Ultraviolet Disinfection

Pure North Water Quality understands the importance of protecting you and your family from waterborne disease-causing microorganisms, without the use of chemicals. UV Dynamics designers have utilized sophisticated computer modeling techniques to optimize every aspect of each UV-Innovation model, resulting in premium quality performance that surpasses current public health standards. UV water disinfection is a proven , affordable, environmentally friendly technology that can help you to insure the safety of your water supply.

MODEL 13.30 PRODUCT FEATURES

  • Flow rate of 49L/min (13gpm) delivers UV dose of 40mj/cm2
  • Flow rate of 37L/min (10gpm) delivers UV dose of 30mj/cm2
  • Passivated and polished 304 stainless steel reactor 3.5” x 22”
  • 9000hr long life coated UV lamp
  • Microprocessor controlled UV power source with audible and visible lamp failure alarms
  • True Lamp Current closed loop current control
  • Annual lamp change timer
  • Lamp life remaining feature
  • ¾” MNPT fittings
  • Domed quartz sleeve to simplify servicing
  • No Tools required for regular servicing
  • Easy-service lamp connector
  • Optional Solenoid valve
  • Optional UV monitor system

Extreme weather, spring snow melts and run-off from intensive agriculture activities are all affecting the safety of our private water sources. Even municipal water can no longer be assumed to be safe with boil water advisories becoming more frequent. Compared to chemical disinfection, UV water disinfection can never overdose, has no effect on taste and odour, and no carcinogenic disinfection by-products are produced with UV water disinfection. UV water disinfection is considered effective against cryptosporidium and giardia, pathogens which are almost completely resistant to chlorine. UV water disinfection systems have low operating costs and no tools are required for maintenance or lamp replacement . All our models incorporate both audio and visual lamp failure indicators along with an annual lamp change reminder timer. Many models also incorporate an isolated low voltage solenoid drive circuit for an optional water shut-off solenoid valve.

Note on U.V Systems Although Pure North Water Quality is confident in the quality and performance of the U.V Dynamics systems, we do have access to other makes such as Trojan, Sterilight and there accessories.

Important information regarding U.V disinfection HOW LONG HAS

UV WATER DISINFECTION BEEN IN USE The first recorded use of UV water disinfection is in 1906 with a municipal installation in Anon France. Residential application of the process was given renewed interest during the 1950’s and has been growing at a rapid rate ever since. The technological problems and uncertainties faced by the early pioneers have all been resolved and today’s UV equipment is not only competitively priced, but offers low maintenance and low operating cost compared to other disinfection methods. It is the disinfection method of choice for most residential applications.

WHO SHOULD USE UV WATER DISINFECTION Anyone who receives their water from a private well or surface water needs to disinfect. In many areas we can no longer assume the safety of our water source with the ever increasing effects of agriculture and industry.

HOW DOES UV DISINFECT WATER The DNA of disease causing microorganisms exposed to UV light is disrupted so that it is not possible for the microorganism to replicate and cause illness.

WHAT IS UV DOSE UV dose is the function of both the intensity of the UV radiation and the length of time the water is exposed to the UV radiation. UV dose is expressed in millijoules(mj)/centimetre squared (cm2)

WHAT UV DOSE DO I REQUIRE UV disinfection equipment is being manufactured to a number of different dose standards and it is important to know what dose is being used when flow rates are specified. The oldest standard still in use is the US Department of Health standard which recommends a dose of 16mj/cm2. This dose is still considered acceptable for applications where the UV disinfection device is used to treat for nuisance organisms that colonize filters and water softeners when used with municipal water sources. For many years the industry used a standard of 30mj/cm2 for primary disinfection. More recently leading authorities including the US EPA and NSF have adopted a dose of 40mj/cm2 for primary water disinfection. We highly recommend the 40mj/cm2 for all installations where the water source is a private well or surface water and a dose of 30mj/cm2 for all applications with municipal water supply. The UVDynamics TM model number clearly identify both the dose and flow rate that the equipment is specified at. The first two numbers of the model number define the UV dose in mj/cm2 and the last number(s) indicate the flow rate in US gpm.

