20190320_Attachment_1_CHEMICAL_TREATMENT_OF_WATER_FOR_MECHANICAL_SYSTEMS_UFGS_23_25_00.pdf

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Attached to: Boiler Chemicals (previously issued as W91QF419Q0017)
Solicitation number: W91QF419Q0019
Issued by: Department of the Army Materiel Command Mission and Installation Contracting Command Fort Leavenworth

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USACE / NAVFAC / AFCEC / NASA UFGS- 23 25 00 ( November 2008) Pr epar i ng Act i v i t y: USACE Super sedi ng UFGS- 23 25 00 ( Apr i l 2006)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2019

SECTI ON TABLE OF CONTENTS

DI VI SI ON 23 - HEATI NG, VENTI LATI NG, AND AI R CONDI TI ONI NG ( HVAC)

SECTI ON 23 25 00

CHEMI CAL TREATMENT OF WATER FOR MECHANI CAL SYSTEMS

11/08

PART 1 GENERAL

1. 1 REFERENCES

1. 2 SUMMARY

1. 3 SUBMI TTALS

1. 4 QUALI TY CONTROL

1. 4. 1 Saf et y

1. 4. 2 Dr awi ngs

1. 5 DELI VERY, STORAGE, AND HANDLI NG

1. 6 MAI NTENANCE

PART 2 PRODUCTS

2. 1 STANDARD PRODUCTS

2. 2 NAMEPLATES

2. 3 ELECTRI CAL WORK

2. 4 GAUGES

2. 5 WATER ANALYSI S

2. 6 CONDENSER WATER TREATMENT SYSTEMS

2. 6. 1 Condenser Wat er Li mi t s

2. 6. 2 Gl ycol Sol ut i on

2. 6. 3 Chemi cal Tr eat ment f or Smal l Syst ems

2. 6. 4 Chemi cal Tr eat ment f or Lar ge Syst ems

2. 6. 4. 1 Gener al Requi r ement s

2. 6. 4. 2 Chemi cal Feed Pumps and Tanks

2. 6. 4. 3 Chemi cal I nj ect i on Assembl y

2. 6. 4. 4 Wat er Met er

2. 6. 4. 5 Ti mer s

2. 6. 4. 6 Bl eed ( Bl owdown) Li ne

2. 6. 4. 7 Cont r ol Panel

2. 6. 4. 8 Chemi cal Pi pi ng

2. 6. 4. 9 Sequence of Oper at i on

2. 6. 4. 10 Test Ki t s

2. 7 CHI LLED WATER SYSTEM

2. 7. 1 Requi r ement s f or Gl ycol Sol ut i on

2. 7. 2 Chi l l ed Wat er Tr eat ment

SECTI ON 23 25 00 Page 1

2. 7. 3 Dual Temper at ur e Syst ems

2. 7. 4 Chi l l ed Wat er Test Ki t s

2. 8 LOW AND MEDI UM TEMPERATURE HOT WATER BOI LERS AND HEAT EXCHANGERS

2. 8. 1 Chemi cal Feeder

2. 8. 2 Wat er Sof t eni ng Syst em

2. 8. 3 Low and Medi um Temper at ur e Hot Wat er Tr eat ment

2. 8. 4 Dual Temper at ur e Syst ems

2. 8. 5 Test Ki t Requi r ement s

2. 9 HI GH TEMPERATURE HOT WATER BOI LERS

2. 9. 1 Chemi cal Feeder Uni t

2. 9. 2 Pumps and Tanks

2. 9. 3 Wat er Sof t eni ng Syst em

2. 9. 4 Tr eat ed Wat er Li mi t s

2. 10 Test Ki t

2. 11 STEAM BOI LER WATER TREATMENT

2. 11. 1 Boi l er Wat er Li mi t s

2. 11. 2 Wat er Sof t eni ng Syst em

2. 11. 3 Boi l er Wat er Tr eat ment Syst em

2. 11. 4 St eam Boi l er Chemi cal Feed Pumps and Tanks

2. 11. 5 St eam Boi l er Chemi cal I nj ect i on Assembl i es

2. 11. 6 St eam Boi l er Wat er Met er

2. 11. 7 St eam Boi l er Ti mer s

2. 11. 8 St eam Boi l er Cont r ol Panel

2. 11. 9 Boi l er Bl owdown

2. 11. 10 Boi l er Chemi cal Pi pi ng

2. 11. 11 Boi l er Test Ki t s

2. 12 SUPPLEMENTAL COMPONENTS/ SERVI CES

PART 3 EXECUTI ON

3. 1 EXAMI NATI ON

3. 2 I NSTALLATI ON

3. 3 PI PI NG

3. 4 TRAI NI NG COURSE

3. 5 TESTS

3. 5. 1 Condenser Wat er Qual i t y Test s

3. 5. 1. 1 Smal l Syst ems ( weekl y)

3. 5. 1. 2 Test s f or Lar ge Syst ems ( dai l y)

3. 5. 2 Chi l l ed Wat er Test i ng ( mont hl y)

3. 5. 3 Hot Wat er Boi l er Wat er Qual i t y Test i ng

3. 5. 3. 1 Low and Medi um Temper at ur e Syst ems ( mont hl y)

3. 5. 3. 2 Hi gh Temper at ur e Hot Wat er Syst ems ( dai l y)

3. 5. 4 St eam Boi l er Wat er Test i ng

3. 5. 4. 1 Smal l St eam Syst ems

3. 5. 4. 2 Medi um St eam Syst ems ( t wi ce weekl y)

3. 5. 4. 3 Lar ge St eam Syst ems ( dai l y)

3. 5. 5 Qual i t y Assur ance Test i ng

3. 5. 5. 1 Condenser Wat er QA Test s

3. 5. 5. 2 Chi l l ed Wat er Qual i t y Assur ance Test i ng ( quar t er l y)

3. 5. 5. 3 Hot Wat er Boi l er Wat er Qual i t y Assur ance Test i ng

3. 5. 5. 4 St eam Boi l er Wat er QA Test s

3. 5. 6 Cor r osi on Test er s

3. 6 I NSPECTI ONS

3. 6. 1 I nspect i on Gener al Requi r ement s

3. 6. 2 Boi l er / Pi pi ng Test

- - End of Sect i on Tabl e of Cont ent s - -

SECTI ON 23 25 00 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS- 23 25 00 ( November 2008) Pr epar i ng Act i v i t y: USACE Super sedi ng UFGS- 23 25 00 ( Apr i l 2006)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2019

SECTI ON 23 25 00

CHEMI CAL TREATMENT OF WATER FOR MECHANI CAL SYSTEMS

11/08

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or chemi cal t r eat ment of wat er f or mechani cal syst ems.

Adher e t o UFC 1- 300- 02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Cr i t er i a Change Request ( CCR) .

