July 22, 1994

Contract \# TW0592

**SPECIAL SPECIFICATION**

**SECTION 15810**

**[HUMIDIFIERS]{.underline}**

[Page]{.underline}

**[PART 1 - GENERAL]{.underline}**

1.01 Description. 2

1.02Related Work. 2

1.03Quality Assurance. 3

1.04References. 3

1.05Submittals.. 3

1.06Delivery, Storage, and Handling.. 4

**[PART 2 - PRODUCTS]{.underline}**

2.01Acceptable Manufacturers. 5

2.02 Materials.. 5

2.03 Jacketed Dry Steam Humidifiers.. 5

**[PART 3 - EXECUTION]{.underline}**

3.01 Inspection. 7

3.02 Installation/Application/Erection. 7

3.03 Field Quality Control.. 8

3.04 Commissioning\... 8

**SPECIAL SPECIFICATION**

**SECTION 15810**

**[HUMIDIFIERS]{.underline}**

**[PART 1 - GENERAL]{.underline}**

**1.01 [DESCRIPTION]{.underline}**

> A. This section describes the physical and performance requirements of
> humidifiers to be provided.
>
> B. Include the following humidifier types:
>
> 1\. Steam to steam evaporative humidifier.
>
> C. Refer to other Division-15 sections for piping, ductwork,
> specialties, etc., required external to humidifiers for installation.
>
> D. Provide the following electrical work as work of this section,
> complying with requirements of Division-16 sections:
>
> 1\. Control wiring between field-installed controls, indicating
> devices, and humidifier control panels.
>
> a\. Control wiring specified as work of Division-15 for Automatic
> Temperature Controls is work of that section.

**1.02 [RELATED WORK]{.underline}**

> A. Section 01300
>
> B. Section 15010
>
> C. Section 15051
>
> D. Section 15401
>
> E. Section 15891
>
> F. Section 15995

**1.03 [QUALITY ASSURANCE]{.underline}**

> A. Test and rate humidifiers in accordance with ARI 620 \"Standard for
> Self-Contained Humidifiers\".
>
> B. Install humidifiers in accordance with ARI 630 \"Standard for
> Selection, Installation, and Servicing of Humidifiers\".
>
> C. Provide electrical components required as part of humidifiers,
> which are listed and labeled by Underwriter\'s Laboratories (UL) and
> comply with National Electrical Manufacturer\'s Association (NEMA)
> Standards.
>
> D. Comply with National Fire Protection Association (NFPA) 70,
> \"National Electrical Code\" as applicable to installation and
> electrical connections of ancillary electrical components of
> humidifiers.

**1.04 [REFERENCES]{.underline}**

> A. ARI 620, Standard for Self-Contained Humidifiers.
>
> B. ARI 630, Standard for Selection, Installation, and Servicing of
> Humidifiers.
>
> C. UL and NEMA Standards.
>
> D. NFPA 70, National Electrical Code.

**1.05 [SUBMITTALS]{.underline}**

> A. Make submittals according to this Section, Section 15010, and
> Section 01300.
>
> B. Submit manufacturer\'s technical product data, including rated
> capacities of selected model clearly indicated, weights, installation
> and start-up instructions, and furnished specialties and accessories.
>
> C. Submit manufacturer\'s assembly-type shop drawings indicating
> dimensions, weight loadings, required clearances, and methods of
> assembly of components.
>
> D. Submit manufacturer\'s electrical requirements for power supply
> wiring to humidifiers. Submit manufacturer\'s ladder-type wiring
> diagrams for interlock and control wiring. Clearly differentiate
> between portions of wiring that are factory-installed and portions to
> be field-installed.
>
> E. Submit maintenance data and parts list for each humidifier,
> control, and accessory; including \"trouble-shooting\" maintenance
> guide. Install this data, product data, shop drawings, and wiring
> diagrams in maintenance manual; in accordance with Section 01300.

**1.06 [DELIVERY, STORAGE, AND HANDLING]{.underline}**

A. See Section 15010.

**[PART 2 - PRODUCTS]{.underline}**

**2.01 [ACCEPTABLE MANUFACTURERS]{.underline}**

> A. Provide humidifiers of one of the following:
>
> 1\. Dri-Steem Humidifier Co.
>
> 2\. Herrmidifier Co., Inc.
>
> 3\. Spirax Sarco.

**2.02 [MATERIALS]{.underline}**

> A. Except as otherwise indicated, provide packaged humidifiers and
> ancillary equipment with manufacturer\'s standard materials and
> components as indicated by published product information, designed and
> constructed by manufacturer, and as required for complete
> installation.

