Attach 2 - Spec Sheet Section (23 80 20.20 10).pdf

3rd Air Stream at B18 Complex AF Project Number: ZHTV220801 Wright-Patterson AFB, Dayton, OH P2#: 503968

SECTION 23 80 20. 20 10

GAS-FIRED AIR HEATERS - 2ND AIRSTREAM

05/20

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B40.100 (2013) Pressure Gauges and Gauge Attachments

ASME BPVC SEC VIII (2010) Boiler and Pressure Vessel Codes:

Section VIII Rules for Construction of Pressure Vessel

AMERICAN PETROLEUM INSTITUTE (API)

API RP 530 (2015) Calculation of Heater-tube Thickness in Petroleum Refineries

API 560 (2016) Fired Heaters for General Refinery Service

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2021) Motors and Generators

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 54 (2021) National Fuel Gas Code

NFPA 70 (2023) National Electrical Code

NFPA 85 (2019) Boiler and Combustion Systems Hazards Code

FM GLOBAL (FM)

FM APP GUIDE (updated on-line) Approval Guide http://www.approvalguide.com/

U.S. DEPARTMENT OF DEFENSE (DOD)

MIL-T-19646 (1990; Rev A; Notice 1 2021) Thermometer, Gas Actuated, Remote Reading

1.2 SUBMITTALS

Government approval is required for submittals prior to construction.See section 1.3 for detailed submittal descriptions. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SECTION 23 80 20.20 10 Page 1 Final Submittal

Solicitation: COMBO-AFRL-PZLEQ-2026-0007 Attachment 2

3r d Ai r St r eam at B18 Compl ex AF Pr oj ect Number : ZHTV220801 Wr i ght - Pat t er son AFB, Dayt on, OH P2#: 503968

SD- 01 Pr econst r uct i on Submi t t al s

Submi t t al Regi st er

Qual i t y Cont r ol Pl an

SD- 02 Shop Dr awi ngs

Cer t i f i ed Di mensi onal Gener al Ar r angement Dr awi ngs

Foundat i on Loadi ng Di agr ams I ncl udi ng Di mensi ons Of Mount i ngs And Basepl at es

St r uct ur al St eel Dr awi ngs

Bur ner Assembl y Dr awi ngs

Coi l Suppor t Det ai l s

I nst r ument at i on I nst al l at i on Det ai l s

El ect r i cal Schemat i cs And Wi r i ng Di agr ams For Bl ower Mot or

I nst r ument at i on And Cont r ol Schemat i cs, Wi r i ng Di agr ams, And Bi l l Of Mat er i al s

I nst r ument at i on And Cont r ol Ar r angement Dr awi ngs

SD- 03 Pr oduct Dat a

Combust i on Bl ower

Bl ower Mot or

Ai r Damper s

Gas Cont r ol Val ves

Gas I sol at i on Val ves

Bur ner And Pi l ot Det ai l s

Fl ame Saf eguar d And Bur ner Management Syst em

Tabul at i on Of Maxi mum El ect r i cal And I nst r ument Ai r Ut i l i t y Requi r ement s

I SA Dat a Sheet s For Al l I nst r ument s And Cont r ol s

Pr oduct Manual s, I nst al l at i on I nst r uct i ons And Cal i br at i on I nf or mat i on For Al l I nst r ument s And Cont r ol s

Ai r Heat er Cont r ol l er Code

Cont r ol Par amet er s, And Al er t And Danger Al ar m Set t i ngs Tabul at i on

SD- 05 Desi gn Dat a

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St r uct ur al St eel Cal cul at i ons

Tube Suppor t Cal cul at i ons

Ref r act or y Thi ckness Cal cul at i ons, I ncl udi ng Temper at ur e Gr adi ent s Thr ough Al l Ref r act or y Sect i ons And Sour ces Of Ther mal Conduct i v i t i es

Per f or mance Cur ves And Dat a Sheet s For Ai r Pr eheat er , Fans, Dr i ver s, Bur ner s, And Ot her Auxi l i ar y Equi pment

SD- 06 Test Repor t s

Wel di ng, Wel di ng Exami nat i on, And Wel di ng Test Pr ocedur es And Resul t s

Fact or y Test Per f or mance Pr ocedur es

Cer t i f i ed Fact or y Test Per f or mance Repor t s

Cer t i f i ed Hydr ost at i c Test Repor t s

Noi se Dat a Sheet s

SD- 07 Cer t i f i cat es

Fact or y Test i ng Cer t i f i cat i on

Mat er i al Saf et y Dat a Sheet s

Pr essur e Vessel Cer t i f i cat i on Dat a

War r ant y

SD- 08 Manuf act ur er ' s I nst r uct i ons

Ref r act or i es And I nsul at i on I nst al l at i on, Dr y- Out , And Test Pr ocedur es

Heat er I nst al l at i on And Assembl y Manual

Spar e Par t s Recommendat i ons And Pr i ce Li st

Pr eser vat i on, Packagi ng, And Shi ppi ng Pr ocedur es

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

Oper at i ng And Mai nt enance For The Heat er And For Auxi l i ar y Equi pment Such As Ai r Pr eheat er , Fans, Dr i ver s, Damper s, And Bur ner s

Mot or I nst al l at i on, Mai nt enance, And Oper at i ng I nst r uct i ons

SD- 11 Cl oseout Submi t t al s

Fi nal As- Bui l t Of :

Cer t i f i ed Di mensi onal Gener al Ar r angement Dr awi ngs Foundat i on Loadi ng Di agr ams I ncl udi ng Di mensi ons Of Mount i ngs And Basepl at es

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St r uct ur al St eel Dr awi ngs Bur ner Assembl y Dr awi ngs Coi l Suppor t Det ai l s I nst r ument at i on I nst al l at i on Det ai l s El ect r i cal Schemat i cs And Wi r i ng Di agr ams For Bl ower Mot or I nst r ument at i on And Cont r ol Schemat i cs, Wi r i ng Di agr ams, And Bi l l Of Mat er i al s I nst r ument at i on And Cont r ol Ar r angement Dr awi ngs Ai r Heat er Cont r ol l er Code Cont r ol Par amet er s, And Al er t And Danger Al ar m Set t i ngs Tabul at i on

1. 3 SUBMI TTAL DESCRI PTI ONS

1. 3. 1 Submi t t al Regi st er

Submi t t al Regi st er shal l conf or m t o Sect i on 01 33 00.

1. 3. 2 Qual i t y Cont r ol Pl an

Qual i t y Cont r ol Pl an shal l pr ovi de det ai l ed descr i pt i ons of t he pr ocesses, pr ocedur es, per sonnel r esponsi bi l i t i es and r epor t i ng pr ovi ded t o assur e t hat t he ai r heat er i s const r uct ed t o hi gh qual i t y mat er i al , manuf act ur i ng and assembl y st andar ds.

1. 3. 3 Shop Dr awi ngs

Shop Dr awi ngs shal l be pr ovi ded i n accor dance wi t h sect i on 01 33 00.

Pr el i mi nar y and f i nal shop dr awi ngs shal l be pr ovi ded. Pr opr i et ar y dr awi ngs ar e not r equi r ed.

