Trane TRG-TRC007-EN Bedienungsanleitung

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Der Grund dafür ist die fehlende Zeit und die Sicherheit, was die bestimmten Funktionen der gekauften Geräte angeht. Leider ist das Anschließen und Starten von Trane TRG-TRC007-EN zu wenig. Eine Anleitung beinhaltet eine Reihe von Hinweisen bezüglich bestimmter Funktionen, Sicherheitsgrundsätze, Wartungsarten (sogar das, welche Mittel man benutzen sollte), eventueller Fehler von Trane TRG-TRC007-EN und Lösungsarten für Probleme, die während der Nutzung auftreten könnten. Immerhin kann man in der Gebrauchsanleitung die Kontaktnummer zum Service Trane finden, wenn die vorgeschlagenen Lösungen nicht wirksam sind. Aktuell erfreuen sich Anleitungen in Form von interessanten Animationen oder Videoanleitungen an Popularität, die den Nutzer besser ansprechen als eine Broschüre. Diese Art von Anleitung gibt garantiert, dass der Nutzer sich das ganze Video anschaut, ohne die spezifizierten und komplizierten technischen Beschreibungen von Trane TRG-TRC007-EN zu überspringen, wie es bei der Papierform passiert.

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Inhaltsverzeichnis der Gebrauchsanleitungen

  • Seite 1

    Air Conditioning Clinic F undamentals of HV A C A coustics One of the Fu ndamen tal Ser ie s TR G-TRC007 -EN[...]

  • Seite 2

    NO POST AGE NECESSARY IF MAILED IN THE UNITED ST A TES BUSINESS REPL Y MAIL FIRST -CLASS MAIL PERMIT NO. 1 1 LA CROSSE, WI POST AGE WILL BE P AID BY ADDRESSEE TRANE Attn: Applications Engineering 3600 Pammel Creek Road La Crosse WI 54601-9985 NO POST AGE NECESSARY IF MAILED IN THE UNITED ST A TES BUSINESS REPL Y MAIL FIRST -CLASS MAIL PERMIT NO. 1 [...]

  • Seite 3

    P erforation 5.5” from bottom/top P erforation 0.75” from edge Response Car d W e of f er a variety of HV A C-related educational materials and tec hnical ref erences, as well as sof tware tools that simplify system design/analy sis and equipment selection. T o receiv e information about any of these items, just complete this postage-paid card [...]

  • Seite 4

    F undamentals of HV A C A coustics One of the Fu ndamen tal Ser ies A publication of T rane, an American Standard Compan y F undamentals of HV A C[...]

  • Seite 5

    Pr ef ace © 20 01 American Sta ndard In c. All ri ghts reser ved TRG-TRC007 -EN ii T rane belie ves that it is incu mbent on man ufacturers to se rve the indus try by regularly dis seminating informatio n gathe red through laboratory rese arc h, testing prog r ams, and fie ld experience. The T r ane Ai r Conditionin g Clinic se ries is one means o[...]

  • Seite 6

    TRG-TR C0 07-EN iii Cont ents period one Fundamentals of Sound .......... ...... ...... ...... ...... ... 1 What is S ound? ......... ...... ...... ....... ...... ......... ...... ...... 2 Octave B ands ........... ...... ......... ....... ...... ...... ......... ... 6 Sound Pow er and S ound Pressure ... ......... ...... ...... ... 9 period two So[...]

  • Seite 7

    iv TRG-TRC007 -EN[...]

  • Seite 8

    TRG-TR C0 07-EN 1 note s period on e F undamentals of Sound P eople have become increasing ly conscious of a coustics as a comp onent of a comfor table environ ment. Sound levels, both indoor and ou tdoor , can be aff ected to varying degre es by HV A C equipment and systems. The degree to whic h the HV AC system affe cts the s ound at a par ticula[...]

