CPE2 Pressure Equipment
4/5
- Operating principle Hydro-pneumatic pressure equipment consisting of two electric pumps, controlled by an ESPA ECD start-up system with digital regulation by means of a pressure transducer, for pressurised water supply. The pressure in the installation is measured in real time by means of a transducer connected to the discharge manifold. Depending on the pressure reading, the pump start command is managed at constant speed. Once a pressure value above the start pressure plus a preset differential has been reached, the electric pump is commanded to stop. If the pressure value drops below a preset differential pressure when one of the pumps is running, the second pump is commanded to start in cascade. The pumps are started in alternation for a better distribution of the operating hours. The ESPA ECD controller is capable of managing the operation of the two pumps. For correct operation of the equipment, a hydropneumatic accumulator of an adequate volume is required to minimise the number of motor starts and stops. In case of failure of the pressure transducer control system, the ESPA ECD controller has the possibility of working by means of pressure switches, which are not included in the supply.
- Equipment configuration Hydraulics The system consists of two electric pumps mounted on a baseplate. A stainless steel non-return valve and a shut-off valve are mounted on the discharge side of the pumps, in that order. The delivery columns are connected to the stainless steel delivery manifold. The discharge manifold has an outlet with an isolation shut-off valve for the installation of the hydro-pneumatic accumulator. The transducer, which is wired to the ESPA ECD controller, is placed in the same discharge manifold. Electrical part The CPE2 and CPE2M series units consist of an ESPA ECD controller. The CPE2 units are supplied with an electrical cabinet that incorporates a circuit breaker per pump for power line protection. In case of failure of one of the pumps, it can be isolated and the rest of the equipment can continue working without any risk to the installation. It is recommended to install an independent line protected by a circuit breaker in the main power supply panel. The ESPA ECD controller is able to control the operation and protection of the two pumps in the unit.
- Pump type Multicellularpump in vertical execution (MULTI).
- Characteristics Maximum flow rate: up to 28 m3 /h in single-phase units and up to 36 m3 /h in three-phase units. Maximum head: up to 90 mca. Maximum pump power: 4 kW. Fluid to be pumped: cold sanitary water, water for irrigation, water transfer. Maximum liquid temperature: 40 °C.
