SECTION 23 25 00 HVAC WATER TREATMENT 1. All pre

SECTION 23 25 00
HVAC WATER TREATMENT
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
This Section includes the following HVAC water-treatment systems:
1.
2.
3.
1.3
Bypass chemical-feed equipment.
Glycol feed equipment
HVAC water-treatment for closed loop systems.
SCOPE
A.
Provide a complete and working water treatment system as herein
B.
The water treatment supplier shall provide the following services:
1.
2.
3.
4.
5.
6.
All pre-operational system cleanout chemicals.
Chemical feed equipment as described herein.
All necessary test equipment for control of chemicals.
Instruct the Contractor on pre-cleaning procedures.
Instruct the Contractor on the installation of the feed equipment.
Provide training for the operating personnel.
7.
Provide one year field service and consultation which will include monthly service visits
with written test results, recommended adjustments, and a written report to the Owner.
Provide one year supply of chemical treatment.
Provide laboratory testing of samples as needed.
System start-up assistance.
8.
9.
10.
C.
Provide a chemical treatment system for all closed loop hot water, and chilled water systems.
D.
Contractor shall include the cost of chemicals and a Service Contract as described below.
1.4
SUBMITTALS
A.
HVAC water treatment system
B.
Operation and maintenance data
C.
test results and service reports.
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1.5
COORDINATION
A.
The HVAC contractor shall coordinate pre-operational cleaning with the water treatment
supplier.
B.
The HVAC contractor shall coordinate piping requirements for chemical feed
systems with the water treatment supplier.
C.
Coordinate power requirements for water treatment system with the Electrical
Contractor.
1.6
EXTRA MATERIALS
A.
1.7
Furnish one (1) year supply of chemicals to maintain all systems.
EXTENDED SERVICE
A.
Provide a one year service and training program as included in the
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
2.2
Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
1.
Aqua Science
2.
Nalco
3.
Betz
4.
HVAC Chemical
5.
Aqualine
MANUAL CHEMICAL-FEED & FILTER EQUIPMENT
A.
Bypass Feeders & Filter: Steel, with corrosion-resistant exterior coating, minimum 3-1/2-inch fill
opening in the top, and NPS 3/4 bottom inlet and top side outlet. Quarter turn or threaded fill
cap with gasket seal and diaphragm to lock the top on the feeder when exposed to system
pressure in the vessel.
1.
2.
2.3
Capacity: 2 gal.
Minimum Working Pressure: 125 psig.
AUTOMATIC GLYCOL-FEED EQUIPMENT
A.
Water Meter:
1.
2.
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AWWA C700, oscillating-piston, magnetic-drive, totalization meter.
Body: Bronze.
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23 25 00 - HVAC WATER TREATMENT
3.
4.
5.
B.
Glycol Solution Tanks:
1.
2.
3.
C.
Maximum Pressure Loss at Design Flow: 3 psig.
Registration: Gallons or cubic feet.
Controls: Flow-control switch with normally open contacts; rated for maximum 10 A, 250V ac; and that will close at adjustable increments of total flow.
Chemical-resistant reservoirs fabricated from high-density opaque polyethylene with
minimum 110 percent containment vessel.
Molded cover with recess for mounting pump.
Capacity: 30 gal.
Glycol Solution Injection Pumps:
1.
2.
3.
4.
5.
Self-priming, positive-displacement; rated for intended chemical with minimum 25 percent
safety factor for design pressure and temperature.
Adjustable flow rate.
Metal and thermoplastic construction.
Built-in relief valve.
Fully enclosed, continuous-duty, single-phase motor. Comply with requirements in
Division 23 Section "Common Motor Requirements for HVAC Equipment."
D.
Glycol Solution Tubing: Copper tubing with compression fittings and joints.
E.
Chilled water system to be 33% glycol.
PART 3 - EXECUTION
3.1
WATER ANALYSIS
A.
3.2
Perform an analysis of supply water to determine quality of water available at Project site.
INSTALLATION
A.
Install chemical application equipment per manufacturer’s installation instructions.
units so devices that require servicing are accessible.
B.
Furnish and install all mounts, piping, tubing and valves necessary to install the complete
operable water treatment system as shown on the drawings and under the supervision of the
chemical company.
C.
Bypass Feeders: Install in closed hydronic systems, including hot-water heating, and equipped
with the following:
1.
2.
3.
4.
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Arrange
Install bypass feeder in a bypass circuit around circulating pumps, unless otherwise
indicated on Drawings.
Install water meter in makeup water supply.
Install a gate or full-port ball isolation valves on inlet, outlet, and drain below feeder inlet.
Install a swing check on inlet after the isolation valve.
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D.
Upon acceptance, the Contractor shall inform the Owner in writing as to the treatment applied
during start-up and testing. The Contractor shall state specifically the chemicals used and the
quality of the fluids in the systems, which shall include:
1.
2.
3.
4.
5.
6.
7.
Total hardness
Alkalinity
pH
Dissolved solids
Suspended solids
Sodium sulfite
Phosphonate
E.
In all locations where chemicals are dispensed, provide safety data sheets in “see-thru-folder”
and posted in visible work area. Chemical supplier shall provide all special safety equipment
required for handling chemicals.
F.
Furnish a sufficient one year supply of chemicals to maintain all systems free of corrosion,
scale, and biological growth. Chromates will not be accepted.
3.3
CONNECTIONS
A.
Piping installation requirements are specified in other Division 23 Sections. Drawings indicate
general arrangement of piping, fittings, and specialties.
B.
Install piping adjacent to equipment to allow service and maintenance.
C.
Make piping connections between HVAC water-treatment equipment and dissimilar-metal piping
with dielectric fittings. Dielectric fittings are specified in Division 23 Section "Common Work
Results for HVAC."
D.
Install shutoff valves on HVAC water-treatment equipment inlet and outlet. Metal general-duty
valves are specified in Division 23 Section "General-Duty Valves for HVAC Piping."
E.
Refer to Division 22 Section "Domestic Water Piping Specialties" for backflow preventers
required in makeup water connections to potable-water systems.
3.4
SERVICE AND DEMONSTRATION
A.
Furnish a one year service program by a qualified service person performing service on a full
time basis. Service calls will be no less than one per month, but as often as required to keep all
systems in balance. Service shall include supervision of installation of the feed equipment and
start up of the systems when notified. A minimum of a four hour training program will be
provided for the maintenance personnel within 30 days of start up of the systems and as
needed thereafter even if dictated by turnover of personnel. Response to emergency calls shall
be within 24 hours. Records of service calls shall be available for review.
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