140P2022R0019-0006_Att01b_NewSpec232500-WaterTreatment_220317_0006.pdf
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- Solicitation number
- 140P2022R0019
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This specification document outlines requirements for water treatment services and equipment for a federal construction project to replace chillers and cooling towers at Independence National Historical Park in Philadelphia, Pennsylvania. The project involves replacing critical components of two chillers and one cooling tower, replacing one failing chiller and cooling tower, and replacing two failing cooling towers. The specification requires a water treatment vendor to provide chemicals, equipment, cleaning, treatment, and ongoing maintenance services for the closed and open water systems. Responsibilities include initial cleaning and treatment, monthly service visits for the warranty period, water analysis and record keeping, and a proposed agreement for continued maintenance after the warranty expires.
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Text version
INDE – 236306 23 25 00 - 1
03172022 Water Treatment
SECTION 23 25 00 – WATER TREATMENT
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specifications, apply to this Section.
1.2 SUBMITTALS
A. Product Data: Submit manufacturer's technical product data including rated capacities of selected equipment clearly indicating water pressure drops, weights, installation and start-up instructions, and furnished specialties and accessories.
B. Chemicals: Submit data on all chemicals to be used, including material data safety sheets.
C. Shop Drawings: Submit manufacturer's assembly type shop drawings indicating dimensions, weight loadings, required clearances, and methods of assembly of components.
D. Wiring Diagrams: Submit manufacturer's electrical requirements for power wiring to water treatment equipment. 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. Seismic Control Data: Submit all required information by the Delegated Design Professional in responsible charge of design for Seismic Controls for this project. Where specification section
23 05 48, “Wind, Seismic, and Vibration Controls for Mechanical Systems” does not indicate any required seismic controls, no such submittal is required.
F. Closeout Submittals: Submit Operating and Maintenance (O&M) data and parts lists for each item of equipment, control, and accessory; including "trouble-shooting" maintenance guide. Include chemical data and material data safety sheets.
1.3 QUALITY ASSURANCE
A. Qualifications:
1. A single water treatment company shall be responsible for all products and services. This company shall be a recognized specialist in the field of industrial water treatment with full-time personnel available to the contractor.
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2. The water treatment equipment, chemical, and service supplier shall have been active in the field of commercial/industrial water treatment for not less than five years and shall have full-time service personnel located within the trading area of the job site.
1.4 MAINTENANCE
A. Chemical Treatment Service:
1. Chemical Treatment for Systems: The water treatment vendor shall provide sufficient chemicals to treat all specified systems for the entire warranty period based on the type of duty that the systems are operating under.
2. Provide service calls at least once a month, or more often when necessary, from one month prior to turnover until the end of the warranty period. Service calls shall include complete chemical treatment services for all systems being treated. Some of the specific services to be performed are as follows:
a. Check chemical feed pumps for proper operation and settings.
b. Check to see that the electronic water control systems are operating properly.
c. Check all coupons at least every other month for excessive corrosion. Replace coupons and alter treatment when indicated.
d. Check for proper water treatment results in all systems being treated.
e. Check for proper chemical usage (keep chemical usage to a minimum).
f. Change biocide monthly on towers when not automatic.
g. Perform water analysis on the different waters being serviced. Log the test results, pump settings, chemical usage, etc., in a 3-ring binder that is to be kept at job site.
h. Add chemical to closed systems when required.
3. Written chemical test reports and recommendations shall be made at each visit with one copy to the Owner's designated representative and one copy to the Engineer.
B. Extended Maintenance Service: Agreement to Maintain: Prior to expiration of Contractor's warranty, submit a proposed "Agreement for Continued Service and Maintenance of Water
Treatment Systems" to the Owner, for Owner's possible acceptance. Offer terms and conditions for furnishing chemicals and providing continued testing and servicing, including replacement of materials and equipment, for one-year periods with option to renew annually.
PART 2 - PRODUCTS
2.1 CHEMICALS
A. Closed Water Systems: A buffered corrosion inhibitor shall be provided to initially treat the closed systems listed above. This treatment must contain steel and copper corrosion inhibitors and a polymer dispersant/scale inhibitor.
B. Open Systems:
1. Provide a non-phosphate, non-chromate formula containing organic corrosion inhibitors, polymeric dispersants and antifoulants, sequesterants and wetting agents, and copper and steel corrosion inhibitors for the control of mineral scale and corrosion within the open systems listed above.
2. Provide two (alternating) biocides for the control of algae growths and slime bacteria in the open systems listed above.
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3. Chemicals and biocides shall contain no heavy metals, shall be non-carcinogenic, and shall be selected for minimal environmental impact.
C. Cleaning Materials: Provide heavy duty cleaning materials as necessary to remove dirt and/or oily deposits from all new piping systems and/or equipment.
D. Chemicals shall be acceptable to the EPA, state, and local agencies.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install all equipment in strict accordance with manufacturer's instructions. Locate equipment such that it is readily accessible for service. Refer to Division 23 Section "Common Work Results for
HVAC" for additional requirements.
B. Refer to Division 23 Section 23 05 29 "Hangers and Supports for Mechanical Systems" for additional installation requirements.
3.2 CLEANING
A. Cleaning of Pipe Lines and Treating Water:
1. The water treatment vendor shall be responsible for furnishing the proper chemicals and supervising the cleaning of all HVAC water systems and providing specified treatment for such systems.
2. The systems to be cleaned shall first be flushed and then chemically cleaned per Division 23
Section "Common Work Results for HVAC." In closed systems with filter feeders, the filter shall be backwashed as required to remove solids that have been cleaned from the system.
Dispose of the treatment water in accordance with state, federal and wastewater district regulations.
3. At the end of the cleaning period, the alkalinity of the system shall be reduced to that of the raw water and then the system shall be chemically treated as previously specified. In no case shall the system being cleaned be left in an untreated condition for more than 8 hours.
4. The water treatment contractor shall certify in writing that the system was cleaned and treated in conformance with the specifications.
3.3 EVAPORATIVE EQUIPMENT STARTUP
A. Provide a water treatment program for start-up of stainless steel cooling towers per the manufacturer’s recommendations.
END OF SECTION 23 25 00
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