  • Seite 9

    2 TRG-TRC007 -EN note s peri od one F undamentals of Sound What is S ound? S ound is the aud ible emissi ons resulting from the vibration of mol ecules within an elastic me dium. It is g enerated by either a vi brating surfac e or the move ment of a fluid. In the c ontext of bui lding HV AC s ystems, this elastic medium can be either air or the bui[...]

  • Seite 10

    TRG-TR C0 07-EN 3 peri od o ne F undamentals of Sound note s Airborne soun d is transm it ted aw ay from a vibrating body through th e transfer of energ y from one air molec ule to the nex t. The vibratin g body a lternately compre sses and rar efies (expands) the air molecule s. T he press ure flu ctuations that result f rom the dis placement of t[...]

  • Seite 11

    4 TRG-TRC007 -EN note s peri od one F undamentals of Sound The w aveleng th of the sound is the linear measureme nt of one complete cycle. The w avelength a nd frequen cy of a sou nd are rela ted by usin g the following equation: The spee d of sound tra nsmission is a ph ysical proper ty of the medium . F or air , the spee d varies sli ghtly with t[...]

  • Seite 12

    TRG-TR C0 07-EN 5 peri od o ne F undamentals of Sound note s The w ave form s hown in Fig ure 5 represents soun d occur ring at a singl e frequency . This is calle d a pure tone . A pure sinusoidal wave form, however , is very rare in HV AC acous tics. T ypically , sounds a re of a broadband n ature, meaning that the sound is c omposed of several f[...]

  • Seite 13

    6 TRG-TRC007 -EN note s peri od one F undamentals of Sound Again , a pure tone has a s ingle frequen cy . If a so und in a nar row band of frequencie s is significantly greater than the sound at a djacent freque ncies, it would be similar to a to ne. T ones that st and out enoug h from the bac kground sound ca n be objec tionable. Man y of the soun[...]

  • Seite 14

    TRG-TR C0 07-EN 7 peri od o ne F undamentals of Sound note s Octave bands com press the range of frequencies be tween the upper and lo wer ends of th e band into a single value. S ound measured in a n octave ba nd is the loga rithmic sum of the so und level at eac h of the freque ncies within the ba nd. Unfor tunately , octave band s do not indicat[...]

  • Seite 15

    8 TRG-TRC007 -EN note s peri od one F undamentals of Sound Middle groun d between octave-b and ana lysis and full-spectrum analysis is provide d by one-third octave-band analys is. One-third octav e bands divide the full oc taves into th irds. The upper cutof f frequency of ea c h third octave is greater than the lower cutof f frequency by a factor[...]

  • Seite 16

    TRG-TR C0 07-EN 9 peri od o ne F undamentals of Sound note s S ound P ow er and Soun d P ressur e S ound power a nd sound press ure are two dis tinct and comm only confused c haracteristics o f sound. Both are genera lly described us ing the term d ecibel (dB), an d the term “so und level” is commonly substitute d for eac h. T o understand ho w[...]

  • Seite 17

    10 TRG-TRC007 -EN note s peri od one F undamentals of Sound The foll owing compariso n of sound a nd light may help illu strate the d istinction between these two proper ties. Think of sou nd power as the wat tage rating o f a light bu lb. Both mea sure a fixed amount of energ y . Wh ether you put a 1 0 0-w att light bulb o utdoor s or in a cl oset[...]

  • Seite 18

    TRG-TR C0 07-EN 11 peri od o ne F undamentals of Sound note s S ounds enc ompass a w ide range o f vol umes, or levels. Th e loudest s ound the human ear c an hear wi thout damage due to prol onged exposure is a bout 1,0 0 0,0 0 0,0 0 0 t imes greater than th e quietest perceptible sound. A range o f this magnit ude makes using an arithmetic scal e[...]

  • Seite 19

    12 TRG-TRC007 -EN note s peri od one F undamentals of Sound A logarithm is the exponent power of the base. In this case, the base is ten. For example, the log 10 of 1 0 (or 1 0 1 ) equals 1, the lo g 10 of 1 0 0 (or 1 0 2 ) equ als 2, and the log 10 o f 1, 000 , 000 , 000 ( o r 1 0 9 ) equa ls 9. As mentione d earlier , the loudest sou nd the human[...]