1. 3. 3. 1 Gener al Ar r angement Dr awi ngs

Cer t i f i ed Di mensi onal Gener al Ar r angement Dr awi ngs shal l i ncl ude:

a. The pur chaser ’ s equi pment number , t he pr oj ect name and l ocat i on, t he pur chase or der number s, and t he vendor ’ s r ef er ence number .

b. Coi l t er mi nal s i zes, i ncl udi ng f l ange r at i ngs and f aci ngs; di mensi onal l ocat i ons; di r ect i on of pr ocess f l ow; and al l owabl e l oads, moment s, and f or ces on t er mi nal s.

c. Coi l and cr ossover ar r angement s, t ube spaci ngs, t ube di amet er s, t ube- wal l t hi cknesses, t ube l engt hs, mat er i al speci f i cat i ons, i ncl udi ng gr ades f or pr essur e par t s onl y, and al l ext ended sur f ace dat a.

d. Coi l desi gn pr essur es, hydr ost at i c t est pr essur es, desi gn f l ui d, and t ube- wal l t emper at ur es and cor r osi on al l owance.

e. A coi l desi gn code or r ecommended pr act i ce and f abr i cat i on code or speci f i cat i on.

f . Ref r act or y and i nsul at i on t ypes, t hi cknesses, and ser vi ce t emper at ur e r at i ngs.

g. Types and mat er i al s of anchor s f or r ef r act or y and i nsul at i on.

h. Locat i ons and number of access door s, obser vat i on door s, bur ner s, soot bl ower s, damper s, and i nst r ument and auxi l i ar y connect i ons.

i . Locat i ons and di mensi ons of pl at f or ms, l adder s, and st ai r ways.

j . Over al l di mensi ons, i ncl udi ng auxi l i ar y equi pment .

1. 3. 3. 2 Foundat i on Loadi ng Di agr ams

Foundat i on Loadi ng Di agr ams I ncl udi ng Di mensi ons Of Mount i ngs And Basepl at es shal l i ncl ude:

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a. Number and l ocat i on of pi er s and suppor t s.

b. Basepl at e di mensi ons.

c. Anchor bol t l ocat i ons, bol t di amet er s, and pr oj ect i on above f oundat i ons.

d. Dead l oads, l i ve l oads, wi nd or ear t hquake l oads, r eact i on t o over t ur ni ng moment s, and l at er al shear l oads.

1. 3. 3. 3 Addi t i onal Dr awi ngs and Di agr ams

Pr ovi de t he f ol l owi ng dr awi ngs and di agr ams:

a. St r uct ur al St eel Dr awi ngs; det ai l s of st acks, duct s, and damper s

b. Bur ner Assembl y Dr awi ngs

c. Coi l Suppor t Det ai l s

d. I nst r ument at i on I nst al l at i on Det ai l s

e. El ect r i cal Schemat i cs And Wi r i ng Di agr ams For Bl ower Mot or f . I nst r ument at i on And Cont r ol Schemat i cs, Wi r i ng Di agr ams, And Bi l l Of

Mat er i al s

g. I nst r ument at i on And Cont r ol Ar r angement Dr awi ngs

1. 3. 4 Pr oduct Dat a

Pr ovi de pr oduct dat a f or t he f ol l owi ng:

a. Combust i on Bl ower

b. Bl ower Mot or

c. Ai r Damper s

d. Gas Cont r ol Val ves

e. Gas I sol at i on Val ves f . Bur ner And Pi l ot Det ai l s

g. Fl ame Saf eguar d And Bur ner Management Syst em

h. Tabul at i on Of Maxi mum El ect r i cal And I nst r ument Ai r Ut i l i t y

Requi r ement s i . I SA Dat a Sheet s For Al l I nst r ument s And Cont r ol s j . Pr oduct Manual s, I nst al l at i on I nst r uct i ons And Cal i br at i on I nf or mat i on

For Al l I nst r ument s And Cont r ol s

k. Ai r Heat er Cont r ol l er Code l . Cont r ol Par amet er s, And Al er t And Danger Al ar m Set t i ngs Tabul at i on

1. 3. 5 Desi gn Dat a

Pr ovi de t he f ol l owi ng desi gn dat a:

a. St r uct ur al St eel Cal cul at i ons

b. Tube Suppor t Cal cul at i ons

c. Ref r act or y Thi ckness Cal cul at i ons, I ncl udi ng Temper at ur e Gr adi ent s

Thr ough Al l Ref r act or y Sect i ons And Sour ces Of Ther mal Conduct i v i t i es

d. Per f or mance Cur ves And Dat a Sheet s For Ai r Pr eheat er , Fans, Dr i ver s, Bur ner s, And Ot her Auxi l i ar y Equi pment

1. 3. 6 Test Repor t s

Test Repor t s shal l i ncl ude l ogged dat a f or f act or y r unni ng t est s and shal l i ncl ude cur ves and envel ope showi ng t he as- bui l t per f or mance char act er i st i cs of pr essur e, f l ow and t emper at ur e at al l oper at i ng condi t i ons. Pr ovi de t he f ol l owi ng t est r epor t s:

a. Wel di ng, Wel di ng Exami nat i on, And Wel di ng Test Pr ocedur es And Resul t s

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b. Cer t i f i ed Fact or y Test Per f or mance Repor t s, or on- si t e commi ssi oni ng r epor t t hat can ver i f y per f or mance.

c. Cer t i f i ed Hydr ost at i c Test Repor t s

d. Noi se Dat a Sheet s

1. 3. 7 Cer t i f i cat es

Pr ovi de t he f ol l owi ng cer t i f i cat es:

a. Submi t a Fact or y Test i ng Cer t i f i cat i on st at i ng t hat t he heat er manuf act ur er has t he equi pment and capabi l i t y t o per f or m al l r equi r ed f act or y t est s.

b. Mat er i al Saf et y Dat a Sheet s

c. Pr essur e Vessel Cer t i f i cat i on Dat a

d. Pr ovi de manuf act ur er ' s War r ant y cover i ng al l aspect s of qual i t y and wor kmanshi p f or t he ai r heat er syst em f or one year af t er f i nal i zat i on of commi ssi oni ng. War r ant i es shal l be avai l abl e t o cover del ays i n i nst al l at i on and ext ensi ons af t er commi ssi oni ng.

1. 3. 8 Manuf act ur er ' s I nst r uct i on

Pr ovi de manuf act ur er ' s i nst r uct i ons f or t he f ol l owi ng:

a. Ref r act or i es And I nsul at i on I nst al l at i on, Dr y- Out , And Test Pr ocedur es

b. Heat er I nst al l at i on And Assembl y Manual

c. Spar e Par t s Recommendat i ons And Pr i ce Li st

d. Pr eser vat i on, Packagi ng, And Shi ppi ng Pr ocedur es

1. 3. 9 Oper at i on and Mai nt enance Dat a

Pr ovi de t he f ol l owi ng Oper at i on and Mai nt enance Dat a:

a. Oper at i ng And Mai nt enance For The Heat er And For Auxi l i ar y Equi pment Such As Ai r Pr eheat er , Fans, Dr i ver s, Damper s, And Bur ner s

b. Mot or I nst al l at i on, Mai nt enance, And Oper at i ng I nst r uct i ons

1. 3. 10 Cl oseout Submi t t al s

Cl oseout Submi t t al s shal l i ncl ude f i nal as- bui l t ver si ons of al l shop dr awi ngs.

1. 4 EXTRA MATERI ALS

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, and not l at er t han 2 mont hs pr i or t o t he dat e of benef i c i al oper at i on. I ncl ude i n t he dat a a compl et e l i s t of par t s and suppl i es, wi t h cur r ent uni t pr i ces and sour ce of suppl y.

PART 2 PRODUCTS

2. 1 MATERI ALS AND EQUI PMENT

2. 1. 1 Gener al

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 manuf act ur i ng of t he pr oduct s and t hat essent i al l y dupl i cat e equi pment t hat has been i n sat i sf act or y use at l east 2 year s pr i or t o bi d openi ng. Al l gas f i r ed equi pment must meet t he

SECTI ON 23 80 20. 20 10 Page 6 r equi r ement s of NFPA 54.

