Wiper System Description

9 ACTICLEAN

CLEANING

Cleaning Agent

Only Trojan ActiClean^TM Gel is recommended as a cleaning agent. Specifications are listed in the Material Safety Data Sheets (MSDS) Appendix.

Trojan ActiClean^TM Gel is required to remove hard water scale. Other commercially available cleaning agents are not recommended. Some ingredients in other cleaning chemicals may react with UV and form a coating on the sleeve that is difficult to remove and will impair UV Transmittance.

Operation

For automatic cleaning, the system operates in the Remote Automatic Mode and cleaning occurs at preset intervals determined by the programmed settings in the SCC.

Each HSC has two selector switches (each with 3-positions) on the side of the PDC. There is always one Wiper Control switch and one Wiper Mode Selector switch.

The automatic wiping sequence is typically initiated once a day or as a maximum every 12 hours. However, depending on the wastewater characteristics, the interval between cleaning events can be adjusted at the SCC.

For testing, or troubleshooting, it may be necessary to manually extend or retract the Wipers in a Bank.

Note:

Note:

PDC Busway Cover

PDC Service Entrance

Cover

HSC Wiper Mode Selector Switch ON or

LOCAL/Off/REM Left Side

HSC Service Entrance

PDC Bank Mode Selector Switch

ON/Off/REM

HSC Wiper Control Switch SEQ/RET/EXT

9.2 ActiClean™ Cleaning System (ACS) The ActiClean™ Cleaning System (ACS) uses a patented submersible wiper drive to clean the lamp sleeves while they remain submersed in the channel and disinfection continues. The wiper drive is hydraulically actuated by the HSC and programmed through the System Control Center (SCC).

Cleaning of UV lamp sleeves is achieved by the following:

• The mechanical scraping action of the wiper canister seals

• The chemical cleaning action of the agent within the wiper canisters

The HSC pumps hydraulic fluid to manifolds resting below the PDC(s). Extend and retract hoses from each module are plugged into the manifold to complete the hydraulic loop.

Each module is fitted with a magnetically

coupled submersible wiper drive. Hydraulic fluid is used within the enclosed rod to push an internal piston in both directions along the rod.

Magnets on the internal piston couple with magnets on the wiper drive cylinder, which fits like a sleeve over the rod. As the internal piston in the rod is hydraulically pushed, the magnetic wiper drive cylinder follows on the outside of the rod.

The wiper drive cylinder is attached to a Wiper Drive Bar, which is connected to the wiper canisters filled with a cleaning agent. As the wiper drive advances along the module, the wiper canisters are pulled along and the cleaning agent comes in contact with the lamp sleeve between the two wiper seals.

The combined mechanical and chemical wiping of the lamp sleeves effectively cleans the lamp sleeves while they remain submersed in the channel.

In remote mode, the ACS is controlled by the SCC which implements the cleaning cycle to all connected banks and then repeats the cycle at regular time intervals pre-selected by the operator. The ACS wiping sequence can be manually initiated from the SCC.

The ACS can also be manually controlled by moving the Wiper Mode Selector switch on the HSC to LOC (local) mode. Placing the Wiper Control switch in the SEQ (sequence) position will initiate the cleaning cycle one bank at a time.

The RET (return) and EXT (extend) positions are used primarily for performing maintenance checks on the wiper system.

Cleaning Agent

Only Trojan ActiClean™ Gel is recommended as a cleaning agent. Specifications are listed in the Material Safety Data Sheets (MSDS) Chapter.

Trojan ActiClean™ Gel is required to remove hard water scale. Other commercially available cleaning agents are not recommended. Some ingredients in other cleaning chemicals may react with UV and form a coating on the sleeve that is difficult to remove and will impair UV Transmittance.

Operation

For automatic cleaning, the system operates in the Remote Automatic Mode and cleaning occurs at preset intervals determined by the programmed settings in the SCC.

Each UV system has at least two selector switches (each with 3-positions) on the side of the HSC. There is always one Wiper Control switch on the top and there can be between one to eight Wiper Mode Selector switches below.

As one HSC is capable of providing automatic cleaning for a maximum of eight Banks and each Bank of Lamps has its own Wiper Mode Selector switch, there can be up to eight Wiper Mode Selector switches.

The automatic wiping sequence is typically initiated once a day or as a maximum every 2 hours. However, depending on the wastewater characteristics, the interval between cleaning events can be adjusted at the SCC.

For testing, or troubleshooting, it may be necessary to manually extend or retract the Wipers in a Bank.

Note:

Note:

Note:

Operation of the ACS without the lamps fully submerged may result in damage to the ACS system.

To Manually extend (EXT) or retract (RET) all Wipers in a Bank

1. Move the Wiper Mode Selector switch to OFF