  • Seite 20

    TRG-TR C0 07-EN 13 peri od o ne F undamentals of Sound note s When a refere nce value is established an d placed in the denominator of the ratio, the dB can be calculated for any value e ntered into the numerator . The referenc e value us ed for calc ulating sound -power leve l is 1 pico wat t (pW), or 1 0 -12 wat ts. Therefore, so und-power lev el[...]

  • Seite 21

    14 TRG-TRC007 -EN note s peri od one F undamentals of Sound Again , these reference values can be considered the threshold of hearing. The multiplier 20 is used in the sound-pressure level e quation instead of 1 0 becaus e sound pow er is propor tional to the squ are of sound press ure. Measuring sound u sing a log arithmic scale mea ns that d ecib[...]

  • Seite 22

    TRG-TR C0 07-EN 15 note s The study of acoustic s is af fected by the re sponse of the human ear to s ound pressure. Unlike electronic s ound-measu r ing equip ment, wh ic h provides a repeatable , unbiased a nalysis of so und pressure , the sensi tivity of the human ear va ries by fre quency an d magnitu de. Our ears are also at tac hed to a high [...]

  • Seite 23

    16 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods The s ensation of loudness is principally a function of sound pres sure, h owever , it also de pends upon frequency . As a selec ti ve sensory o rga n, the human ear is more s ensitive to high freq uencies th an to low frequ encies. Also, the ear ’ s sensitivity at a par[...]

  • Seite 24

    TRG-TR C0 07-EN 17 peri od t w o Sound P erc eption and Rating Methods note s Additionally , tones evo ke a partic ularly strong response. R ecall that a ton e is a sound th at occur s at a s ingle frequenc y . Chalk sque aking on a blac kboard, for example , produces a tone that is extremel y ir ritating to ma ny peo ple. Single-Number Rati ng Met[...]

  • Seite 25

    18 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods shal l be X ,” where X is a sing le-number des criptor co nvey ing the desi red quality of s ound. The most fr equently used singl e-number des criptors are the A-weig hting network, n oise criteria (NC), and room criteria (R C). All three sha re a common problem, how ev[...]

  • Seite 26

    TRG-TR C0 07-EN 19 peri od t w o Sound P erc eption and Rating Methods note s The follow ing step s describe how to ca lculate an A-w eighted va lue. 1 Star ting with the actual soun d-pressure levels for the eight octa ve bands, add or subt ract the d ecibel val ues represen ted by the A-w eighting curve shown in Figure 23. T hese weig hting facto[...]

  • Seite 27

    20 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods A-weighting is of ten used to define s ound in o utdoor en vironments. For example, local sound ordinances typically regulate dBA levels at property line s. Hearing-relate d safety st andards, writ ten by org anizations suc h as the Occupational Safety and Heal th Administ[...]

  • Seite 28

    TRG-TR C0 07-EN 21 peri od t w o Sound P erc eption and Rating Methods note s Noise criteria (NC) curve s are prob ably the most c ommon singl e-number descriptor u sed to rate s ound-pressu re level s in indoor en vironments. Like the equal-loudn ess contours on whic h they are based, the loudness along eac h NC curve is about the sa me. Eac h NC [...]

  • Seite 29

    22 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods The follow ing step s describe how to calcu late an NC rating. 1 Plot the oc tave-band s ound-pressure levels on the NC c har t. 2 The highest curve crossed by the plotted data determ ines the NC rating. Although the N C curves are popula r and easy to use, they do have a [...]

  • Seite 30

    TRG-TR C0 07-EN 23 peri od t w o Sound P erc eption and Rating Methods note s Room criteria (RC) curves are s imilar to NC c urves in tha t they are used to provide a rating for sound-press ure levels in i ndoor environ ments. The m ajor dif ference is that RC curv es give an additio nal indicati on of sound c haracter . As discussed i n the previo[...]

