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7411d Gencral: Equipmentshall havc a minimum peilormance nlMc
<br />specilied rating tonditions not lesa than t�e values shown in Table 144A
<br />Nmuqh 14�1G. II a natianally rocoB�aeE cmli/ication pmgram et1515b� a
<br />productcovemtl in Tables 74.1P lhmuBh 1d4G, anE ilinclvdes pmvisions
<br />lot veril¢ation and challen0� of eQulpmenl elGcienry �atinps, lhen the
<br />pmtlucl shall be IisteO In Iha ceM1diwiron pmpram.
<br />Oas-liicd and oll-fired lorcetl air lumaces wdh inpul roGnps? 225,000
<br />�W/h (85 hW) shall ulso Aavv an inte�millenl lgnition o� Intermp�etl tlavice
<br />(IID), and have either mechaninl Grafl (incluEinp powervenlinp) ora Nue
<br />Eampec A vont tlamper ia an acceplablo almmative lo a Ilve damper lor
<br />fumacas w�are combuslion air is tlrawn Imm l�e condrtionetl s0ace. FII
<br />IumaceswM1h Input mting%' 225,OU� Btvlh (OS kW), Inclutlinp elecVic
<br />Wmoces, lhal a�e nol lowbd wdhin Ne conEitianetl epace s�ell �ave
<br />jackat losse� not eMceediny 0.75X ot Ihe �nput ralinq.
<br />14N.2 Rating Condltions: Gonling epuipment ahall be rated at ARI test
<br />condifions ontl pmcedures when available. W hem no applicable
<br />pmcetlures etist, tlata shall be Iwnis�oC by Ihe equipmeni manulacWror.
<br />14f 1.7 ComClnatlon Spaco ontl Servico Watnr Heating: fo�
<br />combinalion spaca and servica walar hmters wiih a p�incipal hnclion ol
<br />pmvidln8 space heol, the CombineE Annual Elficiency (CAE) may be
<br />calculaletl Cy ming PSHRAE StantlarE 12<•1981. Sto�ape waler �eaters
<br />useE in cambinetion space heet and waler heat epplicalianc cAoll �ava
<br />eilhet an Ennav FAcmr (EF) or a CAE aluot less t�en t�e lollowinp:
<br />f411.4 PackagoG Eloctric Noating anE GoaIInB Equlpmant: PackagaE
<br />eleclric equipment pmviding poth healinB and caoling wiN a tolal cooling
<br />capaciry gmaterUan 20,000 BiWh shall be a hoal pump.
<br />Exceptlon: Unsbliatl a0uipmont s�aeitors ar cehlnaU usa0
<br />solely loi Oorsanal wiwless service IacilM1ias.
<br />141Y Conlrols
<br />741Y.1 Tamparatur¢ Contrais: Ea<� syctem s�all be pmvitled with at
<br />Ieast one �emperalura conUol tlevice. Each zone sh�ll be contralletl by
<br />inErvitlual t�e�mostalic canlmis �espanEinp to IempemWm wR�ln lAe ione.
<br />At a minimum, each ilao� ol a building shall0e cansidcred oe o veparele
<br />zone.
<br />1412.P DeatlOanE CanlrOls: W�en usad la conirol bot� comlorl haating
<br />antl coalinp. iono lhvrmosialic canimis shell bc capeblo oi e Ceadband at
<br />a[ laast 5 degroes F wiNin which t�e supPly ol hea�ing and coolinp enupy
<br />to thc zone is shut oll or mducetl �o a mmimum.
<br />Ezceptlons:
<br />1. Specialaccupency,apenalusago,orcoEeteqaimmenls
<br />wAom Eoedband con�mL• arrt mta00�optiate.
<br />�. BWidingc complyin8 wil� Sac�ian 11A1 d, il in Ihe pmposaE
<br />Cuilding enerpy analysis, heating and cooling Nermosbt
<br />setpoinls a�e cel to Ihe same Icmpe�alu�a belween 70
<br />JeBrees F and 75 deBrecs F inclusrvo, and ascumetl b be
<br />canslant m�oughoul the ycai.
<br />3. Thermastalslhalreqwromanualchanpvoverbetweon
<br />hcalin9 antl rooling modas.
<br />1471.J Hum Itlity Controle: II a syatem Is equipped wilh a means lai
<br />ntltlin0 maisiure, a �umidis�al shall be provitletl.
<br />141Y.4 Sclback and S�uL011: HVAC systems z�all ba oquipPatl wiV�
<br />automatic canirols capoble ot accomplis�in9 a reCuclion ol enorpY uee
<br />thwup� conbol satback or equipment shutdown AurinB Periods ol non�usa
<br />or aitemato use ol t�e cpacee served by Iha sy¢Iem. The automalic
<br />cont�als shall havn a minimum seven�day clock antl be capaCle ol being
<br />so� lor sevon tllllomn� day rypes pe� woak.
<br />Exceptlons:
<br />1. Systems serving areas whlch require conlinuous apoeoGon al
<br />tM1e cama tampanWm salpoint.
<br />2. EQuipmentwiih Iuli loaE tlemands a12 kW (8,828 91ulh) or
<br />lezs may be controliatl by readily accessiblo manual a�Lhour
<br />conirols.
