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3.1.1 Bore and Pump Systems

System Overview

Bore System

The bore system provides essential water supply infrastructure and includes production bores, a legacy bore, and various control and safety mechanisms.

Production Bores

  • Bore 1
  • Registration number: RN43075
  • Location: nearest Bore to the green shed with wire-mesh door, secured in a wire-mesh cage
  • Features:
    • Isolating valve for head pressure regulation
    • Inline pressure gauge
    • Power outlet located inside the green shed wire-mesh door, connected to white pump controller panel
    • Secured in a mesh box

Bore 1 Setup - Placeholder

  • Bore 2
  • Registration number: RN32812
  • Location: farest from the green shed with wire-mesh door, secured in a wire-mesh cage with green roof
  • Features:
    • Isolating valve
    • Inline pressure gauge
    • Power isolator switch on external pole
    • Connected via 3-phase power adapter
    • Enclosed in a metal security cage

Bore 2 Setup - Placeholder

🔹 Legacy Bore

  • Registration number: RN31076
  • Location: Inside the green shed with wire-mesh doors
  • Status: Not in use
  • Features:
    • Removable cover for pipe
    • Retained for reference or backup purposes

Legacy Bore (RN31076) - Placeholder

Specifications

  • System Capacity – 100L per minute
  • Water Quality Parameters – See Water Quality

Pump Systems

Overview

The pump system provides automated control and redundancy for continuous operation and includes advanced digital controllers, visual indicators, and fail-safes.

Electrical Supply

  • Three-phase power:
  • Bore pumps (Bore 1 and Bore 2)
  • Single-phase power:
  • F60 digital pump controller
  • Ultrasonic flow meter
  • Chlorine dosing pump
  • Main power isolation is located inside the white pump controller panel in the green shed with wire-mesh doors

Green Shed with wire-mesh doors (Primary Control Hub)

  • Contains:
    • F60 digital pump controller
    • Bladder pressure tank
    • Mechanical flow meter
    • Alarm system
    • Mode switches and indicators
    • Ultrasonic flow meter control box

Green Shed with wire-mesh doors Interior Overview - Placeholder

  • External pipework contains:
  • Ultrasonic flow meter sensors mounted to vertical pipe section
  • Flush valve for maintenance and testing

Ultrasonic Sensor on Pipe - Placeholder
Flush Valve - Placeholder

Control Systems

KELCO F60 Digital Pump Controller
  • Location: On the pipe manifold in green shed with wire-mesh doors
  • Purpose: Regulates pump operation with pressure, flow, and timer control

  • Features:

    • Multi-voltage input: 220–240 VAC, 24 VAC/DC, 12 VDC
    • Real-time pressure display
    • Up to 15 programmable timers
    • 40 Amp solid-state switch
    • IP64 weatherproof housing
    • Suitable for 25 mm (1") pipe and larger
    • Remote input for external integration
    • Alarm light output and beacon interface

  • Documentation:

F60 Control Panel (Interior) - Placeholder

Control Panel Details

  • Mode Select Switches:
    • Manual, Off, Auto for Bore 1 and Bore 2
  • Indicators:
    • Green "Run" lights for each Bore (active in manual or auto)
    • Red "No Flow" and "Overload" lights (now abandoned)
    • "No Flow Reset" button (also abandoned)
  • System Status Lights:
    • Red "Power On" light on panel top
    • Flashing beacon activated by F60 controller on alarm trigger

Control Panel Switches and Indicators - Placeholder

Manifold Area

  • Components Located in the Green Shed with wire-mesh doors:
    • Mechanical water meter
    • Inline pressure gauge
    • Pipe manifold joining both Bore lines
    • Isolating valves
    • Bladder pressure tank (with isolating valve)

Manifold and Pressure Tank - Placeholder

Chlorination System (Second Green Shed)

  • Location: Adjacent to green shed with wire-mesh doors
  • Contains:
    • Chlorine dosing pump
    • Dosing tank
    • Chlorine chemical storage
  • Injection Point: Installed in Bore line outsite at the easten end of shed
  • Monitoring Equipment:
    • Secondary mechanical water meter
    • Sensor for dosing pump activation

Second Green Shed - Chlorine System - Placeholder

Over-Pressure Emergency Valve

  • Purpose: Prevent damage from pump/system failure or closed float valves
  • Activation:
    • Opens automatically if system remains pressurized beyond safe limit
    • Prevents rupture or upstream damage due to over-pressurization
  • Location: In-line just before chlorine dosing point

Over-Pressure Valve - Placeholder

Water Quality

Monitoring

See 3.1 Water Supply – Water Quality Parameters

Sampling Procedures

Bore Sampling

  1. Disinfect tap outlet with 70% alcohol
  2. Flush for at least 5 minutes until temperature and clarity stabilize
  3. Collect Samples:
  4. Microbiological samples first
  5. Avoid touching bottle rims
  6. Label immediately with location, date, and sampler ID

Distribution Point Sampling

  1. Tap Selection: Use cold taps, avoid mixers or filters
  2. Flush and Disinfect: Remove attachments, flush 5 minutes
  3. Sample Order: Microbiological → Chemical → Physical
  4. Sterile Collection: Use lab-approved containers and techniques

Handling and Transport

  • Label samples clearly
  • Complete sample ID forms and chain-of-custody records
  • Deliver to lab within 24 hours

Key Parameters

Parameter Target Value / Limit Importance
pH 6.5 – 8.5 System performance, corrosion control
Turbidity < 4 NTU Impacts disinfection and filter efficiency
Iron < 0.3 mg/L Prevents taste and staining issues
Manganese < 0.1 mg/L Prevents black staining in fixtures
Hardness Monitor only Impacts scaling in pipes and pumps
Microbiological 0 E. coli/coliforms Compliance with drinking water safety

Maintenance

Routine Tasks

  • Pump and motor inspections
  • Bore flushing and cleaning
  • Control panel diagnostics
  • Water quality testing and reporting
  • Record keeping (logs, service reports)

Version Control

Version Date Description
1.0 2025-09-10 Initial Release

Next Review Date: 2026-03-10