  • Seite 31

    24 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods The follow ing step s describe how to determine an RC rating. 1 Plot the oc tave-band s ound-pressure levels on the RC c hart. 2 Determine the SIL by calc ulating the a rithmetic ave rage of the s ound- pressure l evels in the 50 0 Hz, 1,0 0 0 Hz, an d 2,0 0 0 Hz octave ba[...]

  • Seite 32

    TRG-TR C0 07-EN 25 peri od t w o Sound P erc eption and Rating Methods note s n P erceptible v ibration (R V): The sound level in the octave ban ds between 16 Hz a nd 63 Hz fa lls in the s haded regions ( A and B ). These reg ions indica te sound-pressure le vels at wh ic h walls and ceilings can vibrate perceptibly—ra ttling cabinet doors, pictu[...]

  • Seite 33

    26 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods If we plot the acoustical dat a for our example of fice sp ace on the RC cha rt, we find that it re sults i n a rating of RC-3 1(R). The SIL is 31 and the sound-p ressure levels i n the 63 Hz and 1 2 5 Hz oc tave ban ds are abo ve line D , indic ating a rumble c haracte ri[...]

  • Seite 34

    TRG-TR C0 07-EN 27 peri od t w o Sound P erc eption and Rating Methods note s The phon is another descriptor used to indicate loudness with a single number . The loudne ss of a sound, ex pressed in p hons, is e qual to the s ound- pressu re level of a standard sound, at 1 ,0 0 0 Hz, that is co nsidered eq ually loud. F or example, a sound pressure [...]

  • Seite 35

    28 TRG-TRC007 -EN note s peri od t w o Sound P erc eption and Rating Methods Octav e-Band Rating Method A more usefu l method of rati ng sound lev el is to use the octav e bands discuss ed earl ier . While oct ave-band dat a is not as simple to interpret as a single-num ber rating, it provide s muc h more information about the c haracter of the sou[...]

  • Seite 36

    TRG-TR C0 07-EN 29 note s period thr ee A coustical Analysis The primary acoustical desig n goal for an HV AC sy stem is to ac hieve a bac kground noise level that is q uiet enough s o that it does not inte rfere with the activity requi rements of the space an d is not obtrusive in sound quality . What is c onsidered “a cceptable ” varies dram [...]

  • Seite 37

    30 TRG-TRC007 -EN note s period thre e A coustical Analysis Set ti ng a Desi gn Goal The first ste p of an acou stical des ign is to qua ntify the goa l. P eriod T wo introduced sev eral single- number descriptors that designers commonly use to define th e acoustical design g oal for a space. Ea c h descriptor has its advan tages its and dr awbac k[...]

  • Seite 38

    TRG-TR C0 07-EN 31 period thre e A coustical Analysis note s When defini ng the acoustical des ign goal for an outdoor enviro nment, to mee t a local noise ordi nance for example, the A-weighted scale is typically used. This generally takes the form of a maxim um A-we ighted sound-pressure level a t the lot line of th e proper ty . More-sophis tica[...]

  • Seite 39

    32 TRG-TRC007 -EN note s period thre e A coustical Analysis S ource–P ath–Receiv er Analysis Ac hieving th e desire d acoustic al c haracteri stics in a space, h owever , r equires more than s electing an appropriate s ingle-number de scriptor . Includi ng a single-num ber descripto r in a HV AC system sp ecification means that someone must per[...]

  • Seite 40

    TRG-TR C0 07-EN 33 period thre e A coustical Analysis note s Pr edicting the sound l evel in a given s pace require s making a model o f the syste m. A source–path–receiver model pr ovides a systematic approac h to predict the acoustica l c haracteristics in a space. As the n ame sugges ts, this modeling m ethod traces sound from the source to [...]