PART 1 GENERAL

1. 1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out s i de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

SECTI ON 23 25 00 Page 3

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

ASME I NTERNATI ONAL ( ASME)

ASME B40. 100 ( 2013) Pr essur e Gauges and Gauge Attachments

ASTM I NTERNATI ONAL ( ASTM)

ASTM D1384 ( 2005; R 2012) Cor r osi on Test f or Engi ne Cool ant s i n Gl asswar e

ASTM D2688 ( 2015; E 2016) St andar d Test Met hod f or Cor r osi v i t y of Wat er i n t he Absence of Heat Tr ansf er ( Wei ght Loss Met hods)

ASTM D596 ( 2001; R 2011) Repor t i ng Resul t s of Anal ysi s of Wat er

NATI ONAL ELECTRI CAL MANUFACTURERS ASSOCI ATI ON ( NEMA)

NEMA 250 ( 2018) Encl osur es f or El ect r i cal Equi pment ( 1000 Vol t s Maxi mum)

NEMA MG 1 ( 2016; SUPP 2016) Mot or s and Gener at or s

U. S. ARMY CORPS OF ENGI NEERS ( USACE)

PWTB 420- 49- 5 ( 1998) I ndust r i al Wat er Tr eat ment Procedures

U. S. DEPARTMENT OF DEFENSE ( DOD)

UFC 3- 230- 03 ( 2012) Wat er Tr eat ment

1. 2 SUMMARY

Thi s sect i on cover s t he pr ovi s i ons and i nst al l at i on pr ocedur es necessar y f or a compl et e and t ot al l y f unct i onal wat er syst em( s) chemi cal t r eat ment .

Pr ovi de and i nst al l t he syst em wi t h al l necessar y Syst em Component s, Accessor i es, Pi pi ng Component s, and Suppl ement al Component s/ Ser vi ces.

1. 3 SUBMITTALS

NOTE: Revi ew submi t t al descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect .

SECTI ON 23 25 00 Page 4

The Gui de Speci f i cat i on t echni cal edi t or s have desi gnat ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y , wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a “ G” t o an i t em, i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For submi t t al s r equi r i ng Gover nment appr oval on Ar my pr oj ect s, a code of up t o t hr ee char act er s wi t hi n t he submi t t al t ags may be used f ol l owi ng t he " G" desi gnat i on t o i ndi cat e t he appr ovi ng aut hor i t y.

Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i c t Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i c t Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

The " S" f ol l owi ng a submi t t al i t em i ndi cat es t hat t he submi t t al i s r equi r ed f or t he Sust ai nabi l i t y eNot ebook t o f ul f i l l f eder al l y mandat ed sust ai nabl e r equi r ement s i n accor dance wi t h Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG. Locat e t he " S" submi t t al under t he SD number t hat best descr i bes t he submi t t al i t em.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or [ Cont r act or Qual i t y Cont r ol appr oval . ] [ i nf or mat i on onl y. When used, a desi gnat i on f ol l owi ng t he " G" desi gnat i on i dent i f i es t he of f i ce t hat wi l l r evi ew t he submi t t al f or t he Gover nment . ] Submi t t al s wi t h an " S" ar e f or i ncl usi on i n t he Sust ai nabi l i t y eNot ebook, i n conf or mance t o Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG. Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00

SUBMI TTAL PROCEDURES:

SD- 03 Pr oduct Dat a

Wat er Tr eat ment Syst em; G[ , [ _____] ] Wat er Anal ysi s; G[ , [ _____] ] Spar e Par t s Fi el d I nst r uct i ons Test s; G[ , [ _____] ] Tr ai ni ng Cour se; G[ , [ _____] ]

SD- 06 Test Repor t s

Condenser Wat er QA Test s St eam Boi l er Wat er QA Test s

SD- 10 Oper at i on and Mai nt enance Dat a

SECTI ON 23 25 00 Page 5

Wat er Tr eat ment Syst em

1. 4 QUALI TY CONTROL

1. 4. 1 Safety

NOTE: Cat wal k, l adder and guar dr ai l may be r equi r ed. I f so, sel ect t he appl i cabl e i t em and del et e t he ot her s and i ndi cat e on dr awi ngs t he sel ect ed i t em. I f not appl i cabl e, del et e t he ent i r e sent ence wi t hi n t he br acket s.

Exposed movi ng par t s, par t s t hat pr oduce hi gh oper at i ng t emper at ur e, par t s whi ch may be el ect r i cal l y ener gi zed, and par t s t hat may be a hazar d t o oper at i ng per sonnel shal l be i nsul at ed, f ul l y encl osed, guar ded, or f i t t ed wi t h ot her t ypes of saf et y devi ces. I nst al l saf et y devi ces so t hat pr oper oper at i on of equi pment i s not i mpai r ed. Pr ovi de [ cat wal k, ] [ l adder , ] [ and guar dr ai l ] wher e i ndi cat ed and i n accor dance wi t h Sect i on [ 05 50 13

MI SCELLANEOUS METAL FABRI CATI ONS] [ 05 51 33 METAL LADDERS] .

1. 4. 2 Drawings

Because of t he smal l scal e of t he dr awi ngs, i t i s not possi bl e t o i ndi cat e al l of f set s, f i t t i ngs, and accessor i es t hat may be r equi r ed. Car ef ul l y i nvest i gat e t he pl umbi ng, f i r e pr ot ect i on, el ect r i cal , st r uct ur al and f i ni sh condi t i ons t hat woul d af f ect t he wor k t o be per f or med and ar r ange such wor k accor di ngl y, f ur ni shi ng r equi r ed of f set s, f i t t i ngs, and accessor i es t o meet such condi t i ons.

1. 5 DELI VERY, STORAGE, AND HANDLI NG

Pr ot ect al l equi pment del i ver ed and pl aced i n st or age f r om t he weat her , humi di t y and t emper at ur e var i at i ons, di r t and dust , or ot her cont ami nant s.

1. 6 MAINTENANCE

Submi t spar e par t s dat a f or each di f f er ent i t em of mat er i al and equi pment speci f i ed, af t er appr oval of t he det ai l dr awi ngs, not l at er t han [ _____] mont hs pr i or t o t he dat e of benef i c i al occupancy. The dat a shal l i ncl ude a compl et e l i s t of par t s and suppl i es, wi t h sour ce of suppl y

PART 2 PRODUCTS

2. 1 STANDARD PRODUCTS

a. Pr ovi de mat er i al s and equi pment whi ch ar e st andar d pr oduct s of a manuf act ur er r egul ar l y engaged i n t he manuf act ur i ng of such pr oduct s, t hat ar e of a s i mi l ar mat er i al , desi gn and wor kmanshi p and t hat have been i n sat i sf act or y commer ci al or i ndust r i al use f or t wo year s pr i or t o bi d openi ng.

b. The t wo- year use shal l i ncl ude appl i cat i ons of equi pment and mat er i al s under s i mi l ar c i r cumst ances and of s i mi l ar s i ze. The t wo year s exper i ence shal l have been sat i sf act or i l y compl et ed by a pr oduct whi ch has been sol d or i s of f er ed f or sal e on t he commer ci al mar ket t hr ough adver t i sement s, manuf act ur er ' s cat al ogs, or br ochur es. Pr oduct s havi ng

SECTI ON 23 25 00 Page 6 l ess t han a t wo- year f i el d ser vi ce r ecor d wi l l be accept abl e i f a cer t i f i ed r ecor d of sat i sf act or y f i el d oper at i on, f or not l ess t han 6000 hour s excl usi ve of t he manuf act ur er ' s f act or y t est s, can be shown.

