MIL-HDBK-1130
All loose parts and accessories should be secured to the equipment from which
they were removed to facilitate reactivation. Boiler, furnace, and air
conditioning rooms should be left clean and orderly.
Minimum heat may need to be maintained when it is necessary to
protect valuable machinery, buildings, structure and equipment, interior fire
hose outlets, and working personnel from extreme cold. Minimum air
conditioning may be necessary in extremely hot and humid climates to provide
the same facility, equipment and personnel protection. In the event that heat
or air conditioning is required, fuel and power sources should be maintained.
Heat should not be discontinued until all plumbing fixtures and piping have
been drained and treated with antifreeze. See para. 2.2.3.4.
Provide protection for air conditioning systems withdrawn from
service but not removed to storage. Machined and other surfaces and bearings
should be painted and treated with rust-preventive coatings. Painted interior
and exterior surfaces of casings, structural supports, drain pans of unit
coolers and evaporative condensers, and all other parts of equipment that show
signs of corrosion should be primed and painted. Remove fan wheels and shafts
before painting; distribute evenly paint sprayed on fan wheels casings and
housings should be dismantled sufficiently to allow proper cleaning and
painting, then reassembled. Exercise semi-annually HVAC controls, rotating
equipment, valves, dampers, etc., to prevent corrosion freeze-up.
To prevent contact with paint, bearing surfaces and journals should
be protected with plastic or tape. Fan motors, belts, pumps, usable-pads, and
filters should be removed, cleaned, wrapped, and packed in suitable cartons.
Tension on all belts should be loosened or relieved. All outside exhaust and
intake openings and louvers should be closed, as well as air supply grills and
ducts to buildings. Fans should be blocked to prevent rotation.
Heating Equipment and Piping. Heating equipment and piping
2.2.7.2
withdrawn from service, but not removed, should be protected to inhibit
corrosion, as indicated in para. 2.2.7.3. Boilers, pressure parts, auxiliary
equipment, and all connecting lines should be drained, mud and scale
accumulations washed out, and equipment and lines dried with compressed air.
Connecting lines should be capped or sealed to ensure that boilers remain
absolutely dry; all water remaining in drums or headers should be sponged out.
Clean-out and drain plugs on cast-iron boilers and water heaters should be
removed, and the opening left open and covered with screen to allow full
circulation of air; plugs and caps should be attached with cord or wire near
watersides in dry lay-up. Refer to the manufacturer's instruction on this
subject.
All supply and return lines should be drained of all water or
condensate. If necessary, lines and heaters should be drilled and tapped at
low points to ensure that all water is eliminated. All openings, once drained
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