Bradford White UCG100H399, Service Manual

Page: 31 / 48

3 1
1 2 0 vo l t potentia l exposure . I so l ate the
app l iance and recon f irm po w er is
disconnected using a mu l ti - meter .
W AR NIN G
Ser vi ce Proce du re V I :
F lam e Se ns or T e sting and R e pla ce m e nt
F lam e Se ns or R e pla ce m e nt Proce du re
S tep 1 . P osition main po w er s w itch to “ O FF ”
S tep 2. Disconnect ( unp l ug ) w ater heater f rom 1 2 0 vo l t po w er
source .
S tep 3 . Un -l atch & remove surround cover f rom top o f heater .
S tep 4. Disconnect w ire l ead f rom f l ame sensor .
S tep 5 . R emove the 2 sensor mounting scre w s ( magnetic tip, l ong reach P hi ll ips scre w driver ) and remove f l ame
sensor & gasket f rom transition base f l ange .
S tep 6 . R emove any residua l gasket materia l f rom transition base f l ange .
S tep 7 . I nsta ll ne w f l ame sensor w ith ne w gasket provided using scre w s f rom step 6 . A rrange f l ame sensor w ith hook
to w ards burner .
S tep 8 . R econnect f l ame sensor w ire .
S tep 9 . R estore 1 2 0 vo l t po w er supp l y to w ater heater and con f irm proper operation f o ll o w ing the l ighting instructions
on the l ighting instruction l abe l or the l ighting instructions l ocated in the insta ll ation and operating instruction
manua l.
S tep 1 0 . R ep l ace surround cover on top o f w ater heater .
Fl ame S ensor
31