Technical Exhibit 2 Maintenance Actions and Frequencies.docx

TECHNICAL EXHIBIT 2

MAINTENANCE ACTIONS AND FREQUENCIES FOR EACH SYSTEM

Note: These units are mostly installed as packages inclusive of cooling and heating element inside. However, some of units might have a remote coil (i.e. duct mounted heat/cool coil) and separate air cooled condenser. In those cases, the contractor shall complete with any other applicable maintenance actions.

3. Clean drain-pan and note excessive corrosion, prepare and paint as necessary.

if necessary.

7. Lubricate motor and fan bearings, if not sealed. Check alignment of motor and fan.

9. Replace pre-filters if needed.

10. Replace final filters if needed.

11. Check and adjust vibration eliminators. Replace if required.

12. Check and tighten all electrical terminals, connections, and disconnect switches.

13. Remove all trash or debris from work area.

6. Check mounting for tightness.

7. Check for and remove all corrosion or rust from unit and supporting steel, prime and

11. Lubricate bearings according to horsepower ratings:

12. Add grease - use top quality grade lithium base grease unless otherwise noted.

13. Check motor windings for accumulation of soil. Blow out with air if required, air pressure must not exceed 30 psig.

14. Check hold down bolts and grounding straps for tightness.

2. Check mounting bolts and tighten if needed.

3. Check fan for vibration or excessive noise. Lubricate fan and motor if required.

4. Clean air intake and screens; change filters as necessary.

9. Add grease - use good grade lithium base grease unless otherwise noted.

10. Check motor windings for accumulation of soil. Blow out with air if required, air pressure must not exceed 30 psig.

11. Check hold down bolts and grounding straps for tightness.

12. Clean up work area.

4. Check bearing collar set screws on fan shaft to make sure they are tight.

5. Check dampers for dirt accumulations, clean as necessary.

6. Check damper actuators and linkage for proper operation. Adjust linkage on dampers if out of alignment.

paint. Hose down coils and drain pans and wash with an appropriate solution.

11. Check belts for wear and cracks, adjust tension or alignment, and replace belts when necessary. Multi-belt drives shall only be replaced with matched sets.

TE#2 - 1

12. Check rigid couplings for alignment on direct drives, and for tightness of assembly.

Check flexible couplings for alignment and wear.

13. Vacuum interior of unit.

14. Lubricate fan shaft bearings while unit is running. Add grease slowly until slight bleeding is noted from the seals. Do not over lubricate. Remove old or excess lubricant.

15. Clean and wash permanent filters. Recharge wire mesh filters with oil.

16. Replace disposal filters.

17. Clean up work area.

18. Whole building of open and cleaning strainer inside, including FCU strainer.

19. Cover insulation.

1. Check damper for freedom of movement and proper operation.

2. Observe damper operation through full operating range, by activating controller.

Adjust linkage on vanes if out of alignment.

3. Check damper surfaces for wear and clean vanes.

4. Check actuator/damper linkage for proper operation. Adjust if needed. Tighten operator arm set screws.

5. Lubricate mechanical connections sparingly. Wipe off excess.

6. Check actuator for proper operation. If it does not stroke properly, check for binding drive stem.

7. Check for air leaks around actuator and in air line between controller and actuator.

8. Lubricate actuator linkage sparingly. Wipe off excess lubricant. DO NOT LUBRICATE actuator/drive stem.

9. Clean off any corrosion or rust on damper frame and or damper blades, coat with proper type and color paint.

2. Clean and wash permanent filters. Recharge wire mesh filters with oil.

3. Replace disposal filters.

4. Check coils. Report any leaks.

5. Check for rust or corrosion around coil frame and coil mounting bracket. Clean, prepare for painting and coat with proper type paint as necessary.