2. 1. 2 Namepl at es

Secur e a pl at e t o each maj or component of equi pment cont ai ni ng t he manuf act ur er ' s name, addr ess, t ype or st y l e, model or ser i al number , and cat al og number .

2. 1. 3 Equi pment Guar ds

Compl et el y encl ose or guar d bel t s, pul l eys, chai ns, gear s, coupl i ngs, pr oj ect i ng set scr ews, keys, and ot her r ot at i ng par t s so l ocat ed t hat any per son may come i n c l ose pr oxi mi t y t her et o. Guar d or cover hi gh- t emper at ur e equi pment and pi pi ng so l ocat ed as t o endanger per sonnel or cr eat e a f i r e hazar d wi t h i nsul at i on of t ype speci f i ed f or ser vi ce.

2. 2 ELECTRI CAL WORK

Pr ovi de el ect r i cal mot or dr i ven equi pment 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 connect i ons shal l be 480VAC/ 3ph or 120VAC/ 1ph. Pr ovi de mot or s conf or mi ng t o NEMA MG 1. Pr ovi de el ect r i cal char act er i st i cs as speci f i ed or i ndi cat ed. Pr ovi de pr emi um ef f i c i ency i nt egr al s i ze mot or s i n accor dance wi t h NEMA MG 1. 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 speci f i ed. Each mot or must 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 t hr ough al l t emper at ur e r anges i n summer and wi nt er . 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 and cont r ol s power devi ces r equi r ed f or cont r ol s and devi ces speci f i ed, but not shown, must be pr ovi ded. Al l el ect r i cal wor k shal l meet t he r equi r ement s of NFPA 70.

2. 3 AI R HEATERS

Heat er shal l be pr ovi ded as compl et e heat er - bur ner package, i ncl udi ng i nt egr al f or ced dr af t bur ner , coi l s, heat er t r i m, r ef r act or y, i nsul at i on, cont r ol s, f uel t r ai n and accessor y component s. Heat er - bur ner package shal l be pr ovi ded f ul l y f act or y assembl ed and t est ed. I f r equi r ed f or shi ppi ng, t he ai r heat er may be shi pped i n pi eces and f i el d assembl ed r eady f or gr ound mount i ng and connect i on t o pr ocess ai r i nt ake/ di schar ge, pl ant compr essed ai r , el ect r i cal , nat ur al gas, vent and cont r ol l i nes.

Equi pment desi gn and accessor y i nst al l at i ons shal l per mi t accessi bi l i t y f or mai nt enance and ser vi ce. Heat er shal l compl y wi t h NFPA 85/ 87. Heat er shal l be desi gned f or wor ki ng pr essur e of 750 psi g and oper at i ng pr essur e of 825 psi g. The ai r heat er shal l be capabl e of cont i nuousl y pr oduci ng heat ed compr essed ai r at condi t i ons l i s t ed bel ow. Heat er oper at i on shal l be st abl e at al l poi nt s of oper at i on wi t hi n t he r anges of t emper at ur es, pr essur es and f l ows l i s t ed bel ow. The ai r heat er shal l be pr ovi ded capabl e of oper at i ng dai l y and al so capabl e of oper at i ng af t er a per i od of i nact i v i t y of up t o 30 days wi t h no damage t o t he heat exchanger or any ot her component s.

2. 3. 1 Per f or mance

a. Pr ocess Ai r I nl et Pr essur e Range: 300 - 750 psi g

b. Pr ocess Ai r I nl et Temper at ur e: 100 degr ees F

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c. Pr ocess Ai r I nl et Fl ow Range: 2. 5 - 34 l bm/ s

d. Pr ocess Ai r Di schar ge Temper at ur e Range: 250 - 1, 250 degr ees F

e. Heat er Oper at i on Per i od: up t o 16 hour s cont i nuousl y

2. 3. 2 Const r uct i on

Pr ovi de heat er s i n accor dance wi t h ANSI St andar ds and t he r equi r ement s of NFPA and API 560.

2. 3. 2. 1 Out door I nst al l at i on

a. Ai r heat er shal l be sui t abl e f or out door i nst al l at i on. Pr ovi de adequat e weat her and cor r osi on pr ot ect i on t o ensur e r el i abl e ser vi ce l i f e over a 25- year per i od, wi t h mi ni mal degr adat i on due t o exposur e t o out door ambi ent condi t i ons. The ai r heat er wi l l be i nst al l ed near an act i ve r oadway whi ch wi l l expose al l ar eas of t he heat er t o possi bl e sal t spr ay. The ext er i or f i ni sh shal l compl y wi t h ASTM B117.

b. Ai r heat er shal l be equi pped t o pr ovi de saf e and st abl e oper at i on whi l e achi evi ng per f or mance i ndi cat ed when oper at i ng at ext r eme out door t emper at ur es encount er ed by t he i nst al l at i on. Revi ew hi st or i cal weat her dat abase and pr ovi de equi pment t hat can oper at e at ext r eme out door t emper at ur es r ecor ded over past 30- year per i od.

2. 3. 2. 2 Heat er Casi ng and I nsul at i on

Heat er shal l be compl et el y encased i n a doubl e casi ng and f i l l ed wi t h bl anket i nsul at i on. Ext er i or casi ng shal l be const r uct ed of not l i ght er t han 1/ 4 i nch wel ded st eel sheet s pr i med and pai nt ed desi gned f or i nst al l at i on out door s. I nt er nal casi ng shal l be const r uct ed of not l i ght er t han 24 gauge wel ded 304 st ai nl ess st eel or bet t er sheet s. Casi ng shal l be gast i ght and shal l be r ei nf or ced wi t h st r uct ur al st eel t o pr ovi de r i gi di t y and pr event buckl i ng. I nsul at i on shal l be of suf f i c i ent t hi ckness t o ensur e a maxi mum casi ng t emper at ur e not t o exceed 140 degr ees F wi t h a sur f ace ai r vel oci t y of 50 f pm and an ambi ent ai r t emper at ur e of 100 degr ees F when oper at i ng at f ul l capaci t y. I nsul at i on mat er i al and i nst al l at i on shal l be as r ecommended by t he heat er manuf act ur er .

I nsul at i on mat er i al shal l not be negat i vel y i mpact ed by t he oper at i ng f r equency or dur at i on of oper at i on as l i s t ed i n sect i on 2. 3. 1 - Per f or mance. Ref r act or y and i nsul at i on shal l be f act or y i nst al l ed.

2. 3. 2. 3 Suppor t s

Ai r heat er equi pment shal l be suppor t ed f r om t he f oundat i on wi t h st r uct ur al st eel i ndependent of t he f oundat i on. Heat er suppor t s shal l per mi t f r ee expansi on and cont r act i on of each por t i on of t he heat er wi t hout pl aci ng undue st r ess on any par t of t he heat er or set t i ng. For l i f t i ng and handl i ng of t he heat er , l i f t i ng l ugs shal l be wel ded t o t he heat er dr um. Heat er ski d shal l be r ei nf or ced and pr ovi ded wi t h space beneat h t he end of t he beam f or j acki ng t he uni t dur i ng i nst al l at i on.

Hol es shal l be pr ovi ded i n t he mai n beam f or use by a r i gger t o dr ag or l i f t t he uni t by i t s base f r ame f or f i nal posi t i oni ng, unl ess t hi s met hod i s not r ecommended by t he heat er manuf act ur er .

