Construction World February 2021

concern for our team members’ well-being when performing tasks in the immediate area,” she says. Energy efficient Collaborating with the Hilton Hotel to design and supply the optimal solution was Grundfos SA team leader building service Errol Dobson, and API Pumps Gauteng sales director Johan Truter. Dobson says the hotel’s previous system comprised components from a number of manufacturers. “This complicated the control, maintenance and monitoring functions,” he says. “The old pump set’s control system was also unreliable, with pumps having to be manually reset on a regular basis.” After their detailed site visit and in-depth discussions with the customer, Dobson and Truter recommended the Grundfos pump set, which would replace the old 22 kW motors with new energy-efficient 7,5 kW motors. By installing the new system, the total plant’s power demand was reduced from 74 kW to 30 kW. The Grundfos Hydro MPC-E maintains a constant pressure through continuous adjustment of the speed of the pumps. The system’s performance is therefore adapted to the demand through the pumps being cut in and out as required, and through parallel control of the pumps in operation. Constant pressure control is also ensured through the continuous variable adjustment of the speed of each individual pump. “Management at the Hilton Hotel wanted a reliable and energy efficient system with good backup support,” Dobson says. “Grundfos was also able to offer the customer a two and a half year extended

and sourced well in advance, as were the electrical componentry and cabling. Grundfos service engineer Marius van Wyk then undertook the commissioning of the pump set at the end of the day – completing a successful delivery to the customer. “In line with our commitment to quality customer service, we prepared a project documentation file and handed that over to the Hilton Hotel for ongoing reference,” he says. “This valuable documentation includes the original Grundfos pump set commissioning report, full Grundfos pump set datasheets and the certificate of compliance for electrical work done.” It also includes the original pump set factory test report, the full factory pump set wiring diagram and spare parts list, and the full installation and operating manual for the pump set. As part of the total solutions approach from Grundfos, a Service Level Agreement (SLA) was signed with the Hilton Hotel and will ensure the customer reaps the benefits of prolonged system life with predictable service and maintenance costs and well as lower total cost of ownership. ▄

warranty on the booster.” Quick installation

The installation and commissioning were carried out in June 2020, and completed in just one day, he says. This included the removal of the old pump set, and the installation of new pipework and electrical work by API Pumps Gauteng. All the necessary pipes were measured

Constant pressure is assured through continuous adjustment of the speed of the pumps.

Charmaine Spasojevic, Chief Engineer at the Hilton Hotel, in front of the Grundfos booster pump installation.

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CONSTRUCTION WORLD FEBRUARY 2021