High-rise buildings present multiple challenges for water distribution due to the high pressures required to reach the top of the building. The high pressures in the lower levels of the building cause high-pressure drops across Pressure Reducing Valves (PRVs), over 100 PSI or more, creating the potential for cavitation within the valves.
Pressure Reducing Valve (PRV) Stations are an important component of a water-distribution system in a commercial building. The 2015 Uniform Plumbing Code Section 608.2 states that PRVs are required at any point where the system static pressure exceeds 80 PSI. Typically, this applies to mid- and high-rise buildings when the pressure boost required at the ground floor to serve the upper floors in the building is over 80 PSI. When designing a PRV Station, you must consider the station pressure drop, water flow, and safety devices.
When powering on the Grundfos Magna3 Pump there are some basic settings that must be applied before initial use. The integral controller and onboard screen guides the user through each step and once complete the pump can be started in AutoAdapt Mode. To use the other control modes additional settings are required (links to Home Screen Set up, Constant Temperature Mode, Flow Limit).
The Grundfos Magna3 Pump packs all of Grundfos’ innovation into a small, intelligent circulator. The integrated controller, temperature & pressure sensors and communications capabilities make the Magna3 the ideal pump for hydronic loops and Domestic Hot Water Return applications.
Cougar USA’s mission is to make buildings work, so the people inside can do theirs. Over the last few months, this has become a personal mission of mine as well.
In November, my son Joey was born at Texas Children’s Hospital Pavilion for Women, and earlier this month had surgery in Legacy Tower to remove a benign cyst from his abdomen. Thanks to the amazing doctors and staff at TCH, Joey made a quick recovery – he definitely handled the surgery better than my wife Ashley and I did! After spending a few days recovering in West Tower, Joey was back smiling and being his happy self. Ashley and I feel very blessed that Joey’s case was minor compared to many families at Texas Children’s.
The Grundfos CR Pump utilizes a Cartridge Style Mechanical Seal, allowing for quick and easy maintenance. A crucial step in the seal kit change process is to set the gap height for the stack kit inside the pump housing when coupling to the motor. Proper spacing ensures the stack kit will not rub on the pump housing.
The Grundfos CR pump is ideal for Pressure Boosting applications. Like all centrifugal pumps, the CR cannot operate when air is trapped in the impellers. To eliminate air from the Pump, use the bleed screw on the top of the pump can, it may take several passes to clear all the air from the pump.
At Cougar USA we are proud to provide complete, tailored solutions for our customers. We have the technical knowledge and experience to identify their needs, wants and potential issues. We also help design, deliver and support a complete solution. Every day, Cougar supports Consulting Engineers, Installing Contractors and Building Engineers, especially after hours and weekends for emergencies. We continue to serve our customers long after the initial sale. This level of service and quality of products build trusting, long-term relationships with our customers and partners.
The System Enable & Disable Feature on the Grundfos CU352 Controller allows the Pump System to be shut down without having to power down. This is helpful when pump or system maintenance is required. We also recommend using this feature to disable the pumps anytime the power needs to be turned off. This protects the VFD’s and motors from losing power while under a load condition.