c. Al l pr oduct s shal l be suppor t ed by a ser vi ce or gani zat i on. Submi t a cer t i f i ed l i s t of qual i f i ed per manent ser vi ce or gani zat i ons f or suppor t of t he equi pment , i ncl udi ng t hei r addr esses and qual i f i cat i ons. These ser vi ce or gani zat i ons shal l be r easonabl y conveni ent t o t he equi pment i nst al l at i on and shal l be abl e t o r ender sat i sf act or y ser vi ce t o t he equi pment on a r egul ar and emer gency basi s dur i ng t he war r ant y per i od of t he cont r act .

d. The sel ect ed ser vi ce or gani zat i on shal l pr ovi de t he chemi cal s r equi r ed, t he concent r at i ons r equi r ed, and t he wat er t r eat ment equi pment s i zes and f l ow r at es r equi r ed. The company shal l pr ovi de al l chemi cal s r equi r ed f or t he [ condenser ] [ condenser and chi l l ed] wat er syst ems and f i l l t he syst ems wi t h chemi cal s t o t he l evel s speci f i ed. The chemi cal shal l meet t he r equi r ement s of t hi s speci f i cat i on as wel l as t he r ecommendat i ons f r om t he manuf act ur er s of t he condenser and cool i ng t ower . Aci d t r eat ment chemi cal s shal l not be used.

2. 2 NAMEPLATES

Each maj or component of equi pment shal l have t he manuf act ur er ' s name, addr ess, t ype or st y l e, and cat al og or ser i al number on a pl at e secur el y at t ached t o t he i t em of equi pment . Namepl at es shal l be pr ovi ded f or :

a. Pump( s)

b. Pump Mot or ( s)

2. 3 ELECTRI CAL WORK

NOTE: Wher e mot or st ar t er s f or mechani cal equi pment ar e pr ovi ded i n mot or - cont r ol cent er s, t he r ef er ences t o mot or st ar t er s wi l l be del et ed.

Mechani cal desi gner must ensur e t hat t he el ect r i cal desi gner i s pr ovi ded wi t h el ect r i cal r equi r ement s f or chemi cal f eed pumps.

El ect r i cal equi pment , mot or s, mot or ef f i c i enci es, and wi r i ng shal l be i n accor dance wi t h Sect i on 26 20 00 I NTERI OR DI STRI BUTI ON SYSTEM. Pr ovi de el ect r i cal mot or dr i ven equi pment speci f i ed compl et e wi t h mot or s, mot or st ar t er s, and cont r ol s. El ect r i cal char act er i st i cs and encl osur e t ype shal l be as shown, and unl ess ot her wi se i ndi cat ed, al l mot or s of 745 W 1 hor sepower and above wi t h open, dr i ppr oof , or t ot al l y encl osed f an cool ed encl osur es, shal l be hi gh ef f i c i ency t ype. Fi el d wi r i ng shal l be i n accor dance wi t h manuf act ur er ' s i nst r uct i ons. Each mot or shal l conf or m t o NEMA MG 1 and be of suf f i c i ent s i ze t o dr i ve t he equi pment at t he speci f i ed capaci t y wi t hout exceedi ng t he namepl at e r at i ng of t he mot or . Al l mot or s shal l be cont i nuous dut y wi t h t he encl osur e speci f i ed. Pr ovi de mot or st ar t er s compl et e wi t h t her mal over l oad pr ot ect i on and ot her appur t enances necessar y f or t he mot or cont r ol i ndi cat ed. Fur ni sh mot or s wi t h a magnet i c acr oss- t he- l i ne or r educed vol t age t ype st ar t er as r equi r ed by t he manuf act ur er . Mot or st ar t er shal l be pr ovi ded wi t h [ NEMA 1] [ NEMA 3R] [ NEMA [ _____] ] encl osur es. Manual or aut omat i c cont r ol and pr ot ect i ve or s i gnal devi ces r equi r ed f or t he oper at i on speci f i ed and any cont r ol wi r i ng

SECTI ON 23 25 00 Page 7 r equi r ed f or cont r ol s and devi ces speci f i ed, but not shown, shal l be provided.

2. 4 GAUGES

Gauges shal l conf or m t o ASME B40. 100, Cl ass 1, 2, or 3, St y l e X, Type I or I I I as r equi r ed, 115 mm 4- 1/ 2 i nches i n di amet er wi t h phenol i c or met al case.

2. 5 WATER ANALYSI S

NOTE: A wat er anal ysi s may be avai l abl e f r om t he user . I f an anal ysi s i s not avai l abl e, an anal ysi s wi l l be per f or med dur i ng t he desi gn, and appr opr i at e dat a wi l l be ent er ed.

Cool i ng t ower s wi t h a capaci t y gr eat er t han 176 kW 50 t ons wi l l be pr ovi ded wi t h aut omat i c chemi cal f eed and bl ow down syst ems. Smal l er t ower s wi l l be pr ovi ded wi t h cont i nuousl y act i vat ed syst ems.

I ndi cat e t he l ocat i on of t he ent i r e wat er t r eat ment syst em. Del et e al l t he i nf or mat i on under t hi s par agr aph i f a cool i ng t ower i s not used i n t he system.

Condi t i ons of make- up wat er t o be suppl i ed t o t he boi l er s, cool i ng t ower s and chi l l ed wat er syst ems r epor t ed i n accor dance wi t h ASTM D596 ar e as follows:

Dat e of Sampl e [_____]

Temperature [ _____] degr ees C

Si l i ca ( Si O 2) [ _____] ppm ( mg/ L)

Insoluble [ _____] ppm ( mg/ L)

I r on, t ot al ( Fe) [ _____] ppm ( mg/ L)

Al umi num ( Al ) [ _____] ppm ( mg/ L)

Cal ci um ( Ca) [ _____] ppm ( mg/ L)

Magnesi um ( Mg) [ _____] ppm ( mg/ L)

Car bonat e ( HCO 3) [ _____] ppm ( mg/ L)

Sul f at e ( SO 4) [ _____] ppm ( mg/ L)

Chl or i de ( Cl ) [ _____] ppm ( mg/ L)

Ni t r at e ( NO 3) [ _____] ppm ( mg/ L)

SECTI ON 23 25 00 Page 8

Turbidity [ _____] nt u pH [_____]

Resi dual Chl or i ne [ _____] ppm ( mg/ L)

Tot al Al kal i ni t y [ _____] ppm ( mg/ L)

Non- Car bonat e Har dness [ _____] ppm ( mg/ L)

Tot al Har dness [ _____] ppm ( mg/ L)

Di ssol ved Sol i ds [ _____] ppm ( mg/ L)

Conductivity [ _____] mi cr omho/ cm

2. 6 CONDENSER WATER TREATMENT SYSTEMS

The use of chemi cal - t r eat ment pr oduct s cont ai ni ng hexaval ent chr omi um ( Cr ) i s pr ohi bi t ed. Tr eat t he wat er t o be used i n t he condenser wat er syst ems t o mai nt ai n t he condi t i ons r ecommended by t hi s speci f i cat i on as wel l as t he r ecommendat i ons f r om t he manuf act ur er s of t he condenser and evapor at or coi l s . Chemi cal s shal l meet al l r equi r ed f eder al , st at e, and l ocal envi r onment al r egul at i ons f or t he t r eat ment of condenser - s i de heat exchanger s, cool i ng t ower s and di r ect di schar ge t o t he sani t ar y sewer .