  • Seite 41

    34 TRG-TRC007 -EN note s period thre e A coustical Analysis The w ork, a nd ar t, of an acoustical ana lysis is in identifying and quantifying the various pa ths that sou nd travels from the source to the receiver . There are primarily three dif ferent types of sound p aths. n Airborne: This is a path where soun d travels wi th, or ag ainst, the di[...]

  • Seite 42

    TRG-TR C0 07-EN 35 period thre e A coustical Analysis note s S ound can trav el between a single s ource and th e receiver along on e or multiple pa ths. In the case of an air -cooled c hiller sit ting on the roof of a building, and a re ceiver locate d acros s a park ing lot at the ed ge of the proper ty , sound trave ls along on ly one p ath. Ano[...]

  • Seite 43

    36 TRG-TRC007 -EN note s period thre e A coustical Analysis 1 Supply airbo r ne through th e supply du ctwork and diffus ers and into the spac e 2 Supply break out as the sound travels through t he walls of th e supply ductwork , through the c eiling tile, a nd into the sp ace 3 R eturn airborne thro ugh the air -handler intake, return ductw ork an[...]

  • Seite 44

    TRG-TR C0 07-EN 37 period thre e A coustical Analysis note s S ound- P ath Modeling When all the paths have been i dentified, the y can be individually mod eled to determine th e contribution of eac h to the tota l sound heard by the receiver . S ound-path mod eling st udies how sound from a source c hanges on its w ay to a receiver . Th e pieces t[...]

  • Seite 45

    38 TRG-TRC007 -EN note s period thre e A coustical Analysis As mentione d previously , the total sound hea rd by the receiver is the su m of sounds fro m multiple so urces, following mu ltiple paths. Af ter eac h path is modeled to determine its contributi on to the sou nd-pressure l evel at the receiver locatio n, the paths must be sum med to comp[...]

  • Seite 46

    TRG-TR C0 07-EN 39 period thre e A coustical Analysis note s Theoret ical eq uations aid the analy sis of so me path elements, bu t predicti on equations based on test d ata an d experience prevail . F or example, an acoustical lab m ay have measured the at tenuation and regenerated sound fro m a numbe r of dif ferent types of duct elbows at variou[...]

  • Seite 47

    40 TRG-TRC007 -EN note s period thre e A coustical Analysis S olving thes e algorithms m a nually ca n be tedious and time consumin g, especia lly when o ne or more p aths need f ur ther at tenuation and the calculations have to be repeated. F ortuna tely , computer sof tware tools are available to spare an alysts from the calcula tion-intensive eq[...]

  • Seite 48

    TRG-TR C0 07-EN 41 period thre e A coustical Analysis note s T erms Used in S ound-P ath Model ing This sec tion introd uces sev eral terms tha t are fairly sp ecific to th e science of acoustic s. At tenuation refers to the r eduction in sound le vel as sou nd travels along the path from a s ource to a re ceiver . It is typicall y used to refer to[...]

  • Seite 49

    42 TRG-TRC007 -EN note s period thre e A coustical Analysis The tot al sound en ergy that stri kes a surface (W i ) is either reflec ted (W r ), abs orbe d by t he m ater ial ( W a ), or t r ansmit ted through the material (W t ). A material provides a bar rier to the i ncident so und energy (W i ) when it reduces the amount of s ound energy that i[...]

  • Seite 50

    TRG-TR C0 07-EN 43 period thre e A coustical Analysis note s The ability of a material to reduce transmit ted sound is mos t commonly refer r ed to in te rms of its ins er tion loss, noise reduc tion, or tran smission loss. Inser tion loss and noise reduction are both based on actua l sound-pressure measureme nts and are exp ressed in te rms of dB [...]

  • Seite 51

    44 TRG-TRC007 -EN note s period thre e A coustical Analysis Absorptive material s work by c onve rting a c oustical energy into heat ene rgy . The abso r bed ener gy (W a ) is the p or tion of the inc ident sound energy (W i ) that is ne ither transmit ted through the material nor reflected of f the material. The abso r ptivity of a mate rial depen[...]