**2.03 [JACKETED DRY STEAM HUMIDIFIERS]{.underline}**

> A. General: Provide evaporative, single-tube, dry steam humidifiers as
> indicated on the Drawing Schedule and specified herein.
>
> B. Vaporizing chamber, cover and fittings shall be constructed of
> stainless steel with heli-arc welded seams. Vaporizing chamber cover
> and/or front clean-out plate shall be easily removable for access to
> the vaporizing chamber for physical removal of mineral buildup.
>
> C. Heat exchanger shall be constructed of stainless steel with
> heli-arc welded seams and teflon coated. The design of the exchanger
> shall be two alternately spaced paralleled rows of tubes between a
> supply and return header.
>
> D. Electronic water level control system shall provide for automatic
> refill of the humidifier. System shall consist of:
>
> 1\. A water level sensing unit comprised of three coated stainless
> steel probes screwed into a threaded probe head. Probe head shall
> incorporate probe isolation skirts and be mounted on the face plate of
> the vaporizing chamber.
>
> 2\. A solenoid operated fill valve factory mounted on the face plate.
>
> 3\. An electronic level control board mounted and wired in the control
> panel.
>
> E. Surface skimmer shall be provided which is field adjustable to
> provide for optimum mineral removal with minimum water waste.
>
> F. Appropriate number and length of inverted U-Tubes shall be provided
> for (H-2) steam dispersion into duct. U-Tube shall allow for mounting
> the humidifier directly under the duct or inside an air handler. Tubes
> shall be constructed of 1 1/2 in. O.D. stainless steel tubing and
> shall be fitted with two rows of high temperature inserts arranged to
> discharge the stream in a V-pattern. Each insert shall extend through
> and into the center of the dispersion tube and incorporate a properly
> sized calibrated orifice. Cover of the humidifier shall be fitted with
> matching connections so the U-Tube can be connected with the provided
> sections of vapor hose and stainless steel hose clamps. Two-piece
> escutcheon plates for sealing duct openings around the U-Tubes shall
> be provided.
>
> G. The control cabinet shall be factory mounted on humidifier.
> Sub-panel shall be enclosed in a UL listed JIC enclosure and contain a
> control circuit transformer, 120 V power block, numbered terminal
> strip, electronic level control board and interconnecting wiring.
>
> H. Valve shall be a normally closed modulating type with modified
> linear flow characteristics and electronic actuator. Valve trim shall
> be stainless steel.
>
> I. Humidifier shall be provided with a float and thermostatic trap and
> a steam supply line strainer.
>
> J. Motor driven brass bodied drain valve shall be factory mounted and
> wired. Timer and drain controls shall be incorporated into electronic
> level control system which provides for drain and flush at timed
> intervals. Frequency and duration of drain shall be field adjustable.
>
> K. Humidifiers (H-1, 2, &3) shall be supplied with appropriate
> quantity of vapor hose kits which allow for remote mounting of the
> humidifier. Each kit shall consist of one 20 ft. section of 1 1/2 in.
> I.D. reinforced vapor hose, two stainless steel hose clamps, a
> two-piece escutcheon plate and one 1 1/2 in. O.D. stainless steel
> dispersion tube. Dispersion tube shall extend the width of the duct
> and shall be fitted with two rows of high temperature inserts arranged
> to discharge the steam in V-pattern. Each insert shall extend through
> and into the center of the dispersion tube and incorporate a properly
> sized calibrated orifice.
>
> L. Diaphragm operated, air flow proving switch shall be provided for
> field installation. Switch shall have an adjustable control point
> range of 0.05 in. W.C. to 12 in. W.C. and be rated for 1/4 H.P. at 125
> VAC.
>
> M. Humidifier shall be covered with 3/4 in. thick rigid foam duct
> insulation. Insulation shall be covered with reinforced aluminum foil.
> All surfaces except front panel shall be covered.

**PART 3 - EXECUTION**

**3.01 [INSPECTION]{.underline}**

> A. Inspect areas and conditions under which humidifiers are to be
> installed. Do not proceed with work until unsatisfactory conditions
> have been corrected in manner acceptable to Installer.

**3.02 [INSTALLATION/APPLICATION/ERECTION]{.underline}**

> A. Install humidifier, vaporizing chamber, and vapor hose where
> indicated, in accordance with equipment manufacturer\'s written
> instructions, and with recognized industry practices, to ensure that
> evaporative humidifiers comply with requirements and serve intended
> purposes.
>
> B. Provide access space around humidifiers for service as indicated,
> but in no case less than that recommended by manufacturer.
>
> C. Provide supports from substrate for humidifiers as indicated and in
> accordance with manufacturer\'s installation instructions.
>
> D. Install electrical devices furnished by manufacturer but not
> specified to be factory-mounted. Furnish copy of manufacturer\'s
> wiring diagram submittal to Electrical Installer.
>
> 1\. Verify that electrical wiring installation is in accordance with
> manufacturer\'s submittal and installation requirements of Division-16
> sections. Do not proceed with equipment start-up until wiring
> installation is acceptable to equipment Installer.
>
> E. See Section 15891. Provide air-tight seal at each penetration of
> humidifiers into ductwork. Provide access door as recommended by
> manufacturer for service.
>
> F. See Section 15051. Provide separate valved branch to supply
> humidifier from top of dripped steam runout.
>
> G. Provide electrical equipment ground for electrically-operated
> humidifiers and components.
>
> H. Upon completion of installation and prior to initial operation,
> test and demonstrate that air humidification equipment is leak-tight.
>
> I. Repair or replace air humidification equipment as required to
> eliminate leaks, and retest as specified to demonstrate compliance.

**3.03 [FIELD QUALITY CONTROL]{.underline}**

> A. Start-up humidifiers in accordance with manufacturer\'s
> instructions.
>
> B. Clean factory-finished surfaces. Repair any marred or scratched
> surfaces with manufacturer\'s touch-up paint.

**3.04 [COMMISSIONING]{.underline}**

> A. Provide labor, material, equipment, etc., required to facilitate
> the commissioning process. Perform form tests and verification
> procedures required by the commissioning process when requested by the
> Commissioning Authority and directed by the General Contractor. See
> Section 15995.
>
> END OF SECTION