2. 6. 1 Condenser Wat er Li mi t s

The condenser wat er l i mi t s shal l be as f ol l ows, unl ess di ct at ed di f f er ent l y by t he cool i ng t ower or chi l l er manuf act ur er ' s r ecommendat i ons:

Tr eat ment t ype Phosphonate/Polymer

Puckor i us I ndex 4 mi ni mum

Langel i er I ndex 4 maxi mum

Tot al Di ssol ved Sol i ds 5000 ppm maxi mum

Cal ci um Har dness 1200 ppm maxi mum

Silica 150 ppm maxi mum pH 7. 5 - 8. 5

For t r eat ed condenser / cool i ng t ower wat er , bl owdown must be mi ni mi zed unt i l t he f i r st of one of t he t op 5 l i mi t s i s r eached. Speci f i c r equi r ement s f or t r eat ment chemi cal s and l evel s ar e l i s t ed bel ow i n par agr aphs deal i ng wi t h smal l and l ar ge syst ems.

2. 6. 2 Gl ycol Sol ut i on

SECTI ON 23 25 00 Page 9

NOTE: I f f r eeze pr ot ect i on f or condenser wat er i s not r equi r ed, t hi s par agr aph shoul d be del et ed.

When a gl ycol syst em i s used, t he s i ze of t he HVAC syst ems shoul d be cor r ect ed due t o changes i n speci f i c heat and vi scosi t y. ASHRAE' s " HVAC syst ems and Equi pment Handbook" shoul d be consul t ed f or t he appr opr i at e cal cul at i on pr ocedur es. Et hyl ene gl ycol shoul d be used f or HVAC syst ems. However , i f t he heat t r ansf er medi a has t he possi bi l i t y of mi x i ng wi t h a pot abl e wat er syst em, pr opyl ene gl ycol shoul d be used. The r equi r ed concent r at i on shoul d be ent er ed based upon t he ant i c i pat ed ambi ent or oper at i ng t emper at ur e.

Pr ovi de f or t he syst em a [ _____] per cent concent r at i on by vol ume of i ndust r i al gr ade [ et hyl ene] [ pr opyl ene] gl ycol , and cor r osi on i nhi bi t or s.

Test t he gl ycol i n accor dance wi t h ASTM D1384 wi t h l ess t han 0. 013 mm 0. 5 mi l s penet r at i on per year f or al l syst em met al s. The gl ycol shal l cont ai n cor r osi on i nhi bi t or s. Si l i cat e based i nhi bi t or s ar e not accept abl e. The sol ut i on shal l be compat i bl e wi t h pump seal s, ot her el ement s of t he syst em, and wat er t r eat ment chemi cal s used wi t hi n t he syst em.

2. 6. 3 Chemi cal Tr eat ment f or Smal l Syst ems

For cool i ng syst ems wi t h a capaci t y of 175. 8 kW 50 t ons or l ess, pr ovi de t he f ol l owi ng chemi cal t r eat ment . For cor r osi on cont r ol pr ovi de 6. 8 t o 9. 1 kg 15 t o 20 pounds pol yphosphat e i n nyl on mesh bag i n cool i ng t ower sump.

I f bi oci de i s needed, use ei t her 1- br omo- 3- chl or o- 5. 5- di met hyl hydant oi n or gl ut er al dehyde as r ecommended by manuf act ur er .

2. 6. 4 Chemi cal Tr eat ment f or Lar ge Syst ems

For cool i ng syst ems wi t h capaci t i es gr eat er t han 175. 8 kW 50 t ons pr ovi de one of t he t hr ee f ol l owi ng chemi cal t r eat ment s wi t h t he l i mi t s i ndi cat ed.

The zi nc and mol ybdat e i n t he l ast t wo t r eat ment s hel p t o meet t he maxi mum cor r osi on r equi r ement s i n wat er s t hat t end t o be mor e cor r osi ve. Bi oci des must be mai nt ai ned t o cont r ol bact er i a bel ow 10, 000 col ony f or mi ng uni t s per mi l l i l i t er .

a. Phosphonat e Type Tr eat ment

Phosphate 3- 5 ppm

Polymer 3- 4 ppm

TT 1- 2 ppm

Biocides as r equi r ed

b. Zi nc- Phosphonat e Type Tr eat ment

Phosphate 3- 5 ppm

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Polymer 3- 4 ppm

Zinc 1- 2 ppm

TT 1- 2 ppm

Biocides as r equi r ed

c. Zi nc- Mol ybdat e Type Tr eat ment

Phosphate 3- 5 ppm

Polymer 3- 4 ppm

Molybdate 10- 15 ppm

Zinc 2- 3 ppm

TT 1- 2 ppm

Biocides as r equi r ed

2. 6. 4. 1 Gener al Requi r ement s

Pr ovi de a wat er t r eat ment syst em capabl e of aut omat i cal l y f eedi ng chemi cal s and bl eedi ng t he syst em t o pr event cor r osi on, scal e, and bi ol ogi cal f or mat i ons. Submi t [ 6] [ _____] compl et e copi es, at l east 5 weeks pr i or t o t he pur chase of t he wat er t r eat ment syst em, of t he pr oposed wat er t r eat ment pl an i ncl udi ng a l ayout ; cont r ol scheme; a l i s t of exi st i ng make- up wat er chemi st r y, i ncl udi ng t he i t ems l i s t ed i n par agr aph Wat er Anal ysi s; a l i s t of t r eat ment chemi cal s t o be added; t he pr opor t i on of chemi cal s t o be added; t he f i nal t r eat ed wat er cont r ol l evel s; and a descr i pt i on of heal t h, saf et y and envi r onment al concer ns f or handl i ng t he chemi cal s pl us any speci al vent i l at i on r equi r ement s. Aut omat i c chemi cal f eed syst ems shal l aut omat i cal l y f eed chemi cal s i nt o t he condenser wat er based on makeup wat er r at e. El ect r i cal s i gnal s f r om a wat er met er on t he makeup wat er l i ne shal l be used t o cont r ol t he out put of chemi cal f eed pumps. The syst em shal l be i ni t i al l y set manual l y based on t he wat er anal ysi s of t he make- up wat er .

Submi t [ 6] [ _____] compl et e copi es of oper at i ng and mai nt enance manual s f or t he st ep- by- st ep wat er t r eat ment pr ocedur es. The manual s shal l i nc l ude t est i ng pr ocedur es used i n det er mi ni ng wat er qual i t y .

2. 6. 4. 2 Chemi cal Feed Pumps and Tanks

NOTE: The r equi r ed maxi mum pump f l ow r at e wi l l be shown on t he dr awi ngs. The f l ow r at e wi l l depend upon t he makeup wat er f l ow r at e, t he chemi cal composi t i on of t he makeup wat er and t he concent r at i on of t he chemi cal suppl i ed. A wat er t r eat ment company shoul d be consul t ed f or det er mi ni ng t he pr oper maxi mum pump f l ow r at e.

