22 31 00_Add03.pdf

TRUAX FIELD ANGB - F-35: ALTER BLDG 406 Addendum 3

XGFG182008 08 MAR 2021

SECTION 22 31 00

WATER SOFTENERS, CATION-EXCHANGE (SODIUM CYCLE)

02/09

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D1067 (2016) Standard Test Methods for Acidity or Alkalinity of Water.

ASTM D1068 (2015) Standard Test Methods for Iron in Water.

ASTM D1126 (2017) Standard Test Method for Hardness in Water.

ASTM D3370 (2018) Standard Practices for Sampling Water from Flowing Process Streams

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-03 Product Data

Softening Equipment

SD-10 Operation and Maintenance Data

Operating and Maintenance Instructions; G

1.3 DELIVERY, STORAGE, AND HANDLING

Protect all equipment delivered and placed in storage from the weather, humidity and temperature variations, dirt and dust, or other contaminants.

1.4 EXTRA MATERIALS

a. Salt for Brine Tanks: Furnish in same form as and at least four times original load, but not less than 2000 lb. Deliver on pallets according to the following:

1. Plain Pellet Salt: In 40- or 50-lb packages.

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PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

a. Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of the products and that essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening. Equipment shall be supported by a service organization that is, in the opinion of the Contracting Officer, reasonably convenient to the site.

b. Pumps and motors shall have the manufacturer's name, address, type or style, model or serial number, and catalog number on a plate secured to the item of equipment.

2.2 SOFTENING EQUIPMENT

Submit a complete list of equipment and material, including manufacturer's descriptive and technical literature; performance charts and curves; catalog cuts; and installation instructions.

2.2.1 Equipment Capacity

Each unit shall be a fully automatic downflow pressure-type water softener, having a capacity to soften 22 gallons of water with a maximum influent total hardness of 120 milligrams per liter (mg/L) during the interval between successive regenerations, to a maximum effluent total hardness of 0 mg/L. Intervals between successive generations shall be 23 hours.

2.2.2 Softener Tank

a. Description: Factory-assembled, pressure-type water softener.

1. Standard: Comply with NSF 61 Annex, "Drinking Water System Components - Health Effects."

2. Configuration: Twin unit with two mineral tanks and one brine tank.

3. Mounting: On equipment pad.

4. Mineral Tanks: FRP, pressure-vessel quality.

(a) Construction: Fabricated and stamped to comply with ASME Boiler and Pressure Vessel Code.

(b) Pressure Rating: 125 psig minimum.

(c) Freeboard: 50 percent minimum for backwash expansion above normal resin bed level.

(d) Upper Distribution System: Single-point, diffuser type.

(e) Lower Distribution System: Hub and radial-arm or header-lateral type; fabricated from nonmetallic pipe and fittings with individual, fine-slotted, non-clogging plastic strainers, and arranged for even flow distribution through resin bed.

(f) Handholes: 4 inches round or 4 by 6 inches elliptical, in

SECTION 22 31 00 Page 2 top head and lower sidewall of tanks 30 inches and smaller in diameter.

(g) Manhole: 11 by 15 inches in top head of tanks larger than 30 inches in diameter.

(h) Liner: PE, ABS, or other material suitable for potable water.

2.2.3 Exchange Material

Exchange material shall be of styrene-resinous type, washed, processed, graded, and suitable for water softening purposes. All granules shall be clean and hard, and the material shall be free from defects that affect the serviceability and appearance of the finished product. Exchange material shall not require dosing or the adding of any chemical mixture or solution to the water to be or to the water used for backwashing or regeneration other than sodium chloride, except for a cleaner additive recommended by the Exchange Material Manufacturer. Material shall conform to the following:

a. Working exchange capacity not less than 20,500 grains per 5lbs .

b. Not more than 1 percent by weight to pass 50-mesh US standard screen.

Bed depth shall not be less than 30 inches. Application rate shall not exceed 2 gpm per cubic foot of exchange material. Minimum freeboard above exchanger bed shall be not less than 50 percent of bed depth.

2.3 BRINE APPLICATION SYSTEM

A brine application system, comprising two tanks, shall be provided for each installation. Where two tanks are furnished, one tank shall serve as a salt saturator tank, and the other as a brine tank. Minimum capacity of the system shall be such as to provide sufficient salt storage for three regeneration cycles or 24-hour operation, whichever is greater.

