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How to Choose, Install, and Maintain a UV Disinfectant Unit

2021-03-17

Recently, ultraviolet water treatment has been referred to as... “New and Old Technologies,” due to increased adoption in residential applications. Installation Ultraviolet Disinfection System The main benefit is that, compared to using chlorine alone, the amount of chemicals required in swimming pools can be reduced by up to... 50 %, and obtain safer, cleaner water. This article will introduce the selection of UV disinfection systems, as well as their installation and maintenance.

I. Introduction

Before pool professionals begin selling UV disinfectants, they need to understand: UV-C the benefits and how to select the right equipment for specific aquatic applications. Depending on the flow rate and application type (commercial / Residential and Interior / Considering factors such as outdoor conditions and bathroom load, it’s crucial to match the unit size with the type of pool. By understanding these differences, pool professionals can easily determine which units to recommend.

Low-pressure and medium-pressure UV disinfection systems: There are two types of ultraviolet lamps: low-pressure, high-output lamps, which emit... 254 Nano ( nm ) of ultraviolet light; and medium-pressure lamps, which emit 200 To 600 Nano UV. Low-pressure lamps are more suitable for residential applications, while medium-pressure models are designed for large commercial facilities. The differences between each lamp type lie in cost, flow requirements, and the ability to break down chloramines. NH2Cl ) capability. Medium-pressure lamps are often used in indoor swimming pools because their broad-spectrum light more effectively reduces health issues caused by nitrogen trichloride (also known as chloramine), which has been linked to the closure of many swimming pools due to poor indoor air quality. Pool professionals handling indoor residential swimming pools—where air quality may also be a particular concern—should consider using semi-commercial or commercial UV equipment to ensure that clients achieve the desired improvements in both water and air quality. For outdoor residential swimming pools, it is essential to select a UV disinfection unit based on the pool’s flow rate to ensure that the system properly eliminates waterborne pathogens. Units installed in semi-commercial facilities (such as hotels, motels, or fitness centers) with flow rates exceeding per minute 110 Gallons (or per minute) 416 For swimming pools with a capacity of [amount] liters, a low-pressure, high-output UV system should be used, or the system should be designed to accommodate higher flow rates with mercury-based devices.

II. Selection

UV-C The size of the system depends on the number of gallons produced per minute by the filtration system, not on the amount of water in the container. Here, bigger isn't always better. gpm The rating is based on the design of the lamp and container, as well as computational fluid dynamics computer simulations. According to... NSF / ANSI 50 The standard, correct rated power for commercial ultraviolet devices is: 30 Megajoules. This is the point in time at which all pathogens found in the pool water will be disinfected.

Ultraviolet Disinfectant

Ultraviolet disinfection units can handle various flow rates. The manufacturer will... gpm Produce each unit for both smaller and larger flow rates. For example, the unit... XYZ Process it 57 To 80 gpm If the flow rate of the pool system exceeds... UV-C The larger device gpm Rated value—then the disinfectant cannot achieve the intended effect. 99.9 % single-organism disinfection rate. If water flows through... UV If the container's speed is too fast, the water column will interact with the chamber. UV-C The contact time between the light and the water is insufficient to achieve sterilization. Conversely, if the water in the pool flows too slowly, it will remain in the light chamber for an excessively long period, leading to photooxidation of some free chlorine and thereby increasing the required chlorine concentration in the pool to maintain an adequate residual level of free chlorine.

All sterilization processes are carried out within the container, and... UV-C It leaves no residue and produces no corrosive gases. Select. UV-C Another factor to consider when installing the device is the bulb’s lifespan. UV-C The rated lifespan of a lamp is expressed in hours, and the lifespan refers to the duration during which the lamp will produce sufficient millijoules. UV-C The time required to effectively disinfect single-celled organisms in water using the appropriate disinfectant. The typical lifespan of the bulb is... 9,000 To 16,000 Hourly, from a practical standpoint, this means that some light bulbs have a lifespan of... 12、16 or 24 months. Purchase UL / ETL Certified devices are beneficial because customer safety and satisfaction are critical to any business, and having these certifications... UV The device can provide additional insurance.

III. Installation Steps

UV-C The unit should be installed in a straight line within the pipeline. It is essential to... UV-C The device is placed after the filter, and the particles in the water will create a shadow effect inside the device between the lamp and any single-celled organisms we wish to disinfect. If the system includes a heater, then... UV-C The selected position of the unit is upstream of the heater. Use. UV-C The device will extend the heater’s lifespan by removing chloramines, which are corrosive to the metals in the heat exchanger. Some equipment has very tight gaskets; therefore, if installation behind the heater is necessary, UV-C For this device, please contact the manufacturer to ensure that the plastic used in this particular device can withstand the hot water flowing from the heater.

These units should be installed with sufficient space to allow technicians or operators to replace the lamps and clean the quartz tubes in the future. Glass lamps and quartz tubes cannot be bent; therefore, it is crucial to provide adequate space so that they can be removed directly from... UV Removed from the system. Has UV-C The typical pool of the device will also include a chlorine gas feeder. This should be in... UV-C It is carried out after the installation and usually follows immediately before the water flow returns to the pool.

The UV system can be easily added to existing circulation systems. - Again, after the filter and before other accessories (such as a heater or chlorinator). UV The device should be inserted vertically at the bottom inlet, so that... UV The system correctly fills with water according to the device’s flow rating. The device is equipped with a tail pipe that can be routed around the device by using a few elbows and valves, allowing the tail pipe to enter the pipeline vertically and thus forming a circulating system equipped with ultraviolet disinfectant. The equipment should be drained according to the manufacturer’s instructions to ensure... UV The system correctly fills the water according to the device’s flow rating.

Many professionals bypass the bypass system by allowing operators or technicians to disconnect the UV system when necessary—especially during winter—thus making repairs and maintenance much easier. Since UV lamps and quartz tubes are made of glass, they must be brought indoors when the pool is not in use to prevent damage during winter, such as freezing.

IV. Maintenance

UV-C The device is very easy to maintain, yet proper secondary disinfection is crucial. The first maintenance function is to clean the exterior of the quartz tube. UV-C The sterilizer’s lamp is housed inside a quartz tube to keep the lamp isolated from the water. Over time, calcium in the water can seep onto the exterior of the test tube, obstructing... UV-C Light waves penetrate water correctly. Use one piece every six months. 50/50 A mixture of vinegar and water applied to a clean, soft cloth to wipe the exterior of the quartz tube will enable... UV-C The system operates with optimal performance. Depending on the bulb lifespan of the device you’ve chosen, you’ll need to replace the bulbs according to the manufacturer’s recommended schedule.