A wat er t r eat ment company wi l l be consul t ed t o

SECTI ON 23 25 00 Page 11 det er mi ne t he number of t anks r equi r ed and shal l be shown on pl ans. The number wi l l depend on t he s i ze of t he boi l er , makeup wat er f l ow r at e, and makeup wat er composi t i on. A pot abl e wat er l i ne wi l l be pr ovi ded near t he t anks f or t he mi xi ng of chemi cal s.

a. Fur ni sh chemi cal f eed pumps and t anks as a package wi t h t he pumps mount ed on and pi pi ng connect ed t o t he t ank. The chemi cal f eed pumps shal l be posi t i ve di spl acement di aphr agm t ype. The pump' s cyl i nder s, pl unger s, bal l check val ves, and check val ve bodi es shal l be of cor r osi on r esi st ant mat er i al s sui t abl e f or t he chemi cal s bei ng pumped.

Cyl i nder s shal l be r epl aceabl e f or i ncr eased or r educed pr essur e or capaci t y r anges.

b. The f l ow r at e of t he pumps shal l be adj ust abl e f r om 0 t o 100 per cent whi l e i n oper at i on. Vol umet r i c accur acy of t he pumps shal l be wi t hi n one per cent over t he r ange i ndi cat ed. Pump capaci t i es shal l be adj ust abl e by posi t i oni ng cr ank pi n wi t h mi cr omet er set scr ews. St r oke l engt h scal e shal l be di v i ded i n per cent age gr aduat i ons engr aved on scal e. The di schar ge pr essur e of pumps shal l not be l ess t han 1. 5 t i mes t he l i ne pr essur e at t he poi nt of connect i on. The pumps shal l be pr ovi ded wi t h a pr essur e r el i ef val ve and a check val ve mount ed i n t he pump di schar ge. The pumps shal l be cont r ol l ed by an ext er nal cont r ol l er / t i mer r ecei v i ng s i gnal s f r om t he makeup wat er met er .

c. Dr i ve mot or s shal l be 110 vol t , s i ngl e phase and shal l have dr i p- pr oof encl osur es. Pr ovi de t wo chemi cal t anks. The t anks shal l be const r uct ed of [ mat er i al s compat i bl e wi t h t he chemi cal s t o be st or ed i n t he t ank] [ hi gh densi t y pol yet hyl ene] [ st ai nl ess st eel ] [ f i ber r ei nf or ced pl ast i c] wi t h a hi nged cover and mount ed on l egs. Tanks shal l have f i l l i ng and dr ai n connect i ons and gauge gl ass. Each t ank shal l be f ur ni shed wi t h one pump, mount ed and pi ped wi t h bl ack i r on pi pe and f i t t i ngs, wi t h suct i on st r ai ner and st ai nl ess st eel scr een, and wi t h 13 mm 1/ 2 i nch r el i ef val ve wi t h st eel body and st ai nl ess st eel t r i m. Tank bot t om shal l be di shed concave t o a r adi us equal t o t he di amet er of t he t ank. Mot or - dr i ven agi t at or shal l be pr ovi ded.

The t anks shal l have suf f i c i ent capaci t y t o r equi r e r echar gi ng onl y once per [ 7] [ 14] [ 21] [ _____] days dur i ng nor mal oper at i on.

2. 6. 4. 3 Chemi cal I nj ect i on Assembl y

Pr ovi de an i nj ect i on assembl y at each chemi cal f eed poi nt . Locat e t he i nj ect i on assembl y downst r eam of r eci r cul at i ng pumps and upst r eam of t he condenser . The i nj ect i on assembl i es shal l be const r uct ed of st ai nl ess st eel . The di schar ge of t he assembl i es shal l ext end t o t he cent er l i ne of t he condenser wat er pi pi ng. Each assembl y shal l i ncl ude a shut of f val ve and check val ve at t he poi nt of ent r ance i nt o t he condenser wat er l i ne.

2. 6. 4. 4 Wat er Met er

Pr ovi de wat er met er s wi t h an el ect r i c cont act i ng r egi st er and r emot e accumul at i ve count er . I nst al l t he met er wi t hi n t he make- up wat er l i ne, as indicated.

2. 6. 4. 5 Timers

Ti mer s shal l be of t he aut omat i c r eset , adj ust abl e t ype, and el ect r i cal l y oper at ed. The t i mer s shal l be desi gned t o wor k wi t h t he cont act i ng head

SECTI ON 23 25 00 Page 12 wat er met er s. The t i mer shoul d i ncl ude t he wat er met er cabl e. The t i mer s wi l l cont r ol oper at i on of t he chemi cal f eed pumps. The t i mer s shal l be sui t abl e f or a 120 vol t cur r ent . The t i mer s shal l be l ocat ed wi t hi n t he wat er t r eat ment cont r ol panel .

2. 6. 4. 6 Bl eed ( Bl owdown) Li ne

Cont r ol t he f l ow t hr ough t he bl eed l i ne by a conduct i v i t y met er and pr obe i nst al l ed t o measur e t he conduct i v i t y of t he condenser wat er . The conduct i v i t y met er shal l have a hi gh and l ow set poi nt above whi ch t he conduct i v i t y met er shal l open a sol enoi d val ve on t he bl eed l i ne. The bl eed l i ne at t achment t o t he condenser wat er pi pi ng shal l be l ocat ed downst r eam of t he r eci r cul at i ng pumps and upst r eam of t he chemi cal i nj ect i on poi nt . The bl eed l i ne shal l be ext ended t o t he near est dr ai n f or cont i nuous di schar ge.

2. 6. 4. 7 Cont r ol Panel

NOTE: The MAN- OFF- AUTO swi t ch shoul d be del et ed f or cont i nuousl y f ed syst ems. I n ar eas wher e a panel coul d come i n cont act wi t h t he wat er t r eat ment chemi cal , choose t he st ai nl ess st eel const r uct i on.

The cont r ol panel shal l be a NEMA 12 encl osur e sui t abl e f or sur f ace mount i ng. The panel shal l be const r uct ed of [ st ai nl ess st eel ] [ coat ed st eel ] wi t h a hi nged door and l ock. The panel shal l cont ai n a l ami nat ed pl ast i c namepl at e i dent i f y i ng each of t he f ol l owi ng f unct i ons:

( 1) Mai n power swi t ch and i ndi cat i ng l i ght ( 2) MAN- OFF- AUTO sel ect or swi t ch ( 3) I ndi cat i ng l amp f or bl eed- of f val ve ( 4) I ndi cat i ng l amp f or each chemi cal f eed pump ( 5) Set poi nt r eadi ng f or each t i mer

2. 6. 4. 8 Chemi cal Pi pi ng

The pi pi ng and f i t t i ngs shal l be const r uct ed of [ schedul e 80 PVC] [ st ai nl ess st eel ] sui t abl e f or t he wat er t r eat ment chemi cal s.

2. 6. 4. 9 Sequence of Oper at i on

The chemi cal s shal l be added based upon sensi ng t he make- up wat er f l ow r at e and act i vat i ng appr opr i at e t i mer s. A separ at e t i mer shal l be pr ovi ded f or each chemi cal . The bl ow down shal l be cont r ol l ed based upon t he conduct i v i t y of t he condenser wat er . The i nj ect i on of t he chemi cal r equi r ed f or bi ol ogi cal cont r ol shal l be cont r ol l ed by a t i mer t hat can be manual l y set f or pr oper chemi cal f eed. Al l t i mer set poi nt s, bl ow down r at es, and chemi cal pump f l ow r at es shal l be det er mi ned and set by t he wat er t r eat ment company.

2. 6. 4. 10 Test Ki t s

One t est k i t of each t ype r equi r ed t o det er mi ne t he wat er qual i t y as out l i ned wi t hi n t he oper at i on and mai nt enance manual s shal l be pr ovi ded.

