Summary of Contents for Davnor SA 60
- Page 1 Automated Surface Water Treatment System INSTALLATION, OPERATIONS & MAINTENANCE MANUAL...
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Page 2: Table Of Contents
Table of Contents 1. Introduction ......................1 2. Operations Summary ..................1 3. Assembly ......................2 4. Filter Media Installation ..................6 5. System Commissioning ..................7 6. Sanitizing Procedure ..................8 7. System Start-Up ....................9 8. Operation ......................9 9. Filter Maintenance ..................10 10. Degassing the Filter Media ................11 11. -
Page 3: Introduction
Do not attempt to treat wastewater, heavily polluted or contaminated water. Please contact a Davnor representative if there is any uncertainty regarding the treatability of the water. -
Page 4: Assembly
Model No. Flow Rate (nominal) Filter Dimensions Storage Tank Diameter (cm) Height Capacity Dimensions (cm) (gallons) (cm) LWH Bottom SA 60 0.25 150 x 70 x 90 SA 120 150 x 70 x 90 SA 240 150 x 70 x 90... - Page 5 Figure 3-1 Automated System Layout 1. BioSand Filter 12. Standpipe Lower Valve 21. High Level Float Switch (to the solenoid valve) 2. Filter Stand 13. Maintenance Drain Valve 22. Low Level Float Switch (to the pump) 3. Storage Tank 14. Filter Outlet Valve 23.
- Page 6 Important Notes: • All of the assembled components have been loosely fitted together. Use Teflon tape on all threaded connections and tighten. Do Not Over-Tighten the PVC fittings. (They will crack if over-tightened) • Refer to Figure 1 to find the locations for all system components. •...
- Page 7 Note : The solenoid can either be attached directly to the filter inlet or mounted to the filter stand or another convenient location. • Connect the filter outlet at the filter outlet valve to the filtered water storage tank inlet. Step 6.
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Page 8: Filter Media Installation
4 Filter Media Installation Step 1. Leak test the filter. Close all valves except the flow rate control valve and fill the filter with water to the maximum water level. Drain the filter and repair any leaks before Maximum Water Level installing the filter media. -
Page 9: System Commissioning
Table 2- Flow Rates Model No. Flow Rate (nominal) SA 60 0.25 SA 120 SA 240... -
Page 10: Sanitizing Procedure
Step 5. Open the anti-siphoning Anti-siphoning valve. Close the storage tank valve inlet valve. Open the sampling Filter outlet valve at the storage tank inlet valve Storage tank inlet valve (Figure 5-2). Be prepared to collect water from this point during the next step. -
Page 11: System Start-Up
Step 4. Open the filter inlet valve. Flush the sanitizing solution through the sampling valve. Note : The filter will not achieve 100% removal of bacteria. If you do not have downstream chlorine injection bacteria may colonize in the piping downstream of the filter and the storage tank. -
Page 12: Filter Maintenance
9 Filter Maintenance Step 1. Close the inlet valve to the filter. Allow the filter to drain to its "paused" Float Anti-siphon valve valve level before beginning this procedure. diffuser basin Step 2. Close the filter outlet valve Union connection Filter (figure 9-1). -
Page 13: Degassing The Filter Media
10 Degassing the Filter Media Degassing is part of the normal filter maintenance procedure. In some situations, the surface of the filter media may appear clean, but there is low flow. This is an indication the filter media is air locked. This may be due to accidental de-watering of the filter or the presence of dissolved gases (hydrogen sulphide, carbon dioxide, air, methane) in the raw water source. -
Page 14: Refilling
#1 sand and #2 sand, for ease of re-installation. Note : The filter media is wet and will be heavy. If desired, new media can be ordered from Davnor. Step 7. Follow the system installation instructions to re-install. -
Page 15: Trouble Shooting
14 Trouble Shooting Problem Possible Cause and Solution Low flow rate 1. Filter flow rate has slowed due to sediment build up on the top layer of sand. Perform maintenance on the filter (Section 7). 2. Filter has become air-locked due to dissolved gases in the water coming out of solution.
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