10
OPERATING AND MAINTENANCE
Your Excelight NX UV System is “ON” continuously during normal operation. After
periods of not using your water supply exceeding two to three days, it is
recommended to open all faucets and flush your plumbing system for one to two
minutes.
WARNING!
ULTRAVIOLET LAMP REPLACEMENT
THE ULTRAVIOLET LAMP INSIDE THE REACTOR CHAMBER WILL
OPERATE EFFECTIVELY ROUND THE CLOCK, FOR APPROXIMATELY ONE
YEAR OR 9000 HOURS. THE LAMP WILL NOT LIGHT LONGER THAN THAT,
THE UV LIGHT INTENSITY MAY FALL BELOW THE PRESCRIBED SAFETY
LEVEL. (40MJ/CM
2
) THEREFORE, ANNUAL LAMP REPLACEMENT IS
NECESSARY REGARDLESS OF APPARENT LAMP CONDITION.
Replacing the UV Lamp and Cleaning the Quartz Sleeve:
A reminder that the chamber will be full of water so have a bucket and towels
handy.
1. Unplug the system from the electrical outlet and turn off the water supply to the
unit. It is advisable to wait 5-15 minutes before proceeding to the next step. The
water in the chamber can heat up
to 57 ˚C (135 ˚F);
2. Loosen the thumb screw on the electrical cap and carefully extract the lamp
connector from the electrical end cap assembly to just expose the top of the UV
lamp. While holding the lamp base firmly, disconnect the lamp 4-pin connector.
Gloves should be worn as
the lamp base can be very hot
. Be careful not to
drop the lamp into the quartz sleeve as both are easily broken.
3. Carefully slide the lamp out of the quartz sleeve and discard.
4.
Use caution as the water in the chamber may still be very hot at this stage
.
Loosen and remove both end caps. Place a bucket below the chamber and your
hand under the bottom of the sleeve. Using your other hand, carefully remove
the white and black rings from the top of the sleeve. Once the rings are off of
the sleeve top, the sleeve should fall into your lower hand. Carefully extract the
quartz sleeve from the reactor housing.
The quartz sleeve is very fragile and
is easily chipped or broken - use extreme caution when installing or
removing it from the reactor vessel.
NOTE:
Do not touch the lamp or quartz sleeve with your fingers. Handle by the ends
only or wear soft non-abrasive gloves.
5. Clean the quartz sleeve with vinegar or a readily available scale-removing
product. (Lime Away, CLR)
6. Examine the quartz sleeve O-rings. If they look worn or cracked, replace them.
Re-install the quartz sleeve. (See replacement parts.)
7. Install new lamp by reversing the procedure described in items #2-4 above.