2.3.1 Tanks

a. Brine Tank: Combination measuring and wet-salt storing system.

1. Tank and Cover Material: Fiberglass, 3/16 inch thick; or molded PE, 3/8 inch thick.

2. Brine Valve: Float operated and plastic fitted for automatic control of brine withdrawal and freshwater refill.

3. Size: Large enough for at least four regenerations at full salting.

2.4 CONTROLS

2.4.1 Programmable Controls

Electronic programmable, fully automatic; factory wired and factory mounted on unit.

a. Adjustable duration of various regeneration steps.

b. Push-button start and complete manual operation.

SECTION 22 31 00 Page 3

c. Electric time clock and switch for fully automatic operation, adjustable to initiate regeneration at any hour of day and any day of week or at fixed intervals.

d. Electronic water meter, adjustable to initiate regeneration according to time clock schedule or by volume override.

2.4.2 Flow Control

Automatic, to control backwash and flush rates over wide variations in operating pressure; does not require field adjustments.

a. Demand-Initiated Control: Each mineral tank of twin mineral-tank unit is equipped with automatic-reset-head water meter that electrically activates cycle controllers to initiate regeneration at preset total in gallons. Head automatically resets to preset total in gallons for next service run. Electrical lockout prevents simultaneous regeneration of both tanks.

2.5 ELECTRICAL WORK

Electrical work shall be as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Manual or automatic control and protective or signal devices required for the operation specified and any control wiring required for controls and devices, shall be provided.

2.6 AUXILIARY EQUIPMENT

2.6.1 Water Testing Sets

Manufaturer's standard water-hardness testing apparatus and chemicals with testing procedure instructions. Include metal container suitable for wall mounting.

2.6.2 Piping

Comply with requirements for piping specified in 22 00 00 PLUMBING, GENERAL PURPOSE. Drawings indicate general arrangement of piping, fittings, and specialties.

2.6.3 Valves and Unions

Install shut-off valves on raw-water inlet and soft-water outlet piping of each mineral tank and on inlet and outlet headers. Metal and plastic valves are specified in 22 00 00 PLUMBING, GENERAL PURPOSE. Exception for water softeners with factory-installed shutoff valves at locations indicated.

2.6.4 Gauges and Cocks

Provide factory installed accessories including piping, valves, tubing, and drains. Provide factory main-operating-valve position indicators.

2.6.5 Water and Brine Testing Equipment

Manufacturer'sstandard water-hardness testing apparatus and chemicals ith testig procedure instructions. Include metal container suitable for wall mounting.

SECTION 22 31 00 Page 4

2.7 FACTORY PAINTING

Factory painting shall conform to manufacturer's standard factory finish for the intended service.

2.8 CHEMICALS

a. Mineral: High-capacity ion-exchange resin that is stable over entire pH range with good resistance to bead fracture from attrition or shock.

b. Salt for Brine Tanks: High-purity sodium chloride, free of dirt and foreign material. Rock and granulated forms are unacceptable.

PART 3 EXECUTION

3.1 EXAMINATION

After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing the work.

3.2 INSTALLATION

3.2.1 Softener and Brine Tanks

Softener and brine tanks shall be anchored to a concrete mat. Anchor brackets, anchor rods or straps shall be provided to hold the tank to the anchors in the mat.

3.2.2 Valves

Install valves as nearly as possible in the position indicated consistent with convenience of operating the hand wheel. Carefully erect and support all valves in their respective position free from all distortion and strain on appurtenances during handling and installation. All material shall be carefully inspected for defects in workmanship and material, and debris and foreign material cleaned out of valve openings and seats, all operating mechanisms operated to check their proper functioning, and all nuts and bolts checked for tightness. Valves and other equipment which do not operate easily or are otherwise defective shall be repaired or replaced.

3.2.3 Piping

Install piping to accurate lines and grades and, where possible, parallel to building walls. Where temporary supports are used, they shall be sufficiently rigid to prevent shifting or distortion of the pipe.

