V-SERIES™ APPLICATION GUIDE ARCHITECTS • ENGINEERS • BUILDERS

3.2 SOUNDCONSIDERATIONS 3.1 GENERALCONSIDERATIONS 3. UNITLOCATION 2.5 GAS ANDELECTRICALTERNATIVES 2.4 INTERCHANGEABLEWITHEARLIERMODELS 2.3 HERMETICALLY SEALEDREFRIGERATION SYSTEM 2.2 SLIDE-OUTCOOLING CHASSIS INDIVIDUAL COMFORT CONTROL 2.1 TOTALLY PACKAGED HVAC SYSTEM PROVIDES STAGE OFDEVELOPMENT 2. MAGIC-PAK: DESIGNEDANDBUILT FOR EVERY 1. PURPOSE OFTHISMANUAL TABLE OFCONTENTS 7.5 SEALINGWALL SLEEVE 7.4 SEALINGRETURN-AIR DUCTS 7.3 INTRODUCTIONOFVENTILATION AIR 7.2 AIRINFILTRATION 7.1 WATER INFILTRATION 7. INFILTRATION 6.5 AIRNOISE 6.4 DETERMINATION OFSOUNDRATING VALUES 6.3 CLEARANCES OR OBJECTS 6.2 RADIATED SOUNDANDRESONANTSURFACES 6.1 VIBRATION TRANSMISSION 6. NOISETRANSMISSION 5.5 METAL STUDS 5.4 POUREDCONCRETE WALLS 5.3 CEMENTBLOCK WALLS 5.2 WOOD-FRAME WALLS 5.1 SUPPORT 5. TYPESOFWALL CONSTRUCTION 4.3 WEATHER-PROOFING WALL SLEEVES 4.2 RECESSED SLEEVES 4.1 INSTALLATION 4. WALL SLEEVES 3.4 VENTLOCATION FOR GAS MODELS 3.3 ACCESSIBILITY 6.5.2. RETURN-AIR DUCTSYSTEM 6.5.1. SUPPLY-AIR DUCTSYSTEM

12. SPECIALCONSIDERATION FOR GAS UNITS 11. AIRFILTER 10. ELECTRICALSERVICE WIRING 9.2 HIGHEFFICIENCY UNITS 9.1 CONDENSATE DRAIN 9. CONDENSATE 8.4 CONTROL OFSOUND WITHLOUVERED 8.3 CONSIDERATIONS FOR CUSTOM 8.2 OUTSIDE APPEARANCEVARIATIONS 8.1 GRILLEANDLOUVER FURNISHEDONMAGIC-PAK LOUVERS 8. OUTSIDE DECORATIVE FACADES, GRILLESOR

3 | V-SERIES™ APPLICATION GUIDE 4 | V-SERIES™ APPLICATION GUIDE conditions. building construction andoperating experience for varying typesof compiled comprehensive practical States andCanada,we have installed throughout theUnited hundreds of thousandsof units Over theseyears withliterally and mechanicalcontractors. popular amongbuildingdesigners buildings hasproven increasingly condominiums andapartment heating andcooling inhigh-rise Magic-Pak concept of providing For over 50years, the buildings. considering theuseofMagic-Pak heating andcooling equipmentinmulti-dwelling This manualprovides assistance to architects anddesignengineerswhoare 1. PURPOSE OFTHISMANUAL future. concept oftoday andinsures that theseunitswill never become “orphans” inthe Dedication to thisinterchangeability withearliermodels isbasicto theMagic-Pak older Magic-Pak models.For more information, contact application specialist. surface and designfor higher efficiencies,butthechassis will stillfitthe version units.The chassis built today includemoderntechno­ obsolescence. Replacement chassis are onlyavailable for unitsgoingbackto Another advantage oftheslide-outchassis istheonethat eliminates concerns of 2.4 INTERCHANGEABLEWITHEARLIERMODELS for highlytrained personnelat thetimeofinstallation orstart up. tested before placement inany unit.This comprehensive testing eliminates theneed checked for leakswithsensitive electronic equipment,andthoroughly performance V-Series slide­ The hermeticallysealedrefrigeration system isanotherfeature ofMagic-Pak’s 2.3 HERMETICALLY SEALEDREFRIGERATION SYSTEM training ortrade credentials often required to work onrefrigeration systems. maintenance personnelcaneasilyperform thisfunctionwithouttherefrigeration any cooling chassis may bereplaced withanotherinminutes. Infact, building contributor to theever-increasing popularityoftheproduct. Ifservice isrequired, The slide-outcooling chassis isuniqueto Magic-Pak V-Series unitsandisachief 2.2 SLIDE-OUTCOOLING CHASSIS This isflexibility you may not getfrom some central systems. the outdoor temperature. Acold day inJune, heating; ahotday inJanuary, cooling. Occupants canhave heating orairconditioning any timeoftheyear according to as important,itallows individualmetering andcontrol for eachunit. each individualsuite that isreliable, easy to install andinexpensive to maintain.Just Pak provides aducted, single-package, combination heating-and-cooling unitfor , withouttheexpense andcomplications ofsplit-system units.Magic- The Magic-Pak concept provides allthe practical benefitsofasplit system, plusa 2.1 TOTALLY PACKAGED HVAC SYSTEM PROVIDES INDIVIDUAL COMFORT CONTROL 2. MAGIC-PAK: DESIGNEDANDBUILT FOR requirements for thetypeofoccupancy. qualified Professional Engineer familiar withtheapplicablelocalbuilding code sizing, andelectrical-supplywiringshouldbedetermined for thebuildingby a Building structure heat loss andheat gain,ductsizing,gassupplymainsandriser Magic-Pak units. includes someofthemost successful andeconomical installation practices for This documentconveys someoftheexperience gainedover many decades,and DESIGNERS ANDBUILDERS outrefrigeration chassis. The system iscompletely factory-built, logy inheat transfer 3rd

the needfor achimney. uses onlyoutsideairfor combustion. This allows thebuilt-inpower vent to eliminate where gasisavailable. Magic-Pak isclassified asadirect vent application which Depending onenergy cost inyour area, gasheating could maximize applications HWC Heating, ElectricCooling -Gas chimney/vent pipe. local energy costs. Allare ducted, through-the ­ Magic-Pak offers a variety ofheat sources to best suitthegeographic area or 2.5 GAS ANDELECTRIC ALTERNATIVES 2 7 / 1 8 1/2 GasInlet Supply Supply 16 27-7/8 Return 22 23/4 1 1 / 2 2 18 1-3/4

: 43-3/16 1 / 4 F ig Box Line Voltage 8 Condensate 1. HWC9 Drain Only HWC V-Series Model Voltage Low -wall unitswhichhave noneedfor 1 1 Supply 13-3/8 8 2 6 Return 29 7 / 16