2. 3. 2. 4 Pi pi ng, Ter mi nal s and Mani f ol ds

a. The mi ni mum cor r osi on al l owance shal l be i n accor dance wi t h API

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St andar d 560 sect i on 7. 1. 2.

b. Al l f l anges shal l be wel di ng- neck f l anges. Fl anges on t he i nl et “ col d” s i de t o be Cl ass 600# RTJ. Fl anges on t he out l et “ hot ” s i de t o be Cl ass 1500# f l at f aced.

c. Pi pi ng, t er mi nal s, and mani f ol ds ext er nal t o t he heat er encl osur e shal l be i n accor dance wi t h I SO15649.

d. Thr eaded connect i ons shal l not be used f or mai n pr ocess and f uel gas.

e. Pr ovi de l ow- poi nt dr ai ns and hi gh- poi nt vent s. The dr ai ns and vent s shal l be accessi bl e f r om out si de t he heat er casi ng.

f . Mani f ol ds i nsi de a header box shal l be sel ect ed f or t he same desi gn pr essur e as t he connect i ng t ubes and f or a desi gn t emper at ur e equal t o t he maxi mum f l ui d oper at i ng t emper at ur e at t hat l ocat i on pl us a mi ni mum of 30° C ( 55° F) .

g. Ext er nal cr ossover pi pi ng shal l be of t he same met al l ur gy as t he pr ecedi ng heat er t ube; i nt er nal cr ossover pi pi ng shal l be of t he same met al l ur gy as t he r adi ant t ubes.

2. 3. 2. 5 Ladder Access

a. Pr ovi de access l adder s at l ocat i ons r equi r ed t o access equi pment mor e t han 6f t above gr ade.

b. An i nt er medi at e l andi ng shal l be pr ovi ded i f t he ver t i cal r i se exceeds 30f t f or l adder s.

c. Ladder s shal l be caged f r om a poi nt 7. 5f t above gr ade or any pl at f or m.

A sel f - c l osi ng saf et y gat e shal l be pr ovi ded f or al l l adder s ser vi ng pl at f or ms and l andi ngs. Ladder s shal l be ar r anged f or s i de st ep- of f ;

st ep- t hr ough l adder s shal l not be used.

2. 3. 2. 6 Heat Exchanger

Compl y wi t h t he r equi r ement s of API 560 sect i on 7. The pr ocess heat exchanger shal l be of t he hel i cal coi l t ype. Tubes shal l be f or med f r om 316 st ai nl ess st eel or bet t er . Tubes shal l not be l ess t han 4 i nches i n di amet er and t he t hi ckness shal l be det er mi ned i n accor dance wi t h API RP 530. Coi l wel ds shal l r ecei ve 100 per cent r adi ogr aphi c i nspect i on.

Tubes shal l be bent t o a t r ue r adi us. Tubes t hat ar e di st or t ed i n bendi ng, f l at t ened or r i dged ar e not accept abl e. Desi gn of t he t ubes shal l per mi t t ubes t o dr ai n by gr avi t y. Coi l suppor t s shal l be f abr i cat ed mat er i al ( s) opt i mi zed t o pr ovi de cor r osi on r esi st ance at t he heat er s mi ni mum and maxi mum oper at i ng t emper at ur e. The coi l suppor t s shal l be desi gned t o mi ni mi ze expansi on and cr eep due t o f r equent heat er cycl i ng ( ON- OFF and modul at i on) .

a. Cal cul at i ons made t o det er mi ne t ube- wal l t hi ckness f or coi l s shal l i ncl ude consi der at i ons f or er osi on and cor r osi on al l owances f or t he var i ous coi l mat er i al s. The cor r osi on al l owances shal l be 0. 040 i n.

b. Maxi mum t ube- met al t emper at ur e shal l be det er mi ned i n accor dance wi t h API 530. The t ube- met al t emper at ur e al l owance shal l be at l east 25 degr ees F.

SECTI ON 23 80 20. 20 10 Page 9

c. Al l t ubes shal l be axi al l y seaml ess. El ect r i c f l ash wel di ng shal l not be used f or i nt er medi at e wel ds. Tubes f ur ni shed t o an aver age wal l t hi ckness shal l be i n accor dance wi t h sui t abl e t ol er ances so t hat t he r equi r ed mi ni mum wal l t hi ckness i s pr ovi ded.

2. 3. 2. 7 Economi zer

Pr ovi de economi zer or pr ocess ai r pr e- heat er t hat i s capabl e of pr e- heat i ng i ncomi ng pr ocess ai r usi ng combust i on f l ue gasses passi ng t hr ough a heat exchanger bef or e bei ng vent ed t o at mospher e.

a. Heat er shal l be f ur ni shed wi t h a packaged ext ended sur f ace economi zer .

Economi zer shal l be shop assembl ed and shi pped compl et e wi t h st r uct ur al st eel f r ame, i nner casi ng and shop appl i ed i nsul at i on.

Economi zer shal l be desi gned and f abr i cat ed i n accor dance wi t h ASME BPVC SEC VI I I . Fl ue gas f l ow t hr ough economi zer shal l be ver t i cal .

b. Economi zer shal l be of cont i nuous t ube, l oop t ube desi gn. Mi ni mum desi gn t emper at ur e of t he economi zer shal l be 700 degr ees F.

Economi zer shal l be hydr ost at i cal l y f act or y t est ed at 1. 5 t i mes t he t ube si de desi gn pr essur e. The uni t shal l be ASME code st amped and shal l i ncl ude namepl at e and code document at i on.

c. Header s and t ubes shal l be 316 st ai nl ess st eel wi t h mi ni mum Schedul e 40 wal l t hi ckness and equi pped wi t h mi ni mum ANSI Cl ass 600 r ai sed f ace wel d neck f l anged connect i ons. Header wal l t hi ckness and f l ange r at i ng shal l be dependent on t ube si de desi gn pr essur e i n accor dance wi t h ASME BPVC SEC VI I I r equi r ement s. Tube ar r angement shal l be of t he open l at t i ce desi gn. Dr i l l ed t ube sheet s ar e not accept abl e.

d. The economi zer shal l be i nsul at ed wi t h a mi ni mum 2 i nch t hi ck bl anket t ype i nsul at i on or appr oved equal .

e. Out er casi ng shal l be weat her pr oof wi t h a mi ni mum 1/ 4 i nch wel ded st eel sheet s f act or y pr i med and pai nt ed f or out door exposur e. Exposed sur f aces not encl osed by out er casi ng shal l be pai nt ed wi t h hi gh t emper at ur e pai nt .

f . Access door or f l anged i nspect i on pl at e ( 2" mi ni mum) , of gal vani zed st eel const r uct i on, shal l be pr ovi ded i n t he economi zer desi gn.

Access door shal l be i nsul at ed.

g. Pr ovi de col d- end t emper at ur e cont r ol t o mai nt ai n t he t emper at ur e of al l f l ue gas wet t ed sur f aces above t he f l ue gas aci d dew poi nt ( FGADP) t emper at ur e. Mai nt ai n t he exchanger ’ s col d- end sur f ace t emper at ur es above t he FGADP t emper at ur e t o avoi d t he har mf ul ef f ect s of aci d dew poi nt cor r osi on and mi ni mi ze t he unwant ed deposi t i on of aci di c sal t s f r om condensat i on and par t i cul at e mat t er on wet sur f aces t hat i mpede t he per f or mance of t he exchanger .

