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Hydrovar Pump for Hydronic Heating System from Kelair
Hydrovars in control
Kelair was contacted by an engineering consultancy firm to assist with the selection of pumps for a hydronic heating system they were designing to provide temperature control within a new building development.
The system design required two pump sets - one for the heating water loop and one for the cooling water loop - with each pump set containing one duty and one standby pump. Both loops needed to have water supplied at a constant pressure but with the ability to automatically vary the flow rate according to the demand on the system.
These criteria clearly pointed us in the direction of a variable speed constant pressure pump system and based upon a multitude of excellent past experiences in constant pressure pumping applications, the Lowara / Vogel Hydrovar system was selected.
The Lowara / Vogel Hydrovar system combines a variable frequency drive with a dedicated pump controller, all in one compact unit that can be mounted to any standard motor or wall-mounted if required.
Each Hydrovar controller has features including an hoursrun meter; low-pressure shutdown; thermal protection and automatic alternation all within the Hydrovar head unit; as well as the ability to maintain a pressure to within 2% of the desired set pressure.
Both pump systems were supplied as skid-mounted packages complete with common suction and discharge manifolds containing isolation and non-return valves for each pump, and a surge protection panel to prevent damage to the Hydrovar controllers in the event of a power surge.
The surge-protection panels were fitted with a main power supply isolating switch; surge suppressors and separate circuit breakers for each Hydrovar unit; pump run and pump fail indicator lights and Volt-free contacts to enable connection to a Building Management System (BMS).
Kelair regularly builds constant pressure pump packages for a variety of applications including municipal water pressure boosting for subdivisions; domestic water supply for factories, hotels and holiday resorts and various mechanical services applications including heating systems and we can customise a system to suit most requirements.