5 | V-SERIES™ APPLICATION GUIDE 6 | V-SERIES™ APPLICATION GUIDE milder geographies. andcooling isanalternative solutionwhengasisnotavailable, orin EWC -ElectricHeating 2 7 / 1 8 Supply Supply 16 Return 27-7/8 22 Fig 2.EWC V-Series Model 23/4 1 1 / 2 18 1 1-3/4 43-3/16 1 2 / 4 7 / 8 Box Line Voltage 8 Voltage Low 1 1 13-3/8 8 6 29 7 / 16 clearance of60”between units(see Fig.4). need to have aminimumhorizontal clearance of12”between unitsandavertical Buildings that are designedwiththeutility closetnext to eachother, orstacked, climates, thelocation ofaunitshould beconsidered dueto possible frost back-up. the designerconsult the application specialist aboutdesired alternatives. Incolder are notexact for every application, andotherconsiderations mightsuggest that recirculation ofcondenser air, orinteraction between units.However, thesenumbers These “rules-of-thumb”dimensionsare intended to minimize possibilities for increased by 20%. facing eachotherinwall, theseparation between opposite walls shouldbe buildings. Ifthree ormore adjacent walls form anairshaftwithMagic-Pak units Buildings tallerthansixstories neednotexceed theseparation neededfor six-story units, thebuildingsshouldbeat least 24 ft.apart. ft. from theopposite buildingwall, and ifthat buildingwall alsocontains Magic-Pak A six-story buildingwithsixMagic-Pak unitsinavertical array shouldbeat least 12 be at least 4ft.apart. facing theunit,andiffacing wall alsohasaMagic-Pak unit,thetwo walls should story buildingwithaMagic-Pak unitshouldbeaminimumof2ft.from thewall every floororMagic-Pak unitina vertical array facing the wall. For example, aone- A buildingwall shouldbenocloserto anopposite buildingwall thantwo feet for 3.1 GENERALCONSIDERATIONS Figure 3.Condominium withMagic-Pak onexterior wall 3. UNITLOCATION MAGIC-PAK discharge of condenser air. might impedethefree intake and is clearof obstructions which in anexterior buildingwall that Magic-Pak units shouldbeinstalled

7 | V-SERIES™ APPLICATION GUIDE 8 | V-SERIES™ APPLICATION GUIDE building. (from asoundstandpoint) asunitslocated intheouter perimeter walls ofa Units located inwalls forming anairshaftorconfined courtyard are notasdesirable reflecting surface asispractical. to locate Magic-Pak unitsinawall withas muchcleardistance to thenearest wall or not parallel, thesoundmay besomewhat dispersed,butingeneral itispreferable emanating from that unitcanbereflected by theopposite wall. Ifthetwo walls are It shouldbementionedthat any timeahard surface orwall faces aunit,thesound 3.2 SOUNDCONSIDERATIONS should bemaintainedinorder to minimize soundtransmission through thewindow. window, at least 6ft.ofseparation be­ Similarly, iftheunitisto beinstalled inawall at rightanglesto awall containing a Fig 4:BuildingClearance Needed tween theclosest pointofglass to theunit 1 1 / 2 minimum clearance required onlocating theunitto aninterior corner ofabuilding. obstructed withtrees, landscapematerials, orbuildingstructure (see Fig.4).There isno but shouldnotberecessed more than2”from theface ofthebuilding andshouldnotbe The grillesideoftheunitmay beflushwith,or extend beyond, the face of exterior wall, install directly oncarpeting,tile, orothercombustible material otherthanwood flooring. union andmanualshutoff valve as well asproviding accessibility for fieldwiring.Donot 2” top, and1”front oftheplenum.Adequate clearance must beprovided to install gas line surrounded by aclosetwithminimumclearances to combustible material heldto 0”sides, The designiscertified for indoorinstallation only. The interior portionsoftheunitmay be CodeNational FuelGas (NFPA 54/ANSI Z223.1), andlocalcodes. Vent location ofgas-fired Magic-Pak modelsmust comply withthelatest editionofthe 3.4 VENTLOCATION FOR GAS MODELS cleaning by theoccupants orby maintenance personnel. all possible; iffor nootherreason thanto keep theairfilter accessible for easy andtimely Units inarelatively inaccessible location for easy chassis removal shouldbeavoided ifat during removal andsubsequentreplacement ofachassis.) These are very usefulinclosequarters to provide aplatform to slidethechassis onto from vertical to horizontal withanelevating-adjustment feature andfour ­ (Note: There are specialdolliesavailable through wholesalersthat canleantheplatform closet wall. enough to permitslidingthechassis alltheway out before runninginto theopposite Also, iftheMagic-Pak isinstalled through thesideofacloset,besure theclosetiswide the chassis outof the closet. be removed first to remove thechassis, besure that theclosetdoorislarge enough to get If theunitislocated intheendofaclothescloset,anditisaccepted that theclothesmust on theunit(Fig5). a minimumto allow for sometolerance inlocating theaccess doorframe exactly centered remove thechassis. A36in.widedoororaccess covering to theenclosure ispreferred as removal. A30in.wideminimumclearopeningisneededin front oftheunitinorder to An importantconsideration whenselectingasuitablelocation isaccessibility for chassis 3.3 ACCESSIBILITY 1 1 2 / 4 7 / 8 Fig 5:Clearance neededfor Chassis. wheelsupport.

9 | V-SERIES™ APPLICATION GUIDE 10 | V-SERIES™ APPLICATION GUIDE approaches completion. off-site untilbuilding construction construction. Unitscanthenremain accurate openingduringbuilding of Magic-Pak unitsby providing an designed to facilitate theinstallation Magic-Pak units. The wall sleeve is “Wall sleeve” isanaccessory for the Fig 6:Wall sleeve frame the finished wall by 3/8 in. to 1in. The weather-seal caulkingiseasierto perform whenthesleeve protrudes beyond sleeve later to befilled by theMagic-Pak unit. buildings, weather sealingmay bedoneby access through theopeninginwall caulk sealedaround theoutsideperimeter at thebuildingwall. Inmulti-story Magic-Pak recommend that awall sleeve befastened into thewall openingand sealing. the wall sleeve openingprovides easy access to thefinished wall perimeter for caulk correctly sized to receive aMagic-Pak unit.When inplace andsecurely fastened, sides seefig7). These easilyslip together onthejob to form a rectangular box The wall sleeve iscomprised offour assemblies (top, bottom, andrightleft Fig 7:Wall sleeve assembly 4. WALL SLEEVES Right SidePanel Side supportangle Sleeve Front of Top Panel Squaring Braces Bottom Panel opening inunit with return air opening to Align 0” X22”Minimum Wall Sleeve Top SupportAngle Left SidePanel (bottom layer) Plywood 2 Vibration Isolating Material 1” or3 Fig 8:Wall sleeve dimensions Flanges may beassembled (Top Layer) 29 3/4 ” from front ofsleeve 45 2 12 1/2 16 outside angle1 Figure 9:Wall sleeve installed from The wall sleeve must befastened to thesupportingwall andnotto thefinished wall. by 3/8 in.to 1in.,asneededfor caulksealing. wall before thebrickisinstalled, thesleeve willprotrude beyond thefinishedbrick inserted into theblock-wall opening,upto theangles,andfastened to theblock added to thewidthofbrick(plus3/8 in.to 1in.)sothat whenthesleeve is usually aspace between theblockandbrick.This space dimensionmust be For example, ifthesupportingwall isconcrete blockwithabrickfacing, there is considered flashing. wall by therecommended 3/8 in.to 1in.dimension.Support anglesshouldnotbe wall sleeve sidesat alocation that willexceed thethickness oftheoutsidefinish support anglesfurnishedwiththewall-sleeve kitshouldthenbe attached to the from theoutsidewhilewall isbeingconstructed (Fig.11,12,13).The two-sided In many high-riseconstruction applications, contractors insertthewall sleeves (Figs. 9&10) perimeter oftheopeningfrom insidefor sealingbecomes increasingly difficult The sleeve may extend farther than1in.beyond thefinished wall, but reaching the 4.1 INSTALLATION angle 2 Figure 10:Wall sleeve from outside