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2. 7 CHI LLED WATER SYSTEM

NOTE: The ser vi ces of a company r egul ar l y engaged i n wat er t r eat ment f or mechani cal syst ems t o t r eat a chi l l ed wat er syst em shoul d onl y be r equi r ed i f t he makeup wat er avai l abl e i s of ver y poor qual i t y .

For dual t emper at ur e syst ems ( chi l l ed and heat ed wat er ) , coor di nat e t he compat i bi l i t y of t he separ at e wat er t r eat ment syst ems.

A [ 7. 57] [ 18. 92] [ _____] L [ 2] [ 5] [ _____] gal l on shot f eeder shal l be pr ovi ded on t he chi l l ed wat er pi pi ng as i ndi cat ed. The f eeder shal l be f ur ni shed wi t h an ai r vent , gauge gl ass, f unnel , val ves, f i t t i ngs, and piping.

2. 7. 1 Requi r ement s f or Gl ycol Sol ut i on

NOTE: I f f r eeze pr ot ect i on f or chi l l ed wat er i s not r equi r ed, t hi s par agr aph shoul d be del et ed. When a gl ycol syst em i s used, t he s i ze of t he HVAC syst ems shoul d be cor r ect ed due t o changes i n speci f i c heat and vi scosi t y. ASHRAE' s " HVAC syst ems and Equi pment Handbook" shoul d be consul t ed f or t he appr opr i at e cal cul at i on pr ocedur es. Et hyl ene gl ycol shoul d be used f or HVAC syst ems. However , i f t he heat t r ansf er medi a has t he possi bi l i t y of mi x i ng wi t h a pot abl e wat er syst em, pr opyl ene gl ycol shoul d be used. The r equi r ed concent r at i on shoul d be ent er ed based upon t he ant i c i pat ed ambi ent or oper at i ng temperature.

Pr ovi de a [ _____] per cent concent r at i on by vol ume of i ndust r i al gr ade [ et hyl ene] [ pr opyl ene] gl ycol , and cor r osi on i nhi bi t or s, f or t he syst em.

Test t he gl ycol i n accor dance wi t h ASTM D1384 wi t h l ess t han 0. 013 mm 0. 5 mi l s penet r at i on per year f or al l syst em met al s. The gl ycol shal l cont ai n cor r osi on i nhi bi t or s. Si l i cat e based i nhi bi t or s shal l not be used. The sol ut i on shal l be compat i bl e wi t h pump seal s, ot her el ement s of t he syst em, and wat er t r eat ment chemi cal s used wi t hi n t he syst em.

2. 7. 2 Chi l l ed Wat er Tr eat ment

Tr eat chi l l ed wat er wi t h ei t her a bor ax/ ni t r i t e t ype t r eat ment or a mol ybdat e t ype t r eat ment . Bot h t ypes of t r eat ment can be used wi t h gl ycol . Bor ax/ ni t r i t e t r eat ment shal l be mai nt ai ned at t he l i mi t s of 600 t o 1000 ppm ni t r i t e, 40 - 50 ppm copper cor r osi on i nhi bi t or ( TT or MBT) , and pH of 8. 5 t o 9. 5. Mol ybdat e t r eat ment shal l be mai nt ai ned at t he l i mi t s of 100 t o 125 ppm mol ybdat e, 40 - 50 ppm copper cor r osi on i nhi bi t or ( TT or MBT) , and pH of 8. 0 t o 9. 0.

2. 7. 3 Dual Temper at ur e Syst ems

Dual hot / chi l l ed wat er syst ems t r eat ed wi t h bor ax/ ni t r i t e shal l al so be t r eat ed wi t h a bi oci de.

SECTI ON 23 25 00 Page 14

2. 7. 4 Chi l l ed Wat er Test Ki t s

One t est k i t of each t ype r equi r ed t o det er mi ne t he wat er qual i t y as out l i ned wi t hi n t he oper at i on and mai nt enance manual s shal l be pr ovi ded ( e. g. pH and ni t r i t e or mol ybdat e) .

2. 8 LOW AND MEDI UM TEMPERATURE HOT WATER BOI LERS AND HEAT EXCHANGERS

Low and medi um t emper at ur e hot wat er boi l er s ar e def i ned as t hose oper at i ng bel ow 177 degr ees C 350 degr ees F, ( 122 degr ees C 250 degr ees F f or Low Temperature).

2. 8. 1 Chemi cal Feeder

A [ 7. 57] [ 18. 92] [ _____] L [ 2] [ 5] [ _____] gal l on shot f eeder shal l be pr ovi ded on t he hot wat er pi pi ng as i ndi cat ed. Si ze and capaci t y of f eeder shal l be based on l ocal r equi r ement s and wat er anal ysi s. The f eeder shal l be f ur ni shed wi t h an ai r vent , gauge gl ass, f unnel , val ves, f i t t i ngs, and piping.

2. 8. 2 Wat er Sof t eni ng Syst em

NOTE: The makeup wat er anal ysi s and t he boi l er manuf act ur er ' s r ecommended f eed wat er condi t i ons wi l l be used t o det er mi ne t he need f or a wat er sof t ener . UFC 3- 230- 03 cont ai ns gener al gui dance f or t he sel ect i on. Sof t eni ng of makeup wat er f or hot wat er boi l er s i s r equi r ed i f t he makeup wat er har dness i s above 200 ppm or t he makeup r at e i s above 1 per cent .

The wat er sof t eni ng syst em shal l be as speci f i ed i n Sect i on 22 31 00 WATER

SOFTENERS, CATI ON- EXCHANGE ( SODI UM CYCLE) .

2. 8. 3 Low and Medi um Temper at ur e Hot Wat er Tr eat ment

Hot wat er shal l be t r eat ed wi t h ei t her a bor ax/ ni t r i t e t ype t r eat ment or a mol ybdat e t ype t r eat ment . Bot h t ypes of t r eat ment can be used wi t h gl ycol . Bor ax/ ni t r i t e t r eat ment shal l be mai nt ai ned at t he l i mi t s of 600 t o 1000 ppm ni t r i t e, 40 - 50 ppm copper cor r osi on i nhi bi t or ( TT or MBT) and pH of 8. 5 t o 9. 5. Mol ybdat e t r eat ment shal l be mai nt ai ned at t he l i mi t s of 100 t o 125 ppm mol ybdat e, 40 - 50 ppm copper cor r osi on i nhi bi t or ( TT or MBT) and pH of 8. 0 t o 9. 0.

2. 8. 4 Dual Temper at ur e Syst ems

Dual hot / chi l l ed wat er syst ems t r eat ed wi t h bor ax/ ni t r i t e shal l al so be t r eat ed wi t h a bi oci de.

2. 8. 5 Test Ki t Requi r ement s

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2. 9 HI GH TEMPERATURE HOT WATER BOI LERS

Hi gh Temper at ur e Hot Wat er Boi l er s ar e def i ned as t hose oper at i ng above 177 degr ees C 350 deg F. The chemi cal t r eat ment r equi r es mor e at t ent i on ( dai l y) , t he makeup wat er r equi r es sof t eni ng and t he chemi cal s and l i mi t s di f f er f r om t he l ow and medi um t emper at ur e hot wat er boi l er s.

