VASCO - Variable Speed Controller
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VAriableSpeedCOntroller Variable speed controller for pumps

VASCO - VAriable Speed Controller is a purpose-built family of variable frequency drives, designed to control and protect pumping systems based on changing pump speed. Maximum compactness VASCO - VAriable Speed Controller units are extremely compact and, connected to any pump on the market, will manage the operation of the pump to maintain a constant desired physical dimension (such as pressure, flow, temperature or other). The pumping system runs only at the speed necessary to meet the user’s requirements, ensuring energy savings and extending the life of the system. The device also...

From water supply for domestic, irrigation, commercial and industrial applications, to heating and air conditioning, from filtering to pressure washing, the VASCO - VAriable Speed COntroller range perfectly fits any new or existing application ensuring: ■ energy and cost saving ■ longevity of pumping system | simplified installation | greater reliability The compact body is constructed entirely of aluminium, making he device extremely solid, lightweight and easily cooled, adding to the unit’s versatility. The IP55 degree of protection makes it possible to install the device virtually...

When first powering the device, a quick initial wizard is required for complete configuration of the drive. Additional parameters can be configured later by entering three different setting levels: ■ End user level. The only level which can be accessed without a password. It allows the user to monitor electrical and hydraulic parameters and the status of the inverter and pump. ■ Installer level. In this level the installer can configure the pump system to the characteristics of the hydraulic system. A password is required. ■ Advanced level. This level allows the electrical configuration of...

It can be installed directly on the motor or directly to the wall with a supplied installation kit Motor kit The inverter is cooled by the motor cooling fan. Motor kit consists of 4 special clamps (or flange adapter) to secure the device to the motor fan cover (or motor feet). Wall kit The unit is cooled by an external cooling fan attached to the inverter radiator. A special metal bracket is supplied for device to be mounted on the wall.

Software implemented in each drive of VASCO - VAriable Speed COntroller range is the result of a long-time experience in solving customer requests and constantly following new drive applications. Minimum motor frequency This parameter prevents motor operation below a certain frequency, thus avoiding damage to the thrust bearing of the submersible motors. Ramp down time Ramp up time Minimum motor frequency ramp Stop delay Control ramp Motor can accelerate from 0 to the minimum motor frequency following a very fast ramp and then go through a slower ramp. Intelligent stop of pump at no flow...

Loss compensation proportional to the water flow If the pressure sensor is placed near the pump, with the increase in flow the pressure value at the furthest outlet is lower than the set pressure. It is possible to vary the set pressure in proportion to the frequency to compensate pressure loss in the pipes. Pressure sensor 4 bar Compensation (1 bar) Set value (3 bar) Min. mot. freq. Dry running alarm via cosphi value If the pump runs dry, its cosphi value drops below a settable cosphi value, and the inverter stops the pump after 3 seconds. The device will try to make 5 attempts every 10,...

In addition to constant pressure control, VASCO - VAriable Speed COntroller allows other control modes such as fixed frequency, constant flow, constant temperature. Constant pressure The inverter controls the pump speed to maintain constant pressure at a set point independent of the water demand in the system. In a hydraulic system equipped with inverter, the standard pressure tank is replaced by a smaller tank which functions to maintain the set pressure in the system when the pump is stopped. Inverter Pump No return valve Pressure tank 5 Valve 6 Pressure transducer 7 Power supply Constant...

Constant temperature The control method at constant temperature is used to maintain the temperature of the pumped fluid to vary the thermal load. This control system is used in air conditioning or refrigeration and cooling towers. In this latter case, for example, the temperature measured by a sensor in the return water is kept constant. External frequency In some application, it is chosen to change the frequency of the pump by using an external signal coming from a trimmer or a PLC. In this case, after selecting the External Frequency control mode, it is enough to connect an input signal...

Unmatched user experience Thanks to Nastec NOW app it is possible to communicate with all Nastec SMART Bluetooth® devices in order to: ■ Monitor multiple operating parameters simultaneously on the wide, high definition, coloured screen of your smartphone or tablet. ■ Get energy consumption statistics and check the alarm log. H Develop programs, save them in the archive, copy them to other devices and share them among multiple users. H Create reports with the possibility of adding notes and images, and email or store them in the digital archive. ■ Remotely control a Nastec device via Wi-Fi...

1 inverter + 1 or 2 DOL pumps A first method of splitting consists of installing one pump driven by the inverter and 1 or 2 DOL pumps directly connected to the main power (Direct On Line). Inverter switches the 1 or 2 DOL pumps on/off through contactors. Inverter alternates the two DOL pumps to average pump wear. From 1 to 8 inverters in COMBO connection A second way of splitting (named COMBO) consists of using several pumps in parallel (up to 8) each driven by an inverter. In this way, efficiency and the reliability of the pump group is maximised. From 1 to 8 inverters + 1 or 2 DOL pumps...

VASCO - VAriable Speed COntroller, in addition to other control modes, performs the operation at constant differential pressure by using a differential pressure sensor or using 2 pressure sensors installed in the suction and delivery sides of the pump. Difference value is calculated by the inverter itself from the two values read. This solution enables significant cost savings as well as providing protection against cavitation (by setting a minimum alarm pressure on the suction side) and against overpressure (by setting a maximum pressure alarm on the delivery side). Constant differential...