, we know pumps! We've been providing quality pump service in NYC and the tri-state area since 1941.įrom new pump installations to repairing pumps to rebuilding pumps to maintaining pumps, our professionals have the experience to handle all your pump needs. Sealed Lubricated Bearing Pump Motor ServiceĪre you looking for pump service in NYC? NY Pump & Motor has been providing pump service in NYC since 1941 with prompt service and great customer care.Three Phase Pump Motor 220v/460v Service.Single Phase Pump Motor 115v/230v Service.FDA Approved Metal Storage Tank Service.Return Condensate Stainless Steel Service.Variable Frequency Drives (VFD) Service.Triplex Ventilation Pump System Service.Simplex Ventilation Pump System Service.Triplex Sewage Ejector Pump System Service.Duplex Sewage Ejector Pump System Service.Simplex Sewage Ejector Pump System Service.Submersible High Temperature Pump Service.
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