Netafim Fertikit 3G, Руководство по установке

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30 FERTIKIT 3G INSTALLATION MANUAL
ON-SITE PREPARATIONS
The water distribution system
For the setup of the water distribution system the following components should be installed
(according to the mode of the FertiKit™):
Components of the water distribution system
Item Specifications
16 Manual valve (isolation) To be installed at the inlet and at the outlet of the FertiKit™, for use during
system maintenance.
17 Main line
pressure sustaining
valve (PSV)
To be installed on the main line downstream from the FertiKit
TM
and able
to sustain a constant pressure at the outlet of the FertiKit™, regardless of
pressure changes in the field. Should be calibrated to 3-4 bars (43-58 PSI)
for most projects.
18 Irrigation valve Controllable.
19
Water meter
With electrical pulses. The pulse should be as short as possible according
to the main line diameter and the controller's limitations.
(See Flow meter recommended pulse rate below)
20 Main line filter ≤ 130 µm (≥ 120 mesh).
21 Main line pump
Suitable for the required pressure and flow rate according to the mode of
the FertiKit
TM
and the field requirements (Ensure stable pressure).
22 Main line
pressure reducing valve
(PRV)
In the PB , PL or MX mode - Should be installed on the main line, between
the main line filters and the water meter and be able to reduce the main
line pressure as specified for PL , PB or MX modes (pages 10/12/24).
In PD mode only - Should be installed on the main line, between the inlet
and the outlet of the FertiKit
TM
and be able to reduce the main line pressure
as specified for the PD mode (page 22).
23 Sampling outlet
In PD mode only - Should be installed on the main line, downstream from
the FertiKit's outlet (in all other modes the sampling outlet is built-in).
24 Saddle fitting
In PD mode only - Should be installed on the main line, downstream from the
FertiKit's outlet, equipped with an outlet suitable for the EC/pH sampling tube.
25 Command tube
In PD mode only - Should connect the saddle fitting to the EC/pH sampling
tube.
CAUTION
For PL , MS and MX modes only:
Since EC and pH sensors must never be exposed to pressure greater than 6 bars (87 PSI),
if EC and pH sensors are present on the FertiKit™ and the main line pressure is higher than 5 bars
(72 PSI), a 1½" PRV must be installed on the main line, upstream from the FertiKit™, reducing the
pressure to 5 bars (72 PSI).
Flow meter recommended pulse rate for NMC Pro and Junior controllers
*
*Users of NMC XL controller
and FertMaster, contact your
Netafim
TM
local representative.
Flow rate
m
3
/h
Flow meter output
l/pulse
Up to 6 1
6 - 60 10
60-600 100
Flow rate
GPM
Flow meter output
US gal/pulse
Up to 88 1
88 - 1000 10
1000-4500 100