11 | V-SERIES™ APPLICATION GUIDE 12 | V-SERIES™ APPLICATION GUIDE sides into backwall shot through wall sleeve Figure 13-Fasteners outside angle3 Figure 11-Wall sleeve installed from wall isapplied(SeeFig.19). weather sealappliedfrom theoutsideasfinish sleeve isfrom theinsideofbuildingwith The most popularmethodofinstalling thewall supporting wall (SeeFig.13). through thesidesofwall sleeve into the the appropriate dimensionwhileshootingfasteners side anglessimplyasalocating “stop” to achieve sleeve from theoutsideorinside. Otherswillusethe angles to thesupportwall whetherinsertingthe Some builderswillattach through thesidesupport Figure 12-Caulkaround sleeve enlarged andtapered-edge opening. Figure 14:Recessed wall sleeve with the condenser discharge air. dimension equalto orgreater thantheamountofrecess to avoid restriction of The top ofthewall openingshouldbeabove thetop ofthewall sleeve by a the sleeve. SeeFig.15. weather-seal caulkingalongthebottom edgewithoutpluggingthedrain holesin This sillshouldberecessed furtherthanthesleeve by 3/8 in.to 1in.to permit the wall opening,somerecessing ispermitted (Figs.13and14). so that thebottom canrest onasillthat isat least 2in.higherthanthebottom of However, ifthewall openingcanbelarger invertical dimensionthanthewall sleeve, wall sleeve ifthewall openingisrequired to bethesameaswall-sleeve opening. architectural designdictates, unitscanberecessed. Oneshouldavoid recessing the In someapplications, where buildingwalls are very thick(over 16in.)or 4.2 RECESSED SLEEVES enlarged andtapered-edge opening. Figure 15:Recessed wall sleeve with

13 | V-SERIES™ APPLICATION GUIDE 14 | V-SERIES™ APPLICATION GUIDE Further sealingagainst airinfiltration must bedoneafter theMagic-Pak unitis the wall opening,ifdesired, to avoid breaking thesealduringhandling(Fig.19). (Fig. 17).Remaining finalsealingcanbedonejust after thesleeve issecured into right after thewall sleeve isassembled butbefore itisplaced inthewall opening -Pak unitisinstalled inthesleeve. Caulksealingofthebottom isbest accomplished This sealingmust bedoneafter thewall sleeve isassembled, butbefore theMagic­ and spot-welded jointsare included. braces fastened insidethetop corners. Instructions for caulksealingtheslipjoints easily at thejobsite andare heldsquare (untilready to receive aMagic-Pak) by two Wall sleeves are packaged oneto acarton andare shippedflat. They snap together 4.3 WEATHER-PROOFING WALL SLEEVES all around withsealant. the clearance space between unitandwall sleeve duringperiodsof very highwinds,fill Figure 16-For additionalprotection against air sides withabeadofsealant. protection, thespace between theunitandwall sleeve shouldbesealedonall installed inthewall sleeve andutilityconnections are completed. For additional bottom). (Underside view ofwall sleeve inserting into wall opening joints ofwall sleeve before Figure 17-Caulksealoutside inserting into wall opening. joints ofwall sleeve before Figure 18-Caulksealoutside - possibility ofvibration transmitted into thewall andto otherpartsofthestructure. the desirability ofsupplementarysupportasdescribedabove, reducing the Even thoughthewall may beadequate to supporttheunit,experience hasshown minimize transmission ofvibration into thefloor(Figs.20and21). the adjustment pressure (Fig.21).Vibration­ separated by 3/4 in.pipeand“all-thread” rod, withnutsandwashers, to provide channels, 28in.long,oneplaced undertheunitandoneonfloor. They are A supplementarysupportcanbemadefor thispurpose. Itconsists oftwo steel evenly across thebottom oftheunitthrough adjustable legsto thefloor. support for theunitisdesirable, itshouldbenearthiscenter ofgravity andapplied the bottom return-air openingrear flangeandthe wall sleeve. When additional additional supportbetween theunitandfloor. The center of gravity isbetween however, must beadequate to supporttheunit.Otherwise, onemust provide In general, awall sleeves willsupportaMagic-Pak unitsonany wall. The wall, 5.1 SUPPORT 5. TYPESOFWALL CONSTRUCTION Figure 21:Condensate-tube installed Figure 19:Vibration Isolation Pad interfering withproper retention ofthefilter access cover (Fig.22). cabinet inthisarea isnotheavy enoughto actasasupportwithoutdistorting and collar are used.These shouldnotbeusedto supporttheunit.The sheetmetal tube to exit thereturn-air ductcavity whenever aclosedreturn ductandflexible of thereturn-air opening.These holesare intended to allow acondensate drain Two 1in.diameter holesare located nearthefront oftheMagic-Pak oneitherside isolation blocksare alsorequired to Figure 22:Condensate-tube installed unit withvibration padinplace Figure 20:Photo ofsupportunder