2. 3. 2. 8 St acks

The desi gn of st acks, duct s, and br eechi ngs shal l be i n accor dance wi t h API 560 sect i on 13.

a. St acks shal l be sel f - suppor t i ng and shal l be bol t ed t o t hei r suppor t i ng st r uct ur e.

b. A cor r osi on- r esi st ant met al cap shoul d be pr ovi ded at t he t op of t he

SECTI ON 23 80 20. 20 10 Page 10 st ack l i ni ng r ef r act or y t o pr ot ect i t s hor i zont al sur f ace f r om t he weat her .

c. St acks, duct s, and br eechi ng shal l be desi gned f or al l appl i cabl e l oad condi t i ons expect ed dur i ng shi pment , er ect i on, and oper at i on. Snow and i ce shal l be consi der ed, par t i cul ar l y when t he f i r ed heat er i s not i n oper at i on. These l oad condi t i ons shal l i ncl ude, but not be l i mi t ed t o, dead l oad, wi nd l oad, ear t hquake l oad, l i ve l oad, and t her mal l oad.

d. The mi ni mum t hi ckness of t he st ack shel l pl at e shal l be 1/ 4 i n. , i ncl udi ng cor r osi on al l owance. The mi ni mum cor r osi on al l owance shal l be 1/ 16 i n. f or l i ned st acks and 1/ 8 i n. f or unl i ned st acks.

e. The mat er i al of t he st ack, br eechi ng, and duct shal l be adequat e f or al l l oad condi t i ons at t he l owest ambi ent t emper at ur e at t he i nst al l l ocat i on when t he f i r ed heat er i s not i n oper at i on.

2. 3. 2. 9 Access Door s

The heat er shal l be pr ovi ded wi t h access door s i n suf f i c i ent number , s i ze and l ocat i on f or c l eani ng, i nspect i on and r epai r ( see l ocat i ons bel ow) .

Access door shal l be gast i ght and i nt er i or sur f aces exposed t o di r ect r adi at i on and hi gh t emper at ur e shal l be l i ned wi t h appr oved r ef r act or y mat er i al t o pr event excessi ve heat l oss. Access door s shal l be pr ot ect ed f r om di r ect r adi at i on by a r ef r act or y syst em of at l east t he same t her mal r at i ng and r esi st ance as t he adj acent wal l l i ni ng. Access door s t hat ar e l ar ge or wei gh mor e t han 50 pounds shal l be hi nged.

a. One access door havi ng a mi ni mum cl ear openi ng of 18i n. by 18i n. shal l be pr ovi ded i n t he f l oor f or ver t i cal cyl i ndr i cal heat er s. A bol t ed and gasket ed access door shal l al so be pr ovi ded i n any ai r pl enum bel ow t he f l oor accessway. Wher e space i s not avai l abl e, access vi a a bur ner por t i s accept abl e.

b. Obser vat i on door s and por t s shal l be pr ovi ded f or v i ewi ng al l r adi ant t ubes and al l bur ner f l ames f or pr oper oper at i on and f or l i ght - of f .

2. 4 FUEL BURNI NG EQUI PMENT

Fuel bur ni ng equi pment shal l be pr ovi ded compl et e wi t h f l ame saf eguar d syst em, f or ced dr af t l ow NOx bur ner , pi pi ng, f uel t r ai ns and i nst r ument at i on suppl i ed as a f act or y assembl ed and mount ed package on t he heat er f r ont . Packaged bur ner shal l be capabl e of f i r i ng t he heat er at a cont i nuous r at e, usi ng nat ur al gas at 30 psi g as an i nt egr al uni t .

Emi ssi ons guar ant ees shal l appl y t hr ough speci f i ed t ur ndown r ange. Bur ner shal l have a st abl e f l ame over t he t ur ndown r ange. Submi t an Envi r onment al Per mi t Compl i ance cer t i f i cat e r egar di ng t he heat er emi ssi ons.

2. 4. 1 Pi l ot

a. Pi l ot bur ner shal l be nat ur al gas- el ect r i c t ype wi t h t he capaci t y r equi r ed t o r el i abl y l i ght of f t he heat er . A 6, 000 vol t secondar y s i de i gni t i on t r ansf or mer shal l be suppl i ed and mount ed backsi de of t he wi ndbox.

b. Pr ovi s i on shal l be made i n t he bur ner housi ng f or i nspect i on of t he pi l ot f l ame.

c. Pi l ot shal l be pr ovi ded wi t h i ndi v i dual manual shut - of f val ve, pr essur e

SECTI ON 23 80 20. 20 10 Page 11 gauge, pr essur e r egul at i on separ at e f r om t he mai n bur ner , sel f c l osi ng sol enoi d val ve and vent val ve i n accor dance wi t h FM APP GUI DE and UL 795. Pi l ot and val v i ng shal l be i n accor dance wi t h NFPA 85.

2. 4. 2 Combust i on Ai r Bl ower

Combust i on ai r f an shal l be cent r i f ugal t ype wi t h backwar dl y i ncl i ned ai r f oi l bl aded wheel . Combust i on ai r - f an wheel shal l be di r ect l y dr i ven by a TEFC NEMA f r ame mot or and shal l be compl et e wi t h i nl et cone and scr een and f l ange out l et . Combust i on ai r f an shal l be bot t om f l anged t o be mount ed on same st r uct ur al member as wi ndbox. Combust i on ai r - f an shal l be s i zed t o pr ovi de suf f i c i ent st at i c pr essur e t o over come syst em l osses when pr ovi di ng 15 per cent excess ai r at maxi mum f i r i ng r at e, pl us t he amount of f l ue gas i nduced t o compl y wi t h t he NOx emi ssi on r equi r ement s. The combust i on ai r bl ower mot or shal l be pr ovi ded wi t h a TEFC encl osur e and a r at ed power f act or of gr eat er t han 0. 85. The bl ower mot or shal l be pr ovi ded wi t h a sol i d- st at e r educed vol t age st ar t er or var i abl e f r equency dr i ve.

2. 4. 3 Combust i on Ai r Damper

Combust i on ai r damper shal l be f l anged and l ocat ed bet ween combust i on ai r f an and wi ndbox. Combust i on ai r damper shal l be sui t abl e f or speci f i ed t ur ndown and shal l pr ovi de same t ur ndown per f or mance when up t o 15 per cent f l ue gas i s i nduced and mi xed i n t he ai r st r eam.

2. 4. 4 Nat ur al Gas Bur ner

Nat ur al gas bur ner shal l be a mul t i - spud bur ner wi t h gas f eed pi pe i n cent er of ai r r egi st er f or easy r emoval . Nat ur al gas bur ner shal l be f or ced dr af t t ype and shal l be sui t abl e f or ef f i c i ent l y bur ni ng nat ur al gas havi ng a cal or i f i c val ue of 1, 050 Bt u per cubi c f oot when suppl i ed at a pr essur e of appr oxi mat el y 30 psi g. Nat ur al gas shal l be di schar ged i n bur ner t hr oat ar ea. Nat ur al gas- ai r pr emi x or nat ur al gas di schar ged out si de of bur ner t hr oat ar e not accept abl e. Mai n nat ur al gas bur ner shal l be capabl e of f i r i ng t he heat er t o maxi mum capaci t y wi t h t ur ndown as r equi r ed t o pr ovi de st abl e oper at i on over t he r ange of t emper at ur es, pr essur es and f l ows as l i s t ed i n 2. 3. 1 - Per f or mance. Nat ur al gas bur ner s shal l be of t ype, s i ze and so l ocat ed and ar r anged t hat i n no case shal l t he f l ame i mpi nge on any sur f ace i n t he heat er nor shal l t he f l ame ext end beyond t he l i mi t s of t he bur ner .

