Rainfresh R519 Installation & Maintenance Instructions Manual Download Page 3

7. Gently slide the dome
“O” ring (4032) over 
the top (open end) of the
quartz dome to about 1” 
from the open end.

8. Gently insert the quartz
dome into the gland nut
(4030) until it goes past the 
nut O-ring (515) and touches
the inside top end of the
gland nut.

CORRECT

Quartz dome is past gland
nut O-ring 
(515) and is touching the
inside top end of the gland
nut. 

Caution

: Do not push

hard as it can break the
quartz dome.

WRONG

Quartz dome is NOT past gland
nut O-ring (515) and is NOT
touching the inside top end of
the gland nut. 

WRONG

Do not insert quartz dome in chamber without first
attaching gland nut as per instructions. This can cause
a leak.

3.

 

9.  Carefully slide the quartz dome with gland nut 

attached into the opening at the top of the UV 
chamber and hand-tighten the gland nut into place. 
Do not overtighten the gland nut as it can break the
quartz dome. 

Note: Broken quartz domes are not under warranty.

10. Slowly open supply-valve and valves before and 

after UV system. 

Check for leaks. Do not 

proceed to next step until leaks are fixed.

11. Slide the lamp spring (4036) into the quartz dome 

followed care fully by the lamp. Holding the top end
of the lamp, attach the lamp to the lamp connector.
The lamp connector fits over the pins in only one 
configuration. Slide the lamp connector cover 
over the gland nut and tighten the black screw on 
it. 

6.  Carefully unpack UV lamp (R519L/R830L) and quartz dome (R519QD/R830QD). 

Note: Hold lamp and dome by the ends 

with soft, dry gloves or cloth.

The gland nut "O" ring (515) is in the groove of the gland nut (factory-installed) and the 

dome “O” ring (4032) is in a separate plastic pack.

Dome

“O” ring

515

12. Remove the nut from the ground stud at the top of the unit. Next place the ground wire (green wire with yellow stripes) over 

the stud and tighten the nut.

13. Connect the ballast to the AC supply. The green lamp-on LED will light, followed by three buzzer beeps and three red timer

LED flashes. 

Your Rainfresh UV Disinfection System is now ready for service.

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