Xav txog qhov no: nws yog ib qho dej khov rau hnub Monday sawv ntxov, koj txav mus rau hauv chav dej, ntswj lub kais dej kub, thiab… tsis muaj dab tsi tab sis dej khov - dej txias. Ua ntej koj liam tag nrho lub rhaub, xav txog qhov tsis muaj tus hero- lub rhaub dej kub thermocouple. Tus ntiv tes no- tus pas nrig loj yog tus kaw ntsiag to nruab nrab ntawm koj thiab muaj peev xwm tso pa tawm. Hauv ob peb feeb tom ntej no koj yuav kawm paub tseeb tias nws ua li cas, vim li cas nws ua tsis tiav, yuav ua li cas kuaj nws, thiab thaum twg los pauv nws tawm - txuag koj ob qho nyiaj thiab da dej txias heev.
Dab tsi yog Thermocouple Tiag tiag (Tsis yog, Nws tsis yog Thermostat)
Lub thermocouple yog qhov hloov pauv kev nyab xeeb ua los ntawm ob qhov sib txawv ntawm cov hlau sib txuas ntawm ib kawg. Thaum qhov kev sib tshuam yog cua sov los ntawm cov nplaim taws, nws ua rau me me DC voltage-kwv yees li 20-30 millivolts. Qhov minuscule tam sim no txaus los tuav qhib lub tshuab hluav taws xob electromagnetic. Yog tias tus tsav tawm mus, qhov hluav taws xob ploj mus, lub valve kaw, thiab cov roj av tsis tuaj yeem ua rau dej nyab koj lub txee dai khaub ncaws. Xav tias nws yog "tuag- txiv neej hloov" rau koj lub rhaub dej.
Nws txawv li cas los ntawm Thermopile lossis Nplaim Sensor
Cov cua sov tshiab qee zaum siv cov thermopile (ib pawg ntawm cov thermocouples) uas tsim tau txog li 750 mV- txaus rau lub hwj chim me me Circuit Court board thiab txawm tias muaj teeb pom kev zoo LED. Ib qho hluav taws xob sensor, ntawm qhov tod tes, pom muaj nyob rau hauv qhov cub nrog hluav taws xob hluav taws xob; nws tsuas yog paub meej tias muaj nplaim taws thiab xa cov teeb liab yog / tsis muaj. Koj qhov kev sib tw classic- lub tshuab rhaub dej kub tseem tso siab rau qhov txo qis ib qho thermocouple vim nws ua tsis tiav - yooj yim, tsis ua tsis tiav - nyab xeeb.
Kauj Ruam -los ntawm - Kauj ruam Pilot Teeb pom kev zoo
Teem lub pob qhov rooj tswj roj rau "Tawm" thiab tos 5 feeb kom muaj cov pa phem kom ploj mus.
Tig lub pob qhov rooj mus rau "Pilot," nias nws, thiab teeb tus tsav nrog lub teeb ntev.
Khaws lub pob qhov rooj rau 60 vib nas this kom lub thermocouple tuaj yeem ua kom sov.
Tso lub pob qhov rooj -yog tias tus tsav nyob twj ywm, koj yog kub. Yog hais tias nws snuffs tawm, lub thermocouple yog xav tias.
Table: Tus tsav yuav tsis nyob twj ywm -Symptom Decoder
| Cov tsos mob | Tej yam ua txhaum | DIY Kho |
|---|---|---|
| Pilot teeb tab sis tuag tam sim ntawd | Thermocouple hau tsis engulfed los ntawm nplaim taws | Re- txoj hauj lwm ⅛ hauv. rau hauv lub khob xiav |
| Pilot teeb, tuag tom qab 30 s | Tsis muaj zog thermocouple voltage (<12 mV) | Hloov chav tsev |
| Pilot teeb, nrov nias, ces tawm | Faulty magnetic gas valve | Hu rau daim ntawv tso cai tech |
Cov cuab yeej koj yuav xav tau rau 15-feeb Thermocouple Swap
Koj tsis xav tau lub tsheb thauj khoom ntawm cov iav zoo nkauj - tsuas yog:
⅜-hauv. thiab ½-in. qhib -kawg wrenches
Adjustable pliers
Zoo -grit emery ntaub
Multimeter nrog millivolt ntau yam
Thermocouple tshiab (ntev sib npaug rau koj lub rhaub- qhov ntau thiab tsawg yog 18 in., 24 in., thiab 36 in.)
