50 Tons & Under Man Hours 15
Over 50 Tons Man Hours 20
Special Instructions:
1. Perform cleaning of the condenser in accordance with PM COOLTWR-Q before
performing this PM activity
2. Schedule performance of this PM activity prior to seasonal start-up.
3. Review manufacturer's instructions.
4. Review the Procedure for "Controlling Hazardous Energy
Sources."
5. Deenergize, lock out, and tag electrical circuits.
6. Comply with the latest provisions of the Clean Air Act and Environmental
Protection Agency (EPA) regulations as they apply to protection of
stratospheric ozone.
7. No intentional venting of refrigerants is permitted. During the servicing,
maintenance, and repair of refrigeration equipment, the refrigerant must be
recovered.
8. Whenever refrigerant is added or removed from equipment, record the
quantities on the appropriate forms.
9. Recover, recycle, or reclaim the refrigerant as appropriate.
10. If disposal of the appliance is required, follow regulations concerning
removal of refrigerants and disposal of the appliance.
11. If materials containing refrigerants are discarded, comply with EPA
regulations as applicable.
12. Refrigerant oils to be removed for disposal must be analyzed for hazardous
waste and handled accordingly.
13. For refrigerant type units, closely follow all safety
procedures described in the Material Safety Data Sheet (MSDS) for the
refrigerant and all labels on refrigerant containers.
14. Properly dispose of any debris, excess oil, and grease.
Items to Check & Initial Completion:
Exterior Structural:
1. ___ Inspect louvers for correct position and alignment, missing or defective
items, and supports. Examine for ice damage.
2. ___ Inspect casings and attaching hardware for leaks or defects.
3. ___ Inspect condition of access doors and hinges. Repair as necessary.
4. ___ Inspect the distribution system, including flange connectors and gaskets,
caulking of headers, deterioration in distribution basins, splash guards,
and associated piping.
5. ___ Check screens.
6. ___ Inspect stairways (if applicable), including handrails, knee rails,
stringers, structure, and fasteners for rot, corrosion, security, and acid
attack.
7. ___ Shake ladders (if applicable) to verify security. Check all rungs.
Verify compliance with Occupational Safety and Health (OSHA) regulations
regarding height requirements.
8. ___ Fan cylinders must be securely anchored. Check fastening devices. Note
any damaged, corroded, or missing items. Verify proper tip clearance
between the fan blade and interior of the cylinder. Verify compliance
with OSHA requirements regarding height. Check its condition.
9. ___ Apply protective coatings as needed on metal surfaces. Be sure rust and
dirt have been removed first.
Interior Structural:
10.___ Inspect the distribution system piping for decay, rust, or acid attack.
Check the condition and tightness of water and coil connections. Observe
spray pattern of nozzles if possible and note missing and defective
nozzles.
11.___ Inspect mechanical equipment supports and fasteners for corrosion. Check
condition of springs or rubber vibration absorption pads, including
adjusting bolts, ferrous members, and rubber pads.
12.___ Check valves, float valve, and continuous bleed line (should be open).
Check operating condition of fire detection system, if installed. Check
for corrosion of pipes and connectors. Check wiring of any thermocouple
installed.
13.___ Inspect condenser fill for damage, ice breakage, deterioration, or
misplaced, missing, or defective splash bars.
14.___ Examine interior structural supports. Look for iron rot of metal
fasteners. Check condition of steel internals. Check condition and
tightness of bolts.
15.___ Inspect the nuts and bolts in partitions for tightness and corrosion.
Check condition of steel supports for rot and corrosion.
16.___ Check steel cold water basins for corrosion and general condition.
17.___ Check all sumps for debris, condition of screens, antiturbular plates, and
freely operating drain valves.
Mechanical:
1.___ Check alignment of gear, motor, and fan(s).
2.___ Check fan(s) and air inlet screens. Remove any dirt or debris.
a.___ Check hubs and hub covers for corrosion and condition of attaching
hardware.
b.___ Inspect blade clamping arrangement for tightness and corrosion.
3. Gear box:
a.___ Clean out any sludge.
b.___ Change oil in gear reducer. Be sure gear box is full to avoid
condensation.
c.___ Rotate input shaft manually back and forth to check for backlash.
d.___ Attempt to move the shaft radially to check for wear on the input
pinion shaft bearing.
e.___ Look for excessive play of the fan shaft bearings by applying force up
and down on the tip of a fan blade. (Note: Some output shafts have a
running clearance built into them.)
4. Power transmission:
a.___ Check that the drive shaft and coupling guards are installed and that
there are no signs of rubbing. Inspect the keys and set screws on the
drive shaft and check the connecting hardware for tightness. Tighten
or install as required.
b.___ Look for corrosion, wear, or missing elements on the drive shaft
coupling.
c.___ Examine the exterior of the drive shaft for corrosion. Check the
interior by tapping and listening for dead spots.
d.___ Observe flexible connectors of both ends of the shaft.
e.___ Inspect bearings, belts, and pulleys for excessive noise, wear or
cracking, alignment, vibration, looseness, surface glazing, tension.
Replace or repair as necessary.
5.___ Inspect condenser coil, fins, sprays, connections, etc. Clean if required.
6.___ Check water distribution. Adjust water level and flush out troughs if
necessary. Check all piping, connections, and brackets for looseness.
Tighten loose connections and mounting brackets. Replace bolts and braces
as required.
7.___ Check nozzles for clogging and proper distribution.
8.___ Check pump. Lubricate as required.
9.___ Check water treatment equipment for proper operation and condition. Clean
and paint as necessary.
Electrical:
1.___ Check electrical motor for excessive heat and vibration.
2.___ Inspect wiring, conduit, and electrical controls for loose connections,
charred or broken insulation, or other defects. Tighten, repair, or
replace as necessary.
3.___ Remove dust from air intakes and check for corrosion. Check TEFC motors
for condition of air passages and fans.
4.___ If there is a drain moisture plug installed, see if it is operational.
5.___ Check motor and starters. Check amps and volts at operating loads.
6.___ Look for corrosion and security of mounting bolts and attachments.
Tools & Materials:
1. Standard Tool kit.
Plus Refrigeration - gauges
Leak detector-electronic or halogen
Pocket thermometer
Clamp on meter (volt - ohm - amp meter)
Flaring tool
Tubing cutters
Packing kit and packing
Crescent wrenches to 14"
Pipe wrenches to 24"
Tubing cutters
Flaring tool
Small acetylene outfit
Packing tool kit and packing
3/4" socket set
Crescent wrenches to 14"
2. Lubricants. Consult the Material Safety Data Sheets (MSDS) for hazardous
ingredients and proper personal protective equipment (PPE).
3. Cleaning materials. Consult the MSDS for hazardous ingredients and proper
PPE.
4. Safety goggles.
5. Work gloves.
6. OSHA-approved ladders of appropriate size or scaffolding.
7. Volt-amp meter.
8. High pressure washer.
9. Protective coatings, brushes, solvents, etc. Consult the MSDS for hazardous
ingredients and proper PPE.
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