Performance Flow Rate Characteristics - Pentair FLECK 2910 NXT Installer Manual

Model without transformer
Warning
A switch or circuit-breaker must be included in the installation, it must be suitably located
and easily reached, it must be marked as the disconnecting device for the equipment.
Warning
The power must be achieved by a transformer in which the primary windings are separated
from the secondary windings by REINFORCED INSULATION, DOUBLE INSULATION, or a
screen connected to the PROTECTIVE CONDUCTOR TERMINAL.
Warning
It is required the installation of a fuse as overcurrent protection, it has to be positioned
between the system and the secondary of the transformer in the installation with the
following characteristics: V>= 30Vac, Imax=5.0A (ES. 5x20 5.0A)
Environmental conditions
• Indoor use only;
• temperature from 5°C to 40°C;
• maximum relative humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative
humidity at 40°C;
• mains supply voltage fluctuations up to ±10% of the nominal voltage.

3.1.1. Performance flow rate characteristics

The graph shows the pressure drop created by the valve itself at different flow rates. It allows to
predetermine the maximum flow rate going through the valve depending on the system settings (inlet
pressure etc). It also allows to determine the valve pressure drop at a given flow rate, and therefore
to evaluate the system pressure drop vs flow rate.
Ref. MKT-IM-002 / B - 23.05.2018
Installer Manual Fleck 2910 - NXT - Description
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