15 | V-SERIES™ APPLICATION GUIDE 16 | V-SERIES™ APPLICATION GUIDE bottom by too muchliftpressure from thejackscrews. against theunit alltheway from top to bottom andnotbeopenedupnearthe Also, thewall-sleeve-to-unit vertical gaskets ontheoutdoor sideshouldstill seat Some pressure shouldremain onthegasket to provide aweather seal. weather­ pads onthefloor, butnotsomuchthat theunitislifted completely offofthe the supplementarysupportsufficiently to transfer theunit weight tothevibration Lifting theweight oftheunitisachieved by turningthenutsonthreaded legsof vibration padslocated between thelower channelandthefloor(Fig.21). between theupperchannelandbottom oftheMagic-Pak, inadditionto four channels located nearthecenter ofgravity andisolated withfour vibration pads Further, asupplementarysupportshouldbeused,consisting oftransverse support sleeve before theMagic-Pak isinserted into thewall sleeve. recommended that vibration padsbeplaced inthebottom outsideedgeofthewall more easilyinto otherareas. Asaprecaution against thispossibility, itis sheathing canbeexcited by vibrating machineryandwilltransmit thevibration A lightweight wall withlittleornoinsulation, thininterior drywall, andexterior construction anditsrigidityisthecontrolling factor for vibration control. frequencies carriedfrom onefloor to another. However, the remainder ofthe wall and inmany casesare more effective than concrete walls in reducing vibration Most wood-frame stud walls are strong enoughto supporttheMagic-Pak unit, insulating sheathing. angles shouldseat against solidwood studs orplywood sheathing, notagainst soft If thewall sleeve isinserted from outside, thesameconcerns apply. The mounting under conditions ofprolonged pressure orvibration. up anddown, notagainst any drywall orsoftwall board whichmightdisintegrate sides ofthewall sleeve. However, theanglemust seat against solidwood alltheway lag screws inserted into thedouble2x4through theside mountinganglesonboth If thewall sleeve isinserted from theinside, theunitcanbeamplysupported by the opening(Fig.23). the bottom oftheopening,withat least onevertical supportunderthecenter of The framed openingshouldconsist ofdouble2x4or2x6onbothsidesandacross 5.2 WOOD-FRAME WALLS opening braced for wall sleeve attachment Figure 23:Line drawing offrame wall with sealgasket located between thewall­ sleeve bottom andtheunitbottom. 29-1/8” Width 45-1/8” Height the wall sleeve to finish vertical. held tightlyto theblockalongbothsideswhileshooting the fasteners inorder for block, usingthesideangles aspositionlocator. Itisimportantthat theanglesbe Many contractors prefer to shootfasteners through thesides ofthesleeves into the building andthischoice willdetermine thelocation ofthesideangles. local buildingcodes. The wall sleeves may beinstalled from insideor outsideofthe Wall sleeve openingsmust includeasuitablelintel across thetop asprescribed by vibration andnoisetransmission insingleormulti­ Cement-block orcinder-blockwalls have proved to bethemost forgiving for 5.3 CEMENTBLOCK WALLS document. For more information contact Application Specialist. If there isany conflict withwhat isadvised,localbuilding codes supersedethis insulation whencompleted. Pleasereference to localbuilding code andordinance. designer iscertain that thewood-frame wall willberigidandwell-packed with It isrecommended that theseprecautions against vibration beincludedunless the angle onthewall sleeve. top supportangleontheMagic-Pak andthecorresponding top turn down retaining Additional isolation canbeachieved by theuseofrubbergrommets between the caulk seal Figure 24 :Larger openingto allow Fig 26:Enlarged cross-sectional view caulk seal Figure 25:Larger openingto allow story buildings.

17 | V-SERIES™ APPLICATION GUIDE 18 | V-SERIES™ APPLICATION GUIDE the floor(Fig.28). (Fig. 27). Asupplementarysupportshouldbeincludedto isolate any vibration from bottom ofthewall sleeve before theMagic-Pak unitisinserted into thewall sleeve as well asfrom thefloor. Vibration elimination blocksshouldbeplaced insidethe building. Curingthesephenomenausuallymeansisolating theunitfrom thewall, noise phenomenacanoccur several floors away oronanopposite sideofthe to isolate vibration. When usedinconjunction withpre-stressed concrete floors, rise, multistory buildingconstruction. These buildingsrequire specialconsideration The useof‘’pre-cast” orpoured-concrete walls hasincreased considerably inhigh­ 5.4 POUREDCONCRETE WALLS thickness isnotexcessive (Fig.25). This canalsowork whenrecessing thesleeve, upto 2in.,even ifthetotal wall material. providing asuitablegroove between thesleeve andbrickinwhichto applycaulking the wall sleeve by 1/2 inchormore, slopingdownward to permitdrainage, whilestill bottom ischanged.The longdimensionisplaced at ananglestarting underneath opening thesamefor thewall sleeve; butthedirection ofthebrickplaced alongthe When theoutsidefacing isbrick,anotherapproach hasbeento keep theblock-wall means to caulksealacross thebottom withoutobstructing thedrain holes(Fig.25). permit theuseofarecessed sillonwhichwall sleeve canrest andstill provide a the vertical dimensionoftheopeningshouldbemadelarger by 1in.to 2in.to caulking across thebottom edgewithoutriskingpluggeddrain holes.Inthiscase, There­ The top supportingangleontheMagic-Pak is16in.from theoutsidegrilleface. are 12-1/2 in.for 8in.block,plus4brickfacing. Either 8in.or12blockwillaccommodate thewall sleeve. The wall-sleeve sides caulk sealantalongbottom edge Figure 27: Vibration blocksasastop for fore; 12in.blockplus4brickwould notpermitenoughprotrusion to permit bottom ofthewall Figure 28:Vibration blocksinsidethe

6. NOISETRANSMISSION drivers (Fig.29). studding just asfor wood, except that self-drillingscrews are usedwithpower with extensive useofadhesives. Magic-Pak wall sleeves are attached to thesteel exterior walls, covered witharigidsheathing andthick,rigidinsulation panels Some typesofconstruction involve theuseofsteel 2in.x4channelstuds in 5.5 METAL STUDS In general, theperception ofnoise canbetraced to: adjacent to theMagic-Pak units. worlds, there are otherways to reduce thenoiseperception inoccupied rooms concerns canbebetter served. Ifthefloorplandoesnotpermitbest ofboth to abedroom orliving­ plan. The unitcanalsobeautility-room, kitchen orbalcony location, asopposed For ductlayout andairdistribution, itisbetter to locate aunitcentrally inthefloor 4. 3. 2. 1. Resonant surfaces andobjects Air noise panels andenclosure walls Sound radiating from thesource (compressor andmotors) through the Vibration transmission room location, thenbothductwork andsound-transmission sides ofwall sleeve. fasteners shotthrough 4” studs withscrews fastened to steel 2”x Figure: 29:Wall sleeve

