WCS WPL VSF04, Руководство по эксплуатации и обслуживанию, Страница: 11 / 26

Operation & Maintenance Manual
10 | P a g e
Note: Dimensions are detailed on the GA Drawing for each individual plant which is sent to the
customer with confirmation of order. If this has been lost, please contact WPL for another copy.
Step 2 Cast the concrete base; ensure that the slab is designed to support the unit in its normal
operation (i.e. full of water). The base must be level and to the correct height to suit the invert
level of the sand filter. Allow for initial set before positioning the unit.
Step 3 Excavation must be kept dry during the installation and until the concrete has cured.
Step 4 Ensure the surface of the concrete base is free of water, stones etc. and lower the unit
into correct position to suit pipe connections. Check the levels.
Step 5 Stabilise unit in excavation, taking care not to cause distortion of the unit. Fit temporary
covers over all pipe connections.
Step 6 Commence filling unit with water into all sections to a level of 500mm.
Step 7 Commence back filling with lean mix. The back fill must be evenly placed around the unit
at all times and worked by hand up to a maximum level of 400mm above the base.
DO NOT USE VIBRATING POKERS
The water level in all sections must be increased and be kept at a level of 300mm above the top
of the backfill, until final pour after step 8.
Step 8 When the backfill is approximately 0.5m below the lowest underground connections, pipe
connections should be made. Remove lifting eye nuts and bolts and replace with green silo bolts
supplied. Also provide for hose draw chamber, servicing ducts for the air lines and future cable
connections to the unit via bulkhead connectors. Fit bulkhead connections through tank top or
extensions with the orientation to suit the site.