WATER TREATMENT SYSTEM
Guide Specification
PART 1 - GENERAL
1.1. Description
1.1.1
a.
b.
c.
d.
e.
1.1.2
a.
b.
c.
d.
1.1.3
a.
b.
c.
d.
Work includes :
Furnish all labor, materials, tools, equipment and services for condenser water treatment system as
indicated, in accordance with provisions of the Contract Documents.
Completely coordinate with work of all other trades.
See Division 1 for General Requirements.
Services of manufacturer’s representative company to provide automatically-controlled water treatment
programs and equipment as specified herein.
Provide chemical treatment and supervision for condenser water treatment program, together with the
necessary chemicals, designed to minimize corrosion, scale formation and biological growth in the
condenser water piping system.
Description of System:
Riser mounted, scale and corrosion inhibitor feeder by equipment manufacturer.
Unit mounted Bio~Control Feeder by equipment manufacturer.
Solid, time released chemicals as specified below.
Factory mounted (by equipment manufacturer) conductivity controller and bleed valve as specfied
below.System to be self draining.
Related Sections:
Special Mechanical Requirements
Hydronic Piping Systems: Section
Closed Circuit Cooler or Evaporative Condenser
Electrical
GUIDE SPECIFICATION SMART SHIELD WATER TREATMENT SYSTEM
1.2. Submittals (See Division 1)
Submit per the requirements Division 1.:
1.2.1
a.
b.
Shop Drawings: Show all water treatment equipment, including the following:
Piping diagrams of all factory mounted components (show all field piping required, if any)
Conductivity Control panel and wiring diagrams (show all field wiring required). Include bill of materials
showing model number, manufacturer, physical layout drawings, panel and equipment catalog cuts, and list
of recommended spare parts.
1.2.2
Operation and Maintenance Manuals: Include testing procedures for each of the treated systems.
1.2.3
List of Chemicals and Methods to be used for each system: Use generic names. Provide Material Safety
Data Sheets (MSDS) for each chemical used.
1.2.4
Laboratory Make-up Water Sample Analyses: Submit a copy of the project site Make-up water analysis to
document the water quality available at the project site. Make-up water test analysis to include at a
minimum the analysis of the following compositions of the water:







Calcium Hardness (as ppm CaCO3)
Total Hardness (as ppm CaCO3)
Total Alkalinity or m-Alkalinity (as ppm CaCO3)
pH
Silica (as SiO2)
Specific Conductivity (μS/cm)
Sulfate (as SO4)


Chloride (as Cl )
Phosphate (as PO4)
-
1.3. Quality Assurance
1.3.1
a.
b.
c.
1.3.2
2
The water treatment supplier shall:
Obtain water samples from the site and furnish a laboratory analysis of the water supply with submittal.
Review the make-up water analysis to ensure compatibility with the water treatment program.
Propose water treatment methods and appropriate chemicals required to minimize scale, corrosion and
biological growth, and submit all of the above with Shop Drawings and other required submittals.
Methods and chemicals selected shall comply with all the requirements of the European REACH
legislation on chemicals and any applicable local laws and approvals for chemicals.
GUIDE SPECIFICATION SMART SHIELD WATER TREATMENT SYSTEM
1.4. Performance Criteria
1.4.1
Maintain the following conditions in the water systems listed below:
Parameter
Z-725 Galvanised Steel
Type 304 SST
Type 316 SST
pH
pH during passivation
Total Suspended Solids
Conductivity (μS/cm)
Alkalinity in CaCO3 (ppm)
Calcium Hardness CaCO3 (ppm)
Chlorides in Cl- (ppm)
Silcates (ppm)
Total bacteria (kve/ml)
7.0-8.8
7.0-8.0
< 25
< 2400
75-400
50-500
< 300
< 150
< 10000
6.0-9.5
N/A
< 25
< 4000
< 600
< 600
< 500
< 150
< 10000
6.0-9.5
N/A
< 25
< 5000
< 600
< 600
< 2000
< 150
< 10000
Corrosion : Less than or equal to 3.0 mpy of carbon steel
1.4.2
a.
3
Biological Control:
A solid biocide treatment program shall be initiated when the condenser water system is first filled with
water and shall be administered on a regular basis thereafter in accordance with the supplier’s
instructions.System shall be inspected whenever 10,000 cfu/ml of total heterotrophic bacteria are found
and corrective action taken.
GUIDE SPECIFICATION SMART SHIELD WATER TREATMENT SYSTEM
PART 2 - PRODUCTS
2.1. Water Treatment System
2.1.1
Acceptable Products:
a.
Equipment manufacturer and Water Treatment Services:
 EVAPCO
 Baltimore Aircoil Company
 Marley ( SPX)
 ...
b.
Chemical Feed & Control Equipment:
 Factory mounted inhibitor feeder
 Factory mounted biocide feeder
 Factory mounted conductivity controller,belimo bleed valve and torodial probe.