19 | V-SERIES™ APPLICATION GUIDE 20 | V-SERIES™ APPLICATION GUIDE adverse contributing factors. early planningcanaddress many occupants can beelusive, and Noise perception by building wall whichsupportstheunit withouttransmitting theenergy furtherorexciting Magic-Pak unitisnoexception. Iftheremaining vibration canbeabsorbedby the mufflers, there isalways somevibration created by moving machinery, anda In spite oftheefforts ofrubbermounting,balancing,flexible loopsoftubingand 6.1 VIBRATION TRANSMISSION adjoining space ifconstructed withthispurposeinmind. source. Aclosetenclosure for theMagic­ Factors that affect thisproperty includethickness, densityanddistance from the Some typesofmaterials are more “trans­ frequencies. that eitherreflect, absorbortransmit (usuallya combination ofallthree) certain These soundsources thenradiate to enclosingpanels,whichare madeofmaterials excited to vibrate andfurtherimposethesoundonanotherarea. from thesesources ofsound.Ifthisisthecase, theseobjects orsurfaces canbe objects orsurfaces whichmightinturnbe resonant withsomeofthefrequencies sound. Frequently thesesources ofsoundcantransfer certain frequencies to other blower andthecondenser bladeuponairare additionalsources ofradiated Sound frequencies generated by theactionofbladescirculating air unit. the gasare asubstantial contributor to thetotal soundradiated by the problem. The soundfrequencies generated by themotor/compressor actingupon imperceptible inanormaloperating unitanddoesnotcontribute to any sound be heard from thesesources orthecontrol transformer, butgenerally thisis incorporating airwhenmoving blades.A60HzAC power humcansometimes In general, thesources ofsoundare thecompressor andtherotating motors 6.2 RADIATED SOUNDANDRESONANTSURFACES OROBJECTS touch, theunit. and any sheetmetalducts.Also, theductsmust notbesupported by, orotherwise Flexible ductcollars must beusedbetween theMagic-Pak plenumductflanges radiate vibration thanare sparselyinsulated (or un-insulated walls). are heavily packed withfiberglass batt insulation or rock wool are less likely to re- vibration unless adequately dampenedby othermaterials. Wood stud walls which walls. Wood stud wall construction canbemore easilyexcited to re-radiate Concrete blockwalls have proved to absorbvibration better thanpoured-concrete sleeve. floor (Figs.21, 27 and 28),as well asbetween theunitandbottom ofthe wall additional vibration isolation usingvibration padsbetween supportstands andthe an adjacent structural member, there isnoproblem. Otherwise, itisrecommended -Pak unitcanreduce thesoundlevel inthe parent” to somefrequencies thanothers. layers ofgypsumdrywall appliedto sidewalls andceiling. Figure 30:Line-drawing elevation cross sectionofclosetenclosure showing two (2) edges oftheplates on16in.centers. This forms anominal6in.partitionwall instead studs are fastened to 2in.x6top andbottom plates andstaggered to opposite The sidewalls canfurtherbeimproved for soundtransmission ifthe 2in.x4 (Magic-Pak unit side) ofthewalls andthefront access doorofthecloset(Fig.30). by usingtwo layers ofgypsum drywall (5/8 in.or1/2 in.minimum)ontheinside to thefront access doorofthecloset.Additional soundattenuation canbeachieved minimum dimensionof4in.to theinsidewall surface is preferred. This appliesalso concerned. However, ifsound trans­ The Magic-Pak cabinetisapproved for zero clearances, asfar assafety codes are 6.3 CLEARANCES increased to more than3in. without two thicknesses ofgypsumwall board, unless thefiberglass thick­ ever, thefiberglass orpolystyrene alonewillnotprove effective atthese frequencies if thermalinsulation andavapor barrierisappropriate inthe buildingdesign.How Fiberglass orrigidpolystyrene insulation may beappliedbetween thefurringstrips wall surface by meansoffurringstrips andstructural adhesive (and/or nails). further improved by addingtwo layers ofgypsumwall board fastened to theinside minimum thickness of4in.blockto attenuate radiated sound.The effectiveness is for thesidewalls oftheclosetenclosure hasbeenemployed successfully usinga return-air space, where localbuildingcodes permit.Cement-block construction This sametypeofstaggered stud wall construction may effectively beusedas pound densityfiberglass (Fig.31). between thetwo wall surfaces may thenbefilledwith2-1/2 in.minimum,1-1/2 to befastened to studs withoutbeingtiedtogether to thesamestud. The space of theusual4in.wall, andpermitstheinsidewall board andoutsidewall board mission through awall isofmajorconcern, a ness is ­

21 | V-SERIES™ APPLICATION GUIDE 22 | V-SERIES™ APPLICATION GUIDE studs staggered onwidetop and bottom plate for lateral airpassage Figure 31:linedrawings, planandelevation showing cross sectionof walls with2”x4” Sound Level (dBa), Noise Criteria (NC)Curves orRoom Criteria (RC)Curves. Some localbuildingcodes have indoorrequirements stated interms ofA-Weighted various methodsfor changingtheselevels. standard 275 allows oneto predict soundlevels at various locations, anditprovides landscaping elementsandbuildingorientations canstill beadjusted. The AHRI ordinances andlocalcode requirements duringdesignandplanningstages, when the soundratings. This serves avery usefulpurposewhendealingwithsound The most recent version oftheAHRIstandard 275 describeshow to apply the courtyard. outdoors anddistant from theunit,suchasaproperty line oranapartmentacross are onlyusefulinworking withsoundlevels andmeasurements at locations of theindoorspace served by theunit.These soundrating numbers (indecibels) standard 270 have littleornothingto dowiththeperceived soundcharacteristics by manufacturers ofunitaryequipmentunderthemost recent version oftheAHRI The soundrating numberswhichare listed intheAHRIDirectory andare certified 6.4 DETERMINATION OFSOUNDRATING VALUES successfully. the grillelocation uporsideways ina6in.closetsidewall isonemethodused enclosure orthereturn ductopeninginthebottom oftheMagic-Pak unitoffsetting If onlyonereturn-air to grilleisused, itshouldnotbein‘line of sight’ thecloset later. returning to theMagic-Pak unitandpresents additional disadvantages discussed This practice alsofrequently utilizes theclosetspace asareturn plenumfor air device (i.e. wood ) isinstalled. any othergas-fueledappliance (i.e. water heater), orcarbonmonoxide-producing outside thecloset.Return airmust notbedrawn from aroom where thisfurnace, or Return airduct work isrequired for thegas/electric units.Itneedsto terminate noise intheclosetcanescapethrough thereturn grilleunimpeded(SeeFig.32). unit. This is issimplycutinto thesideordoorofclosetenclosingMagic-Pak More frequently, airnoiseinvolves thereturn-air system (or lackofit)whenareturn 6.5.2. RETURN-AIR DUCTSYSTEM air frictionat therequired airflow for eachsupply register. manufacturer usuallyincludesvalues for noisealongwithface velocity, throw and perception ofsoundfrom airnoise. The selectiontablesfurnished by theregister The face velocity ofairoutthesupplyregister willultimately determine the one turnofdirection isneededto attenuate thenoiseinductorplenum. short ductisnotrecommended. At least 4ft.ofinsideinsulated ductand/or at least A supplyregister cutinto thesideofsupplyplenumorat theendofavery same where localcodes willpermit. As well, theuseofnoless than1in.thickfiberglass ductboard willaccomplish the of insulation andsoundreduction willhave beenachieved. insulation isappliedto theinsideof the ductwork whenitismade, thedualpurpose condensation formation ontheoutsideofductduringsummeroperation. Ifthe Supply ductsandtheplenumonMagic-Pak unitshouldbeinsulated to prevent room. any airnoisewillusuallybeheard at thesupplyregisters orreturn-air grilleinthe machinery. Since Magic-Pak unitsare usuallyconnected to ductsfor airdistribution, of amuchdifferent character thanthevibration and radiated soundsofmoving airvelocity, airturningcorners, changesinductsize, etc., canallcreate sound 6.5.1. SUPPLY-AIR DUCTSYSTEM 6.5 AIRNOISE not recommended, since any equipmentoperating noiseorairvelocity

