SECTION 15526 IDENTIFICATION FOR HVAC SYSTEMS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.

SECTION 15526 IDENTIFICATION FOR HVAC SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. Identification of all HVAC products installed under Division 15.

B. Painting of HVAC piping and supports.

1.2 REFERENCES

A. American National Standards Institute (ANSI):
1. ANSI/ASME:  Scheme for the Identification of Piping Systems.


PART 2 - PRODUCTS

2.1 MATERIALS - IDENTIFICATION SYSTEMS

A. Color:  Unless specified otherwise, conform with ANSI/ASME A13.1.

B. Snap On Plastic Pipe Markers:  Manufacturer's standard preprinted, semi rigid snap on, color coded pipe markers, conforming to ASME A13.1

C. Plastic Duct Markers: Manufacturer's standard laminated plastic, color-coded duct markers. Conform to following color code:
1. Green:  Cold air.
2. Yellow:  Hot air.
3. Yellow/Green:  Supply air.
4. Blue: Exhaust, outside, return, and mixed air.
5. For hazardous exhausts, use colors and designs recommended by ASME A13.1
6. Nomenclature:  Include following:
a. Direction of airflow.
b. Duct service (supply, return, exhaust, etc.).

D. Plastic  Equipment  Markers: Laminated  plastic,  color  coded  equipment  markers: Conform to following color code:
1. Green:  Cooling equipment and components.
2. Yellow:  Heating equipment and components.
3. Yellow/Green:  Combination cooling and heating equipment and components.
4. Blue: Equipment and components that do not meet any of the above criteria.
5. For  hazardous  equipment,  use  colors  and  designs  recommended  by  ASME A13.1.
6. Nomenclature:  Include following, matching terminology on schedules as closely as possible:
a. Name and plan number.

b. Equipment service.
7. Size: Approximately 2½ by 4 inches (65 by 100 mm) for control devices, dampers, and valves; and 4½ by 6 inches (115 by 150 mm) for equipment.

E. Lettering and Graphics: Coordinate names, abbreviations, and other designations used in mechanical identification, with corresponding designations indicated. Use numbers, letter, and wording indicated for proper identification and operation/maintenance of mechanical systems and equipment.

2.2 MATERIALS - PAINT SYSTEMS

A. Acceptable Manufacturers
1. Tnemec.
2. Carbolene.
3. Or equal.

B. Painting Systems
1. Application on metal piping and pipe and equipment supports:
a. Non-submerged, normal conditions, indoors.
b. Generic Type:  Polyamidoamine epoxy.
c. Finish Coat: Tnemec Series 69.
d. Interior: Two coats Series 69.
e. Exterior:  One coat Series 69, one coat Series 74.
f. Primer Coat:  Self priming.
g. Minimum Dry Mil Thickness: 5 to 8 mil.
h. Surface Preparation:  Hand tool clean.


PART 3 - EXECUTION

3.1 GENERAL

A. Where more than one type of mechanical identification is specified for listed application, selection is installer's option, but provide single selection for each product category.

B. Degrease and clean surfaces to receive adhesive for identification materials.

3.2 LABELING AND IDENTIFYING

A. Piping Systems: Install pipe markers on each system. Include arrows showing normal direction of flow.
1. Plastic markers:  Install on pipe insulation segment where required for hot non- insulated pipes.

2. Locate pipe markers wherever piping is exposed in finished spaces, equipment rooms, accessible maintenance spaces (shafts, tunnels, plenums), and exposed exterior locations as follows:
a. Near each valve and control device.

b. Near each branch, excluding short take offs for fixtures and terminal units. Mark each pipe at branch, where flow pattern is not obvious.
c. Near locations where pipes pass through walls, floors, ceilings, or enter inaccessible enclosures.
d. At access doors, manholes, and similar access points that permit view of concealed piping.
e. Near   major   equipment   items   and   other   points   of   origination   and termination.
f. Spaced at a maximum of 50 foot (15 m) intervals along each run.  Reduce intervals to 25 feet (7.5 m) in congested areas of piping and equipment.
g. On piping above removable acoustical ceilings, except omit intermediately spaced markers.

B. Equipment: Install engraved plastic laminate sign or equipment marker on or near each major item of mechanical equipment. Do not label equipment such as cabinet heaters and ceiling fans in occupied spaces.

1. Lettering Size: Minimum ¼ inch (6 mm) high lettering for name of unit where viewing distance is less than 2 feet (0.6 m), ½ inch (13 mm) high for distances up to 6 feet (1.8 m), and proportionately larger lettering for greater distances. Provide secondary lettering 1/2 to ¾ of size of principal lettering.

2. Text of Signs: Provide text to distinguish between multiple units,  inform operator of operational requirements, indicate safety and emergency precautions, and warn of hazards and improper operations, in addition to name of identified unit.

C. Duct Systems: Identify air supply, return, exhaust, intake, and relief ducts with duct markers; or provide stenciled signs and arrows, showing duct system service and direction of flow.

1. Location: In each space where ducts are exposed or concealed by removable ceiling system, locate signs near points where ducts enter into space and at maximum intervals of 50 feet (15 m).

D. Adjusting: Relocate identifying devices, which become visually blocked by work of this Division or other Divisions.

3.3 PAINTING

A. Color Coding and Labeling of Piping and Equipment - The following color code shall be applied for all new piping installed as part of this project exposed to view:
1. Natural gas/LP piping (interior) – yellow; (exterior) - grey
2. Exposed HVAC mechanical equipment hangers and supports: grey.

B. Protection of Finished Work and Equipment
1. Protect with tarpaulin or drop cloth all floors, walls, glass, finished painted work, and equipment from paint spatter or other damage that might result from this Work.

2. Promptly remove all oil, paint, and solvent waste rags from the site and legally dispose of them. Do not burn waste materials.
3. Paint, varnish, and mixing cans shall not be placed on bare floors.
4. Dirty, oily, and dusty cover shall not be used.
5. No stains or spots shall remain after completion of painting.  Remove hardware accessories, light fixtures, and similar items before painting.
a. Replace above items after finish coat is applied.
b. Masking may be utilized in lieu of removal of items.

C. Application
1. Application  may  be  by  brushing  or  rolling. Method  used  shall  be  one  as approved by material manufacturer for any one particular product.
2. Brushing:  Brush in one direction then smooth at right angles to original brushing to produce a uniform thickness of coating.
3. Thickness of Coating:  Where number of coats is indicated, it is intended to show the normal practice to obtain the proper dry mil thickness.
4. The dry mil film thickness must be provided in all cases even though it may require additional coatings to that specified.  Contractor must provide adequate ventilation at all times.

D. Ventilation shall be adequate to remove fumes, preventing injury to workmen, or possibility of accumulating volatile gases.

E. Contractor to provide one can (quart size) of touch up paint for each color used to Owner.


END OF SECTION