Sterilight Cobalt Plus Series Ultraviolet (UV) Sterilizers

The Sterilight Cobalt Plus Series is ideally suited for whole house water treatment to kill bacteria (including coliform and e.coli), viruses, cryptosporidium, giardia, and a wide range of other microbiological contaminants where flow rates of under 31 gpm are required. Given its economical price, UV intensity monitor, and optional emergency solenoid shut-off kit, the Cobalt Plus Series is a popular choice for homeowners with a known contamination problem involving a serious contaminant like e.coli, cryptosporidium, or giardia.

All Cobalt Plus Series units feature a stainless steel reactor chamber, a fire-polished domed quartz sleeve, and a high output Sterilight Sterilume™-HO coated low pressure germicidal UV lamp which can be conveniently changed without interrupting the water flow. The UV lamp provides a 4-log (99.99%) reduction of bacteria, viruses, and protozoan cysts (cryptosporidium and giardia) at the specified maximum flow rates. The Cobalt Plus Series electronic controller features a switchable power supply that automatically detects line voltage between 100-240 volt and adjusts its operating settings accordingly.

The Sterilight Cobalt Plus Series is composed of 4 models with treatment capacities ranging from 6 to 30 gallons per minute.

• Sterilight SCM-200
• Sterilight SCM-320
• Sterilight SCM-600
• Sterilight SCM-740

Feed Water Quality Parameters
Iron	0.3 ppm (0.3 mg/L)
Manganese	0.05 ppm (0.05 mg/L)
Tannins	0.1 ppm (0.1 mg/L)
Turbidity	< 1 NTU
Hardness	< 120 ppm (7 grains / gallon)
UV Transmittance (UVT):	75%
Maximum Temperature:	104F (40C)
Maximum Pressure:	125 psi

Pre-treatment Requirements:

All UV sterilizers required sediment pre-filtration to reduce or eliminate the possibility that a targeted contaminant could "hide" behind a sediment particle in the "shadow" of the UV light and therefore not receive a full dose of UV light. Accordingly, the manufacturer strongly recommends sediment pre-filtration down to a level of 5 microns or smaller.

Water exceeding 120 ppm in hardness (7 grains per gallon) should be softened to reduce the risk that hard water mineral scale will build-up on the UV sleeve thereby reducing UV light distribution into the UV chamber. Similarly, iron levels exceeding 0.3 ppm or manganese levels exceeding 0.05 ppm should also be treated to prevent staining of the UV sleeve.

Elevated levels of certain other contaminants, such as tannins, can cause a reduction in UV transmittance (the ability of the water to transmit UV light). If the UV transmittance (UVT) of your water is less than 75% after the above-mentioned pre-treatment, activated carbon filtration may be desirable to improve UV transmittance. The majority of deep wells have a UVT of 85% or greater. If your UVT is unknown, select a model with a higher flow rate capacity then you feel you will really require (this will provide a higher UV dose at your desired flow rate), or add an activated carbon pre-filter to your system. We recommend the following pre-filter equipment:

WH1B+ 5 Micron Sediment Pre-Filter Package excellent overall sediment pre-treatment to 5 micron level	WH2 Sediment & Activated Carbon Pre-Filter Package sediment pre-treatment to 5 microns and improves UV transmittance by removing tannins and other contaminants that reduce UVT	WH5 Iron Reduction Filter Package very cost effective iron pre-treatment filter for iron levels ranging from 0.3 to 5.0 ppm

Recommended Accessories:

Temperature Management Valve
The Sterilight Cobalt Plus Series can be equipped with a temperature management valve to regulate water temperature within the unit due to the high output lamp. The Sterilight temperature management valve is designed to release heated water from the unit during periods of low flow. It comes complete with 12' of 1/4" flexible drain line.

Flow Restrictors
The Sterilight Cobalt Plus Series can be equipped with a flow restrictor to ensure that you do not exceed the maximum flow capacity of the system. We recommend that you choose a flow restrictor rated for slightly less flow than the UV sterilizer based on a UV dose of 40,000 μWs/cm2. For more details, review our flow restrictors page.

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