Installation: Installer sib npaug tsis zoo airflow kev ua tau zoo ntawm saj zawg zog ducts. Kev txhim kho zoo sib npaug sib npaug ntawm kev ua haujlwm zoo ntawm airflow los ntawm cov kav dej hloov tau yooj yim. Koj txiav txim siab seb koj cov khoom yuav ua haujlwm li cas. (hais los ntawm David Richardson)
Ntau tus hauv peb txoj kev lag luam ntseeg tias cov khoom siv hluav taws xob siv hauv kev teeb tsa txiav txim siab lub peev xwm ntawm HVAC qhov system txav huab cua. Vim qhov kev xav no, kev hloov pauv hloov pauv feem ntau tau txais qhov phem rap. Qhov teeb meem tsis yog hom khoom siv. Hloov chaw, peb nruab qhov khoom.
Thaum koj sim cov tshuab tsis muaj txiaj ntsig uas siv cov ducting hloov tau yooj yim, koj yuav ntsib teeb meem kev teeb tsa rov qab uas txo cov cua ntws thiab txo kev nplij siab thiab kev ua haujlwm. Txawm li cas los xij, los ntawm kev xyuam xim rau cov ntsiab lus, koj tuaj yeem kho tau yooj yim thiab tiv thaiv qhov yuam kev feem ntau. Cia peb saib tsib lub tswv yim los pab koj txhim kho qhov hloov pauv tau zoo kom koj lub cev ua haujlwm zoo.
Txhawm rau txhim kho qhov zoo ntawm qhov kev teeb tsa, tsis txhob tig ntse ntawm cov yeeb nkab khoov ntawm txhua tus nqi. Lub kaw lus ua haujlwm zoo tshaj plaws thaum koj tso cov kav dej kom ncaj li sai tau. Nrog ntau yam teeb meem hauv tsev niaj hnub, qhov no tsis yog ib qho kev xaiv.
Thaum cov yeeb nkab yuav tsum tau tig, sim ua kom tsawg kawg nkaus. Ntev, dav lem ua haujlwm zoo tshaj plaws thiab cia huab cua hla tau yooj yim dua. Sharp 90 ° khoov lub raj hloov tau sab hauv thiab txo cov cua nkag. Raws li ntse lem txwv airflow, qhov zoo li qub siab nyob rau hauv lub system nce.
Qee qhov chaw uas cov kev txwv no tshwm sim yog thaum cov kav dej tsis raug txuas nrog kev tshem tawm thiab khau boots. Cov pob qij txha feem ntau muaj nruj tig uas cuam tshuam cov airflow. Kho qhov no los ntawm kev muab cov kav dej txaus los hloov cov kev taw qhia lossis los ntawm kev siv lub luj tshib hlau.
Cov txheej txheem framing yog lwm qhov teeb meem uas koj yuav pom hauv ntau lub tsev. Txhawm rau txhim kho qhov no, koj yuav tsum tau hloov cov yeeb nkab los yog nrhiav lwm qhov chaw kom tsis txhob tig qhov ntse.
Lwm qhov ua rau muaj cua tsis zoo thiab kev tsis txaus siab ntawm kev nplij siab yog sagging vim tsis txaus cov kav dej. Ntau tus neeg tsim khoom dai cov kav dej tsuas yog txhua 5-6 ko taw, uas tuaj yeem ua rau ntau qhov sagging hauv cov yeeb nkab. Qhov no mob zuj zus tshaj lub neej ntawm cov kav dej thiab txuas ntxiv txo cov cua ntws. Qhov zoo tshaj plaws, cov yeeb nkab hloov tau yuav tsum tsis txhob sag ntau tshaj 1 nti tshaj 4 ko taw ntev.
Khoov thiab sagging kav yuav tsum tau kev txhawb ntxiv. Thaum koj siv cov khoom dai nqaim xws li cov nplaum nplaum los yog xaim, cov kav dej yuav ua rau lub sijhawm no. Hauv qhov xwm txheej hnyav, cov xov hlau tuaj yeem txiav mus rau hauv cov kav dej, ua rau huab cua nkag mus rau hauv qhov chaw tsis muaj kev cia siab ntawm lub tsev.