2. 4. 5 Heat er Pi pi ng Tr ai ns

Pi pi ng t r ai n shal l be compl et el y pr epi ped, wi r ed and mount ed on heat er .

Nat ur al gas t r ai n shal l be i n accor dance wi t h NFPA and FM st andar ds and r equi r ement s and shal l i ncl ude but not be l i mi t ed t o f ol l owi ng i t ems:

2. 4. 5. 1 Nat ur al Gas Tr ai n

a. Compl y wi t h NFPA 54.

b. Nat ur al gas f l ow cont r ol val ve wi t h char act er i z i ng adj ust ment s t o mat ch ai r f l ow.

c. Manual shut - of f val ve ( NO) at suppl y and di schar ge of vent and dr ai n val ves.

d. Manual shut - of f val ve ( NO) at pi l ot nat ur al gas suppl y and di schar ge

SECTI ON 23 80 20. 20 10 Page 12 of vent and dr ai n val ve.

e. Manual shut - of f val ve ( NO) at mai n nat ur al gas val ve suppl y and di schar ge.

f . Y- t ype st r ai ner suppl i ed i n pi l ot nat ur al gas and mai n nat ur al gas l i nes.

g. Two ( NC) sol enoi d saf et y shut - of f val ves, i n ser i es, i n pi l ot l i ne wi t h one ( NO) sol enoi d vent val ve l ocat ed bet ween saf et y shut - of f val ves, pi ped t o at mospher e.

h. Two shut - of f val ves wi t h pr oof of c l osur e, pi ped i n ser i es i n mai n gas l i ne wi t h one ( NO) sol enoi d vent val ve l ocat ed bet ween saf et y shut - of f val ves, pi ped t o at mospher e.

i . One pr essur e r egul at i ng val ve i n pi l ot nat ur al gas l i ne t o r egul at e nat ur al gas pr essur e t o i gni t er .

j . One pr essur e r egul at i ng val ve t o r egul at e mai n nat ur al gas pr essur e at nat ur al gas t r ai n i nl et .

k. Nat ur al gas met er . Tot al i z i ng wi t h pul se out put f or r emot e moni t or i ng.

l . Nat ur al gas f l ow t r ansmi t t er f or mai n nat ur al gas t o bur ner .

m. Pr essur e gauge, wi t h shut - of f val ve f or mai n nat ur al gas suppl y.

n. Pr essur e gauge, wi t h shut - of f val ve f or mai n nat ur al gas at bur ner .

o. Pr essur e gauge, wi t h shut - of f val ve f or nat ur al gas suppl y t o pi l ot .

p. Pr essur e gauge, wi t h shut - of f val ve f or nat ur al gas pi l ot .

q. Low nat ur al gas pr essur e swi t ch.

r . Hi gh nat ur al gas pr essur e swi t ch.

2. 5 CONTROLS

Pr ovi de a compl et e el ect r oni c i nst r ument at i on and cont r ol syst em. The cont r ol syst em shal l ut i l i ze one mast er pr ogr ammabl e l ogi c cont r ol l er ( PLC) f or moni t or i ng al l syst em f unct i ons and I / O i nt er f aces. Al l syst em i nst r ument at i on shal l be connect ed t o & moni t or ed by t hi s mast er PLC.

Any/ al l subsyst em devi ces t hat ar e par t of t he ai r heat er syst em as a whol e ( e. g. BMFS, Bur ner Management Fl ame Saf eguar d syst em) shal l be i nt er f aced wi t h and be moni t or ed by t hi s mast er PLC. Any gas t r ai n devi ces t hat ar e di r ect l y moni t or ed/ cont r ol l ed by t he BMFS shal l be connect ed di r ect l y t o t he BMFS. Al l dat a poi nt s f r om t hi s mast er PLC and al l connect ed subsyst ems shal l be made avai l abl e on al l HMI s and vi a a s i ngl e Et her net i nt er f ace on t hi s mast er PLC ( f or Cust omer Super vi sor y Syst em I nt er f ace) .

2. 5. 1 Cont r ol Funct i ons

The PLC shal l cont r ol t he ai r heat er syst em t o meet out put pr ocess ai r t emper at ur e, and coi l t ube over t emper at ur e, r equi r ement s. The cont r ol l er shal l per mi t user i nput t o modi f y t hese set poi nt s wi t hi n t he oper at i onal envel ope of t he ai r heat er syst em. The cont r ol l er shal l al l ow t he heat er

SECTI ON 23 80 20. 20 10 Page 13 t o per f or m wi t hi n t he ent i r e per f or mance cr i t er i a st at ed ear l i er .

a. The out put pr ocess ai r t emper at ur e PI D cont r ol shal l use t he mai n out put pr ocess ai r t emper at ur e as i t s pr ocess i nput .

b. The coi l t ube over t emper at ur e PI D cont r ol shal l over r i de t he ai r t emper at ur e cont r ol t o mai nt ai n t he coi l t ubes under t hei r hi gh t emper at ur e l i mi t .

c. The f uel - t o- ai r r at i o cont r ol shal l be mechani cal or el ect r oni c and shal l keep t he r at i o at an opt i mal poi nt f or t he ent i r e oper at i onal envel ope of t he heat er .

d. Oper at or over r i de cont r ol of t he f i r e r at e of t he ext er nal f i r e r at e s i gnal shal l be avai l abl e.

2. 5. 2 Cont r ol Encl osur e and Ter mi nat i ons

2. 5. 2. 1 Ter mi nal Encl osur e

Al l i nst r ument at i on shal l be wi r ed t o a t er mi nal encl osur e bef or e r out i ng t o t he ai r heat er mast er PLC cont r ol l er ( f aci l i t at i ng a f ut ur e r epl acement of t he PLC when obsol et e) . The t er mi nat i on may be wi t hi n t he pr i mar y cont r ol encl osur e.

2. 5. 2. 2 Cont r ol Encl osur e

A cont r ol uni t encl osur e conf or mi ng t o NEMA I CS 6, f act or y desi gned, assembl ed, and mount ed shal l be pr ovi ded compl et e wi t h connect i ons made t o sensi ng and cont r ol poi nt s. The encl osur e shal l be f abr i cat ed of f or med st r et cher l evel ed sheet st eel , r ei nf or ced, and assembl ed i nt o a r i gi d uni t . Gasket ed access door s shal l be pr ovi ded as r equi r ed. Pr ovi de encl osur e handl e set wi t h an i nt egr al l oop/ pr ovi s i on t o accept a cust omer - pr ovi ded, f ul l - s i ze padl ock. Thi s out door encl osur e shal l meet NEMA 4x r equi r ement s and pr ovi de pr ot ect i on wi t h r espect t o har mf ul ef f ect s on t he equi pment due t o t he i ngr ess of wat er ( r ai n, s l eet , snow, spl ashi ng wat er , and hose di r ect ed wat er ) , pr ovi de addi t i onal l evel of pr ot ect i on agai nst cor r osi on and wi l l be undamaged by i ce f or mat i on.

Pr ovi de an encl osur e heat er f or t he l ocal cont r ol encl osur e t o mai nt ai n a mi ni mum t emper at ur e.

2. 5. 2. 3 Cont r ol Power

Cont r ol power shal l der i ve f r om a cont r ol power t r ansf or mer and subsequent power suppl i es connect ed t o t he pr i mar y 480VAC f eed t o t he heat er .

2. 5. 3 Cont r ol I nt er f ace Panel s

Two cont r ol i nt er f ance panel s shal l be pr ovi ded wher e one i s l ocal at t he ai r heat er and one i s l ocat ed r emot el y i n an adj acent bui l di ng.