5. Check electrical connections for tightness.

6. Check mounting for tightness.

7. Check all refrigeration lines for support and signs of wear.

8. Thoroughly inspect and clean interior and exterior of machine.

9. Clean and treat all rusted areas. Touch up prime and paint as needed.

10. Perform required lubrication and remove old or excess lubricant.

11. Clean motor with vacuum or low-pressure air (less than 40 psi). Check for obstructions in motor cooling and airflow.

12. Check fan blades for dust buildup and clean if necessary.

13. Check fan blades and moving parts for excessive wear.

14. Check bearing collar set screws on fan shaft to make sure they are tight, if applicable.

15. Clean up the work area and properly dispose of debris and waste.

2. Inspect Coupling. Replace worn, damaged, loose couplings.

3. Clean strainer inside.

4. Check hold down bolts and grounding straps for tightness.

3. Check V-belt condition and tension. Adjust if needed, or replace.

4. Clean and wash permanent filters. Recharge wire mesh filters with oil.

5. Replace disposal filters.

6. Drain and clean condensate pan.

7. Lubricate fan shaft bearings (if not sealed).

8. Lubricate motor bearings sparingly using SAE 10W motor oil (if not sealed).

9. Clean coils by vacuuming or brushing.

10. Use fin comb to straighten coil fins.

11. Clean strainers for accumulation of dirt.

12. Clean fan blades and interior unit surfaces to remove soil.

13. Damp wipe exterior surfaces.

14. Clean surrounding floor area, and remove any dirt and debris from work area.

15. Clean and maintain whole building strainer. Replace if damaged, missing, or needed.

1. Check to see that operating control-stat activates damper/control valve per design specifications. Report to the COR if malfunctioning.

2. Check damper linkage for tightness or damage. Lightly oil moving parts.

3. Inspect dampers for free movement in duct or mixing box. Replace felt or other type seals as required.

4. Inspect mixing box and connecting ducts for air leaks. Correct leaks with duct tape or tighten connections as required.

5. Inspect damper activators for tightness to mounting brackets.

6. Tighten electrical connections to servomotors. Clean vent ports.

7. If pneumatic actuator does not stroke properly, correct sticking valve stem or binding linkage. Replace diaphragm if necessary.

8. Inspect for air leaks around actuator and in air line between controller and actuator.

9. Check unit for noise and vibration.

10. Check V-belt condition and tension. Adjust or replace as necessary.

11. If filters are installed, Clean and wash permanent filters. Recharge wire mesh filters.

12. Replace disposable filters.

13. Lubricate fan shaft bearings if not sealed.

14. Lubricate motor bearings sparingly, using SAE 10w motor oil if not sealed.

15. Clean coils by vacuuming or brushing.

16. Clean fan blades and interior surfaces of unit to remove soil.

17. Damp wipe exterior surfaces.

18. Clean up work area.

40 - 80 tons

2. Pressure wash coil with coil cleaning solution.

3. Straighten fin tubes with fin comb.

4. Check for and remove all corrosion or rust from unit and supporting steel, prime and paint as necessary.

5. Check fan blades. Clean fan blades as necessary.

over 250 tons

1. Remove debris from air screen and clean underneath unit.

2. Pressure wash coil with coil cleaning solution.

3. Straighten fin tubes with fin comb.

4. Check for and remove all corrosion or rust from unit and supporting steel, prime and paint as necessary.

5. Check fan blades. Clean fan blades as necessary.

3. Check fan blades and moving parts for cracks and excessive wear.

4. Check bearing collar set screws on fan shaft to make sure they are tight.

5. Check dampers for dirt accumulations, clean as necessary. Check felt and repair or replace as necessary.

6. Check damper actuators and linkage for proper operation. Adjust linkage on dampers if out of alignment.

7. Lubricate mechanical connections of dampers sparingly.

8. Clean coils by brushing, blowing, vacuuming, or pressure washing.

9. Use fin comb to straighten coil fins.

10. Flush and clean condensate pans and drains, remove all rust. Prepare metal and

Paint. Hose down coils and drain pans and wash with appropriate solution.

11. Check belts for wear, cracks, adjust tension or alignment, and replace belts when necessary.

12. Check rigid couplings for alignment on direct drives for tightness of assembly.

13. Vacuum interior of unit

14. Lubricate fan shaft bearings while unit is running. Add grease slowly until slight bleeding is noted from the seal, do not over lubricate. Remove old or excessive grease.

15. Clean and wash permanent filters. Recharge wire mesh filters with oil.

16. Replace disposal filters.

17. Clean up work area.

Frequency: