Application: Man Hours 3
This Inspection applies to ceiling or wall mounted air conditioning units, i.e.,
mini-mates. The unit may be for comfort or special purpose cooling and can be
either air cooled or water cooled. Humidifiers will be operated on those units
serving computer space and will be inventoried and serviced under this guide
card.
Special Instructions:
1. Schedule outage with operating personnel.
2. Schedule PM on associated equipment in conjunction with this guide, i.e., air
cooled condensers, glycol dry coolers, cooling tower, etc.
3. Review manufacturer's instructions and the Standard Operating Procedure for
"Controlling Hazardous Energy Sources."
4. Deenergize, lock-out, and tag electric circuits.
5. Comply with the latest provisions of the Clean Air Act and Environmental
Protection Agency (EPA) regulations as they apply to protection of
stratospheric ozone.
6. No intentional venting of refrigerants is permitted. During the servicing,
maintenance, and repair of refrigeration equipment, the refrigerant must be
recovered.
7. Whenever refrigerant is added or removed from equipment, record the
quantities on the appropriate forms.
8. Recover, recycle, or reclaim the refrigerant as appropriate.
9. If disposal of the equipment item is required, follow regulations concerning
removal of refrigerants and disposal of the equipment.
10. If materials containing refrigerants are discarded, comply with EPA
regulations as applicable.
11. Refrigerant oils to be removed for disposal must be analyzed for hazardous
waste and handled accordingly.
12. Closely follow all safety procedures described in the
Material Safety Data Sheet (MSDS) for the refrigerant and all labels on
refrigerant containers.
Items to Check & Initial Completion:
1. ___ Thoroughly inspect and clean interior and exterior of machine with vacuum
(remove panels).
2. ___ Clean drain pan and note excessive corrosion. Correct as necessary.
3. ___ Check for refrigerant leaks using a halogen leak detector, soap bubbles,
or similar testing device. If leaks are not able to be stopped or
corrected, report leak status to supervisor. Consult the Material Safety
Data Sheets (MSDS) for disposal requirements. Reclaimed and recycled CFCs
are exempt from hazardous waste regulations (Consult 40 CFR Part 261).
4. ___ Check refrigerant levels and recharge if necessary.
5. ___ Check condition of cooling and reheat coils. Use fin comb as needed.
6. ___ Clean coils using detergent solution and warm water if coil is heavily
soiled.
7. ___ Drain and clean humidifier pan or pad, whichever applies. Replace pad if
required. Remove corrosion, prime, and paint as needed.
8. ___ Lubricate motor and fan bearings, if not sealed. Check alignment of motor
and fan. Clean all fans or blowers.
9. ___ Check belt tension and condition. Adjust or replace as required if belt
driven.
10.___ On direct drive units, check set screws on fan shaft to make sure they
are tight.
11.___ Replace filters as needed.
12.___ Check compressor oil level (not on hermetically sealed
units) if compressor is equipped with a sight glass.
13. Run machine. Check action of controls, relays, switches, including fused
disconnect type, etc., to see that:
a.___ compressor(s) run at proper setting.
b.___ reheat coils activate properly (if applicable).
c.___ humidistat activates humidifier (if applicable).
d.___ suction and discharge pressures are proper.
e.___ discharge temperature is set properly.
14.___ Clean up work area.
Tools and Materials:
1. Standard Toolkit
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"
2. Cleaning tools and materials.
3. Vacuum.
4. Fin comb.
5. Grease gun and oiler.
6. Ladder - ceiling mounted units. Check ladder for defects. Do not use
defective ladders.
7. Self sealing quick disconnect refrigerant hose fittings.
8. Refrigerant recovery/recycle unit.
9. EPA/DOT approved refrigerant storage tanks.
10. Safety goggles.
11. Gloves.
12. Approved refrigerant.
13. Electronic leak detector.
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