Provision shall be made for expansion where necessary. All piping shall pitch toward low points, and provision shall be made for draining these low points. A sufficient number of unions or flanges shall be used to allow for the dismantling of all water pipe, valves, and equipment. Installation of piping including cleaning, cutting, threading and jointing, shall be in accordance with Section 22 00 00 PLUMBING, GENERAL PURPOSE.

3.3 MANUFACTURER'S SERVICES

3.3.1 Manufacturer's Representative

Provide services by a manufacturer's representative who is experienced in the installation, adjustment, and operation of the equipment specified.

SECTION 22 31 00 Page 5

Representative shall supervise the installing, adjusting, and testing of equipment.

3.3.2 Field Training

Conduct training course for operating staff as designated by the Contracting Officer. The training period, for a total of 1 hours of normal working time, shall start after the system is functionally completed but prior to final acceptance tests. Submit proposed diagrams, field instructions, and other sheets, prior to posting. Framed instructions under glass or in laminated plastic, including wiring and control diagrams showing the complete layout of the entire system, shall be posted where directed. Condensed operating instructions explaining preventive maintenance procedures, methods of checking the system for normal safe operation, and procedures for safely starting and stopping the system shall be prepared in typed form, framed as specified above for the wiring and control diagrams and posted beside the diagrams. The framed instructions shall be posted before acceptance testing of the systems. The field instructions shall cover all of the items contained in the Operating and Maintenance Instructions. Submit 2 complete copies of operating instructions outlining the step-by-step procedures required for system startup, operation and shutdown. The instructions shall include the manufacturer's name, model number, service manual, parts list, and brief description of all equipment and their basic operation features. Submit 2 complete copies of maintenance instructions listing routine maintenance procedures, possible breakdowns and repairs, and troubleshooting guides.

The instructions shall include simplified wiring, layout, and control diagrams of the system as installed.

3.4 TESTING AND PERFORMANCE

After installation of the water softener, operating tests shall be carried out to assure that the water softener system operates properly. If any deficiencies are revealed during any tests, such deficiencies shall be corrected and the tests reconducted.

3.4.1 Softeners

Engage a factory-authorized service representative to perform startup service. Complete installation and start up chekcs according to manufactuer's written instructions. Add water to brine tanks and fill with salt.

a. Sample water softener effluent after startup and at three consecutive seve-day intervals (total of four samples) and prepare certified test reports for required water perfomrnace characteristics. Comply with

1. ASTM D859

2. ASTM D1067

3. ASTM D1068

4. ASTM D1126

5. ASTM D1129

6. ASTM D3370

b. Supply the salt required for regeneration of the exchange material after each of the above test runs. Under actual operating conditions the exchange material shall not be washed out of the apparatus, the turbidity and color of the soft water shall not exceed the turbidity and color of the hard water, and during any softening run, slugs of

SECTION 22 31 00 Page 6 dirty or turbid water shall not be delivered regardless of the change of demand rate up to the maximum on the apparatus. During the specified test of the softener, the soft-water sampling cock shall remain open and a stream of softened water shall be run through a rubber hose, discharging at the bottom of a wide mouth, 1 gallon glass jar or bottle set against a white background so that the color and turbidity may be under observation at all times. Amount of salt used for regeneration shall not exceed 5 pounds per 20,500 grains hardness of equivalent calcium carbonate removed.

3.4.2 Piping

After installation, test all pipelines for watertightness. For these tests furnish testing plugs or caps, all necessary pressure pumps, pipe connections, gauges, other equipment, and all labor required. Test pressures shall be indicated in the process pipe schedule shown. Test of joints of air lines shall be made using a soapy water solution to detect leaks. The obtaining of water, electric power and other utility items as well as the disposal of water drainage are also the responsibilities of Contractor. Submit test reports in booklet form showing all field tests performed to adjust each component and all field tests performed to prove compliance with the specified performance criteria, upon completion and testing of the installed system. Each test report shall indicate the final position of controls.

3.5 FIELD PAINTING

Equipment which did not receive a factory finish shall be painted as specified in Section 09 90 00 PAINTS AND COATINGS. Factory painted items requiring touching up in the field shall be thoroughly cleaned of all foreign material and shall be primed and top-coated with the manufacturer's standard factory finish.

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