Davey CRYSTAL CLEAR FIBRE GLASS MEDIA FILTERS - Manual (Page 3)

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Weather Protection
Davey Media Filter tanks are made from UV stabilised materials. However to
ensure years of reliable service, it is recommended that the filtration system is
adequately protected from the weather. For proper care and maintenance of your
filter, see section on “Filter Care”.
Assembly
1. Undo the V-band clamp or flange nuts and remove the multiport valve.
2. Look inside and check the lower under drain assembly to ensure laterals are
secure.
3. Half fill the tank with water to provide a cushion for the media.
4. Make certain the under drain assembly is correctly located onto it’s stand at the
base of the tank.
5. Place the sand guide in the top of the filter opening.
6. Pour the correct amount of 16/30 or 1mm grade sand or Zelbrite into the tank
(refer specifications), evenly distributing it around the central pipe. Level out the
top of the media bed.
7. Remove the sand guide and all traces of media from the tank flange.
8. Ensure the closure oring is clean and in the correct position. If necessary, apply a
thin film of oring lubricant to the orings. Assemble the multiport valve to the tank
aligning the ports to the appropriate plumbing.
9. Apply Teflon tape to the thread on the pressure gauge and barrel unions and
screw into the multiport valve body. 7 turns of tape is required.
CAUTION
• A non return valve is required in between the pump and filter.
• On installations where the waste line is more than 3 metres below pool
water level and more than 12 metres in length, a vacuum break valve
must be fitted in the waste line close to the filter.
• If an auxiliary pump is installed in line downstream of the filter, it should
be protected against causing negative pressure in the filter tank. A flow
or pressure switch which only enables the auxiliary pump to run when
the main filter pump is running will achieve this.
• If the pump and filter are located below pool water level, it is necessary
to fit isolating valves in the pipe between the pump and the skimmer
box and in the return pipe from the multiport valve to the pool. This
prevents water draining from the pool during maintenance.
FAILURE TO COMPLY WITH THE ABOVE CAUTIONS MAY RESULT IN FILTER
DAMAGE NOT COVERED BY THE GUARANTEE.
Pipe Connections
Use Teflon tape on all male threads. Piping should be independently supported and
not impose heavy loads on the filter or pump. Use 40mm or 50mm (1
1 /
2
” or 2”) pipe
from the pump to the skimmer box, return pipe for the multiport valve to the pool and
from the multiport valve to the drain.
DO NOT OVERTIGHTEN
The fittings and multiport valve on this product are constructed of
ABS. Some PVC jointing compounds are incompatible with ABS.
Check compound suitability before use.