With N2P Control’s Chartered Process Engineer’s help, Hynds Environmental wins their first major package water treatment plant project.

Not only can N2P Controls offer Electrical/Electronic automation design assistance, but can help with process engineering design, therefore, offering a fully package solution. This package solution helps give our clients a competitive edge.

Background

Turangi is located on the southern end of

Lake Taupo. The region around Turangi is

known for being The Trout Fishing Capital

of the World. It also boasts excellent

hunting, mounting biking, tramping, white

water rafting, skiing, and sightseeing.

Despite being surrounding by some of

the cleanest water in the world, the 3,500

people of Turangi did not have a water

treatment supply that met with the New

Zealand Drinking Water Standards 2005

(rev. 2008).

Problem

Turangi’s existing water treatment plant was

built in the 1950s, and consisted of taking

water from a natural spring, dosing with

chlorine and hydrofluorosilicic acid (HFA)

before pumping it to a reservoir. To meet

the revised New Zealand Drinking Water

Standards (NZDWS) the plant needed a

significant upgrade.

Taupo District Council put out a tender for

the upgrade of the Turangi Water Treatment

Plant. With N2P Controls’ resident Process

Engineer, Niki Johnstone, assisting Hynds

Environmental Systems Limited (HESL) won

this contract.

Solution

The upgrade included UV treatment,

chlorine dosing, hypochlorite dosing and

provision for future filtration. The tender

asked for the plant to be fully automated

with a telemetry link back to Taupo

District Council’s Service Centre, to allow

remote monitoring and control, and the

water reservoir, which is located 500m

away from the treatment plant. The plant

required a HMI at the plant to allow for local

monitoring and control.

N2P Controls won the contract to supply

the automation and telemetry link for HESL.

N2P Controls’ Niki Johnstone worked

with all parties involved with this project

including HESL, Harrison Grierson

(HESL’s Process Engineer) and Taupo

District Council to provide the Functional

Description for the new treatment plant.

Once authorised, N2P Controls, sourced,

programmed and installed the PLC and HMI

into the new Motor Control Cabinet. N2P

Controls also interfaced with the telemetry

system supplied by QTech.

N2P Controls’ own Design Engineer, Peter

Taylor, wrote the PLC program and was

on site to assist in commissioning. His

electronic, electrical and programming

CASE STUDYHelping Turangi Meet New Standards

Client Taupo District Council

Project Turangi Water Treatment

Plant Upgrade

Solutions Delivered Unitronics PLC & HMI Telemetry

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www.n2pcontrols.co.nz

background, coupled with his extensive

industry experience, makes Peter an ideal

partner to have on site to quickly overcome

any commissioning hurdles.

The Technical Stuff

The PLC and HMI used was a Vision 130

from Unitronics (an Israeli based PLC

manufacturer). The PLC used its propriety

communication protocol to communicate

with the HMI, and used Modbus TC/IP to

communicate with the QTech telemetry

unit. The PLC had 25 digital I/O points, 10

analogue I/O points and over 50 Modus

addresses that interfaces with the telemetry

unit. The PLC was housed within the main

MCC cabinet with the VSDs mounted

separately.

Outcome

With N2P Controls being able to

supply the automation design, supply

and commissioning assistance as a

package solution, it reduced the number

of contractors Hynds Environmental

had to work with, and allowed Hynds

Environmental to focus on deliverying a

successful project for their client. John

Bradford, Construction Manager at Hynds

Environmental, “Says the experience and

product knowledge of N2P Controls’ staff

ensured that we could entrust them with

automation of this project and freed us up

to focus on the installation of this project.”

N2P Controls prides itself on offering a

total package solution with engineering

assistance from a Chartered Process

Engineer, design and build of the

MCC cabinet, PLC procurement and

programming and on site commissioning

assistance.

Let N2P Controls help make your next

project a success.

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N2P Controls Limited 23A Queens Road, Panmure, Auckland 1072T +64 9 570 1919 F +64 9 570 1969 sales@n2pcontrols.co.nz

MEDBUS PROGRAMMING

CASE STUDY

Helping Turangi Meet New Standards

www.n2pcontrols.co.nz