2. 5. 3. 1 Local Cont r ol I nt er f ace Panel

The l ocal cont r ol i nt er f ace panel shal l be l ocat ed at t he l ocal Cont r ol Encl osur e. Any ext er i or f aci ng cont r ol s/ HMI s shal l have adequat e NEMA 4 pr ot ect i on f r om har mf ul envi r onment al condi t i ons. The l ocal cont r ol i nt er f ace panel shal l i ncl ude al l user cont r ol , moni t or i ng and al ar mi ng f unct i ons needed t o f ul l y oper at e t he ai r heat er . Thi s shal l i ncl ude at a mi ni mum:

SECTI ON 23 80 20. 20 10 Page 14

a. Di scr et e devi ces f or bur ner cont r ol , bur ner r eset , combust i on bl ower st ar t / st op wi t h i ndi cat i on, and an emer gency st op but t on.

b. An i ndust r i al HMI col or t ouchscr een di spl ay t hat shows al l i nst r ument at i on and cont r ol par amet er s of t he ai r heat er syst em. The di spl ay shal l be 12- i nch di agonal mi ni mum t o accommodat e al l heat er sensor di spl ays and gr aphi cs.

( 1) The HMI shal l al so i ncl ude act i ve al ar m i ndi cat i on and hi st or i cal al ar m l oggi ng. Loggi ng shal l be of FI FO conf i gur at i on wi t h a 30 day mi ni mum buf f er .

( 2) Act i ve al ar m st at us shal l i ncl ude sensor t ag, sensi ng l evel and al ar m dat e/ t i me.

( 3) Hi st or i cal al ar m st at us shal l i ncl ude sensor t ag, sensi ng l evel and al ar m dat e/ t i me.

( 4) A t abul at i on of t he st ar t up and r unni ng per mi ssi ves shal l be pr ovi ded

( 5) A st at us di spl ay of t he bur ner management f l ame saf eguar d syst em shal l be pr ovi ded.

c. On/ of f Di sconnect swi t ch f or cont r ol panel power ( l ocat ed behi nd t he f ace of t he panel ) .

2. 5. 3. 2 Remot e Cont r ol I nt er f ace Panel

The r emot e cont r ol i nt er f ace panel shal l mount i nt o a st andar d 19- i nch wi de r ack bl anki ng panel and be no t al l er t han 14 i nches ( 8 r ack uni t s) .

The r emot e panel shal l have as a mi ni mum:

a. An Et her net - based i ndust r i al HMI col or t ouchscr een di spl ay t hat shows al l i nst r ument at i on and cont r ol par amet er s of t he ai r heat er syst em.

The HMI di spl ay shal l be 12- i nch di agonal mi ni mum t o accommodat e al l heat er sensor di spl ays and gr aphi cs.

( 1) The HMI shal l al so i ncl ude act i ve al ar m i ndi cat i on and hi st or i cal al ar m l oggi ng. Loggi ng shal l be of FI FO conf i gur at i on wi t h a 30 day mi ni mum buf f er .

( 2) Act i ve al ar m st at us shal l i ncl ude sensor t ag, sensi ng l evel and al ar m dat e/ t i me.

( 3) Hi st or i cal al ar m st at us shal l i ncl ude sensor t ag, sensi ng l evel and al ar m dat e/ t i me.

( 4) A t abul at i on of t he st ar t up and r unni ng per mi ssi ves shal l be pr ovi ded.

( 5) A st at us di spl ay of t he bur ner management f l ame saf eguar d syst em shal l be pr ovi ded.

b. On/ of f Di sconnect swi t ch f or cont r ol panel power ( l ocat ed behi nd t he f ace of t he panel ) .

2. 5. 4 Al ar m Types f or Act i ve and Hi st or i cal

a. Al er t al ar ms shal l i ndi cat e a non- st andar d condi t i on on t he ai r heat er syst em. These al ar ms shal l be l ogged.

b. Danger al ar ms shal l i ndi cat e a hazar dous condi t i on t hat t he heat er may be damaged i f i t cont i nues. Danger al ar ms shut t he heat er down. These al ar ms shal l be l ogged.

SECTI ON 23 80 20. 20 10 Page 15

c. Bot h t ypes of al ar ms ( al er t & danger ) shal l have vi sual and audi bl e annunci at or s at t he l ocal Cont r ol I nt er f ace Panel onl y ( not at t he r emot e Cont r ol I nt er f ace Panel ) . Audi bl e annunci at or s ar e t o be of t he 30mm, 2900HZ, 95dB t ype.

2. 5. 5 Per mi ssi ves

a. St ar t up per mi ssi ves shal l al l be sat i sf i ed bef or e t he ai r heat er bur ner i s avai l abl e t o st ar t . These cont r ol syst em i nput s shal l be f r om t he i nt er nal ai r heat er syst em or f r om ext er nal i ndi cat i on. Ext er nal i ndi cat i on may i ncl ude pr ocess ai r f l ow and ot her i ndi cat or s.

I ndi cat i on shal l be made t o show al l per mi ssi ves have been sat i sf i ed and t he ai r heat er bur ner i s r eady t o st ar t . St ar t i ng shal l onl y occur by t he oper at or pr essi ng t he bur ner ON sel ect or l ocal l y and r emot el y. The combust i on bl ower may have separ at e st ar t up per mi ssi ves r equi r ed bef or e st ar t up.

b. Runni ng per mi ssi ves shal l al l be sat i sf i ed t o keep t he ai r heat er r unni ng. The l oss of any of t hese per mi ssi ves shal l cause a danger al ar m and shal l di sabl e t he r un per mi ssi ve shut t i ng of f t he bur ner .

The st op but t on, any sensor or swi t ch i ndi cat i ng danger and any appl i cabl e ext er nal i ndi cat or s shal l cause a l oss of r un per mi ssi ve.

The combust i on bl ower shal l have i t s own r un per mi ssi ves and shal l shut down i f t he bl ower st op but t on i s pr essed or t he emer gency st op but t on i s pr essed.

2. 5. 6 Bur ner Management Fl ame Saf eguar d Syst em

a. A bur ner management f l ame saf eguar d ( BMFS) cont r ol syst em shal l be mi cr opr ocessor - based and pr ovi de:

( 1) Aut omat i c sequenci ng of t he bur ner syst em t hr ough pr epur ge, pi l ot t r i al f or i gni t i on ( PTFI ) , mai n t r i al f or i gni t i on ( MTFI ) , r un ( AUTO) , and post pur ge.

( 2) Fl ame pr ovi ng and l ockout on f l ame f ai l ur e dur i ng PTFI , MTFI , and

AUTO.

b. The BMFS cont r ol shal l be mount ed i n t he heat er cont r ol cabi net . Fl ame saf eguar d syst em component s shal l be UL l i s t ed. Compl et e and aut omat i c f l ame saf eguar d syst em shal l be pr ovi ded i n accor dance wi t h NFPA r equi r ement s saf e st ar t - up, on- l i ne oper at i on and shut - down of package bur ner .

c. Fl ame saf eguar d syst em shal l be mi cr o- pr ocessor based syst em i ncl udi ng, but not l i mi t ed t o, aut omat i c bur ner sequenci ng, f l ame super vi s i on, st at us i ndi cat i on, f i r e- out annunci at i on and sel f di agnost i cs.

d. Pr ovi de a moni t or i ng and cont r ol connect i on bet ween t he BMFS syst em and t he ai r heat er mast er PLC usi ng Modbus/ TCP t o al l ow moni t or i ng of al l BMFS syst em dat a poi nt s by t he mast er PLC.

e. A sel f - check ul t r avi ol et f l ame scanni ng det ect i on syst em.

f . Fl ame pr ovi ng and l ockout on f l ame f ai l ur e dur i ng PTFI , MTFI and AUTO.

