Transcription of Issue18 Coil Circuiting - The Coil Company
1 HVACCOI LS SPACECO OLER S AIR HANDLING EQU IPMENTI ssue18 ThisIs sueCo il Cir cu it ing .. pg . 1-2St ock Hot Water Boo st er Coi ls ..pg . 2 CoilCompany,LL villePike,Malvern,PA 19355 Toll-F re e: il: sa le s@coilc ever y sale s mee tin g or tr ain ing session, therealw ays seemsto be a lot of confusion overth e circ uit ing of coils . Cir cuiting is not re ally as mysteriousas everyone mak es it out to re goin g to try an d clear it up in this newslett Circuiting ?Circ uit ing is noth ing mo re tha n the numberof tubeson any coil that are beingfed fr om th ehea de r. If th e hea de r (m anifold) is connectedto (6) tubes,then that coil has (6) circu its .If the hea de r is fe eding12 tubes, the n that coil has (1 2) CircuitingNecessary?Wh en wat er or re frig era nt are pa ssin g through a coil,yo u must con trol the speedof thewa te r or re frige ra nt.
2 If wa ter go es too slowlythroughth e tub es, you get littleor no hea ttr an sf er and yo u re in a condition ca lle d laminarflow .Whenwaterpassestoo qui cklyth ro ug h a coil, the n yo u get littleor no heat transferan d a hugepressure dropth at is notprac tic al. Yo u circ uit a co il to control the speedat whichthe heattransfermed ium pas sesth ro ug h th e co il. If you fe ed mult ip le tu bes,th en th e mediumtravelsslowlythr oughthe coi l,bec au se yo u v e sp rea d the flow through a lot of you feedfewertubes,the n yo uspe ed up th e flowth rou gh th e Circuiting ?The re are ve ry fe w lim its to cir cuiting. Most majo r manufac turershave codenames forth eir circ uitingpatt ern s, such as: full cir cuit, half cir cuit , doublecircuit,etc. Thesearenot hin g mo re tha n stand ard pat te rn s th at th ese co mpaniesof fer, bu t you certainlysh ou ldn tbe limited to th es e pa ttern s.
3 Coil Comp any has th e flexibilityto offerothercircuiting pat ternsth an st an da rd one mple :Co il size = 30 " . x 96" , 8 Rows(2 0 tubes/ rows) 5/8" tu bes GPM= 75 Thin k of this co il in te rmsof the tot al tubes th at is, thereare 20 tubes/ row x 8 row sdee p = 16 0 to ta l tu be s. Nowhow ma ny can we feed?Well,you co uld fee d any number oftu bes tha t you choo se , withthe stipu lat ion that it divid es evenlyinto 160 . Look at th e ta bl ebelo w fo r som e of the com bina tion s.#TubesFedTotal#T ubesPasses116016021608041604081602010160 16 HalfCircuit1616010201608 Full Circuit401604 Do ubleCircuitWe could fe ed (1 ) tu be , if we cho os e to do so. Thatwouldmeanthat 75 GPMis pa ssi ngth ro ug h 1 tu be at a tim e and the pre ssure drop mightbe 40,000 feet. Need lessto say , thi s iscontinuedonpage2 CoilCompan y sQuick Sh ip ProgramStand ardShi pAlmostall coilsshipin 4-5wee ks assta nd ar d.
4 Thereare som e exceptions,bas edon specialmateria ls , but 95%of al l coi ls willsh ip in 4-5 weekswit h no Da y ShipMos t coilsca n ship in 10 wo rk days(2 weeks)for a pre miu m of 20%based onthe si ze of the guarantee tha t theco il will shipon time or you don tpay thead dit io nal Work DaySh ipFo r major coil em er gen cie s, youcan ha veyo ur co il shi p in 5 wor k days(1 week).There qu ired premi um for this shi pm ent is 40%.We gu aranteeshipmen t or youdon t pa ythe l circ uiti cuitingWhatisit?Whyisitnecessary?Arether elimits?Coil ci rcu it , LS SPACECO OLER S AIR HANDLING EQU IPMENTnot a goo d se lec tio n. Yo u co uld fe ed (2) tub es and have371/2GP M goingthr ougheachtu be. This is n t a muc h be tt er selec tio n. Th e mostcommon selectionswouldbe to feed 20tu bes , 8 pa ss (f ull cir cuit ) or 40 tube s, 4 pass(do ublecircuit).
5 Theseare th e selections th atmost of th e time wo uld be bes t, bu t you should not be limit ed strictlyto thes e sel ect s bes t to un der st and the con cep t of cir cu itin g, ratherth an attemptto memori ze ci rc ui tingpatte rn s. You have two restr icti ons wh en sele ctin g th e nu mbe r of tu bes tha t you wi shto fe ed :1Th e nu mb er of tub es tha t you fe ed mustdivideevenlyin to the total numberof tu bes in the coil. In the abov e exam ple , you can tfeed(9 ) tu bes because9 do es n t div id e eve nly into 16 e nu mb er of pas ses tha t are ge nera ted th roughthe coil must be an evennumber,if you wis h to end up withthe same end you startat one end ofth e co il an d gen era te 1, 3, 5, 7, etc . pa ss es, thenyo u will haveoppositeendco nn ec tio ns . The vas t ma jorityof coils mustbe sameend con nec ted.
6 This is of tena req uirem en t to determine the number of tubesthat yo u wis h to eref ore,yo u ne ed 2, 4, 6, 8, pas ses etc . to get same end connectio ns 160 tu bes with40 circ uit s = 4 pa ss es .ComputerProgramAlso , it s imposs ible to fully utilizeCo il Comp an y s selection programunlessyou und erst an dth e con ce pt of circ uit ing. You will alwa ys get an answer,no matterwhatnumberof tubesth at you fee d. You jus t won t get a me an ingfulanswerthat you can ere are no re dlig ht s or s to p sig ns in the pro gra m that will directyou to th e rightcircuitingpattern. Yo umu st unde rst an d how a coi l wo rk s to fullyuse our progra m or any man ufacturer spro gra Company , ville Pike,Malvern,PA 19355 Toll-F re e: il: sales @coilc Web: ockHotWaterBoosterCoilsReplacementHotWat erBoosterCoils,ShippedfromStockin 1 dayto 3 daysIt seem s ther e s nev er a co nven ien t timeto install hot waterdu ct co il s.
7 Whe n it s timeyou kn ow it, and yo u knowyou need to in stallth em fast,witha qualityco il specifiedfor yo ur app li cat ion .Coi l Co mp an y consi sten tl y shi ps a bro ad ran ge of hot waterduc t co ils, an d applyin gour co mbi ned ex per ie nce of mo re than75 year s we l l makesu re th e coi l su its thespec if ica ti on s of yo ur appl ica ti on . 1 an d 2 row coi ls in 33 di ffer en t sizesfr om 6" X 12 " to 30" X 60 " Fl ang ed or Sli p & Driv eForallyourcoilneeds,technicalinformatio norquestions,callourtoll-freenumber80 0- 52 3- 75 90Ho t Wa te r Boos ter Coilssize d fr om 6" x 12" to 30" x 60",sh ippe d fro m stoc k in 1-3 day
