24
NETAJET
™
4G USER MANUAL
OPERATION AND MAINTENANCE
Winterization
CAUTION
When opening or closing any manual valve, always do so gradually, to prevent damage to the
system by water hammer.
In areas susceptible to freezing temperatures, if the system is not required for irrigation during the winter,
perform the following procedure
to avoid damage caused by freezing when the
NetaJet™
4G is idle for the
winter period:
At the beginning of winter:
• Gradually close the isolation valves and open the sampling valve until the pressure in the system is
released.
•
Remove EC and pH sensors and store the pH sensor immersed in KCL solution (supplied with the sensor)
or in calibration buffer 4 at a temperature of 18-25˚C (64-77˚F). The pH sensor must never be dry
(see the enclosed EC/pH Transducer Manual).
• Empty the NetaJet™ 4G of water.
At the end of winter:
• Reinstall the EC and pH sensors and calibrate them (see the enclosed EC/pH Transducer Manual).
• Gradually open the isolation valves until the pressure in the system is restored.
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