Specifications

11
12.4 Discharge Drop Pipe (Optional; must be called for in the Technical Specification)
The pump station manufacturer shall supply the discharge drop pipe for connection to the irrigation main
line. The pipe will be of Schedule 40 steel, painted to match the pump station and sized for depth and
termination based on the irrigation contractors requirements or as shown on the bid documents.
12.5 Earth Grounding (Optional; must be called for in the Technical Specification)
The contractor will be responsible to provide earth grounding of the pump station to meg ohm reading of
not more than 10 ohms. The pump station manufacturer will provide the Paige Electric equipment part #
182007 for the ground rod, part # 182199L for the grounding plate assemble part # 1820039 for the Aone
shot@ welding kit and part # 1820058 for the PowerSet earth contact material This equipment shall be
install by the contractor per the Paige Electric instructions.
12.6 Filtration (Optional; must be called for in the Technical Specification)
Pump station discharge filtration will be described in the Technical Specification. The style, brand, model,
size, and mesh/micron size and mode of flush activation will be identified the Technical Specification.
12.7 Fertigation Injection System (Optional; must be called for in the Technical Specification)
Scope: Pump system manufacturer shall provide the following as part of the pumping system. These
items shall be shipped loose and installed on site. If there are any discrepancies between this section and
the main specifications, this section takes precedence
Fertigation Feed Injection System:
General Description: Pump station manufacturer shall provide a fertigation feed nutrient injection system
capable of independently injecting as specified in the technical data sheet up to four separate liquid
product(s).
Each injection pump shall to be controlled by a separate AC Variable Speed Drive. The pump(s) shall be
mounted on separate fiberglass base(s). The electrical controls to be mounted inside the pump station
control panel, and shall not be separate. The injection system software controls will be integrated as part
of the program logic controller operating the irrigation pump station. The pump(s) shall not be mounted on
the irrigation pump station skid unless otherwise specified. It shall be the responsibility of the irrigation
pump station manufacturer for installing wire and conduit from the control panel to the motors, installation
from injection pump discharge into the injection quill and start-up.
The pump station manufacturer shall provide a run relay, which shall provide a start/stop signal for a
fertigation pump(s). The run relay shall allow the fertigation pump to run only when a main pump is
operating and flow is in excess of 100 GPM. The GPM to activate or de-activate the fertigation pump shall
be field adjustable through the operator interface. Run relay will be mounted in a J-box on the control
panel exterior. Customer is responsible for installing the chemical supply tanks and the suction line to
each injection pump unless otherwise noted in the specification. The fertigation nutrient injection system
to be manufactured by Watertronics Hartland, Wisconsin Model EZ Feed.
The fertigation nutrient injection pump(s) shall have Teflon diaphragm with Alloy 20 contour plates and
Alloy 20 wetted parts. Each pump capable of delivering product from 3 GPH up to 80 GPH at the station
rated pressure. Pump(s) to be independently driven via AC Variable Speed Drive to accurately control
injection rate. As part of the injection system the suction and discharge isolation valves shall be
constructed of PVC, with PVC suction and discharge tubing.
The nutrient injection system shall automatically vary its flow output in proportion to irrigation flow. The
irrigation pump station flow sensor will provide the input signal to provide accurate application. All
calibration, setup, and operation functions shall be accomplished through pump station PLC controls and