2.1.2
a.
b.
c.
d.
e.
f.
2.1.3
a.
Chemicals:
Chromates, zinc, or any liquid chemicals shall not be used.
Scale and corrosion inhibitors shall be non-toxic to humans and animals for the intended use and for
general storage and handling as required by the application.
Phosphates are allowed as permitted by local authorities.
Scale and corrosion inhibitors will be solid dry product with time released polymer coating for safe handling
and easy reloading.
The automatic chemical feed equipment shall operate and feed chemicals into each system only when the
system is operating.
Biocides shall be dry products fed thru factory mounted feeders and reloaded such that handling of the dry
chemistry directly is not required.
Condenser Water System:
Chemical Feeding and Control Equipment - Condenser System: Provide the following apparatus (including
all factory piping and wiring):
a.1. One (1) factory mounted assembly for controlling conductivity and providing automatic chemical
treatment to the condenser water systems. The assembly system shall have the following features and
capabilities:
I.
II.
III.
IV.
4
Conductivity Monitor: Shall provide linear, temperature compensated measurements
directly in microohms over full scale. There will be a range of measurement provided, 100
to 3,000 microoohms. Conductivity measurement will be displayed on a LED display.
Power switch, set point adjustment, test button, indicating lights and indicating meter
shall be front panel mounted for easy access. The controller shall be insensitive to phase
angle shifts and be capable of operating with input line voltage of 220 volts AC, without
affecting accuracy.
Inhibitor Feed: Inhibitor chemical will be fed directlly from unit riser pipe. A solid
chemistry inhibitor shall be used with time released control mechanism. No pumps, timers
or liquids shall be accepted.
Biocide Feed: Biocide chemical feeds will be controlled by a factory mounted feeder. Solid
biocide will be fed directly into the recirculating stream. No pumps, timers or liquids shall
be accepted.
Basis of design –Evapco Smart Shield feeders and controller.
GUIDE SPECIFICATION SMART SHIELD WATER TREATMENT SYSTEM
a.2. The conductivity monitor, chemical feeders and sample stream piping assembly shall be mounted on
the closed circuit cooler or evaporative condenser. All components of the package system shall be
pre-plumbed and pre-wired to form an operational and ready to install system. The package system
shall consist of the following:
I.
II.
III.
IV.
2.1.4
One (1) sample stream piping assembly consisting of:
 Two (2) ¾-inch inlet/outlet shut-off valves.
 One (1) conductivity probe of PVC construction, with a temperature compensating
torodial probe mounted in the sample stream.
One (1) pre-piped bleed-off piping assembly consisting of inlet shut-off valve, sample
valve, throttling valve and motorized ball valve. Bleed-off piping assembly shall be sized to
provide the proper bleed-off rate of the system.
One (1) Factory mounted solid chemical inhibitor feeder, shall be provided for feed of the
scale/corrosion inhibitor. Feed rate shall be adjustable based on a multiple chamber
feeder arrangement.
One (1) Factory mounted solid biocide chemical feeder, shall be provided for feed of the
biocide. Feeder shall be completely factory mounted for easy commissioning and refill.
Water Treatment Chemicals - Condenser System:
Furnish 1-year supply of the recommended formulas for control of scale and corrosion in the open
recirculating system. As well as 1- year supply of biocide for prevention of microbiological growth in the
same system. One year supply based on calculated estimate of chemicals likely to be consumed during the
first year of operation based on site make-up quality. Biocide products recommended shall be properly
registered with the the requirements of the European REACH legislation on chemicals and any applicable
local laws and approvals for chemicals. To ensure operator safety, all chemical products shall be provided in
dry form for direct addition from shipping container to factory mounted feeders.
2.1.5
a.
b.
c.
5
Testing Equipment : Furnish basic water equipment, spare reagents for maintaining control of program
standards in the condenser water systems. Test kits will include the following :
Reagents and apparatus for determination of corrosion inhibitor level in the condenser water systems.
Reagents and apparatus for determination of pH, P & M alkalinity,hardness and chlorides.
Apparatus for determination of microbiological colony population and biocide effectiveness.
GUIDE SPECIFICATION SMART SHIELD WATER TREATMENT SYSTEM
PART 3 - EXECUTION
3.1. Installation and Services
3.1.1
a.
b.
c.
d.
e.
f.
g.
3.1.2
6
Provide all consulting services, for a period of 1-year from start-up of the cooling system, which will
include:
Installation and system start-up procedure recommendations.
Pre-operation system clean-out procedure supervision.
Initial water analysis and recommendations.
Training of operating personnel on proper feeding and control techniques.
Monthly field service and consultation meetings.
Any necessary log sheets and record forms.
Any required laboratory and technical assistance.
All services will be provided by a qualified, full-time representative of the evaporative condenser or
closed circuit cooler manufacturer.