23 | V-SERIES™ APPLICATION GUIDE 24 | V-SERIES™ APPLICATION GUIDE unit supportat bottom should beavoided. Alsonote lackof sore to escapeinto livingarea and opening into equipmentroom allows Fig. 32:Return grille withdirect “roll ofinfiltration out” airduringhigh-wind conditions (Fig.33). from the bottom of the unit. This high wall location has the advantage of minimizing can beplaced ontheinsideclosetwalls anddoorto effectively reduce theairnoise grille shouldbelocated highonthe wall, rather thanat floorlevel. Then ductliner air grilleislocated inoneoftheenclosing walls directly adjacent to theunit, If theclosetenclosingMagic-Pak isusedasareturn-air plenumandthereturn- facing thereturn grille. liner to theairpassages thuscreated, andto theinsidesurface oftheopposite wall Additional air-noiseattenuation canbeaccomplished by adding1/2 in.thickduct closed return duct. from ductwork, withflexible collars and Figure 33-Linedrawing ofunitisolated the gasket jointbeneath thechassis baseinthereturn-air compartment. The design chassis baseandcantake another2in.ofwater depthalong thesidesand1in.to units inthesamewall directly above. The cabinetbasetakes the overflow from the water runningdown thebuildingwall above itplusthewater draining outofany If theMagic-Pak unitisrecessed into thewall opening,itwillalsolikely receive the about 1in.high. condenser coil face andtheupperdischarge condenser airlouvers, anditssidesare the sheetmetaljoints.The chassis basetakes thefirst water entering through the amount ofover­ fill faster thanthey candrain. The amount ofwindpressure willdetermine the of water received duringthat timedetermines whetherornotthebasepanswill water through theappropriate drainage paths. The lengthoftimeandtheamount During periodsofrain, anairconditioner must adequately channellarge amountsof contains, andchannelsoff, the water to theoutside. Instead ofrelying heavily onsealsandgaskets to keep thewater outside, thedesign 7.1 WATER INFILTRATION 7. INFILTRATION conditioned space. around theaccess dooraswould anenclosure withanaccess dooropeninginto the If theclosetenclosure isonabalcony, itwould notneedto besealed orgasketed unit andwall sleeve. be considered asno(too low to measure) CFMairinfiltration through theMagic-Pak can beusedfor calculation purposes. Wind conditions below 30milesperhourcan infiltration canbeassumed to beminimal.An average of15-30 CFMofinfiltration For applications inhighwindareas, suchashighrisebuildings,theamountof also beincludedinthiscalculation. showing sealedcondensate tubeopening Figure 34:Insideofunitat return-air ductflange, or entering thereturn-air duct. sealed at installation to prevent any drops ofwater from leaving thebasechannels holes, andthefour corners oftheinside-cabinetreturn-air bottom frame must be it shouldoccur. However, theductflange corners, the condensate tubingpassage inside cabinetreturn-air bottom frame isdesignedto furtherretain thisleakage in pressure andmore water canbeforced through theimperfections. Even then,the During high-wind conditions, theoutsidepressure isgreater thantheindoor imperfection isreached by the water level, itcanfindits way insidethebuilding. be filledwith water faster thanitcanrunoutthedrain holes,andifasmallholeor If thequantityofwater isexcessive for ashortperiodoftime, thedrain panscan the water to runoutthedrain holes. generally thesameover theentire outsideface andshouldnotaffect theabilityof is suchthat alloftherain water drains to theoutsideby gravity. Wind pressure is flowed water that willbepushedpast thesealsandimperfections in itself, andthewall sleeve, must through theMagic-Pak unit enters thespace by infiltration The amountofoutsideairthat practice. in accordance withstandard heat loss/gain calculations space must beincludedinthe air entering theconditioned and oftheoutside Pak unitsfor bothsensible The loadaddedto theMagic- 7.2 AIRINFILTRATION different ways. are most effectively addressed in Air infiltration and water infiltration

25 | V-SERIES™ APPLICATION GUIDE 26 | V-SERIES™ APPLICATION GUIDE material (Figs.35). expanding foam polyurethane sealantinsulation orsomeothersuitablecaulking It ispreferable to sealthespace between theunitand thewall sleeve with 7.5 SEALINGWALL SLEEVE eliminated. and highwindpressure duringanoff cycle canbe reduced, butnotnecessarily coming down to thereturn location intheunit,effect ofleaky return ductwork If thereturn-air grilleishighinthesidewall oraccess doorandconnected by aduct wall sleeve. air leaks,iftheenclosingclosetcanbepressurized by highwindandanunsealed flexible duct collars, care shouldbetaken to sealallcracks, holes,andjointsagainst Whenever return ductsare connected directly to theinletofaMagic-Pak using 7.4 SEALINGRETURN-AIR DUCTS conditions inhigh-risebuildingsisvery unpredictable. pressure; however, controlling theamountofairentering theductunderhigh-wind This methodisparticularlyusefulinkeeping thespace underaslightpositive up withapiece ofscreening to prevent insectsfrom entering. A grilleisplaced over theopeninginoutsidewall. The grilleshouldbebacked to theoutsidewall from thereturn ductorplenumspace. the building.Inorder to comply, somebuilderswillinstall ashortductwithfixed brought into theconditioned space depending upontheoccupancy anduseof Some localbuildingcodes require that aspecificamountof ventilation are be 7.3 INTRODUCTIONOFVENTILATION AIR all around withpolyurethane foam sealant. the clearance space between unit andwall sleeve infiltration duringperiodsofvery highwinds,fill Fig 35: For additionalprotection against air likelihood ofcollect­ this debrisontheinaccessible sideofthecoil. Inbuildingsover three stories, the airborne debriscancollect, asopposedto a“blow through” designwhichdeposits coil, whichcanbemore easilycleanedfrom theoutsidewhere dirt,leaves andother The lower grillecovering thecondenser coil isontheintake sideofthecondenser space andactiontakingplace behindthelouvered grille. air, andto present abetter appearance by avoiding line-ofsightobservation ofthe away from theintake ofthecondenser coil below it,to minimize recirculation of The louvers inthisuppergrilleare turnedslightlyupward to direct discharge air Models have smallcutoutat fluepipe termination.) cooling capacity. The upperlouvered grilleisthesamefor allmodels.(Note: HWC9 The appearance from outsideisthesamefor allMagic-Pak modelsofany heating or 8.1 GRILLEANDLOUVER FURNISHEDONMAGIC-PAK 8. OUTSIDE DECORATIVE FACADES, GRILLES designs are suitable. can sometimesbeplaced over theoutsideofMagic-Pak units,butnotall toned, grillefinish complements any exterior wall. Inaddition,Architectural louvers cooling towers, andintegrate unobtrusively into thebuildingdesign.The neutral- Magic-Pak units eliminate theunsightlyappearance ofexternal condensers and 8.2 OUTSIDE APPEARANCEVARIATIONS purposely removed. removed, thelower grilleshouldstay inplace to keep theopeningcovered untilitis Also, thelower grilleisheldinplace by theinserted chassis. Even withthechassis can fall outward withoutconsiderable maneuvering effort. The upperlouver isheldinplace by thelower grilleand,asasafety feature, neither chassis. likewise beremoved. Simplyreverse theprocedure to replace thesepartsandthe (like closingawindow) into thespace formerly occupied by thelower grilleand holds theupperlouver inplace, theupperlouver cannow bepulledstraight down lower grilleandpullittoward you to completely remove it.Since thelower grille remove theslide-outchassis, andreaching in,holdonto thebottom edgeofthe or repair, they canberemoved from insidethebuilding. To remove thegrilles,first If itbecomes necessary to remove theupperandlower grillesfor painting,cleaning action ofrain andotherelementsordinarily willcleanaway any accumulation. Fig. 36:V-Series OR LOUVERS ing suchdebrisontheoutsideisvery muchreduced, andthe to consider. 3rd partylouver withMagic-Pak, there are afew things the lower condenser airintake. When usingacustom of airbetween theuppercondenser airdischarge and successful designs,problems resulted from recirculation showed some deterioration ofperformance. Intheleast obstacle to airflow placed neartheoutsidegrilles and longevity oftheMagic-Pak units.Almost every effect several different designs have ontheperformance Tests have beenruninthelaboratory to findoutwhat

