Netafim NETAFLEX 3G, Руководство по установке

Страница: 20 / 32

20 NETAFLEX™ 3G INSTALLATION MANUAL
Check the system pump operation
CAUTION
Only qualified electricians are permitted to perform electrical installations and repairs!
Switch the system pump ON for a few seconds and check that it is rotating in the correct direction.
If the pump does not rotate in the correct direction - a qualified electrician should swap between
phases L1 and L3 (see the system pump Manual).
HIGH VOLTAGE ELECTRICAL HAZARD
Before unplugging the system from the main power source,
switch the unit and the main power source OFF!
Running the NetaFlex™ 3G
Define a program in the controller for one valve or multiple valves (shift) as defined by the irrigation plan
(see the Controller Manual).
In the first stage it is recommended that you define a program with quantitative or proportional fertigation
only, without EC/pH control (see the Controller Manual).
Temporarily deactivate all alarms in the system - EC/pH, flow control, etc. (see the controller manual).
Start the program and wait for the lines to be filled (this takes a few minutes, depending on the size of the
installation).
Check that the flow rate displayed on the controller's screen and the pressure at the system outlet
displayed on the pressure gauge are stabilized (see the Controller Manual).
Make sure flow rate and pressure are in range according to the performance curve of the relevant system
pump (see Sales Documentation, page 10).
If the system cannot reach the required flow rate and pressure, it is possible that there is
an air pocket in the system pump's impeller chamber:
Loosen the system pump's bleeding screw and wait until a stable flow, free of air bubbles,
is obtained, then retighten the bleeding screw (see the System Pump Manual).
Check the suction of the dosing channels from the stock tanks, and tune the desired flow
rate for each dosing channel by adjusting the needle valve (see Calibration of the dosing
unit while irrigating , page 24).
Let the system run for about ten minutes and see that it works properly.
check for leaks in the NetaFlex™ 3G and the infrastructure.
After tuning the flow rate for each dosing channel, adjust the cursors on each Rotameter.
NOTE
The Rotameter's scale is calibrated by the manufacturer for measurement of the
flow rate of water (H
2
O). Certain inacuracies may be observed when the flow rate
of liquids with different densities, such as fertilizers and acids, is measured.
SYSTEM OPERATION