CONSTRUCTION STANDARD SPECIFICATION

SECTION 15189

[CHEMICAL TREATEMENT FOR HYDRONIC SYSTEMS]{.underline}

Page

[[PART 1 - GENERAL 2]{.underline}](#general)

[1.01 SUMMARY 2](#summary)

[1.02 quality assurance 2](#quality-assurance)

[1.03 submittals 3](#submittals)

[PART 2 - PRODUCTS 3](#products)

[2.01 CHEMICALS -- CONDENSER WATER SYSTEMS
3](#chemicals-condenser-water-systems)

[2.02 CHEMICALS -- CLOSED WATER SYSTEMS
3](#chemicals-closed-water-systems)

[2.03 EQUIPMENT REQUIREMENTS 4](#equipment-requirements)

[2.04 EQUIPMENT REQUIRED -- CLOSED WATER SYSTEMS
4](#equipment-required-closed-water-systems)

[PART 3 - EXECUTION 5](#execution)

[3.01 SUPERVISION 5](#supervision)

[3.02 CLEANING AND START-UP PROCEDURES - GENERAL
5](#cleaning-and-start-up-procedures---general)

[3.03 cleaning, pretreatment and start-up PROCEDURES - CONDENSER Water
system 5](#__RefHeading___Toc100976550)

[3.03.1 GENERAL INFORMATION 5](#general-information)

[3.03.2 CLEANING AND FLUSHING PROCEDURE
6](#cleaning-and-flushing-procedure)

[3.03.3 FINAL TREATMENT PROCEDURE 6](#final-treatment-procedure)

[3.04 CLEANING AND START-UP PROCEDURES -- CLOSED LOOP WATER SYSTE
7](#__RefHeading___Toc100976554)

[3.05 DOCUMENTATION 8](#documentation)

CONSTRUCTION STANDARD SPECIFICATION

SECTION 15189

[CHEMICAL TREATEMENT FOR HYDRONIC SYSTEMS]{.underline}

# [GENERAL]{.underline} {#general .SECTION-1}

## SUMMARY  {#summary .SECTION1.01}

A.  Section Includes: Hydronic piping system flush and clean procedures
    and chemical water treatment systems including applicable equipment,
    piping, tubing, interconnection components, electrical controls,
    water treatment materials, chemical test equipment and cleaning
    chemicals for cleaning and maintaining treatment of the following
    mechanical systems.

    1.  Hot water boilers and heating water systems.

    2.  Chillers and chilled water systems.

    3.  Cooling towers and condenser water systems.

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A.  Related Documents:

    1.  Drawings and general provisions of the Contract, including
        General Conditions and Division 1.

    2.  Where contradictions occur between this Section and Division 1,
        the more stringent of the two shall apply. The SNL Water
        Treatment Engineer or SDR shall determine which is most
        stringent.

## quality assurance {#quality-assurance .SECTION1.01}

A.  Installing Contractor shall follow the procedures herein, unless
    alternative procedures are pre-approved by SDR and SNL Water
    Treatment Engineer.

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B.  SNL will provide sufficient chemicals and testing reagents for the
    initial cleaning, start-up and passivation of all systems.

    1.  The SNL Water Treatment Engineer and/or Mechanical Systems
        Engineer will provide direction for proper control equipment and
        controls sequencing.

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    1.  SNL will provide testing services and/or equipment, for
        measurement of water quality parameters during cleaning and
        flushing process.

    2.  SNL will provide MSDS (Material Safety Data Sheets) for all
        Sandia furnished chemicals.

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B.  SNL will take over the care of chemical treatment of the systems as
    soon as piping systems commissioning is complete or substantial
    completion is achieved, which ever comes first.

C.  Refer to standard drawing MP5013STD.dgn for direction on closed
    water treatment systems equipment and piping installation.

D.  Provide to SDR the name of the competent person who will be
    injecting the cleaning and water treatment chemicals.

E.  If a system must be drained for any reason, it shall be treated
    immediately upon being refilled. Contact SCO for water treatment
    chemicals immediately should this happen.

## submittals {#submittals .SECTION1.01}

A.  Submit according to Specification 1330 "Submittals Procedures",
    indicating specific chemical treatment products and equipment.

    1.  Submit operation and maintenance data on all control equipment,
        chemical feed pumps, timers, water meters, and other applicable
        equipment including a spare parts list and local suppliers as
        appropriate.

