ADDENDUM NO. 2 CITY OF SAN ANTONIO CAPITAL ...

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HVAC Upgrades – International Center AAI #12-154 9. Illuminated legend indicating "BIOCIDE A" or "BIOCIDE B" when pump is activated. F. Provide water meter on system make-up, wired to control system. G. Provide solution pumps to feed sequestering agent and corrosion inhibitor from solution tank into condenser water supply to tower. Provide agitator in accordance with treatment supplier’s recommendations. H. Provide conductivity controller to sample condenser water and operate 11 inch (275 mm) solenoid bleed valve and piping to blow-down controller. Wire sampler to open when condenser water pump is operating. I. Introduce biocide to tower by intermittent slug feed. J. Provide liquid level switch in each solution tank to de-activate solution pump and agitator, signal BAS; refer to Section 23 09 53. 3.5 DEMONSTRATION A. Furnish sixteen hour training course for operating personnel, instruction to include installation, care, maintenance, testing, and operation of water treatment systems. Arrange course at start up of systems. END <strong>OF</strong> SECTION HVAC WATER TREATMENT 23 25 00 - 7
HVAC Upgrades – International Center AAI #12-154 SECTION 23 64 12 WATER-COOLED WATER CHILLERS - CENTRIFUGAL PART 1 GENERAL 1.1 SUMMARY A. Section includes chiller package, charge of refrigerant and oil, controls and control connections, chilled water connections, condenser water connections, auxiliary water connections, starters, and electrical power connections. (Note: Machines using R123 will not be acceptable.) Basis of Design: Magnetic bearing machine. Deductive Alternate #1 for conventional oil-lubricated machine. B. Related Sections: 1. Section 23 07 00 - HVAC Insulation: Product requirements for insulation for placement by this section. 2. See Drawings for sequences of operation for chillers specified in this section. 3. Section 23 21 13 - Hydronic Piping: Execution requirements for chilled water and condenser water piping specified by this section. 4. Section 23 21 16 - Hydronic Piping Specialties: Product requirements for piping specialties for placement by this section. 5. Section 26 05 03 - Equipment Wiring Connections: Execution requirements for connection to chillers specified by this section. 1.2 REFERENCES A. Air-Conditioning, Heating and Refrigeration Institute: 1. AHRI 550/590 - Water Chilling Packages Using the Vapor Compression Cycle. 2. AHRI 575 – Method of Measuring Machinery Sound Within an Equipment Space. B. American Society of Heating, Refrigerating and Air-Conditioning Engineers: 1. ASHRAE 15 - Safety Code for Mechanical Refrigeration. 2. ASHRAE 90.1 - Energy Standard for Buildings except Low-Rise Residential Buildings. C. American Society of Mechanical Engineers: 1. ASME Section VIII - Boiler and Pressure Vessel Code - Pressure Vessels. D. National Electrical Manufacturers Association: 1. NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum). E. Underwriters Laboratories Inc.: 1. UL 1995 - Heating and Cooling Equipment. WATER-COOLED WATER CHILLERS - CENTRIFUGAL 23 64 12 - 1
Page 1 and 2: ADDENDUM NO. 2 CITY OF SAN ANTONIO
Page 3 and 4: CITY OF SAN ANTONIO DEPARTMENT OF C
Page 5 and 6: Project Name: International Center
Page 7 and 8: HVAC Upgrades - International Cente
Page 45: HVAC Upgrades - International Cente
Page 63 and 64: ADDENDUM #2 06/03/13 MECHANICAL ROO

ADDENDUM NO. 2 CITY OF SAN ANTONIO CAPITAL ...

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