27 | V-SERIES™ APPLICATION GUIDE 28 | V-SERIES™ APPLICATION GUIDE practice to usealouvered grillewhichhasallofthelouvers pointingdownward. has usuallyresulted insatisfactory performance. Itisstill notconsidered good sufficient free area for intake anddischarge condenser air, asspecifiedinFig.37, the condenser coil isvitalto prevention ofrecirculation. Beyond that, providing installed horizontally between thegrilleorfacade andtheunitat thetop edgeof Elimination ofarecirculation path by theuseofatightfittingclose-outbaffle Fig 37. Louver facade shown incross sectionand enlarged sectionwithdimensions. bottom ofthegrilleisopen,flashing would notbe required. If suchagrilleisheldaway from thebuildingandMagic-Pak suchthat the unit) andthegrilleframe ifthespace isaresult ofrecessing theunit. grille. Also, flashingmust beinstalled between thebottom ofthe wall sleeve (or horizontal bafflemust beused to prevent recirculation of condenserairbehindthe If theMagic-Pak unitandsuchagrilleare to beseparated by more than1in.,a ice builduponthegrille. must beextended andflushwiththenew louver. This will reduce thepossibility of grille must have anunobstructed openingfor fluegases to pass through. The age outthrough thelouvers (Fig.41). OnHWC models,afieldinstalled architectural condenser discharge air, and2in.to 4in.lower at thebottom to permitwater drain- as theunit,andpreferably 2in.to 4in.higherat thetop, for less impingement of The grillemust have afree air face dimension(insideitsframe) at least aslarge thin (1/8 in..maximum)andhave vertical mullionsto prevent vibration andnoise. can work satisfactorily against theoutsideofunit,iflouvers are flat and louvers pointingdownward, andare at nomore thana45°anglefrom horizontal, A grillewhichhastheuppersectionoflouvers pointingupward andthelower attempted. way. Agency Approvals canbecome void ifany modifications to theHWC unitis After leaving thefactory, theHWC unitventing system must notbealtered inany CAUTION: metallic, high-temperature fluepipematerial in3in.or4diameter. of aluminumorgalvanized steel; butabetter material choice would beanon- the fluetubeandpitched slightlydownward (away from theunit)may last ifmade A 3in.or4diameter duct/tube fastened to thedecorative grille, concentric with building orfloorsbelow. be permitted to drain behindafacade oraddedgrillecausingwater damageto the Blowing rain orsnow must drain freely from theunit.At thesametimeitmust not

29 | V-SERIES™ APPLICATION GUIDE 30 | V-SERIES™ APPLICATION GUIDE below guidelineswillresult inthewarranty beingvoid. operation andmaintaintheequipment’s factory warranty. Any deviation from the Outlined below isalist ofdesigncriteria that ifmet,willensure proper unit situations, custom louver solutionsare often developed. that require louvers to be“hidden”orhave avery specificlookanddesign.Inthose We know inmany casesdevelopers andarchitects may have localbuildingcodes unit willperform asintended. equipment andhave beenthrough performance andreliability testing to ensure the and approved architectural louvers. These louvers are designedspecificallyfor our For ourM-Series™andV-Series™ lineofequipment,Magic-Pak offers factory tested 8.3 CONSIDERATIONS FOR CUSTOM LOUVERS

4. 3. 5. 2. 1. 6.Factory louvers andwall sleeves are designedto shedexcess rain water and maintained. less thanthe area available from thefactory wall sleeve. pointed downward. The pitch ofthebladesisnotto exceed 45degrees. exhaust louver bladesare directed upandcondenser intake louver bladesare is required. not beobstructed by a3rd partylouver solution.Proper sealingandflashing condenser condensate overflow outofthebottom ofthelouver. This must The cross sectionarea for thecondenser airintake andexhaust must notbe For gas/electricunits: The divisionbetween condenser airintake andexhaust must always be 70% free area ontheface ofany louver isrequired. Louvers must maintaintheirbidirectional louver bladeswhere condenser d. b. a. a. a. c. to thebuildingorwall sleeve. there shouldbeaconcentric pipethat extends to thelouver andattaches the louver andnotobstructed inany way. necessary to have divisionpanelsbetween floorsaswell. taller at thetop andbottom thanourfactory louver. between theintake andexhaust, offer 70% free area, andbeat least 2” spaced at least 4”from thefactory louver, maintainatightdivisionpanel condensate. materials must withstand typicalfluetemperatures andexposure to As withany gasburning , flueexhaust is mildlyacidic;selected Flue pipeextensions shouldnotbeattached to theexisting fluepipe, but For condensing gasfurnaces, thefluepipemust beflushwiththeface of The fluepipemust meettheback ofthelouver on80%models. If unitsare inavertical array andcovered withacontinuous louver, itis If aunidirectional louver isdesired, itmust beusedwithourfactory louver, ii. i. i. i. 400 degrees onM-Series. 95% - standard 2”PVC may beutilized. Flue pipeextensions shouldnotexceed 36”. No farther than1.5”ofseparation. 80% -amaximumof300degrees onV-Series andamaximumof there isnoneedto remove thegrillesfrom theunitorto addabird screen to the Fig. 36provides asketch ofasuitablelouver. With thisparticularlouver design, removal ofthechassis. cabinet) whichmightinhibitremoval ofthechassis orcauseasealto bebroken in not attach anything to theslide-outchassis edge(where itprotrudes from theunit other provisions are madeto prevent water from entering thebuilding(Fig.37). Do The bottom oftheunitmust still beflashed to thebottom edgeofthelouver, unless above thetop edgeofthecondenser coil. louver direction reverses from upto down) isinlinewitha2in.widespace just is more thantheheightofunitandcenter portionofthegrille(where the The Magic-Pak may belocated rightupto agrille, provided theheightofgrille unit any closerthanoneinch. HWC unit.Any extension fluetubemust not approach theuppergrilleofHWC itself orby somemeansotherthanattached to ortouching theuppergrilleof interpreted asbeingfastened to orheldinplace by thedecorative facade orlouver Therefore, any references here to thefluetube extensions orbafflesshouldbe reason ofrecirculation orrestriction ofcondenser air. passages and vertical assembly donotcontribute to performance deteriora the buildinganddoesnotdetract from thebuilding’s appearance. The large air from glass areas whichare inanadjacent wall. The grilleisoften painted to match large louvers placed vertically andmounted at anangleto deflectsound away Another typeofdecorative grillehasbeenusedto control sound.This grilleutilizes 8.4 CONTROL OFSOUNDWITHLOUVERED GRILLES satisfactory performance andservice life willresult. designer stays withintheguidelinesofrecommenda Not allhave beendocumented for performance once deterioration, butifthe throughout thecountry. and water drainage. These are examples ofafew ofthegrillesandfacades inuse louver. This louver extends above andbelow theunitto provide better airflow ­tions stated here, ­tion by

