Davey Aquashield Centurion 50W & 70W - Manual (Page 6)

6
Maintenance
Cleaning the quartz sleeve – 3 monthly
(or more often if used with hard water).
If dirt is allowed to build up on the quartz sleeve it will impair the UV output. The
quartz sleeve should be removed after one month and inspected for deposits.
– Turn off water supply to the inlet of the Aquashield Centurion system.
– Disconnect power by unplugging the cordset from the power outlet.
– Depressurise the system and drain the UV chamber by removing the drain plug.
Remember to put the plug back on when the chamber is empty.
– Unscrew the earth connection.
– Unscrew the 2 small screws holding the endcap on.
– This will expose the wiring for the lamp. Disconnect the lamp and remove it
straight up. Only handle the lamp by the ceramic-coated ends. Place it on a clean
surface where it is safe.
– Unscrew the endcap and lift it slightly to reveal the quartz sleeve. The endcap may
be held on to the sleeve by the o-ring. Gently remove the endcap from the sleeve.
– Lift the quartz sleeve out of the chamber by pulling it straight up. Try to handle the
quartz sleeve by holding it by the top 2cm. Try not to handle the quartz sleeve as
fingerprints can lead to dirt or grease shadows and a loss of efficiency.
– Use a soft cloth to wipe the quartz sleeve with a solution of CLR (Calcium Lime
and Rust remover) clean.
– Wipe the quartz sleeve with a damp cloth to remove CLR residue.
– Reinsert the sleeve to the chamber and refit the o-ring to the top of it. Place the
pressure ring inside the endcap and hold with your index finger through the central
hole. Screw the endcap in to place so that it is finger tight. Do not overtighten as it
can damage the quartz sleeve.
– Reinsert the lamp and reconnect the wiring. Push the cords into the top of the
quartz sleeve so that the 2 small screws can be inserted.
– Connect the earth wire.
– Refit the drain plug.
– Plug in the power and turn on. Allow the lamp to run for 2 minutes, turn the water on.
– If alarm sounds when the power is switched on, turn power off for five minutes to
allow for internal reset of the power supply.
– Check for leaks.