  • Seite 52

    TRG-TR C0 07-EN 45 period thre e A coustical Analysis note s Finally , som e of the i ncident sou nd energ y (W i ) bounces of f of (or is reflected from) the mate rial. R eflected sound beco mes espe cially impor tant when the sound so urce and the receiver are loc ated in the same room. Consider a mec hanical equipment roo m that co ntains a w at[...]

  • Seite 53

    46 TRG-TRC007 -EN note s period thre e A coustical Analysis Receiv er sound correction , als o called r oom effec t , is the re lationship between the sound en erg y (sound power) e ntering the room and the sound pressure a t a given point in th e room where the receiver he ars the sound. This re duction in s ound is due to a combin ation of ef fec[...]

  • Seite 54

    TRG-TR C0 07-EN 47 note s period f our Equipment Sound Rating As explain ed in P eriod One, sound pressure can be directly measured, however , sound power cannot. Bec ause sou nd pressure i s influence d by the sur roundings, the most accurat e sound data that can be provi ded for a piece of equipment is sound power . S ound-power level s are deter[...]

  • Seite 55

    48 TRG-TRC007 -EN note s peri od four Equipment Sound Rating Fields o f Measurement T o m easure sound pressure correc tly , it is im portant to understand the behavior of sound i n various en vironmen ts, or fields . In theory , a free field is a homoge neous, isotropic me dium that is free from boundaries . In pract ice, an example of a free fiel[...]

  • Seite 56

    TRG-TR C0 07-EN 49 peri od four Equipment Sound Rating note s This type of relationship betwe en distance and s urface area p rovid es the following simple m athematica l model for es timating how sound will c hange as the di stance from th e source increase s. L p2 = L p1 - 20 lo g 10 [r 2 / r 1 ] where, L p2 = sou nd-pressure le vel at dist ance [...]

  • Seite 57

    50 TRG-TRC007 -EN note s peri od four Equipment Sound Rating In practic e, this equa tion is com m only used to determine how loud a piece of equipment will be at a given distanc e. F or exampl e, the manufa cturer of a n air - cooled c hille r lists the s ound-pressu re level of the chi ller as 95 dB at a distance of 30 ft (9.1 m) from the c hille[...]

  • Seite 58

    TRG-TR C0 07-EN 51 peri od four Equipment Sound Rating note s The near field is an area adjacent to the source w here soun d does n ot behave as it wo uld in a f ree field. Mos t sound sou rces, including all HV AC equip ment, do not ra diate sound in perfectly spherical w aves. This is due to the ir regular shape of the equipmen t and differe nt m[...]

  • Seite 59

    52 TRG-TRC007 -EN note s peri od four Equipment Sound Rating A reve rberant f ield is nearly the opposite of a free field. Reve rberant fields exist in rooms with reflective walls, floors, and ceilings. When a sound source is placed in an enclosed room, the so und wave s from the s ource bounce bac k an d for th betwee n the reflective w alls many [...]

  • Seite 60

    TRG-TR C0 07-EN 53 peri od four Equipment Sound Rating note s Most rooms in buildings a re somewhere between a free field and a reverberant fiel d enviro nmen t. Cal led a semire ver berant field , these spa c es have some c haracteristic s of both free field and reverberant fiel d env ironments. The walls, floor , and ceili ng preven t the sound f[...]

  • Seite 61

    54 TRG-TRC007 -EN note s peri od four Equipment Sound Rating HV A C Equ ipment S ound Rating As mentione d earlier , becau se sound pressure is influence d by the sur roundings, of ten the best w ay for an equip ment manufac turer to pro vide sound dat a is to provide s ound-power le vels. S ound-power le vels fo r man y types of HV AC equip ment a[...]