# [PRODUCTS]{.underline}  {#products .SECTION-1}

## CHEMICALS -- CONDENSER WATER SYSTEMS {#chemicals-condenser-water-systems .SECTION1.01}

A.  SNL will provide a scale and corrosion inhibitor (CW8590 or CW8600)
    to aid in the general cleanliness of the recirculating water.

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F.  SNL will provide an oxidizing biocide (SB6300) in liquid form to
    minimize bacterial activity in the condenser system.

G.  If necessary, SNL will provide a non-oxidizing biocide (AQ7423) in
    liquid form to minimize algal growth. The SNL Water Treatment
    Engineer will advise on this issue.

## CHEMICALS -- CLOSED WATER SYSTEMS {#chemicals-closed-water-systems .SECTION1.01}

A.  Contact SCO (inspector) at least two weeks prior to hydrotesting
    systems to insure chemicals are onsite for pre-treatment and
    post-treatment. For chemical treatment calculations, have the system
    Design Engineer provide an approximate hydronic system volume.

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H.  For initial cleaning of the system, SNL will provide a liquid
    alkaline cleaner (CL483).

I.  SNL will provide a scale and corrosion inhibitor (CS4015) for final
    treatment.

## EQUIPMENT REQUIREMENTS {#equipment-requirements .SECTION1.01}

A.  All water meters, sample piping, conduit and wire, pot feeders, and
    valves are contractor furnished and installed. Feed tanks, pumps,
    chemical treatment panels and other equipment specific to the
    chemical treatment program are SNL furnished and installed by
    contractor.

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J.  The chemical feed tanks and panel shall be located such that there
    is easy access for maintenance personnel. Minimum floor space is 5
    ft by 9 ft for the tanks. Panel shall not be installed directly
    above the tanks. Typical panel size is 4 ft tall by 8 ft wide. Panel
    may be installed on a wall or floor mounted system, however proper
    bracing is necessary.

K.  Provide ¾" sample line from a weld-o-let on each of the cooling
    tower pipes. The weld-o-let shall be located on the side or top of
    the pipe. This line will be routed to the chemical treatment panel
    area and terminated with a ball valve at 8 ft above the finished
    floor. Provide insulation and/or heat tape if routed outside or on a
    perimeter wall. Avoid trapping water in outdoor piping and slope
    piping to provide self drainage when systems are non-operational.
    Final connections to chemical treatment panel will be done by
    others.

    1.  Provide ¾" copper sample line from cooling tower return pipe.

    2.  Provide ¾" PVC (sch80) sample line from cooling tower supply
        pipe.

## EQUIPMENT REQUIRED -- CLOSED WATER SYSTEMS  {#equipment-required-closed-water-systems .SECTION1.01}

A.  Provide a separate chemical by-pass feeder for each closed water
    system. See standard drawing MP3013STD.dgn for details. The feeder
    shall be either a 1-gal (FF-50) or a 5-gal Efficiency Dynamics
    (FF-100) filter feeder capable of: an operating pressure of up to
    200°F, and flow up to 40 gpm with a maximum initial pressure drop of
    3 psi. The feeder shall contain a stainless steel fiber bag screen,
    with polypropylene replacement bag filter. Size as specified in the
    construction drawings.

# [EXECUTION]{.underline}  {#execution .SECTION-1}

##  SUPERVISION {#supervision .SECTION1.01}

A.  Installation, start-up and testing of chemical water treatment
    systems must be witnessed by the SDR and /or SNL water treatment
    personnel. Contractor shall provide sign-off sheets for all stages
    as necessary

## CLEANING AND START-UP PROCEDURES - GENERAL {#cleaning-and-start-up-procedures---general .SECTION1.01}

A.  Check equipment for proper installation and operation prior to
    commencing cleaning. Check chemical injection ports to ensure safe
    and effective introduction of cleaning chemicals and water treatment
    chemicals.

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L.  Air handler and terminal unit coils, chillers and boilers shall be
    isolated prior to cleaning and flushing of main distribution piping.

M.  Water shall be drained to the sanitary sewer only -- draining to the
    ground or storm sewer is not acceptable.

N.  The cleaning and start-up procedures shall commence immediately
    after the system(s) hydrotesting, and shall be reflected in the
    Commissioning Plan and commissioning schedule. The maximum amount of
    time that a loop can be untreated is 48 hours.

