15752 Add 2.DOC

Interior Renovations at U.S. Courthouse

GSA Number: GS-03P-98-CDC-0019

Pittsburgh, Pennsylvania

Copyright 2003 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

SECTION 15752

HUMIDIFIERS

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

B. Related Sections include the following: Refer to specification 15910 Commissioning for additional requirements.

1.2 SUMMARY

A. This Section includes the following humidifiers:

1. Steam injection.

1.3 DEFINITION

Retain definition that remains after this Section has been edited.

A. Low Voltage: As defined in NFPA 70 for circuits and equipment operating at less than 50 V or for remote-control, signaling power-limited circuits.

1.4 SUBMITTALS

A. Product Data: Include rated capacities, operating characteristics, furnished specialties, and accessories.

B. Shop Drawings: Detail fabrication and installation of humidifiers. Include piping details, plans, elevations, sections, details of components, manifolds, and attachments to other work.

1. Wiring Diagrams: Power, signal, and control wiring.

Retain paragraph and subparagraphs below if Drawings do not include detailed plans or if Project involves unusual coordination requirements.

C. Coordination Drawings: Detail humidifiers and adjacent equipment. Show support locations, type of support, weight on each support, required clearances, and other details, drawn to scale, on which the following items are shown and coordinated with each other, based on input from installers of the items involved:

1. Structural members to which humidifiers will be attached.

2. Size and location of initial access modules for acoustical tile.

Retain first paragraph below if Contractor is responsible for field quality-control testing.

D. Field quality-control test reports.

E. Operation and Maintenance Data: For humidifiers to include in operation and maintenance manuals.

1.5 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. Comply with ARI 640, "Commercial and Industrial Humidifiers."

1.6 COORDINATION

A. Coordinate location and installation of humidifiers with manifolds in ducts and air-handling units or occupied space. Revise locations and elevations to suit field conditions and to ensure proper humidifier operation.

PART 2 - PRODUCTS

2.1 STEAM-INJECTION HUMIDIFIERS

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and products. Retain one of three paragraphs and list of manufacturers below. See Division 1 Section "Product Requirements."

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Armstrong International, Inc.

2. DRI-STEEM Humidifier Company.

3. Herrmidifier.

4. Hygromatik; Spirax Sarco, Inc.

5. Nortec Industries Inc.

Retain one of first two paragraphs and associated subparagraphs below. Retain first for duct-mounting or plenum-mounting humidifier, second if humidifier discharges directly into occupied space.

B. Manifold: ASTM A 666, Type 304 stainless steel, steam jacketed and extending the full width of duct or plenum with mounting brackets at ends.

C. Discharge Nozzle :

1. Steam-jacketed discharge nozzle.

D. Steam Separator: Cast iron with humidifier control valve.

E. Humidifier Control Valve:

Retain one of two subparagraphs below.

1. Actuator: Electric modulating with spring return.

2. Actuator: As specified in Division 15 Section "HVAC Instrumentation and Controls."

F. Steam Trap: Inverted-bucket type, sized for a minimum of 3 times the maximum rated condensate flow of humidifier at 1/2-psig (3.4-kPa) inlet pressure.

G. Accessories:

Delete first two subparagraphs below if humidistats and aquastat are specified in Division 15 Section "HVAC Instrumentation and Controls."

1. Return-duct-mounting humidistat.

2. Duct-mounting, high-limit humidistat.

3. In-line strainer.

4. Airflow switch for preventing humidifier operation without airflow.

If Project has more than one type or size of humidifier, delete paragraph and subparagraphs below and schedule humidifiers on Drawings.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine ducts, air-handling units, and conditions for compliance with requirements for installation tolerances and other conditions affecting performance.

B. Examine roughing-in for piping systems to verify actual locations of piping connections before humidifier installation.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Install humidifiers with required clearance for service and maintenance.

B. Seal humidifier manifold duct or plenum penetrations with flange.

C. Install humidifier manifolds in metal ducts and casings constructed according to SMACNA's "HVAC Duct Construction Standards, Metal and Flexible."

D. Install stainless-steel drain pan under each manifold mounted in duct.

1. Construct drain pans to comply with ASHRAE 62.

2. Connect to condensate trap and drainage piping.

3. Extend drain pan upstream and downstream from manifold a minimum of 24 inches (600 mm) or as recommended by manufacturer.

Retain paragraph below for self-contained, heated-pan, and heat-exchanger humidifiers.

E. Install manifold supply piping pitched to drain condensate back to humidifier.

Retain paragraph below for steam-injection and heat-exchanger humidifiers.

F. Install drip leg upstream from steam trap a minimum of 12 inches (300 mm) tall for proper operation of trap.

Retain first three paragraphs and associated subparagraphs below for gas-fired, self-contained or heat-exchanger humidifiers, or others that may be floor mounted.

Retain paragraph below if authorities having jurisdiction require seismic anchors and restraints.

3.3 CONNECTIONS

Coordinate piping installations and specialty arrangements with schematics on Drawings and with requirements specified in piping systems. If Drawings are explicit enough, these requirements may be reduced or omitted.

A. Piping installation requirements are specified in other Division 15 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

1. Install piping adjacent to humidifiers to allow service and maintenance.

Retain subparagraph below for all humidifier types except steam injection.

2. Install shutoff valve, strainer, backflow preventer, and union in humidifier makeup line.

B. Install electrical devices and piping specialties furnished by manufacturer but not factory mounted.

Retain first four paragraphs below for gas-fired, self-contained humidifiers.

C. Install piping from safety relief valves to nearest floor drain.

D. Ground equipment according to Division 16 Section "Grounding and Bonding."

E. Connect wiring according to Division 16 Section "Conductors and Cables."

3.4 FIELD QUALITY CONTROL

Retain one of first two paragraphs below. Retain first paragraph to require a factory-authorized service representative to perform inspections, tests, and adjustments.

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections. Report results in writing.

Retain paragraph and subparagraph below to require Contractor to perform tests and inspections.

B. Perform tests and inspections and prepare test reports.

Retain subparagraph below to require a factory-authorized service representative to assist Contractor with inspections, tests, and adjustments.

1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

Retain first paragraph and subparagraphs below to describe tests and inspections to be performed by either of the entities in two paragraphs above.

C. Tests and Inspections:

1. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

2. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

D. Remove and replace malfunctioning units and retest as specified above.

3.5 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain humidifiers. Refer to Division 1 Section "Demonstration and Training."

END OF SECTION 15752

October 26, 2010

Addendum 2 15752 - 2 Humidifiers