Carrier 50UA-UH 135 - Gas Heating Operation Sequence; Gas Heating Operating Sequence

2SHUDWLQJVHTXHQFH
,IWKHUHLVDFDOOIRUKHDWLQJWKHRSHUDWLQJVHTXHQFHLVDVIROORZV
7KHHTXLSPHQWZLOOLPPHGLDWHO\VWDUWWKHYHQWLODWLQJEXUQHUE\SUHFOHDQLQJWKHFRPEXVWLRQFKDPEHUIRUDSUHVHWOHQJWKRIWLPH
$IWHUWKHSUHFOHDQLQJSKDVHWKHLJQLWLRQSKDVHVWDUWVWKHHTXLSPHQWRSHQVVROHQRLGYDOYH(9DQGLQSDUDOOHOVROHQRLGYDOYH
(93ZKLFKVXSSOLHVJDVWRWKHSLORWEXUQHU$IWHUGHWHFWLQJWKHSLORWIODPHWKHHTXLSPHQWRSHQVWKHPDLQJDVYDOYH(9WR
VXSSO\JDVWRWKHPDLQEXUQHU$IWHUDWLPHRIGXDOIXQFWLRQLQJRIWKHWZREXUQHUVSLORWDQGPDLQWKHPRGXODWLRQ3&%
UHPRYHVJDVIURPWKH(93YDOYHDQGWXUQVRIIWKHSLORWEXUQHU$VLQJOHHOHFWURGHGHWHFWVWKHIODPHERWKIRUWKHSLORWEXUQHUDQG
WKHPDLQEXUQHU7KHLJQLWLRQSURJUDPOLJKWVWKHEXUQHUWRREWDLQDQLQWHUPHGLDWHOHYHOKHDWRXWSXWZKLFKFRUUHVSRQGVWRDERXW
RIWKHPD[LPXPRXWSXW2QFHWKHIODPHLVVWDELOLVHGIRUDIHZVHFRQGVDWLJQLWLRQSRZHUWKHEXUQHUEHJLQVWRPRGXODWHLWV
RXWSXWWRUHDFKPD[LPXPRXWSXWLIUHTXLUHGLQDYDULDEOHOHQJWKRIWLPHSURJUDPPHGLQWRWKHPRGXODWLRQ3&%
'XULQJRSHUDWLRQWKHPRGXODWLRQ3&%ZLOOUHJXODWHWKHKHDWRXWSXWRIWKHEXUQHUSURSRUWLRQDOO\WRWKHYROWDJH9GF
FRPLQJIURP7RXFKSLORWFRQWUROEDVHGRQKHDWGHPDQG
:KHQWKHKHDWLQJGHPDQGLVVDWLVILHGVLJQDOOHGLQDYROWDJHORZHUWKDQWKHSUHVHWOLPLW9GFWKHPRGXODWLRQ3&%WXUQV
RIIWKHEXUQHUWKHIDQFRQWLQXHVWRYHQWLODWHWKHFRPEXVWLRQFKDPEHUSRVWZDVKIRUDSUHVHWOHQJWKRIWLPH2SHQLQJ
WKH212))FRQWDFWDOZD\VFDXVHVWKHEXUQHUWRVWRSZLWKRXWFDXVLQJDIDXOW
,PSRUWDQW1RWH7KHVXSSO\IDQPXVWEHDOZD\V21EHIRUHVWDUWLQJWKHKHDWHUDQGPXVWEHPDLQWDLQHG
21IRUORQJHUWKDQWKUHHPLQXWHVDIWHUVWRSSLQJWKHKHDWHU7KLVFRQGLWLRQLVDOZD\VVDWLVILHGE\WKH
WRXFKSLORWFRQWURO
Detection electrode
Ignition electrode
EVP
EV1 and EV2
Gas valve
Pilot burner
&RQGHQVDWHGUDLQ
40