Ultraviolet (UV) Water Disinfection System
Model - R1245 Installation & Maintenance Instructions
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INTRODUCTION
Rainfresh water disinfection systems utilize the proven properties of ultraviolet light (UV). UV emitted at 254 nm wavelength
kills/inactivates harmful bacteria (i.e. coliforms, fecal coliforms & E.Coli), viruses, fungi, algae, spores and other microorganisms
in water. UV purification is a natural, non-chemical, environmentally safe technique which does not form any harmful disinfection
by-products.
HOW YOUR UV DISINFECTION WORKS
Your Rainfresh UV system consists of a low-pressure UV lamp enclosed in a
transparent quartz dome, housed in a stainless steel disinfection chamber. As
untreated water enters the chamber from one end, microorganisms like bacteria,
viruses, fungi, algae etc in the water are exposed to ultraviolet light being emitted by
the UV lamp. The UV light kills/inactivates these microorganisms and treated water
flows out of the chamber and is ready for consumption. See Fig. 1
SAFETY INSTRUCTIONS
* To avoid
possible electric shock, extra care should be taken since water may be
present near electrical equipment. Unless specifically referred to in these
instructions, do not attempt repairs yourself. Contact the manufacturer for service
advice.
*
Do not
plug the unit in if any electrical surfaces or electrical parts are wet.
*
DO NOT LOOK DIRECTLY AT UV LAMP WHEN LAMP IS ON.
UV light can
cause serious burns to unprotected eyes and skin.
Do not
operate the UV lamp outside the UV disinfection chamber.
* Do not
use this unit for any purpose other than its intended use for potable water
disinfection. The use of attachments not recommended, approved or sold by the
manufacturer may result in improper performance of the unit or an unsafe
condition.
* Do not
operate the system if it has a damaged electrical cord or plug, is malfunctioning, or has been damaged in any way.
*
Do not touch
the lamp or quartz dome with dirty or moist hands. Hold the lamp and dome by the ends with
soft dry gloves
or cloth.
*
Before any cleaning or maintenance on the system, always unplug the unit from the power source. Disconnect from the
power outlet by holding the plug. Never pull the cord.
*
You must connect your UV unit to a grounded (3-pronged) receptacle (a GFI is preferred) and ensure that the lamp connector
ground wire is connected to the stainless steel end of the main chamber. Use of extension cords is not recommended.
* Installation of the UV disinfection system and water filter will interrupt electrical grounding continuity of your plumbing system.
For directions on restoring the electrical grounding continuity, consult your local electrical inspector.
*
Power source for applications outside North America must match requirements of the unit (For example 220V, 50Hz or other).
* Protect your unit from freezing. Drain all water from the unit if freezing temperatures exist.
*
The UV lamp inside of the disinfection system is rated at an effective life of approximately 9000 hours. To ensure continuous
protection,
REPLACE UV LAMP ANNUALLY.
BEFORE YOU INSTALL THE SYSTEM
1.
Fig. 1
The unit should only be operated with water that meets the following minimum criteria:
* Turbidity/Suspended
Solids:
Less than 5 PPM (mg/L). Ideally less than 1 NTU (Nephelometric Turbidity Unit).
A 5 micron
sediment filter should be installed before the UV system at all times
. We recommend Rainfresh Model FC150 (5 micron sediment
filter and housing assembly)
If the feed water has fine sediment, a finer pre-filter (1 micron or smaller) may be used. If the
water has very high turbidity, a backwashable multi-media filter is recommended.
*
Hardness:
Less than 7 gpg (120 mg/L). Hard water causes scale build-up on the quartz sleeves thereby reducing the UV
transmittance in the water and in turn reduced performance. For high hardness water, a water softener should be installed
prior to the UV system.
*
Iron & Manganese:
Iron less than 0.3 PPM (mg/L) and Manganese (less than 0.05 mg/L) is desirable. At higher
concentrations, a suitable water conditioner (e.g a greensand filter) should be installed prior to the UV system to prevent
iron build-up on the quartz dome.
*
Tannins and Colour:
Water with tannins or colour has low UV transmissivity that reduces UV system performance.
A tannin-removal / colour-removal activated carbon system should be installed to improve UV performance.
