Under 25 Tons Man Hours 18
26-50 Tons Man Hours 26
51-75 Tons Man Hours 34
76-100 Tons Man Hours 42
101-150 Tons Man Hours 50
This applies to chilled water producing units that are self-contained, consisting
of refrigeration compressors, air cooled condenser, chilled water coils,
refrigerant receivers, fan and motor, etc., contained in a common housing or
assembly.
Special Instructions:
1. If necessary, schedule shutdown with operating personnel.
2. Review manufacturer's instructions.
3. Deenergize, lock out, and tag electrical circuits serving motor when
applicable.
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 item.
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.
13. Remove access covers prior to accomplishing check points.
Items to Check & Initial Completion:
1. Condenser.
a.___ Remove debris from air screen and clean underneath unit.
b.___ Pressure wash coil with proper cleaning solution.
c.___ Straighten fin tubes with fin comb.
d.___ Check electrical connections for tightness. Check fused disconnect
switches for condition and operation.
e.___ Check mounting for tightness.
f.___ Check for corrosion. Clean and treat with inhibitor as needed.
g.___ Clean fan blades.
h.___ Inspect pulleys, belts, couplings, etc.; adjust tension and tighten
mountings as necessary. Change badly worn belts. Multi-belt drives
should be replaced with matched sets.
i.___ Perform required lubrication and remove old or excess lubricant.
2. Compressor(s).
a.___ Lubricate drive coupling.
b.___ Lubricate motor bearings (non-hermetic).
c.___ Check and correct alignment of drive couplings.
d.___ Inspect evaporator tubes for scale. Clean if required. Leak test
tubes using a halogen leak detector or suitable substitute.
e.___ Add refrigerant per manufacturer's instructions if needed.
f.___ Check compressor oil level.
g.___ Run machine; check action of controls, relays, switches, etc. to see
that:
(1).___ Compressor(s) run at proper settings.
(2).___ Suction and discharge pressures are proper.
(3).___ Outlet water temperature is set properly.
h.___ Check and adjust vibration eliminators. Replace as necessary.
3. Controls.
a.___ Check operation of all relays, pilot valves, and pressure regulators.
b.___ Check resulting action of pressure sensing primary control elements
such as diaphragms, bellows, inverted bells, and similar devices when
activated by air, water, or similar pressure.
4. Motors.
a.___ Check ventilation ports for soil accumulations; clean if necessary.
b.___ Clean exterior of motor surfaces of soil accumulation.
c. Lubricate bearings according to manufacturer's recommendations.
(1).___ Remove filler and drain plugs (use zerk fittings if installed).
(2).___ Free drain hole of any hard grease (use piece of wire if
necessary).
(3).___ Add grease. Use good grade lithium base grease unless otherwise
specified.
d.___ Check motor windings for accumulation of soil. Blow out with low
pressure air or vacuum as needed.
e.___ Check hold-down bolts and grounding straps for tightness.
f.___ Remove tags, start unit, and check for vibration or noise.
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"
Insulated pliers and screwdrivers
Wire strippers
Wire crimpers
Voltmeter - Ohmmeter - Milliammeter
Clamp on meter(volt - ohm - amp meter)
Soldering kit
1/8" 25' fish tape
Burnishing tool
2. Pressure washer
3. Fin comb
4. Paint brushes
5. Cleaning materials and equipment. Consult the Material Safety Data Sheets
(MSDS) for hazardous ingredients and proper personal protective equipment
(PPE).
6. Respirator
7. Safety goggles.
8. Gloves.
9. Self sealing quick disconnect refrigerant hose fittings
10. Refrigerant recovery/recycle unit
11. EPA/DOT approved refrigerant storage tanks.
12. Approved refrigerant.
13. Electronic leak detector.
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