O.  Cleaning and flushing shall occur prior to the start-up of boilers
    and chillers.

P.  Piping systems shall not remain full of water without proper
    chemical control for any length of time greater than 48 hours. If
    cleaning and flushing of the system(s) cannot be accomplished
    immediately after the hydrotest, the water used for hydrotesting
    shall be charged with the pretreatment/passivator chemical at a rate
    determined by the SNL Water Treatment Systems Engineer.

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2.  []{#__RefHeading___Toc100976550 .anchor}cleaning, pretreatment and
    start-up PROCEDURES - CONDENSER Water system

## GENERAL INFORMATION  {#general-information .SECTION1.01}

A.  The automatic conductivity controller shall be calibrated by SNL
    personnel and the proper operation of the blow-down valve shall be
    verified prior to the start-up of the condenser system.

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A.  Do not subject new galvanized towers to alkaline cleaners
    (recirculating water pH\>8.5) or acidic situations (recirculating
    water pH\<6.8) to ensure no corrosion will occur. Galvanized towers
    will require a special start-up procedure to ensure proper
    protection of the coating.

## CLEANING AND FLUSHING PROCEDURE {#cleaning-and-flushing-procedure .SECTION1.01}

A.  Verify that coils, heat exchangers, chillers, and boilers are
    isolated.

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B.  Fill the entire system with water and recirculate for one hour.
    Ensure that all valves are open and no dead legs are present. If
    possible, by-pass the condenser to ensure that no large particles
    are introduced into the tubes.

C.  Drain the entire system at the lowest available point(s). Remove all
    debris from the tower basin, all screens and strainers.

D.  Wash out the tower's internal basin and splash fill.

E.  Refill the entire system with water and recirculate for one hour.
    Ensure that all valves are open and no dead legs are present. If
    possible, by-pass the condenser to ensure that no large particles
    are introduced into the condenser tubes.

F.  Test the system to ensure cleanliness and stability. Required water
    quality is as follows:

    1.  Total Dissolved Solids: \<500 uS/cm

    2.  pH: \<7.8

    3.  Soluble Iron: \<0.5 ppm as Fe (optional)

    4.  Color: No visible color or suspended soils

> SNL will provide testing services and/or equipment. SNL Water
> Treatment Systems Engineer must accept and sign off on water quality
> before proceeding. If needed, continue to drain and refill the system
> until water quality parameters are met.

G.  Open all valves once water quality is acceptable in the above steps.

H.  Refill the system, including the condenser, with water and begin
    addition of the appropriate cooling tower chemicals at 2-3 times the
    normal rate. Begin proper conductivity and chemical control of the
    tower system. Chemicals will be SNL furnished.

I.  Recirculate the system for 24-48 hours without any heat load if
    possible to ensure proper scale and corrosion protection.

J.  Inspect all screens and strainers, clean if necessary.

## FINAL TREATMENT PROCEDURE {#final-treatment-procedure .SECTION1.01}

A.  Add inhibitor and biocide immediately, per directions and begin
    circulation.

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K.  Maintain system circulation for at least one week after the
    completion of start-up procedures to promote inhibitor
    effectiveness.

L.  If a system must be drained for any reason, it shall be treated
    immediately upon being refilled. Contact SCO for water treatment
    chemicals immediately should this happen.

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3.  []{#__RefHeading___Toc100976554 .anchor}CLEANING AND START-UP
    PROCEDURES -- CLOSED LOOP WATER SYSTEMS (CHILLED, HEATING SYSTEMS)

## CLEANING AND FLUSHING PROCEDURE {#cleaning-and-flushing-procedure-1 .SECTION1.01}

A.  Drain system after hydro-testing.

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A.  Refill system, close off any 1" or smaller lines (such as coils),
    and isolate heat exchangers, chillers and boilers. Fill the rest of
    the system with water. Circulate for one hour. Ensure that all
    valves (except those supplying smaller legs) are open and that no
    dead legs are present.

B.  Add the cleaning solution (liquid alkaline cleaner) per SNL Water
    Treatment Systems Engineer's directions.

C.  Recirculate for at least 8 hours, preferably overnight and as close
    to full flow as possible; run number of pumps expected during peak
    load operation. If possible, heat system to 120°F during
    circulation. The filter feeder must be installed, with a filter
    installed, and operating during this step.