Thaum cov kev tsis zoo no tshwm sim, huab cua raug thaiv thiab ua kom qeeb. Txhawm rau tshem tawm cov teeb meem no, teeb tsa kev txhawb nqa ntawm ntau zaus, xws li txhua 3 taw es tsis txhob 5, 6, lossis 7 ko taw.
Thaum koj txhim kho kev txhawb nqa ntau dua, xaiv koj cov khoom siv strapping kom zoo los tiv thaiv kev txwv tsis pub muaj. Siv tsawg kawg 3-nti clamps lossis hlau clamps los txhawb cov yeeb nkab. Yeeb Nkab Saddles yog cov khoom lag luam zoo uas tuaj yeem siv los txhawb cov kav dej hloov tau yooj yim.
Lwm qhov kev tsis zoo uas ua rau cov cua tsis zoo tshwm sim thaum cov tub ntxhais hloov pauv ntawm cov kav dej tau tawg thaum txuas nrog lub khau raj lossis thaum tshem tawm. Qhov no tuaj yeem tshwm sim yog tias koj tsis ncab lub hauv paus thiab txiav nws kom ntev. Yog tias koj tsis ua li no, qhov teeb meem sticking yuav exacerbated los ntawm compressing cov tub ntxhais sai li sai tau thaum koj rub lub rwb thaiv tsev ntawm lub khau raj los yog dab tshos.
Thaum kho cov ductwork, peb feem ntau tshem tawm txog li 3 feet ntawm cov tub ntxhais ntxiv uas yuav tsis tuaj yeem pom ntawm kev kuaj pom. Raws li qhov tshwm sim, peb ntsuas qhov airflow nce ntawm 30 mus rau 40 cfm piv rau 6 "duct.
Yog li nco ntsoov rub cov yeeb nkab kom nruj li sai tau. Tom qab txuas cov yeeb nkab rau hauv khau raj los yog tshem tawm, nruj nws dua los ntawm lwm qhov kawg kom tshem tawm cov tub ntxhais ntau dhau. Xaus qhov kev sib txuas los ntawm kev txuas mus rau lwm qhov kawg thiab ua kom tiav lub installation.
Tej thaj chaw deb plenum chambers yog lub thawv duab plaub los yog daim duab peb sab ua los ntawm ductwork nyob rau sab qab teb attic installation. Lawv txuas cov yeeb nkab loj hloov mus rau lub chamber, uas pub ntau cov kav dej me uas tawm hauv lub chamber. Lub tswv yim zoo li pheej hmoo, tab sis lawv muaj teeb meem uas koj yuav tsum paub txog.
Cov fittings no muaj lub siab poob siab thiab tsis muaj airflow kev taw qhia thaum airflow sim tawm ntawm qhov haum. Huab cua poob hauv plenum. Qhov no feem ntau yog vim qhov poob ntawm lub zog hauv qhov haum thaum cov cua nkag los ntawm cov yeeb nkab mus rau qhov haum txuas mus rau qhov chaw loj dua. Tej huab cua ceev yuav poob rau ntawd.
Yog li kuv lub tswv yim yog kom zam cov khoom siv no. Hloov chaw, xav txog qhov kev txhawb nqa txuas ntxiv, dhia ntev, lossis lub hnub qub. Tus nqi ntawm kev txhim kho cov vaj huam sib luag no yuav yog me ntsis siab dua li kev txhim kho cov chaw taws teeb plenum, tab sis kev txhim kho hauv airflow kev ua tau zoo yuav pom sai sai.
Yog tias koj loj duct raws li cov cai qub ntawm tus ntiv tes xoo, koj tuaj yeem ua tau zoo ib yam li yav dhau los thiab koj cov kav dej yuav tseem ua haujlwm tsis zoo. Thaum koj siv tib txoj kev uas ua haujlwm rau cov ntawv hlau piping rau qhov loj ntawm cov kav dej hloov tau yooj yim, nws ua rau cov cua tsis tshua muaj zog thiab siab zoo li qub.
Cov khoom siv yeeb nkab no muaj ob qhov sib txawv sab hauv. Cov ntawv hlau muaj qhov du, thaum cov hlau hloov tau muaj qhov sib npaug tsis sib xws. Qhov sib txawv no feem ntau ua rau muaj qhov sib txawv airflow ntawm ob yam khoom.
