Under 10 Tons Man Hours 3
Over 10 Tons Man Hours 6
Application:
This applies to those packaged type air conditioning machines that are
equipped with chilled water coils or direct expansion coils on split systems.
The other portion of the split system, i.e., a refrigeration condensing unit (PM
CONDSRUR-A), or a packaged type chilled water unit (PM CHILLRWTRCCC-Q), is to be
serviced in conjunction with this PM activity.
Special Instructions:
1. Review manufacturer's instructions.
2. A/C machine maintenance should be scheduled to coincide with condensing unit
or package chiller maintenance as noted above.
3. Comply with the latest provisions of the Clean Air Act and Environmental
Protection Agency (EPA) regulations as they apply to protection of
stratospheric ozone.
4. No intentional venting of refrigerants is permitted. During the servicing,
maintenance, and repair of refrigeration equipment, the refrigerant must be
recovered.
5. Whenever refrigerant is added or removed from equipment, record the
quantities on the appropriate forms.
6. Recover, recycle, or reclaim the refrigerant as appropriate.
7. If disposal of the equipment item is required, follow regulations concerning
removal of refrigerants and disposal.
8. If materials containing refrigerants are discarded, comply with EPA
regulations as applicable.
9. Refrigerant oils to be removed for disposal must be analyzed for hazardous
waste and handled accordingly.
10. 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. Treat rusted areas with
rust inhibitor. Ensure that the rust inhibitor chemical does not add
volatile organic compounds or contaminants to the drain pan. If
possible, rinse well after application or choose a less hazardous
material. Consult the chemicals Material Safety Data Sheet (MSDS) for
this information.
3. Chilled water units:
___ Check for chilled water leaks on all lines, valves, strainers, coils,
etc. If leaks are not able to be stopped or corrected, report leak
status to supervisor.
___ Clean strainer on chilled water unit.
Direct expansion units:
___ Check for refrigeration leaks on all lines, valves, fittings, coils,
etc., using a halogen leak detector or similar testing device. If
leaks are not able to be stopped or corrected, report leak status to
supervisor.
4. ___ Check condition of cooling and reheat coils. Use fin comb if need to
straighten fins.
5. ___ Clean coils. Use detergent solution and warm water if coil is heavily
soiled.
6. ___ Drain and clean humidifier pan or pad, whichever applies. Replace pad if
required. Remove corrosion as needed.
7. ___ Clean and lubricate motor and squirrel cage fan(s). Check alignment of
motor and fan. Check bearings for excessive wear.
8. ___ Check belt tension and condition. Adjust or replace as required.
9. ___ Replace pre-filters if needed.
10.___ Replace final filter if needed.
11. Run machine, check action of controls, relays, switches, etc., to see
that:
a. Chilled water units:
(1).___ Chilled water valve(s) are operating properly.
(2).___ Reheat coils activate properly.
(3).___ Humidistat activates humidifier.
(4).___ Valves regulating water pressure are proper on cooling.
(5).___ discharge air temperature is set properly.
(6).___ Check and record chilled water inlet and outlet
temperatures.
b. Direct expansion units:
(1).___ Humidistat activates humidifier.
(2).___ Reheat coils activate properly.
(3).___ Discharge air temperature is set properly.
12.___ Check and adjust vibration eliminator mountings if equipped. Repair or
replace if required.
Tools and 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"
2. Cleaning tools, grease gun, oil and materials. Consult the MSDS for
hazardous ingredients and proper personal protective equipment (PPE).
3. Vacuum
4. Fin comb
5. Filters
6. Spare V-belts
7. Self-sealing quick disconnect refrigerant hose fittings, if applicable.
8. Refrigerant recovery/recycling unit, if applicable.
9. EPA/DOT approved refrigerant storage tanks.
10. Safety goggles
11. Gloves
13. Approved refrigerant.
14. Electronic leak detector.
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