D.  Bleed and feed the entire system immediately after the circulation
    pumps have been stopped. Add water at the normal feed water
    location; bleed from the farthest point in the system. For example,
    makeup water in the basement and bleed in the penthouse. Continue
    the bleed and feed process until the flowing parameters are met:

    1.  Total Dissolved Solids: \<500 uS/cm

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    1.  pH: \<7.8

    2.  Soluble Iron: \<0.5 ppm as Fe (optional)

    3.  Color: No visible color or suspended soils

> SNL will provide testing services and/or equipment. SNL Water
> Treatment Systems Engineer must sign off on water quality before
> proceeding.

E.  Remove, inspect and clean all strainers located in the distribution
    piping.

F.  Fill the entire system with water and bleed out any entrained air.
    Re-circulate for one hour.

G.  Test the system to ensure cleanliness and stability. Required water
    quality is as follows:

    1.  Total Dissolved Solids: \<500 uS/cm

    2.  pH: \<8.0

    3.  Soluble Iron: \<0.5 ppm as Fe (optional)

    4.  Color: No visible color or suspended soils

> SNL will provide testing services and/or equipment. SNL Water
> Treatment Systems Engineer must accept and sign off on water quality
> before proceeding.

H.  Open all valves once water quality is acceptable in the above steps.

I.  Fill entire system, including heat exchangers, chiller(s), boiler(s)
    and coils.

J.  Repeat steps D-H for the entire closed loop system(s) if water
    quality parameters are not met.

## FINAL TREATMENT PROCEDURE {#final-treatment-procedure-1 .SECTION1.01}

A.  Add sufficient inhibitor treatment immediately following flushing
    and cleaning of the closed loop system(s) per SNL Water Treatment
    Engineer's directions.

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K.  System circulation should be maintained for at least two weeks after
    completion of start-up procedures to promote inhibitor
    effectiveness.

L.  If a system must be drained for any reason, it shall be treated
    immediately upon being refilled. Contact the SCO for water treatment
    chemicals immediately if this should happen.

## DOCUMENTATION {#documentation .SECTION1.01}

M.  Document flushing procedure on the attached checklist and return to
    the SDR.

    END OF SECTION

  ---------------- ---------------------------------- ------ ------------- ----------
  System Cleaning                                                          
  & Flushing                                                               
  Checklist                                                                

  Bldg                                                                     

  System (ChW, HW)                                                         

                                                                           

  Initial Flush of                                    Date   Responsible   Initials
  System                                                     Party         

                   Isolate condenser, boiler, or              Contractor    
                   chiller if possible                                     

                   Isolate all small loops (coils)            Contractor    

                   Open all valves and/or circuit             Contractor    
                   setters                                                 

                   Circulate system for 1 hour                Contractor    
                   minimum                                                 

                   Drain water to sanitary sewer              Contractor    

                   Clean all strainers, filters, and          Contractor    
                   sumps                                                   

                   Refill system with clean water             Contractor    

                                                                            

  Cleaning of                                                               
  System                                                                   

                   Keep equipment isolated as in              Contractor    
                   initial flush                                           

                   Add CL483 to system                        SNL           

                   Install polypropylene filter in            Contractor    
                   pot feeder                                              

                   Circulate system for 24 hours              Contractor    
                   minimum, 48 hours maximum                               

                   Drain water to sanitary sewer              Contractor    

                   Clean all strainers, filters, and          Contractor    
                   sumps                                                   

                   Refill system with clean water             Contractor    

                   Test water to ensure no cleaner            SNL           
                   (CL483) remains:                                        

                   pH (less than 7.8)                                       

                   Conductivity (less than 400 uS/cm)                       

                   Color (clear)                                            

                   Solids (none visible)                                    

                   Iron (less than 2 ppm) optional                          

                   Repeat drain/refill/test if water          Contractor    
                   quality is unacceptable                                 

  Final Treatment                                                           
  of System                                                                

                   Add or begin chemical feed to              SNL           
                   system immediately after cleaning                       

                   Add CS4015 to ChW or HW system                           

                   Initiate control of condenser                            
                   treatment system via chemical                           
                   treatment panel                                         

  **If system is                                                           
  drained for any                                                          
  reason, contact                                                          
  SNL water                                                                
  treatment                                                                
  engineer for                                                             
  chemical                                                                 
  addition                                                                 
  immediately.**                                                           
  ---------------- ---------------------------------- ------ ------------- ----------

> Attachment 1
>
> Turn in records of duration of flushing and cleaning procedure and of
> treatment chemicals added and any recommendations for improvements to
> procedures.