2. 9. 1 Chemi cal Feeder Uni t

A company r egul ar l y engaged i n wat er t r eat ment f or mechani cal syst ems wi l l be consul t ed t o det er mi ne t he number of t anks r equi r ed t o be shown on t he dr awi ngs. The number wi l l depend on t he s i ze of t he boi l er , makeup wat er f l ow r at e, and makeup wat er composi t i on. A pot abl e wat er l i ne wi l l be pr ovi ded near t he t anks f or t he mi xi ng of chemi cal s.

A f eeder uni t shal l be pr ovi ded f or each boi l er . Chemi cal f eeder shal l be aut omat i c pr opor t i oni ng, shot t ype, or pump t ype. Al l appur t enances necessar y f or sat i sf act or y oper at i on shal l be pr ovi ded. Si ze and capaci t y of f eeder shal l be based upon l ocal r equi r ement s and wat er anal ysi s.

2. 9. 2 Pumps and Tanks

a. Fur ni sh chemi cal f eed pumps and t anks as a package wi t h t he pumps mount ed on and pi pi ng connect ed t o t he t ank. The chemi cal f eed pumps shal l be posi t i ve di spl acement di aphr agm t ype. The pump cyl i nder s, pl unger s, bal l check val ves, and check val ve bodi es shal l be of cor r osi on r esi st ant mat er i al s sui t abl e f or t he chemi cal s bei ng pumped.

Cyl i nder s shal l be r epl aceabl e f or i ncr eased or r educed pr essur e or capaci t y r anges.

b. The f l ow r at e of t he pumps shal l be adj ust abl e f r om 0 t o 100 per cent whi l e i n oper at i on. Vol umet r i c accur acy of t he pumps shal l be wi t hi n one per cent over t he r ange i ndi cat ed. Pump capaci t i es shal l be adj ust abl e by posi t i oni ng cr ank pi n wi t h mi cr omet er set scr ews. St r oke l engt h scal e shal l be di v i ded i n per cent age gr aduat i ons engr aved on scal e. The di schar ge pr essur e of pumps shal l not be l ess t han 1. 5 t i mes t he l i ne pr essur e at t he poi nt of connect i on. The pump shal l be desi gned t o f eed t he chemi cal sol ut i ons i nt o t he HTW r et ur n l i ne t o t he syst em ci r cul at i ng pumps and shal l have capaci t y t o f eed a maxi mum of [ 5. 3] [ _____] mL/ second [ 5] [ _____] gph. The pumps shal l be pr ovi ded wi t h a pr essur e r el i ef val ve and a check val ve mount ed i n t he pump di schar ge. The pumps shal l be cont r ol l ed by an ext er nal cont r ol l er / t i mer r ecei v i ng s i gnal s f r om t he makeup wat er met er .

SECTI ON 23 25 00 Page 16

c. Dr i ve mot or s shal l be 110 vol t , s i ngl e phase and shal l have dr i p- pr oof encl osur es. The t anks shal l be const r uct ed of [ mat er i al s compat i bl e wi t h t he chemi cal s t o be st or ed i n t he t ank] [ hi gh densi t y pol yet hyl ene] [ s t ai nl ess st eel ] [ f i ber r ei nf or ced pl ast i c] wi t h a hi nged cover and mount ed on l egs. Tanks shal l have f i l l i ng and dr ai n connect i ons and gauge gl ass. Each t ank shal l be f ur ni shed wi t h one pump, mount ed and pi ped wi t h bl ack i r on pi pe and f i t t i ngs, wi t h suct i on st r ai ner and st ai nl ess st eel scr een, and wi t h 13 mm 1/ 2 i nch r el i ef val ve wi t h st eel body and st ai nl ess st eel t r i m. Tank bot t om shal l be di shed concave t o a r adi us equal t o t he di amet er of t he t ank. Uni t s shal l be f or phosphat e, caust i c f eed and sul f i t e f eedi ng. Sul f i t e t ank shal l have a f l oat i ng cover t o compl et el y cover t he sur f ace of t he sol ut i on. Mot or - dr i ven agi t at or shal l be pr ovi ded. The t anks shal l have suf f i c i ent capaci t y t o r equi r e r echar gi ng onl y once per [ 7] [ 14] [ 21] [ _____] days dur i ng nor mal oper at i on.

2. 9. 3 Wat er Sof t eni ng Syst em

The wat er sof t eni ng syst em shal l be as speci f i ed i n Sect i on 22 31 00 WATER

SOFTENERS, CATI ON- EXCHANGE ( SODI UM CYCLE) .

2. 9. 4 Tr eat ed Wat er Li mi t s

The boi l er manuf act ur er shal l be consul t ed f or t he det er mi nat i on of t he boi l er wat er chemi cal composi t i on l i mi t s. The r eci r cul at i ng hot wat er chemi cal l i mi t s shal l be as f ol l ows unl ess di ct at ed di f f er ent l y by t he boi l er manuf act ur er ' s r ecommendat i ons:

pH 9.3-9.9

Sulfite 30- 60 ppm

Hardness Less t han 2. 0 ppm

2. 10 Test Ki t

One t est k i t of each t ype r equi r ed t o det er mi ne t he wat er qual i t y as out l i ned wi t hi n t he oper at i on and mai nt enance manual s shal l be pr ovi ded ( e. g. pH, har dness and sul f i t e) .

2. 11 STEAM BOI LER WATER TREATMENT

NOTE: The chemi cal pi pi ng wi l l be i ndi cat ed on t he dr awi ng. Pi pi ng f or f eedi ng sul f i t e wi l l be connect ed t o t he st or age sect i on of t he deaer at or or f eedwat er heat er or t o t he f eedwat er l i ne. Pi pi ng

SECTI ON 23 25 00 Page 17 f or ot her t r eat ment chemi cal s wi l l be connect ed t o t he boi l er dr um. The chemi cal shot f eeder wi l l not be r equi r ed f or l ar ger st eam boi l er s.

I f s t eam i s used f or cooki ng or humi di f i cat i on, a separ at e heat exchanger wi l l be r equi r ed due t o envi r onment al const r ai nt s wi t h t he use of ami nes ( AR 420- 49, 6- 5b) .

Pr ovi de a wat er t r eat ment syst em capabl e of f eedi ng chemi cal s and bl owdown of t he syst em t o pr event cor r osi on and scal e wi t hi n t he boi l er and pi pi ng di st r i but i on syst em. Tr eat t he wat er t o mai nt ai n t he condi t i ons r ecommended by t he boi l er manuf act ur er or UFC 3- 230- 03 ( Cent r al Boi l er Pl ant s) and PWTB 420- 49- 5 ( I ndust r i al Wat er Tr eat ment Pr ocedur es) .

Chemi cal s shal l meet r equi r ed f eder al , st at e, and l ocal envi r onment al r egul at i ons f or t he t r eat ment of boi l er s and di schar ge t o t he sani t ar y sewer . The ser v i ces of a company r egul ar l y engaged i n t he t r eat ment of boi l er s shal l be used t o det er mi ne t he cor r ect concent r at i ons r equi r ed f or wat er t r eat ment . The company shal l mai nt ai n t he chemi cal t r eat ment and pr ovi de al l chemi cal s r equi r ed f or a per i od of 1 year f r om t he dat e of occupancy. Fi l mi ng ami nes, hydr azi ne and chel ant s shal l not be used. The wat er t r eat ment chemi cal s shal l r emai n st abl e t hr oughout t he oper at i ng t emper at ur e r ange of t he syst em and shal l be compat i bl e wi t h pump seal s and ot her el ement s of t he syst em.

