amiad DVF, Инструкции по установке, эксплуатации и обслуживанию, Страница: 17 / 42

910101-001048 12/2019 Page 17 of 42
Maintenance
1. Leakage Test
This process should be performed for each of the filter vessels, after installation onsite, prior to media loading.
1.
Open the filter's upper service port and ensure that all nozzles are in place and none are missing or displaced.
2.
Close the filter's service ports.
3.
Ensure that all the filter valves are closed.
4.
Open the inlet valve (V1) and let water flow into the filter.
5.
Apply water pressure gradually up to the operation DVF filter pressure.
Attention - maximum pressure allowed is 7 bar (5 bar for DVF 300)!
6.
Check the valves' connections and manifolds for leaks and repair any leak found.
2. First Operation
1.
Open the main raw water supply valve (V1) and let water flow into the system.
2.
Perform a forced flush cycle. Flush the filter until the backwash outlet (V4) water is clean.
Note
: Ensure minimal backwash flowrate according to the technical data table (pp.8).
3.
Switch to Auto operation mode
4.
Adjust all operational setpoints in the control system (as per control philosophy).
Recommendations: clean DP ~0.3 bar; Backwash trigger DP ~0.8 bar.
3. Periodic Inspection
1. Check for leaks from connections and fittings.
If leaks are found, repair them and re-secure the connections if required.
2. Manually start and complete a backwash cycle.
3. When the filter will not be in use for a long period, it can be drained after disinfecting, and left dry until used
again.
4. In environments where freezing conditions occur, open all filter covers and drain the water totally out of the
filtration system. After the filter is drained, close the upper covers.
4. Monthly Maintenance
1. Visually inspect the outer vessel surface for early signs of corrosion.
2. Visually inspect the gasket sealing areas for signs of water leakage.