Fl ame f ai l ur e s i gnal shal l be di spl ayed on f l ame saf eguar d di spl ay or bur ner cont r ol panel .

g. Logi c pr ovi ded wi t h f l ame saf eguar d syst em shal l :

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( 1) Pr event i nt r oduct i on of i gni t er f l ame ( pi l ot ) or mai n f uel f l ame t o bur ner unt i l bur ner , heat er passes and st ack have been pur ged of combust i bl e gases.

( 2) Pr event openi ng of aut omat i c f uel shut - of f val ves i n mai n f uel l i ne unt i l i gni t er f l ame i s pr oven.

( 3) Li mi t t r i al f or mai n f uel i gni t i on t o t en ( 10) seconds f r om t i me i gni t er f l ame i s pr oven.

( 4) I n event of bur ner f ai l ur e, oper at or i nt er vent i on shal l be r equi r ed t o manual l y r eset f l ame saf eguar d cont r ol l er pr i or t o r est ar t .

h. The BMFS syst em shal l pr ovi de a check- r un swi t ch t o al l ow a qual i f i ed ser vi ce t echni c i an t o hal t t he bur ner sequence i n any of f i ve di f f er ent posi t i ons:

( 1) Hi gh f i r e pur ge ( 2) Low f i r e pur ge ( 3) Pi l ot t r i al f or i gni t i on ( 4) Mai n t r i al f or i gni t i on ( 5) Low f i r e ( bur ner on) i . A di spl ay modul e shal l consi st of a t wo ( 2) l i ne wi t h s i xt een ( 16) char act er s per l i ne l i qui d cr yst al ( LCD) or vacuum f l uor escent ( VFD) di spl ay and mul t i - f unct i onal 4- key, posi t i ve act i on keypad.

j . A pr e- wi r ed or t er mi nal bl ock wi r i ng base shal l be pr ovi ded whi ch wi l l al l ow f or al l syst em t er mi nat i ons t o be compl et el y wi r ed pr i or t o t he i nst al l at i on of t he cont r ol . The cont r ol shal l be r emovabl e or r epl aceabl e wi t hout r emovi ng any wi r i ng t er mi nat i ons.

k. The cont r ol wi l l cont i nual l y t est t he st at us of al l saf et y cr i t i cal l oads ( i gni t i on t r ansf or mer , pi l ot f uel val ve, mai n f uel val ve) t o i nsur e t hey ar e oper at i ng pr oper l y.

2. 5. 7 Cust omer Super vi sor y Syst em I nt er f ace

The ai r heat er syst em mast er cont r ol PLC wi l l pr ovi de an Et her net - based i nt er f ace f or cust omer connect i on t o t he cust omer ' s exi st i ng f aci l i t y SCADA syst em. Al l anal og and di scr et e i nst r ument at i on dat a poi nt s, al l cont r ol out put , al l al ar m, and al l cont r ol f unct i onal par amet er s dat a shal l be accessi bl e t hr ough t hi s i nt er f ace. Al l avai l abl e dat a poi nt s shal l be f ul l y descr i bed i n a wr i t t en or di gi t al dat a def i ni t i on pr ovi ded by t he manuf act ur er . Al l dat a poi nt s shal l be accessi bl e v i a t he OPC- UA pr ot ocol ( wi t h secur e connect i on opt i ons avai l abl e) . Modbus/ TCP pr ot ocol may be subst i t ut ed upon cust omer ' s appr oval .

2. 5. 8 Updat e / Ref r esh Rat es of Dat a

Suf f i c i ent I / O, pr ocessi ng and communi cat i on har dwar e shal l be pr ovi ded t o meet or exceed t he f ol l owi ng dat a updat e r at es:

a. Al l I nst r ument at i on f or l oggi ng and al ar mi ng = 1 sampl e per second.

b. Al l I nst r ument at i on and cont r ol s f or c l osed l oop f eedback cont r ol = 10 sampl es per second.

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2. 5. 9 Pr essur e Sensor s

Pr essur e sensor s shal l be equi val ent t o Vi at r an model 34A f or pr essur e and 374 f or di f f er ent i al pr essur e. An i sol at i on val ve and cal i br at i on por t shal l be pr ovi ded at each pr essur e sensor l ocat i on. Pr essur e sensor s ar e r equi r ed i n t he f ol l owi ng l ocat i on at a mi ni mum:

a. Pr ocess ai r i nl et and out l et .

b. Nat ur al Gas suppl y.

c. Combust i on ai r bl ower di schar ge.

d. Di f f er ent i al pr essur e acr oss combust i on chamber .

e. I nst r ument ai r pr essur e ( 60 - 125 psi g) . Sel ect pr essur e gauge di al r ange t o be 125% of maxi mum oper at i ng pr essur e.

2. 5. 10 Temper at ur e Sensor s

Al l t emper at ur e measur ement s shal l use K- t ype t her mocoupl es. Temper at ur e sensor s ar e r equi r ed i n t he f ol l owi ng l ocat i on at a mi ni mum:

a. Pr ocess ai r i nl et and out l et .

b. Combust i on chamber .

c. Four t ube wal l t emper at ur es at heat exchanger ' s hot t est l ocat i ons.

Lead wi r e, i nsul at or s, and pr ot ect i ve sheat hs shal l be desi gned t o accommodat e al l ant i c i pat ed t ube movement . Pr ot ect i ve sheat hs shal l be made gas- t i ght and const r uct ed of t ype310 st ai nl ess st eel or ot her al l oy sui t abl e f or t he oper at i ng condi t i ons. Such sheat hs shal l be at t ached t o t he heat er t ubes by wel ded cl i ps or bands. Al l t her mocoupl e assembl i es shal l t er mi nat e on t he ext er i or shel l of t he f i r ed heat er wi t h a t her mocoupl e head.

d. Economi zer out l et .

e. Fl ue gas st ack.

2. 5. 11 Fl ow I nst r ument s

a. Nat ur al Gas Fl ow: Fl ow met er wi t h 1. 50 per cent accur acy t hr oughout t he oper at i ng r ange. Fl ow met er shal l be desi gned f or out door i nst al l at i on.

2. 5. 12 Moni t or i ng I nst r ument s

Pr ovi de t he f ol l owi ng moni t or i ng i nst r ument s i n addi t i on t o t he moni t or and saf et y cont r ol s. Pr essur e gauges shal l conf or m t o ASME B40. 100, 4 1/ 2 i nch, bl ack mar ki ng poi nt er , s i ngl e bour don t ube, st ai nl ess st eel case.

Pr ovi de pr essur e gauges wi t h a pr essur e snubber and a st ai nl ess st eel bar st ock needl e i sol at i on val ve. Ther momet er s shal l be ext ended st ai nl ess st eel sheat hed bi met al l i c st em, 3 1/ 2 i nch di al , and separ abl e 4 i nch st ai nl ess st eel wel l s. Temper at ur e measur ement s at i naccessi bl e l ocat i ons shal l be made wi t h r emot e r eadi ng t her momet er s conf or mi ng t o MI L- T- 19646, Cl ass C separ abl e wel l of Type 304 st ai nl ess st eel . Sel ect pr essur e and t emper at ur e gauge r anges t o gi ve a nor mal oper at i ng r eadi ng near t he mi dpoi nt of t he scal e r ange.

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