Tib tus neeg uas kuv paub tias leej twg tuaj yeem ua tau yooj yim ducting zoo li cov ntawv hlau yog Neil Comparetto ntawm Lub Comfort Squad hauv Virginia. Nws siv qee txoj kev txhim kho tshiab uas tso cai rau nws lub tuam txhab kom ua tiav cov yeeb nkab zoo tib yam los ntawm ob qho khoom siv.
Yog tias koj tsis tuaj yeem tsim Neal lub installer, koj lub cev yuav ua haujlwm zoo dua yog tias koj tsim cov yeeb nkab loj dua. Ntau tus neeg nyiam siv qhov sib txhuam ntawm 0.10 hauv lawv lub tshuab xam zauv yeeb nkab thiab xav tias 6 ntiv tes ntawm cov yeeb nkab yuav muab qhov ntws ntawm 100 cfm. Yog tias cov no yog koj qhov kev cia siab, qhov tshwm sim yuav ua rau koj poob siab.
Txawm li cas los xij, yog tias koj yuav tsum siv lub tshuab xam zauv Hlau Yeeb Nkab thiab qhov tseem ceeb, xaiv cov yeeb nkab loj nrog kev sib txhuam coefficient ntawm 0.05 thiab ua raws li cov lus qhia saum toj no. Qhov no ua rau koj muaj txoj hauv kev zoo dua ntawm kev ua tiav thiab qhov system uas nyob ze rau lub ntsiab lus.
Koj tuaj yeem sib cav txhua hnub txog txoj kev tsim cov kav dej, tab sis kom txog thaum koj ntsuas thiab xyuas kom meej tias qhov kev teeb tsa xa tawm cov cua uas koj xav tau, nws yog txhua yam kev kwv yees. Yog tias koj xav paub ntau npaum li cas Neil paub tias nws tuaj yeem tau txais cov khoom siv hlau ntawm coiled tubing, nws yog vim nws ntsuas nws.
Qhov ntsuas airflow tus nqi los ntawm qhov ntsuas lub dome yog qhov twg cov roj hmab ua tau raws li txoj kev rau txhua qhov hloov pauv duct installation. Siv cov lus qhia saum toj no, koj tuaj yeem qhia koj tus installer kom nce airflow cov kev txhim kho no coj mus. Pab lawv saib seb lawv txoj kev mloog zoo li cas rau kev nthuav dav tseem ceeb.
Qhia cov lus qhia no nrog koj tus installer thiab nrhiav kev ua siab loj rau nruab koj cov kav dej kom zoo. Muab sijhawm rau koj cov neeg ua haujlwm kom ua tiav txoj haujlwm zoo thawj zaug. Koj cov neeg siv khoom yuav txaus siab rau nws thiab koj yuav tsis tshua hu rov qab.
David Richardson yog Tus Tsim Kho Cov Ntawv Qhia thiab HVAC Kev Lag Luam Tus Kws Qhia ntawm National Comfort Institute, Inc. (NCI). NCI tshwj xeeb hauv kev cob qhia los txhim kho, ntsuas thiab txheeb xyuas qhov ua tau zoo ntawm HVAC thiab cov tsev.
If you are an HVAC contractor or technician and would like to learn more about high precision pressure measurement, please contact Richardson at davidr@ncihvac.com. The NCI website, www.nationalcomfortinstitute.com, offers many free technical articles and downloads to help you grow professionally and strengthen your company.
Cov Ntsiab Lus Txhawb Nqa yog ib ntu them nyiaj tshwj xeeb uas cov tuam txhab kev lag luam muab cov ntsiab lus zoo, tsis muaj kev ncaj ncees, tsis yog lag luam rau cov ntsiab lus txaus siab rau ACHR cov neeg mloog xov xwm. Tag nrho cov ntsiab lus txhawb nqa yog muab los ntawm cov tuam txhab tshaj tawm. Xav koom nrog peb cov ntsiab lus txhawb nqa? Hu rau koj tus neeg sawv cev hauv zos.
Ntawm Kev Thov Hauv qhov webinar no, peb yuav kawm txog qhov hloov tshiab tshiab rau R-290 ntuj refrigerant thiab nws yuav cuam tshuam li cas rau HVACR kev lag luam.
Post lub sij hawm: Apr-19-2023