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Note:
When you reach this stage, the nut only needs to be turned ½ to ¾ of a turn to compress
the “O” ring sufficiently and form a seal. You may check the “O” ring has been
compressed well onto the quartz thimble by looking down through the sealing nut. Ideally
a good compression will see 2-
3mm of “O” ring flattened around the quartz thimble.
At this stage it would be advisable to check the “O” ring seal against maximum water pressure
before installing the UV lamp.
During this next step care should be taken to not leave any markings on the UV lamp.
Do not touch the lamp without protective gloves.
If the chamber is installed vertically, NEVER drop the lamp into the quartz thimble, as this may
crack or break the thimble.
11. Remove the UV lamp from its protective wrapping and wipe down with a soft cloth soaked in
methylated spirits. Push the female 4 pin connector firmly onto the lamp pins.
(picture 7 & 8).
12. Using a soft cloth to hold the UV lamp, insert into the quartz thimble through the hole in the
centre of the sealing nut.
13. Always keep a firm hold of the UV lamp until it is secured into its four pin connector. Push the
female 4 pin connector firmly onto the lamp pins. (picture 7 & 8).
Picture 6
