DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS

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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation

SECTION 15545

CHEMICAL WATER TREATMENT

PART 1 - GENERAL

1.1SUMMARY

1.1.1.Section Includes:

  1. Cleaning of piping systems.
  2. Chemical feeder equipment.
  3. Chemical treatment.

1.1.2.Related Sections:

  1. Section 01042 - Mechanical, Refrigeration, Food Service Equipment and Electrical Coordination.
  2. Section 01400 - Quality Control.
  3. Section 01720 – [Phased Turnover and] Contract Closeout.

1.1.3.Products Furnished But Not Installed Under This Section:

A.Section 15510 Hydronic Piping: Placement of water coupon rack, bypass (pot) feeder.

1.2QUALITY CONTROL

1.2.1.The following publications form a part of this specification to the extent they are applicable:

  1. Section 01400 – Quality Control.

1.3SUBMITTALS

  1. Submit under provisions of Section 01400.
  2. Product Data: Provide chemical treatment materials, chemicals, and equipment including and connection requirements.
  3. Manufacturer's Installation Instructions: Indicate placement of equipment in systems, piping configuration, and connection requirements.
  4. Manufacturer's Field Reports: Indicate startup of treatment systems when completed and operating properly. Indicate analysis of system water after cleaning and after treatment.
  5. Submit certificate of compliance from authority having jurisdiction indicating approval of chemicals and their proposed disposal.
  6. Operation and Maintenance data.

1.4OPERATION AND MAINTENANCE DATA

  1. Operation and Maintenance Data: Include data on chemical treatment programs. Include step by step instructions on test procedures including target concentrations.
  2. The Contractor shall submit all certifications and testing data as a supplement to previously submitted O & M manuals at contract closeout.

1.5QUALIFICATIONS

  1. Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum three years experience. Company shall have local representatives with water analysis laboratories and full time service personnel.
  2. Installer: Company specializing in performing the work of this section with minimum three years experience and approved by manufacturer.

1.6REGULATORY REQUIREMENTS

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  1. Conform to applicable code for addition of nonpotable chemicals to building mechanical systems, and to public sewage systems.

1.7MAINTENANCE SERVICE

  1. Furnish service and maintenance of treatment systems for one year from Date of Substantial Completion.
  2. Provide technical service visits to perform field inspections and make water analysis on site six months and eleven months after completion. Detail findings in writing on proper practices, chemical treating requirements, and corrective actions needed. Submit two copies of field service report after each visit.
  3. Provide laboratory and technical assistance services during this maintenance period.
  4. Include two hour training course for operating personnel, instructing them on installation, care, maintenance, testing, and operation of water treatment systems. Arrange course at start up of systems.
  5. Provide on site inspections of equipment during scheduled or emergency shutdown to properly evaluate success of water treatment program, and make recommendations in writing based upon these inspections.

PART 2 - PRODUCTS

2.1MATERIALS

2.1.1.System Cleaner:

  1. Liquid alkaline compound with emulsifying agents and detergents to remove grease and petroleum products; sodium tripoly phosphate and sodium molybdate

2.1.2.Closed System Treatment (Water):

  1. Sequestering agent to reduce deposits and adjust pH; polyphosphate.
  2. Corrosion inhibitors; liquid boronnitrite, sodium nitrite and borax, sodium totyltriazole, low molecular weight polymers, phosphonates, sodium molybdate, or sulphites.
  3. Conductivity enhancers; phosphates or phosphonates.

2.2BYPASS (POT) FEEDER

  1. 1.8 gal (6.8L) quick opening cap for working pressure of 175 psig (1200 kPa).

2.3TEST EQUIPMENT

  1. Provide white enamel test cabinet with local and fluorescent light, capable of accommodating 4 10 ml zeroing titrating burettes and associated reagents.
  2. Provide test kits for all treatment programs.

2.4CORROSION TEST COUPON RACKS

  1. Provide 4 test specimen coupons.

2.5PROPYLENE GLYCOL

***Verify required concentration.

  1. Fill the circulating water systems with a solution of 30% inhibited ethylene glycol and 70% water.

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PART 3 - EXECUTION

3.1PREPARATION

  1. Systems shall be operational, filled, started, and vented prior to cleaning. Use water meter to record capacity in each system.
  2. Place terminal control valves in open position during cleaning.

3.2CLEANING SEQUENCE

  1. Concentration:
  2. Hot Water Heating Systems:

(1)Apply heat while circulating, slowly raising temperature to 160 degrees F (71 degrees C) and maintain for 12 hours minimum.

(2)Remove heat and circulate to 100 degrees F (37.8 degrees C) or less; drain systems as quickly as possible and refill with clean water.

(3)Circulate for 6 hours at design temperatures, then drain.

(4)Refill with clean water and repeat until system cleaner is removed.

  1. Chilled Water Systems:

(1)Circulate for 48 hours, and then drain systems as quickly as possible.

(2)Refill with clean water, circulate for 24 hours, then drain.

(3)Refill with clean water and repeat until system cleaner is removed.

  1. Use neutralizer agents on recommendation of system cleaner supplier.
  2. Flush glycol filled closed systems with clean water for one hour minimum. Drain completely and refill.
  3. Remove, clean, and replace strainer screens.
  4. Inspect, remove sludge, and flush low points with clean water after cleaning process is completed. Include disassembly of components as required.

3.3INSTALLATION

  1. Install in accordance with manufacturer's instructions.

3.4CLOSED SYSTEM TREATMENT

  1. Provide one bypass feeder on each system. Install isolating and drain valves and necessary piping. Install around balancing valve downstream of circulating pumps unless indicated otherwise.
  2. Introduce closed system treatment through bypass feeder when required or indicated by test.
  3. Provide 3/4 inch (19 mm) water coupon rack around circulating pumps with space for 4 test specimens.

END OF SECTION

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