© 2015 Delta Ultraviolet Corporation All Rights Reserved Rev 01/16 P/N 94-35234 Page 15
9. Install and tighten the black plastic mounting gland. Do not over tighten. Be careful not to cross
thread the plastic nut.
10. Reinstalling The UV Bulb: Seat the bulb end cushion on the end of the bulb (the end that goes down
into the quartz tube first).Place the two O-Rings around the top.
11. Without forcing, plug the UV lamp to 4 pin connector (attached to the ballast wires).
12. Reinstall the plastic electrical enclosure bonnet by screwing mounting screw.
13. Plug in Delta UV unit.
14. Turn on the circulation pump.
15. Verify that the bulb is lit by viewing the glow of the bulb through the clear plastic union.
Your DELTA UV unit can be damaged if allowed to freeze. The substantial pressure inside the wet chamber
caused by ice forming inside the wet chamber can break the glass quartz tube as well as the wet chamber itself.
Therefore, you must protect your DELTA UV unit from freezing. Damage due to freezing, including breakage
of glass components, the wet chamber, or water damage to other components caused by freezing IS NOT
COVERED under your Limited Warranty.
Freeze damage - Freeze damage can be avoided by keeping the water flowing at a minimum of .5 PSI
pressure (as noted on the operating pressure gauge) at all times, without interruption during freezing
temperatures. All time clocks must be inoperable and the pump must run continuously. Freeze damage can
also be avoided if the pump and DELTA UV unit are maintained inside a warm enclosure.
Freezing Weather Precautions - If you do not plan to operate your DELTA UV unit during freezing
temperatures, you must take precautions to make sure all water is removed from inside the DELTA UV wet
chamber so it does not freeze inside the wet chamber and damage the quartz tube, acorn nut(86-02417), and
DELTA UV unit. This can be accomplished by first closing any valves on lines in the plumbing system and
then open the inlet union at the bottom of the DELTA UV unit so that the water is drained from inside the
wet chamber tank. Remove Quartz tube (see Section F) and store in safe location. A safe precaution is to place
the DELTA UV unit in a warm location during freezing temperatures (recommended), after draining all the
water from the unit and removing it from the plumbing. Caution: A drain valve and piping to carry water
away from the DELTA UV unit must be installed if drainage of the DELTA UV unit will cause water damage
to the area surrounding the DELTA UV installation.
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