<br />1412.9.1 Dampers: Oubide an Iniakes, eNauel ouilols antl relicl oulleis
<br />scrving cnndi�ionod sparos shall be equippeE wi0 damperswhich clase
<br />automatically w�en I�e system is o�l or upon po�..m taiWm.
<br />Eviceptlons:
<br />1. Systems serving emas w�ic� mquim conlinuous ope�ation.
<br />. Cambuelionairintakes.
<br />3. Graviry (nonmotorizeC) tlampers are acceptaEle In builClnpe
<br />less than 3 slaties in heigM.
<br />4. Gravily (nonmotoriietl) tlampe�e are acceplablo In eahavnt
<br />antl reliei ouVets in I�v firzl etory antl levels belaw the lirst
<br />ctory al buildinps lhme or mara staries in heighl.
<br />191Y.O.Y Optlmum Stah Can[mis: Hmlinp anC cooliny systeme wilh
<br />dcsign sapplyaircvpacitiv. caccedinp 10,000 clm shall havo optlmum
<br />atart controls. Optimum atart contmis shall ba desi9nod to aulomatically
<br />adjuei Ihe start limo ol an HVAC system oach day lo btinB ��e spaca lo
<br />tlesiretl eccupietl romOmaNre levels ImmeEiately belore schetlulatl
<br />accupancy. T�e control algo�ilhm s�all, as a minimum, Ee a lunction ol Ne
<br />dil/eronco be�vom soacv IemperaNro end occupied setpoint untl the
<br />omounl of Ilmo peior 1a schetluleC oeeupeney.
<br />14/25 Hvat Pump Cantrols: Unitary alr coaleE �eul pumps sAell inclutle
<br />micmpmcessor conbols Ihat minimize eopP�"mental heat usaBe tluring
<br />slart•uD. �eFup, and Eebost canditions. These conlmis shall anticipate
<br />necd lon c�ai antl use comprcsslon healin9 as t�o lint ai�pe at heat.
<br />CaNmis sha111nJiwlv whon zupPlemanlal healinp is Ooinp uwC Ihrough
<br />vlsual mearm �e.g., LED Intllcalun).
<br />1412.6 ComEusUon Meatinp Equlpment Controls: Cambutlian �ealinp
<br />oqoipmenl wilh a capaeiiy ovm 235,OOOBIu/� shall have motlulalinp o�
<br />sta➢etl cambustion conlml
<br />Ezeeptlons:
<br />i eon��s.
<br />I. RatllanlHealers.
<br />sAall havc a mcans lo� Ealancing, includlnB �ul nol4mikE lo, Campen,
<br />IemperaNre and pmssure �esi cannections antl balancinp vaNes.
<br />7473 Alr Economli¢rs
<br />7473dOpa�atlon: Pirecanamrseroshalibaotautomalinllymotluiating
<br />ouUlEe and reNm air dnmpers to O�ovide 100 percen� o! lha tleslgn supply
<br />air es outside ai� m reduca ar eliminale l�v naed lor mee�anlcal cooling.
<br />Water oconamBeu z�all bv caP�01e ol p�ovidinp Ne lotai concurrent
<br />coolin9 �oad sarved by lhe conneted terminal equipmentlacking alrsiCe
<br />econamixer, at outsiEe alr temperalwes ot AS°F dry�bulb/A0`F webbulb
<br />and belaw For Ihis calculatiaq all laclorc including solar antl inlarmi load
<br />s�all be t�e same as t�ose usetl lar peak laatl calculalions, except tor the
<br />ouisitle tempa�aiu�os.
<br />Exceptlon: W eter economliers usin9 alo-cooletl �eat releclion
<br />equipment may use a 75°F dry•bulb outside eir lempnreWm br
<br />ihis caleulotian. T�is exception is IimiteE to a manimum ol 20 tans
<br />pm builtlinp.
<br />t<1].2 Documentation: Wator economiier pbns submitted tar appmval
<br />shall inclutlo Ihe �ollowin9 ���otmalion:
<br />1. Marimumautsideairmndilionslorwhkheconomizeriesizedto
<br />p�ovide lull caolinq.
<br />]. Dosign cooling load lo be provided hy ecanomixer et ihi� oulaiEv
<br />air condi�ion.
<br />3. Hoetrryeclionandlormiwlepuipmnntperformancadata
<br />inclueinp moEel number. Ilow ratv, capaeiry, enlotlnp antl Ieavinp
<br />�emporaW ra in lull economlzar toolinp made.
<br />74f 3.31nteBrateO Operatlon: Alr economizers shall be capa0le af
<br />pmvidinB partial caolin9 even when atldilionel mac�anicel coaling is
<br />requimd lo meotlhe mmaindar al lhe toalin0 �oad.
<br />Ezeeptlons:
<br />i. Intlivqual, Eimcl e�pansion unib Ihal have o ratetl capaci�y
<br />Ivss Ihan 65,000 BtWh antl uze nonlnlegntetl ecanomizer
<br />conlrols Ihal preclutle simultaneoun opeia�ian ul lhe
<br />eronomixet antl mec�anical coolinp.
