SECTION 15813

STEAM GRID HUMIDIFIERS

PART 1 GENERAL

SECTION INCLUDES

Dry Steam Humidifiers.

Steam Jacketed Distribution Manifolds.

Electrode Steam Humidifiers.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section 15952 - Controls and Instrumentation: Installation of humidistats.

Section 16180 - Equipment Wiring Systems: Installation of humidistats.

RELATED SECTIONS

Section 15410 - Plumbing Piping: Connecting of water and drain services.

Section 15520 - Steam and Steam Condensate Piping: Connection of steam.

Section 15952 - Controls and Instrumentation: Installation of humidistats.

Section 16180 - Equipment Wiring Systems: Installation of Humidistats and wiring of unit.

REFERENCES

ARI 610 - Central System Humidifiers.

ARI 630 - Selection, Installation and Servicing of Humidifiers.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [_____.]

Product Data: Provide catalog data indicating rated capacity, dimensions, duct and service connections, electric nameplate data and wiring diagrams.

OPERATION AND MAINTENANCE DATA

Submit operation data under provisions of Section [01700.]

[01730.]

Include manufacturer's descriptive literature, operating instructions, installation instructions, maintenance and repair data, and parts listing.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

WARRANTY

Provide [two] [_____] year warranty under provisions of Section [01700.] [01740.]

Warranty: Include coverage for humidifier unit except the cylinder.

EXTRA MATERIALS

Submit maintenance materials under provisions of Section [01700.] [_____.]

Provide [two] [_____] of humidifier cylinders under provisions of Section [01700.] [_____.]

PART 2 PRODUCTS

MANUFACTURERS

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

[___________________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [_____.]

DRY STEAM HUMIDIFIERS

Humidifier: ARI 610; steam separator type receiving steam at supply pressure and providing separation ahead of control valve, discharging through internal drying and silencing chambers, and distribution manifold at atmospheric pressure.

Performance: Rated capacity of [_____] lbs/hr ([_____] kg/hr) when provided with steam at [_____] psi ([_____] kPA).

Body: Cast iron with integral metering valve, separating and drying chambers, and silencing chamber with stainless steel silencing medium.

Separating Chamber: To disengage and remove water droplets and particle matter when operated at maximum capacity.

Control Valve: Steam jacketed parabolic plug, capable of modulating flow of steam over entire stroke of operator with [pneumatic] [modulating electric] [solenoid electric] operator.

Internal Drying and Silencing Chambers: To receive steam at atmospheric pressure and jacketed by steam at supply pressure.

Distribution Manifold: To provide uniform distribution over entire length, and jacketed by steam at supply pressure, with full length stainless steel internal silencing screen.

Controls: Temperature switch before steam trap to prevent humidifier from operating before start-up condensate is drained.

Model: [__________], manufactured by [_______________.]

ELECTRODE STEAM HUMIDIFIERS

Humidifier: [ARA 610] self contained, disposable cylinder, microprocessor controlled electrode steam generating unit.

Performance: Rated capacity of [_____] lbs/hr ([_____] kw) of steam output when provided with net input.

Cylinders: [Disposable] [Cleanable], polypropelene plastic with field adjustable steel electrodes.

Plumbing Components and Valve Bodies: Plastic, linked by flexible rubber hosing. Incorporate water fill with 1 inch (25 mm) air gap and integral air gap on drain. Fill solenoid valve shall incorporate built-in strainer, pressure reducing and flow regulating orifice.

Cabinet: Steel, 16 gage (1.5 mm) with enamel finish, with hinged and lockable access door.

Electric Service: Unit protected by internal fusing on line voltage leads and automatic emergency drain trigger. Incorporate electrical terminals for installation of humidistat, duct high-limit humidistat, interlock to fan or air flow switch.

Control: Fully modulating control to provide gradual 0 to 100 percent capacity. Maximum capacity shall be field adjustable for 0 to 100 percent. High water probe shall prevent overfilling. Multiple cylinder humidifiers shall have duplicate internal control circuitry to allow each cylinder to be independently controlled.

Drain Cycle: Field adjustable with a drain duration range of 2 to 128 seconds and a drain interval range of 0.25 to 16 hours, with one drain valve for each generator.

Steam Distributor: Stainless steel steam dispersion tube suitable for insertion in duct with condensate separator and return leg to remove condensate from distributor and return to humidifier fill. Steam hose from generator to dispersion tube shall be 1-1/2 inch (30 mm) diameter reinforced rubber.

Display: Digital, providing select monitoring of unit amperage draw, percentage demand from humidistat, steam output, and manually set capacity adjustment. Lamps to indicate full cylinder.

Model: [__________], manufactured by [_______________.]

Humidistat: [Wall] [Duct] [Cabinet] mounted, solid state electronic sensor, 24 volt.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Install to ARI 630.

Provide galvanized steel rods to support distribution manifolds and mount in air system plenums.

Connect dry steam humidifiers to steam supply and to condensate piping. Provide gate valve, inlet strainer, and inverted bucket steam trap. Refer to Section 15520 and Section 15525.

SCHEDULES

Drawing_Code	HU-1	HU-2	HU-3

Manufacturer

Model

Capacity

Input

Orifice Size

END OF SECTION