  • Seite 62

    TRG-TR C0 07-EN 55 peri od four Equipment Sound Rating note s The mos t common te st method for HV AC equipment is the rev erberant-room method . The objective of a reverberan t room is to create a uniform, or dif fuse, sound fiel d by reflectin g and mixing the sound w aves. T he wa lls, floor , an d ceiling of the reverberant room are hard, in or[...]

  • Seite 63

    56 TRG-TRC007 -EN note s peri od four Equipment Sound Rating The free-field method is comm only used fo r HV AC equip ment that is too large to be tested in a reverberant room. This includes water c hiller s, cool ing towers, and the outdoor sound from pa c k aged roof top air conditioners and air -cooled conden sers. This type of equipment is plac[...]

  • Seite 64

    TRG-TR C0 07-EN 57 peri od four Equipment Sound Rating note s Forma l standards are writ ten by indu stry organizati ons to promote unifo rmity of data betw een dif ferent manufacturers. Air -Conditioning & R efrigeration Institute (ARI), the Air Movement and Control Association Interna tional (AMCA), and the Ame rican S ociety o f Heating, R e[...]

  • Seite 65

    58 TRG-TRC007 -EN note s peri od four Equipment Sound Rating One of the best e xamples to dem onstrate the com plexity of gathering complete and acc urate sound d ata is air -handling equipm ent. This in volves a ny typ e of HV AC equ ipment that c ontains a fa n and is us ed to condi tion and mo ve air through a duc t system. Consider tha t eac h [...]

  • Seite 66

    TRG-TR C0 07-EN 59 peri od four Equipment Sound Rating note s In order to isolate these dif ferent paths, the air handler must be teste d using a number of differe nt configurations. F or example, to determine the portion of the sou nd that is dis c harged with the air into the s upply ductw ork, the air handler is installed outsid e of the reverbe[...]

  • Seite 67

    60 TRG-TRC007 -EN note s peri od four Equipment Sound Rating Historically , there have been s everal metho ds used to generate sound data fo r air ha ndli ng eq uipm ent . Though inc reasingly le ss commo n, there ar e still cases where fan-s ound levels are based on prediction equation s suc h as the generic fan algorithm publi shed long ago by AS[...]

  • Seite 68

    TRG-TR C0 07-EN 61 peri od four Equipment Sound Rating note s The objective of ARI Standard 260–200 1, Soun d Rating of Ducted Air Moving and Conditioning Equipme nt , is to deli ver sound data that accurately represents the acous tical impa ct of the air -handling equipm ent af ter it is installed. This sta ndard uses the reverbe rant-room metho[...]

  • Seite 69

    62 TRG-TRC007 -EN note s peri od four Equipment Sound Rating Depending o n the type of equipmen t, sound rating s for HV AC e quipment are typically given as sound-p ower levels by octave ba nd or as a single dBA ra ting. Outdoor eq uipment, suc h as an air -cooled c hiller or conde nsing unit, m ay be rated in terms of A-weighte d sound-pres sure [...]

  • Seite 70

    TRG-TR C0 07-EN 63 note s W e will now r eview th e main con cepts that w ere co vered in this clinic on t he fundamenta ls of HV AC acous tics. P eriod One explained some of the basic concepts of s ound. S ound is the audible em issions resulting from the vi bration of molec ules with in an elasti c medium. It is generated at many dif ferent frequ[...]

  • Seite 71

    64 TRG-TRC007 -EN note s peri od five Review P eriod T wo di scussed how the hum an ear perceives sound. As a selective sensory organ, th e human ear i s more sens itive to high frequen cies than to low frequ encies. The se nsitivity of the human ear at a par ticular fre quency also c hanges with loudnes s. Man y single-num ber rating sys tems have[...]

  • Seite 72

    TRG-TR C0 07-EN 65 peri od five Review note s P eriod Three wal ked through the step s of an acoustica l analysis , inclu ding set ting the des ign target for the indoor or outdoo r environment, an d performing a s ource–path –receiver analys is. This m ethod of anal ysis traces sound from t he source to the location where we want t o predict t[...]