CAN I DO MY OWN INSTALLATION Were local regulations allow and you have basic plumbing skills UVDynamicsTM equipment can be DIY installed. Please review the downloadable PDF format installation instructions for more detailed information.

WHAT ARE THE OPERATING COSTS OF A UV DISINFECTION SYSTEM

The UV system uses about as much electrical energy as a 40watt light bulb.

DOES THE UNIT NEED TO BE ON CONTINUOUSLY Yes, The UV lamp needs to operate for several minutes to reach full UV output. Excessive on/off cycling of the UV lamp will greatly reduce its life expectancy. Additionally, by having the unit on continuously the chance that untreated water will be consumed is minimized.

WHERE DO I INSTALL THE UV DISINFECTION UNIT

UV disinfection equipment should always be the last stage of any water treatment system and should be installed so that both the cold water distribution system and the hot water heater receive disinfected water.

CAN I INSTALL A BYPASS VALVE Yes, if desired a bypass valve can be installed. For maximum security we highly recommend a bypass system described in the following diagram. The drain valve in the middle of the bypass loop should be left open when the system is operating normally and will not allow any bypassing of the disinfection chamber due to valve leakage.

I AM INSTALLING THE UNIT IN A COTTAGE UV disinfection is becoming very popular for cottages and summer residences. Provided you disconnect the UV disinfection unit from the AC power source and completely drain the disinfection chamber in areas where freezing temperatures are possible, the lamp should last for the full 9000hrs. We do not recommend disconnecting the unit from the AC power source in situations where the cottage will be used on a regular basis e.g. every weekend. When used in this manner the quartz sleeve should be cleaned annually and the UV lamp should be replaced after two years regardless of hours of use.

I HAVE MUNICIPAL WATER – DO I NEED UV DISINFECTION The majority of municipal water providers do an excellent job of providing a safe, reliable supply of water to their customers. If you have any reason to feel that your water provider is not in this group you may wish to install a UV disinfection system to provide additional water supply security for yourself and your family. If you are using a whole house point of entry activated carbon filter to reduce chlorine and other contaminates, then the use of a UV water disinfection device after the activated carbon filter is highly recommended as micro-organisms are known to colonize in these filter media. It is for this reason that many of the available countertop and pitcher filter devices recommend frequent media changes in their user instructions.

IS WATER PRE-TREATMENT REQUIRED The UV disinfection is a physical process and the microorganisms need to be exposed to a minimum level of UV energy for effective disinfection. To insure low maintenance reliable operation, the water to be treated must not contain any elements which significantly reduce the UV transmission of the water or elements which will form a deposit on the quartz sleeve which will lower the amount of UV light energy in the disinfection chamber. Water, which meets the following minimum guidelines, generally requires only an annual maintenance interval, consisting of lamp replacement and cleaning of the quartz sleeve.

Turbidity < 1 NTU
Suspended Solids < 10mg/L
Colour None
Total Iron < 0.3 mg/L
Manganese < 0.5 mg/L
Hydrogen Sulphide < 0.5 mg/L
Hardness < 7 gpg

If you are unsure as to whether your water source meets the required minimum standards, we suggest you have a sample of the water analyzed by a local water testing laboratory. We highly recommend, as a minimum, the installation of a 5 micron pre-filter before all UV disinfection equipment. If your water needs pre-treatment in addition to the 5 micron pre-filter we highly recommend you consult with a local water treatment dealer who is familiar with water conditions in your area.

HOW LONG DOES THE UV LAMP LAST The UV output of the UV lamp decreases slowly with age and has a useful life of 9000 hours. Beyond 9000 hours the lamp output starts degrade rapidly and disinfection performance will be suspect. UV Dynamics tm disinfection units are designed to provide the specified dose at the end of the useful lamp life. The integral lamp change reminder alarm will inform you of the necessity of changing the lamp. Operating the lamp beyond 9000 hrs will result in ever reducing disinfection performance.

DO I NEED TO REGULARLY TEST MY WATER Yes even with a UV disinfection unit installed regular water testing is still required to verify the safety of your entire water distribution system.