Pro cov lus qhia: Yuav cov khoom siv uas suav nrog cov xov sealant thiab lub raj xa dej tshiab ferrule; re- siv cov txiv ntseej qub feem ntau ua rau micro- tawm.
Kev Nyab Xeeb Ua Ntej: Gas Shutdown & Leak Detection
Ua ntej koj kov ib yam dab tsi, tig lub roj- tswj valve rau "Tawm." Tom qab ntawd kaw lub valve ntawm phau ntawv roj ntawm cov khoom siv - feem ntau yog liab lossis daj. Tom qab kho, txhuam dej xab npum rau txhua lub koomhaum uas koj cuam tshuam. Tsis muaj npuas, tsis muaj teeb meem. Yog tias koj hnov cov qe lwj ntawm ib qho twg, nres, ua pa, thiab hu rau lub tuam txhab hluav taws xob.
Yuav Ua Li Cas Tshem Tawm Qhov Qub Thermocouple hauv 4 Tsiv
Unscrew lub thermocouple txiv ntoo nyob rau hauv qab ntawm lub gas valve (sab laug-loosey).
Xaub qhov kev sojntsuam tawm ntawm lub bracket sab xis ntawm tus tsav lub raj.
Ua raws li cov kab txhuas rov qab mus rau lub hau npog; tshem tawm ¼-in. ntsia hlau tuav lub clamp.
Maj mam rub tag nrho cov kev sib dhos dawb -tsis muaj yanking, los yog koj yuav kink lub pilot tube.
Coj ib daim duab hauv xov tooj ua ntej; koj tus kheej yav tom ntej yuav ua tsaug rau koj thaum nws yog lub sij hawm los sib sau ua ke.
Txhim kho Tus Tshiab Yog li Nws kav Lwm xyoo caum
Rov qab cov kauj ruam tshem tawm, tab sis khaws cov ntsiab lus zoo dua hauv siab:
Lub rooj zaum tshiab kom cov nplaim taws ua rau thawj ⅜ hauv lub thermocouple.
Tes-tighten lub valve txiv ntseej, ces snug xwb ¼-tig ntxiv- dhau- torqueing tawg lub ferrule.
Hla txoj kab deb ntawm qhov hluav taws kub; radiant tshav kub shortens lub neej.
Hluav taws kub txhua yam thiab xyuas qhov kub thiab txias nrog rab phom infrared-zoo tshaj 500-700℃F.
Kev kuaj Millivolt tso zis yam tsis muaj Fancy Lab
Teem koj lub multimeter rau DC millivolts, clip qhov zoo coj mus rau lub thermocouple taub hau, thiab qhov tsis zoo rau lub cev valve. Teeb tus tsav thiab nyeem tom qab 60 s. Ib chav tsev noj qab haus huv tso tawm 20-30 mV. Yog tias koj qis dua 14 mV, cov hlau nplaum tsis tuaj yeem tuav, thiab lub valve yuav poob tawm. Tsis muaj multimeter? Hloov pauv hauv qhov tshiab txawm li cas los xij-thermocouples qis dua $ 15, pheej yig dua li kev hu xov tooj.
Daim duab: Thermocouple Voltage vs. Temperature
| Nplaim kub (degree F) | Millivolt tso zis |
|---|---|
| 300 | 8mv ua |
| 500 | 18mv ua |
| 700 | 28mv wb |
| 900 | 32 mV (ntev) |
Daim ntawv ceeb toom qhov chaw qab zib yog 600-750℃F; hotter tsis pab, tab sis txias dua tua kev ntseeg tau.
Sab saum toj 5 Vim Li Cas Thermocouples Tuag Hluas
Corrosion- Sulfur nyob rau hauv natural gas tsim ib tug dub crust uas insulates lub ntsis.
Hlau qaug zog- Ntau xyoo ntawm kev nthuav dav / kev cog lus tsis muaj zog rau kev sib tshuam bimetal.
Pilot orifice clog- Cov nplaim daj tub nkeeg NW nyuam qhuav hnia lub thermocouple.