  • Seite 73

    66 TRG-TRC007 -EN note s peri od five Review P e riod Four int roduced two common meth ods used by HV AC equipment manufactu rers to provid e accurate sound data. Because sound press ure is influence d by the sur roundings, t he most useful soun d data th at can be provide d for most pieces of equipment is sound pow er . S ound-power level s are de[...]

  • Seite 74

    TRG-TR C0 07-EN 67 peri od five Review note s For m ore information, r efer to the following reference s: n Acoustics in Air Condition ing Applicatio ns Engineerin g Manual (T rane literature order number FND-AM-5) n T rane Acoustic s Pr ogram (T AP™) n A SHRAE Handbook – Funda mentals (c hapter 7 , 20 0 1) n A SHRAE Handbook – Applications ([...]

  • Seite 75

    68 TRG-TRC007 -EN Questions f or P eriod 1 1 What unit of measure is used to describ e frequency? 2 Define a ton e. 3 S ound _____ __ (power o r pressure) is what our ea rs hear and is influenced by the su rroundings. Questions f or P eriod 2 4 Whic h of thes e two s ingle-number descriptors, A-weighted soun d pressure level or N oise Criteria (NC)[...]

  • Seite 76

    TRG-TR C0 07-EN 69 Quiz note s Questions f or P eriod 3 7 T rue or Fals e: Sound can only travel from a source to the receiver along one path. 8 T rue or Fa lse: One piece of HV AC equipme nt may contain s everal soun d source s. 9 What term is used to describe the reduc tion in sound that enters a room as it travels to the receiver? It is influenc[...]

  • Seite 77

    70 TRG-TRC007 -EN 1 Hertz (cycle s per seco nd) 2 A sound at a single freq uency . A sound at a nar row band of freque ncies that is s ignificantly greater than the sound a t adjacent f r equenci es wou ld be simila r to a tone. 3 S ound pressu re 4 A-weighted sound-press ure level is bet ter for describin g outdoor sound 5 Noise Criteria rating is[...]

  • Seite 78

    TRG-TR C0 07-EN 71 abso rbed sound S ound energ y that strikes a material and is con ver ted from sound ene rgy to h eat energ y within the ma terial. absor ption coef ficient The ratio of the soun d energy absorbed by the material to the t otal sound e nergy in cident upon the surfa ce of that ma terial. AMCA Air Mo vement an d Control Associat io[...]

  • Seite 79

    72 TRG-TRC007 -EN Glossary her tz (Hz) The unit of mea s ure for frequen c y . One her tz is equal to one cycle per seco nd. inser tion loss (IL) The diffe rence in sound pres sure measu red in a sing le locat ion, with and without a noise co ntrol devi ce (installe d between the source and receiver) in p lace. near field The area a djacent to the [...]

  • Seite 80

    TRG-TR C0 07-EN 73 Glossary reverberant fie ld A uniform, or d iffuse , sound fiel d that is the opposite of a free field. In a perfectly reverberant field, the so und-pressure level is equal at all points. reverberant room A speciall y constructe d room with reflec tive walls, flo ors, and ceili ngs. When a sound sourc e is plac ed in this room , [...]

  • Seite 81

    74 TRG-TRC007 -EN note s Glossary the receiver , and ev erything it encounters as it travels along the w ay , constitute s the path. t one A sound in a single fre quency . A sound in a nar row band of frequ encies that is significan tly greater than the sound at adjacent freque ncies wou ld be similar to a tone. tra nsmit ted sound The sound tha t [...]

  • Seite 82

    Tr a n e An Ame rican S tandard Compan y www. trane.com For more infor matio n co ntact your local district office or e-mail us at comfor t@trane.co m Literature Or der Number TRG-TRC007 -EN File Number E/A V -FND-TRG-TRC007 -1 1 01 -EN Supersedes New Stoc king Lo cation La Cr osse Sinc e T rane has a po licy o f cont inuous produc t and product da[...]