<br />4. Watencooletl wale� chillers wilh watnaiEe economizm.
<br />f47J.4 HumICl/icatlon: It an oir economizer is roqulred an a cooling
<br />system lor w�ich �umitlificalion equipmenl is to be pw�ideE lo maintain
<br />miNmum Intloor humidity lovelc, I�en ihs �umi0ilior c�all ba ol ihe
<br />atliaEatic type (dlmc� evapamlrve meEia ot log atam¢alion lype).
<br />Exceptlons:
<br />7. HeaIN caro lacilitiea whem WAC 246�320�575 allows only
<br />steam injeclion humidiiius In tluctwark tlawns�rcam ol l�inal
<br />lillers. 7412.6 Combustion HeaUnp EquipmenlConlwls:
<br />Cambustian �ealing equipmenlwi�h a capaciry over 225,00�
<br />Btulh shall havc motlulating a� s�aged combustion caNml.
<br />2 SySiemswi��walerecanomixer
<br />3. t00X autsiEa air syslemswith no pmvlslonslor air
<br />mcirculalion lo Nc cenirel supply lan.
<br />4. Nonadiabatic humidllierc cumulatively servin9 no more than
<br />70% ol o EuiltlinB's an acenemilet capaciry as measored in
<br />cim. Thls rcfine lo Ne syslem clm servinB �ooms wii� sbnC
<br />alono or ducl mountetl �umitlilie�s.
<br />1474 Duetlnp Systams
<br />1419d Sealln0� Oucl wark whi<h is Cesl9�ed ta operale at prossures
<br />ebove 121nc� watar calumn slaUc pmssum shall be aealetl in accordance
<br />wlth5tantlatdRS4B. EHtenlofsealin8«9uimCi�nslollows:
<br />1. Slatic pressum: 12 inc� l0 2lnchas; cealUenevatsa lointz.
<br />Y. Slalie prcssum: 4 inches m 3 inches; seal o0lnnsverse jainK
<br />•�tl lanpifutlinal seamz.
<br />3. Staticpressure' abaveJinches;sealallUansvene�oln[s,
<br />IOfIBRY410i� 60if1:6 dpd tlYCI Wd�� P0118�lpIi0f16.
<br />Oucl tupe anE olher prcssura sensitiw tape ehall nol be uaed a s tba
<br />primary sealant w�em ducts am desiBnaE lo aperate at abGe P�essurcc ol
<br />1 inch W.C. or gieater.
<br />1414.Y Ineuiatlon: OucK antl pienums Ihalam consbucie0 and lunclion
<br />as part of ��e CuildinB envelope. by se0arating inle�ior space Irom ezteria�
<br />epoce, chall meet all applica�le requi�emenls oi C�apter 19. Thesa
<br />�aquimmenh incluEe insublion installation, moishm conlml, aiNoakaBo,
<br />ond buil!in0 envebpa insulalion levels. Unhaatetl eQuipmenlrooma w�th
<br />r,omhusiion atr lowcre muzt be isolateC Imm ine canEi�ionetl space Oy
<br />insulating inte�ior sunc�os lo a miaimum ol R�11 and any oxia�ior
<br />envvlape sutlaces per Chapter 13. Outsidc air tlucts serving inElvltlual
<br />supply alr unita wM1h less t�an 3,800 cim ol btal supPly al� capacity shall Eo
<br />insulated to o minimvm ol R4 antl am nol connHemd builEinp envelape.
<br />Olheroutsida airduct runn em consiCered builtlin0 onvelape until Ney,
<br />7, conneclto t�e �ealinp o� caa6n0 eQuipment, o�
<br />2. a�c isolated Imm Iha avteriorwilh an automatie sAubalt tlamper
<br />complying wilh Seclion 1412A.1.
<br />Once outaitle airtluc6 mevtNe a0ove '!ed mquimmenB, ony mns
<br />wilhin canditianed space sAall camplywilh' �e 19S requircmenls.
<br />Ol�er ducts and plenums shall be thermairy Insulated per Tabla 14-5.
<br />Ezcaptlons:
<br />1. Wdhin lhe HVAC equi0menl.
<br />2. ExnauslairtlucKna[aubJecltown0enae[ion.
<br />J. GMpoaetlOuclworkwithinaionelhalserveelhat2ane.
<br />7413 Plpinp Systnms
<br />1415.1 Insulatlon: Piping shall0e �humally insulated in accordancc with
<br />raeio �a-a.
<br />Ezccptlon: Pipinq meblletl within unitary HVAG eyuipmenl.
<br />Wole� pipos oulside I�e contlitionetl apace �hall Ee IncubleE i0
<br />acco�danro witb Washin9�on Stale Plumbing Cotle (WAC 51-]8)
<br />7416 Completion ftequlrcments (Reler foNREC Secl'an 7416 antl the
<br />BuilEinO �ommisaanin0 Guidelinea, Ou6liaheC by Ne BuiMinp
<br />Commuaionin0 A�sociofian, lor compble lert ond O�belinex !oi builtling
<br />compklion enC rommisaioninA /�9���amenlsJ
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