2. 11. 1 Boi l er Wat er Li mi t s

The boi l er wat er l i mi t s shal l be as f ol l ows unl ess di ct at ed di f f er ent l y by t he boi l er manuf act ur er ' s r ecommendat i ons:

Caust i c i t y ( OH) 20- 200 ppm

Tot al Al kal i ni t y ( CaCO3) 200- 800 ppm

Phosphat e ( PO4) 30- 60 ppm

Pol ymer ( di sper sant ) or Tanni n 5- 10 ppm or medi um col or , r espect i vel y

Di ssol ved Sol i ds ( wat er t ube boi l er s) 3000- 3500 ppm

Di ssol ved Sol i ds ( f i r e t ube boi l er s) 3500- 5000 ppm

Suspended Sol i ds 15 ppm Maxi mum

Sodi um Sul f i t e 20- 40 ppm

Silica Less t han 200 ppm

Di ssol ved Oxygen Less t han 7 ppb

Iron Less t han 10 ppm pH ( Condensat e) 7. 5 - 8

SECTI ON 23 25 00 Page 18

Conduct i v i t y ( Condensat e) Less t han 35 mi cr omhos

Har dness ( Condensat e and makeup) Less t han 2 ppm

The above l i mi t s appl y t o boi l er s oper at i ng above 100 kPa 15 psi up 2070 kPa 300 psi . Above 2070 kPa 300 psi t hese l i mi t s decr ease. Use ABMA or chemi cal vendor r ecommended l i mi t s above 2070 kPa 300 psi .

2. 11. 2 Wat er Sof t eni ng Syst em

NOTE: The makeup wat er anal ysi s and t he boi l er manuf act ur er ' s r ecommended f eed wat er condi t i ons wi l l be used t o det er mi ne t he need f or a wat er sof t ener . UFC 3- 230- 03 cont ai ns gener al gui dance f or t he sel ect i on. Gener al l y, al l boi l er s oper at i ng above 100 kPa 15 psi r equi r e sof t ened wat er .

The wat er sof t eni ng syst em shal l be as speci f i ed i n Sect i on 22 31 00 WATER

SOFTENERS, CATI ON- EXCHANGE ( SODI UM CYCLE) .

2. 11. 3 Boi l er Wat er Tr eat ment Syst em

The wat er t r eat ment syst em shal l be capabl e of aut omat i cal l y f eedi ng chemi cal s t o pr event cor r osi on and scal e wi t hi n t he boi l er and condensat e syst em. Aut omat i c chemi cal f eed syst ems shal l f eed chemi cal s i nt o t he boi l er based on makeup wat er r at e. El ect r i cal s i gnal s f r om a wat er met er on t he makeup wat er l i ne shal l be used t o cont r ol t he out put of chemi cal f eed pumps.

2. 11. 4 St eam Boi l er Chemi cal Feed Pumps and Tanks

a. Fur ni sh chemi cal f eed pumps and t anks as a package wi t h t he pumps mount ed on and pi pi ng connect ed t o t he t ank. The chemi cal f eed pumps shal l be posi t i ve di spl acement di aphr agm t ype. The pump cyl i nder s, pl unger s, bal l check val ves, and check val ve bodi es shal l be of cor r osi on r esi st ant mat er i al s sui t abl e f or t he chemi cal s bei ng pumped.

Cyl i nder s shal l be r epl aceabl e f or i ncr eased or r educed pr essur e or

SECTI ON 23 25 00 Page 19 capaci t y r anges. The f l ow r at e of t he pumps shal l be adj ust abl e f r om 0 t o 100 per cent whi l e i n oper at i on. Vol umet r i c accur acy of t he pumps shal l be wi t hi n one per cent over t he r ange i ndi cat ed. Pump capaci t i es shal l be adj ust abl e by posi t i oni ng cr ank pi n wi t h mi cr omet er set scr ews. St r oke l engt h scal e shal l be di v i ded i n per cent age gr aduat i ons engr aved on scal e.

b. The di schar ge pr essur e of pumps shal l not be l ess t han 1. 5 t i mes t he l i ne pr essur e at t he poi nt of connect i on. The pumps shal l be pr ovi ded wi t h a pr essur e r el i ef val ve and a check val ve mount ed i n t he pump di schar ge. The pumps shal l be cont r ol l ed by an ext er nal cont r ol l er / t i mer r ecei v i ng s i gnal s f r om t he makeup wat er met er .

c. Dr i ve mot or s shal l be 110 vol t , s i ngl e phase and shal l have dr i p- pr oof encl osur es. The t anks shal l be const r uct ed of [ mat er i al s compat i bl e wi t h t he chemi cal s t o be st or ed i n t he t ank] [ hi gh densi t y pol yet hyl ene] [ s t ai nl ess st eel ] [ f i ber r ei nf or ced pl ast i c] wi t h a hi nged cover and mount ed on l egs. Tanks shal l have f i l l i ng and dr ai n connect i ons and gauge gl ass. Each t ank shal l be f ur ni shed wi t h one pump, mount ed and pi ped wi t h bl ack i r on pi pe and f i t t i ngs, wi t h suct i on st r ai ner and st ai nl ess st eel scr een, and wi t h 13 mm 1/ 2 i nch r el i ef val ve wi t h st eel body and st ai nl ess st eel t r i m. Tank bot t om shal l be di shed concave t o a r adi us equal t o t he di amet er of t he t ank. The t ank f or sodi um sul f i t e wi l l have a f l oat i ng cover t o mi ni mi ze cont act wi t h ai r . Mot or - dr i ven agi t at or shal l be pr ovi ded. The t anks shal l have suf f i c i ent capaci t y t o r equi r e r echar gi ng onl y once per [ 7] [ 14] [ 21] [ _____] days dur i ng nor mal oper at i on.

2. 11. 5 St eam Boi l er Chemi cal I nj ect i on Assembl i es

Pr ovi de an i nj ect i on assembl y at each chemi cal i nj ect i on poi nt l ocat ed al ong t he boi l er pi pi ng as i ndi cat ed. The i nj ect i on assembl i es shal l be const r uct ed of s t ai nl ess st eel . The di schar ge of t he assembl i es shal l ext end t o t he cent er l i ne of t he pi pi ng. Each assembl y shal l i ncl ude a shut of f val ve and check val ve at t he poi nt of ent r ance i nt o t he wat er l i ne.

2. 11. 6 St eam Boi l er Wat er Met er

Pr ovi de t he wat er met er wi t h an el ect r i c cont act i ng r egi st er and r emot e accumul at i ve count er . I nst al l t he met er wi t hi n t he makeup wat er l i ne, as indicated.

2. 11. 7 St eam Boi l er Ti mer s

Ti mer s shal l be of t he aut omat i c r eset , adj ust abl e t ype, and el ect r i cal l y oper at ed. The t i mer s shal l be desi gned t o wor k wi t h t he cont act i ng head wat er met er s. The t i mer shoul d i ncl ude t he wat er met er cabl e.

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