31 | V-SERIES™ APPLICATION GUIDE 32 | V-SERIES™ APPLICATION GUIDE Fig 38b. Installed Condensate Drain 9.1 CONDENSATE DRAIN 9. CONDENSATE port for thefurnace inadditionto theairconditioning condensate drain port. codes. The Magic-Pak HWC9 highefficiency unithasanadditional condensate drain O.D. copper tubing(or PVC tubing)andconnected to adrain according to local pan. The cleartubingisloopedto form atrap, thenslippedover apiece of518in. provided (see Fig38).Oneendslipstightlyover thestub-tube connection onthe A lengthofclearplastic tubingwithaheavy wall thickness (to prevent kinking) is center ofthepandirectly below theairfilter. condensate. The connection to thecondensate collection panislocated inthe provide many years oftrouble free service. Provision must bemadeto accept the Piping thecondensate to aninsidedrain isconsistent andreliable andshould second trap may result inslow orpossibly nodraining ofthefurnace condensate. not suggested or required to have a second trap added to the fieldinstalled drain. A The HWC9 Magic-Pak unitshave afactory installed condensate furnace drain. Itis 9.2 HIGHEFFICIENCY UNITS neutralizer, itisavailable asanaccessory. low andharmless to theenvironment. SeeFig39. IfLocal codes require anacid concentration level oftheacidityallthesefluidsincluding condensate is very furnace, includingMagic-Pak 90%+gas/electric units.The the relative pHofsomecommon liquidsto furnace condensate ofany 90%+gas 2 to 5range onthepHscaleofacidityandalkalinity. Figure 1below compares The condensate range ofhighefficiency ismildlyacidicand fallsinthe Units that runat 90%andabove efficiency produce a condensate that isnotpotent. Magic-Pak Units Gas/Electric Fig 39. Condensate pHRangeforFurnaces 90%+Gas and90%+

33 | V-SERIES™ APPLICATION GUIDE 34 | V-SERIES™ APPLICATION GUIDE the agenciesof localjurisdiction. defer to thecode requirements of specific unitmodel.Allinstructions supply wiringconnections to the describe theoptionsfor electrical with installation instructions which Each Magic-Pak modelisshipped Example: size canbeselected to meetaheating requirement at any chosenvoltage. be deter­ voltage ratio; soiftheexpected operating voltage at ajoblocation isknown orcan The actualBTUH outputoftheelectricstrip heaters varies withthesquare ofthe voltage range from 253 to 197 volts, inaccordance withtheAHRIStandard 210/240. The remainder oftheMagic-Pak unitisrated at 230volts, buthasanoperating volt rating. The “rated” voltage oftheheaters is208/230 volts. The nominalKW isfor a240- on theheating outputofthestrip heaters. Resistance strip heaters intheheating cycle, thesupplylinevoltage hasabearing above. However, since theEWC heat pumpmodelcontains electricresistance. affected onthe cooling cycle inamannersimilar to theHWC models,asdescribed 208 volt operation. heating ratings Gas are notaffected. The EWC electricunits volts willalways beavailable. Cooling capacitieswillbereduced by about1%for volt power ifassurances canbegiven by thepower supplierthat aminimumof197 208/230 volt, 60Hz,single-phasepower. The sameunitscanbeconnected to 208 In most cases,theHWC gas-fired Magic-Pak unitswillbe connected to nominal single­ to determine wire sizes, inadditionto theminimumfusesize requirements for both The specification sheets for eachmodelalsoincludetheampacity values required way. The heat outputfor any otherapplication voltage may bedetermined inthesame 10. ELECTRICALSERVICE WIRING • • entryandmultipleconnections to theunits. At 208volts, thesameheater delivers At 240 volts, 9.2 KW delivers 31,400BTUH mined, theactualheater outputcanbedetermined, oraheater optional ( ) 240 208 2 x9.2 =6.9KW or23,550BTUH contact oursupport team. protection isprovided. Ifadecorative grilleorfacade iscontem­ but intheevent that erratic windconditions could blow themback,thecorrosion high enoughto project thegasesbeyond thelouvered grillebefore they condense, externally onthelouvered grille. The flue-gas velocity and temperature are usually of moisture andtheformation ofacidsthrough conden ­ requirements for corrosion resistance for theapplication, andconsider thepresence blower, fluegasdischarge tubeandoutsidelouver grilleare consistent withthe The materials usedintheconstruction oftheheat exchanger, combustion drawing inthecorrect amountofairfor efficient combustion. required to overcome theinternal resis A centrifugal combustion-air blower provides thedisplacement andpressure combustion isaffected very little by highwindpressure. physically to benearlyat thesamepressure undervarious windconditions, proximity to theflue-gasdischarge tube. Since thetwo openingsare closeenough Gas-fired Magic-Pak’s take combustion airdirectly from theoutsideinclose 11. AIRFILTER 12. SPECIALCONSIDERATION FOR GAS UNITS excess of 0.12 in.W.G. selected for aface velocity notto exceed 300ft.perminute, oranairfrictionnotin The external filter grille (or grilles,ifmore thanoneis to beused)should the airentering thecooling coil must befiltered. Access for removal ofthecooling chassis must notbecompromised; however, allof return connection to theunitmust beused. system shouldbetightfrom thefilter to the coil inthechassis, andaclosedduct- in thereturn system, thefilter inthechassis shouldbe removed. The return-air duct In theevent that awall orceiling register containing anairfilter isselected for use cleaning by removal ofthelower front compartment cover. indoor coil intheslide-outchassis. This airfilter isaccessible for replacement or All Magic-Pak unitsare equippedwithanairfilter covering theentering face ofthe ­tance oftheheat-exchanger passages, while sation internally and plated, please taken from theoccupied space. units isthat combustion airisnot One of theadvantages of Magic­ Pak

35 | V-SERIES™ APPLICATION GUIDE Form No. MPVSAGM-400 (02/20) ©2020 Allied Air Enterprises LLC, a Lennox International Inc. Company Printed in U.S.A.