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Copyright
2009 Nalco Company
8-3
Technical Help
(630) 305-CHEM
3D TRASAR
5500 - Installation & Operation Manual
8.5
Probe Replacement Schedule
To minimize downtime, it is recommended to keep spare pH, ORP and Corrosion probes on hand.
Part numbers can be found in Appendix C.
* Replace Conductivity probe only in the event of failure.
8.6
Cleaning Basket / Wye Strainer
Visibly inspect the inlet basket strainers on both the pellet feeder and the 3D TRASAR system.
Debris can be cleared by shutting off the inlet and outlet valves and unscrewing the clear bowl. Pay
care not to lose the o-ring seal on the bowl assembly. The mesh screen can be removed, rinsed in
clean water and then reinstalled.
The wye strainer assembly on the pellet feeder serves as a dissolving chamber for the bio-reporter
pellets. If any residue from bio-reporter pellets remains in the strainer wear rubber gloves when
removing and cleaning this strainer mesh.
Close the inlet and outlet valves and unscrew the plug at the end of the wye. Remove the mesh and
rinse with clean water.
8.7
Pellet Feeder Maintenance
For trouble free operation, the following maintenance instructions can be found in section 6.
• Check/Refill Pellet Feeder. Replace Pellet Feeder Desiccant. Please refer to section 6.5
• Clean Pellet Feeder. Please refer to section 6.7
• Tighten Pellet Feeder Valve Seat. Please refer to section 6.8.2
• Replace Pellet Feeder Rotor Shield. Please refer to section 6.8.3
8.8
Check / Refill Pellet Feeder
Check to see that the Pellet Feeder is at least ¼ full of bio-reporter pellets. If less than ¼ full add a
full container of Pellets and replace the desiccant pack in the lid with the new one provided. Re-
placement desiccants are included with each container of pellets. Refer to Section 6 for detailed
pellet feeder maintenance.
Probe
Replacement Frequency
pH
Every six months or when probe
readings become erratic.
ORP
Every six months or when probe
readings become erratic.
Corrosion
Every sixty to ninety days or when
probe readings become erratic.
