011 e-HM SERIES Benefits • Limited footprint, compact design • Cheap installation and low maintenance cost • Silent operation • Constant pressure system • Alternating VFD on both pumps • 1~phase 230VAC motor output of drive • Possible “manual bypass” in case of share VFD failure • Retrofit of existing installations • Automatic Restart / Reset function in case of failure Click to view the e-HM gallery Your e- HM™ solution Applications • Residential / light commercial pressurization systems • Gardening • Small Irrigation systems • Water supply Energy saving A pump uses most energy when it’s at full speed. Less speed means less energy. The relationship between changes in speed and changes in head, flow and power consumption comes under the affinity law. If you reduce the speed by 50%, power consumption is reduced by a massive 82.5%! Our pumps only run at full speed when absolutely necessary, so saving huge amounts of energy compared to a fixed speed pump running in on/off mode. Stable temperature In an on/off system the cold water is stored in a tank and is slowly heated to the room temperature. In constant pressure systems, fresh cold water is pumped into the system as soon as you open a tap, keeping the water at your desired temperature at all times. No water hamer Water hammer is the ‘bang’ sound in the pipes when a pump stops suddenly. A speed-controlled pump stops slowly eliminating ‘water hammer’ noise while preserving the system.
Xylem Greater Asia in Action - Digital Publication
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