Loose kev twb kev txuas– Txawm tias ib tug ½- tig slack txiv ntseej poob millivolts hauv qab qhov pib.
Khoov vojvoog ntau dhau- Cov kinks ntse ua haujlwm- ua kom tawv tawv ntawm cov ntaub tooj liab thiab snap cov hlau hauv.
Kev Tiv Thaiv Kev Tiv Thaiv Koj tuaj yeem ua txhua lub caij nplooj zeeg
Nqus lub qhov cub kom tshem tawm cov lint thiab plua plav.
Polish lub thermocouple taub nrog daim ntaub emery - ci tseem ceeb.
Tshawb xyuas cov nplaim taws; nws yuav tsum yog nkig xiav nrog lub suab nrov me ntsis, tsis yog tub nkeeg daj.
Cycle lub roj valve ntawm "Off" mus rau "pilot" mus rau "On" tsib zaug kom cov hlau nplaum dawb.
Siv 10 feeb, nce 10 xyoo.
Thaum twg los hloov tag nrho Gas Valve Hloov
Yog hais tias ib hom khoom tshiab - thermocouple tshiab tseem yuav tsis tuav, cov hlau nplaum hauv lub valve yog toast. Lwm cov chij liab:
Gas tsw txawm tias thaum tus tsav tawm (valve seat to).
Knob tig dawb yam tsis muaj detents -cov cam yas yog stripped.
Pom pom xeb ntawm lub cev lub cev -Cov kab lus sab hauv tuaj yeem raug cuam tshuam.
Ib txoj haujlwm valve khiav $ 150- $ 250 hauv ib leeg; hnyav qhov ntawd tiv thaiv lub tshuab cua sov tshiab yog tias koj lub tank twb tau 8+ xyoo lawm.
Tus nqi tawg: DIY vs. Pro Service
| Yam khoom | DIY | Tus kws kav dej |
|---|---|---|
| Thermocouple | $12 | $45 |
| Labor | 0 | $150–$200 |
| Tag Nrho Sijhawm | 20 feeb | 2 teev (nrog rau kev mus ncig) |
| Txuag | 100 % | - |
Txawm hais tias koj yuav ib lub thermocouple spare txhua xyoo, koj tseem muaj nyiaj ua ntej.
Eco Angle: Yuav Ua Li Cas Noj Qab Haus Huv Thermocouple Txuag Roj
Lub thermocouple ntws los yog tsis muaj zog ua rau koj ua rau tus neeg tsav tsheb rov ua dua, tso cov pa me me ntawm cov methane uas tsis tau hlawv txhua lub sijhawm. Tshaj li ib xyoos uas yog kwv yees li 5–7 therms-kwv yees li $10–$15, ntxiv rau 40 lb ntawm CO₂. Muab faib los ntawm 50 lab sawv ntsug-pilot heaters hauv North America thiab peb tab tom tham cov pa roj carbon loj. Khaws lub thermocouple zoo siab thiab koj nyob nraum ntsuab dua li qhov koj xav.
Ceev-Qhia FAQ
Q:Kuv puas tuaj yeem txiav lub thermocouple ntev dua kom haum?
A:Tsis yog- trimming lov lub foob thiab cia ya raws, tua raug.
Q:Puas yuav muaj cov thermocouple ua haujlwm?
A:Xov loj yog universal ⅜-in. UNF, tab sis qhov ntev yuav tsum sib phim kom lub taub hau zaum hauv nplaim taws.
Q:Kuv yuav tsum hloov nws li cas?
A:Txhua txhua 5-7 xyoo, los yog tam sim ntawd yog tias kev tsav tsheb tsis tu ncua.
Qhwv -Up: Cia Lub Kub Kub Ntws
Lub tshuab rhaub dej kub thermocouple yog txoj cai pov hwm pheej yig tshaj plaws hauv koj lub tsev tag nrho. Ib feem $12, ib 15-feeb sib pauv, thiab koj tau lav lwm ib nrab- xyoo caum ntawm steamy da dej yam tsis muaj cov pa roj me ntsis. Tackle nws hnub Saturday sawv ntxov-koj lub neej yav tom ntej sov, zoo siab tus kheej yuav ua tsaug rau koj.