Rainfresh MEGA 8 User Manual Download Page 9

 

WINTERIZING YOUR SYSTEM:  

To winterize the system, unplug the unit first. Drain the pre-filters by removing the sumps and dumping the water. Let 
the filter cartridges dry out and then reinstall in the housing. To drain the UV, undo the SS flex connector (part # 4156) 
from the bottom until the UV drains completely. Re-attach the flex connector. Leave the UV lamp and dome inside. When 
turning unit back on, plug the ballast first and slowly allow water into the unit. Wait for about 10 minutes and flush water 
through for a few minutes before consuming water. 

 

(H) TROUBLESHOOTING 

 

PROBLEM 

PROBABLE CAUSE 

SOLUTION 

Leak at gland nut 

Gland nut is loose or O-ring 
defective 

Hand-tighten gland nut & replace O-ring(s) 

Condensation outside 
the UV chamber 

High humidity in the environment 

This is normal if humid conditions exist. Install 
dehumidifier to protect ballast. Protect flooring below 
UV 

Hot water coming out 
of taps/faucets 

Water inside UV unit becomes hot 
after long periods of non-use. You 
may have oversized the unit for the 
home 

To prevent scalding, before using water after periods of 
non-use such as overnight, flush water for about 2 
minutes. Install a temperature controlled purge valve on 
the UV outlet 

UV lamp ends seem 
burnt after some time 

This is normal 

As long as the UV lamp lights, a little burn mark at the 
ends is normal and there is no need to replace the UV 
lamp 

Sump is difficult to 
remove 

 

Unit may still be under pressure 

 

Head seal may be stuck to sump 

 

Close supply valve and open a faucet to release 
pressure 

 

To break the seal, use a pipe on the wrench handle as 
extra leverage to open the housing. 

Never use 

wrench to tighten the sumps. 

Always lubricate the  

O-rings with food grade silicone and replace annually 

Leak at pressure relief 
valve 

Debris under vent seal 

Replace vent O-ring 

 
 
 

(I)

 

TECHNICAL SPECIFICATIONS

 

 

PRODUCT SPECIFICATION 

MEGA8 

Suitable for Homes with 

Up to 3.5 bathrooms 

Max Rated Water Flow Rate 

8 US GPM (30 LPM) 

UV Dose at Max Rated Flow 

> 40 mJ/cm² @ 85% UVT 

AC Supply Voltage 

120VAC ; 50/60 Hz, 0.8A max 

Power Consumption 

48 Watt max 

Disinfection Chamber Material 

Stainless Steel 304 

Operating Pressure psi (kPa) 

10 – 90 psi (68.9 – 620 kPa) 

Water Temperature Range 

4 – 37⁰C (40 – 99F) 

UV Lamp Model 

R830L 

Lamp Service Life 

9,000 Hours (Approx. 1 year of use) 

Quartz Dome Model / Service Life 

R830QD / 3 years 

Sediment Pre-filter model/Service Life 

BC1 or BP5 / 4-6 months 

Carbon Pre-filter model/Service Life 

BC202 / 4-6 months 

Inlet/Outlet Port Size 

1” FNPT / ¾” Male NPT 

 
 

Summary of Contents for MEGA 8

Page 1: ...rainfresh ca CONTENTS A Introduction 2 B Safety Instructions 2 C Water Quality Requirements 3 D Installation 3 E Disinfection Procedure 6 F Ballast Features 7 G Operation and Maintenance 7 a Winteriz...

Page 2: ...plug Never pull the cord o Ensure that the lamp connector ground wire is connected to the grounding stud on the chamber during service o Do not touch the lamp or quartz dome by hand Hold the lamp and...

Page 3: ...h turbidity a back washable sediment filter is recommended as a pre filter We highly recommend a water test to confirm that your water quality is suitable for UV disinfection Rainfresh can test your w...

Page 4: ...recommended to build a bypass around the system so that you can still have untreated water in the house in case of unit malfunction or if you need to remove the unit for service Fittings Required for...

Page 5: ...gently rotate the dome while pushing in until it goes past the nut O ring 515 and touches the inside top end of the gland nut See Fig 5 Tip Rotate dome while pushing IN Fig 4 5 6 Carefully slide the q...

Page 6: ...hlorine and then shut the faucet off Repeat the procedure for all hot and cold outlets in the house Add more bleach as required Run hot faucets longer to allow the chlorine to come through the hot wat...

Page 7: ...il rSET is displayed Release button and the ballast will emit a long beep to confirm reset Green LED will come on and red LED will turn OFF Display will show 365 again G OPERATION AND MAINTENANCE Your...

Page 8: ...ff supply valve before the unit and then unplug unit from electrical outlet Open a faucet to depressurize the MEGA8 system and turn off the valve at the outlet port to isolate it WARNING DO NOT LOOK D...

Page 9: ...s Install a temperature controlled purge valve on the UV outlet UV lamp ends seem burnt after some time This is normal As long as the UV lamp lights a little burn mark at the ends is normal and there...

Page 10: ...n material or workmanship The Ultraviolet lamp is warranted for a period of thirty 30 days from the date of purchase against defects in materials and workmanship The company s obligation under this wa...

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