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The TSR II system requires routine maintenance on the following components:
- Fiber optics
- Ground connections
- Power
- Air filters
Fiber Cleaning
Unclean fibers are one of the most common causes of system failures. In order to minimize the risk of system failures due to dirty fibers, ensure that you have access to a fiber cleaning kit at the site.
Before installing a module, clean each connector on the OC-3c, OC-12c, OC-48c, and OC-192c modules using dry and or wet cleaning techniques according to manufacturers cleaning guidelines.
Before installing new fiber, inspect the fiber patch cords connecting the TSR II system to centralized fiber management systems in the Telcos using an OFS 300 Optical Fiber Scope. Additionally, patch cords in use should be inspected monthly for dirt and damage.
Upon removing any shelf module, the appropriate connectors should be cleaned before the module is inserted back into the shelf.
WARNING (W:B-1) Risk of personal injury. This is a Class 1 laser product. Invisible laser radiation can be emitted from the port aperture when the fiber cable is disconnected. Avoid exposure to laser radiation and do not look directly into open apertures
Ground Connections
Ground connections to TSR II system should be checked monthly to ensure that the total leakage current does not exceed 0.1 amps. Leakage above this value is not acceptable and should be investigated.
Power Connections
Power lugs going into the BIP should be checked and tightened as required. The lugs have a tendency to loosen which can cause system failures.
Replacing the Front and Rear Air Filters
The TSR II bay has two removable air filters seated horizontally in trays mounted inside the front air intake assembly and rear intake assembly. The filters are of identical type for the front and rear. The filters screen out environmental dust drawn into the system by the cooling modules.
The TSR II system uses only UL listed 94H-1, UL 900 Class Universal polyester air filters.
Figure B-1 shows the TSR II air filter.
Figure B-1. TSR II Air Filter
Air Filters require removal or replacement approximately once every four weeks, more often in highly dusty areas. A damaged or worn air filter prevents proper flow of cooling air, which might result in an over temperature condition.
Adhere to all caution and warning statements while performing filter maintenance procedures.
Figure B-2. Front Grille Wing Screws
Figure B-3. Rear Air Filters
PROCEDURE: Use the following steps to replace front and rear system air filters:
Step 1 Remove the front grille to access the front plenum assembly. The front grille removes via four 1/4 turn thumbscrew fasteners (turn fasteners counterclockwise to remove).
Step 2 The front air filters are retained via a pivoting piece of aluminum angle stock (retained by a rivet). Turn 90 degrees vertical to unlatch. Turn 180 degrees horizontal to latch.
Step 3 The rear air filters are retained by spring-loaded hinges at the top of the rear air plenum (one per filter). You can remove a filter by gently lifting up on the thumb tabs. (There is no rear grille).
NOTE Note that it is not necessary to remove the plenum(s) to remove and clean the air filters.
Step 4 Hold the front grille at a 45-degree angle and vacuum it if necessary.
CAUTION (C:B-1) Risk of service interruption or equipment damage. Do not place tools on the filter tray. Damage to the honey comb screen of the filter can restrict air flow.
Step 5 With your thumb and forefinger grasp the edge of the clean air filter and slide the clean air filter into the front or rear air intake plenum until it is in place.
NOTE The flow direction arrow on the filter faces toward the inside of the grille assembly.
Step 6 Secure the front and rear air filters per the previous steps above.
Step 7 Attach the front grille assembly with the 1/4 turn winged screws.
Cooling Modules
It is critical to address cooling module failures immediately as lack of proper cooling will effect the performance of the TSR II system.
Filler Modules
Customers should order enough filler modules to ensure that the TSR II bay maintains the appropriate air flow.
CAUTION (C:B-2) .Risk of service interruption or equipment damage. Install filler modules in all empty slots to prevent the system from overheating
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Copyright © 2006
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR™ are
trademarks of Avici Systems Inc.
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Last Updated: 12/08/06 at 11:02:18