Setting The Direction Of Rotation; Setting The Setpoint Pressure; System With Flow Sensor; System Without Flow Sensor - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

5.1.3

Setting the direction of rotation

Once the pump has started up, the user must ensure that the direction of rotation is correct (the direction
is usually indicated by an arrow on the pump casing). To start up the motor and check the direction of
rotation, simply switch on a utility.
From the same menu as RC (MODE SET – "Installer menu") press MODE and scroll through the menus
to RT. In these conditions, buttons + and – enable the user to invert the direction of motor rotation. The
function is also enabled when the motor is running.
If it is not possible to see the direction of motor rotation, proceed as follows:
Method to check rotation frequency
- Access parameter RT as described above.
- Turn on a utility and observe the frequency that is shown on the status bar at the bottom of the utility control
page, to ensure that the operating frequency is less than the rated frequency of the pump FN.
- Without changing collection, modify parameter RT by means of buttons + or – and check frequency FR again.
- The correct RT parameter is that which requires, compared to collection, a lower frequency FR.
5.1.4

Setting the setpoint pressure

From the main menu, press and hold MODE and SET simultaneously until "SP" appears on display. In
these conditions, buttons "+" and "–" enable respectively increase and decrease of the required pressure
value.
The regulation range depends on the sensor used.
Press SET to return to the main page.
5.1.5

System with flow sensor

From the installer menu (the same used to set RC, RT and FN) scroll through the parameters using
MODE to reach FI.
To work with the flow sensor set FI to 1. Use MODE to scroll through to the next parameter FD (pipeline
diameter) and set the diameter in inches of the pipe mounting the flow sensor.
Press SET to return to the main page.
5.1.6

System without flow sensor

From the installer menu (the same used to set RC RT and FN) scroll through the parameters using
MODE to display FI. To work without the flow sensor, set FI to 0 (default value).
Without the flow sensor, there are two flow reading modes, both settable on parameter FZ in the installer
menu.

Automatic (self-learning): the system automatically identifies the flow and automatically adjusts
settings accordingly. To set this operating mode, set FZ to 0.

Minimum frequency mode: in this mode the shutdown frequency is set at zero flow. To use this
mode, move to parameter FZ, close delivery gradually (to avoid generating overpressure) and
read the frequency value at which the inverter is stabilised. Set FZ at this value + 2.
Example: if the inverter stabilises at 35Hz, set FZ at 37.
An excessively low value of FZ can cause irreparable damage to the pumps, because in this case
the inverter would never stop the pumps.
An excessively high value of FZ can cause pump shutdown even when there is flow present.
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