Reduced build time and easier maintenance
High-rise apartments and commercial buildings require dedicated booster pump systems to ensure adequate water pressure on all floors. In recent years, controls for these plants have become increasingly sophisticated and efficient. While most integrators now use electronic sensors to supply pressure information, most still employ old-style conventional gauges for visual monitoring of pressure.
By replacing the existing traditional gauges with Danfoss MBD 1000 plug-in digital display units and MBS 3000 pressure transmitters, Cal Hydro has reduced assembly and test time, and made its systems easier to operate and maintain.
Ordinary dial-type pressure gauges are relatively inexpensive, but lack accuracy and repeatability of measurement from one to another. Gauges also require dedicated plumbing and frequent replacement. Once installed the gauge must be calibrated. If the numbers don’t match, the error will have to be accounted for in future field service or routine maintenance, adding needless time, complexity and cost.
The Danfoss solution replaces the gauge and its associated plumbing with the MBD 1000 coupled directly to the MBS 3000 transmitter, saving considerable build time and expense. Since the display unit is powered by the same DC voltage that feeds the transmitter, no additional wiring is required. The MBD 1000 display can be digitally adjusted to exactly match the controller reading. Because the display unit’s output is locked to the transmitter, accuracy is ensured across the full operating pressure range.
Additional advantages of the MBD 1000 are its programmability and mounting adaptability. The simple programming allows readings to be displayed in various units, such as PSI, bar, or kPA. The easily adjustable mounting allows the MBD 1000 to be pivoted for easy viewing.
The Danfoss transmitter and display “kit” solution cost California Hydronics little more to purchase than the combination of a competitor’s transmitter with a conventional gauge. Thanks to the simplified assembly, the actual installed cost is considerably less in comparison, not to mention the future service/maintenance cost savings.
By Harold Barcus
