Bradford White UCG100H399, Service Manual

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S er vi c e P ro c e du re III :
B u r n er Tub e Insp e c ti o n and R e pla c e m e nt
B u r n er Tub e Insp e c ti o n
S tep 1 . Insp e c t bu r n er tub e as f o ll ow s ( A c o t e c h m e tal f ib er m e s h bu r n er) .
a ) O ute r f i b e r mesh shou l d b e un i fo r m w i th no tea r s o r dete ri o r at i on .
b ) G ent l y s q uee z e b u r ne r tu b e , Bu r ne r tu b e shou l d fee l f ir m w i thout any soft a r eas a r ound the s i des o r at the
b ottom .
c ) V i sua ll y i nspect i ns i de b u r ne r tu b e , Bu r ne r tu b e shou l d b e i ntact w i th no a r eas of dete ri o r at i on . P o r ts
shou l d b e f r ee of any de b ri s .
S tep 2. I f b u r ne r tu b e i s affected b y any of the a b ove , r ep l acement i s r e q u ir ed . Refe r to b u r ne r tu b e r ep l acement
p r ocedu r e b e l ow .
B u r n er Tub e Re pla ce m e nt Proce du re
No t e: P r ov i de the mode l and se ri a l num b e r fo r the co rr ect r ep l acement b u r ne r .
S tep 1 . F u ll y i nspect b u r ne r f l ange gas k ets , i gn i te r and f l ame senso r gas k ets fo r the fo ll ow i ng :
a ) T ea r s
b ) M i ss i ng mate ri a l
c ) C r ac k s
d ) D ir t o r de b ri s
e ) O the r i mpe r fect i ons that wou l d i nh i b i t p r ope r sea l
I f gas k ets a r e N O T affected b y any of the a b ove , gas k et r ep l acement i s not r e q u ir ed .
S tep 2. I nsta ll b u r ne r tu b e w i th gas k ets i nto b u r ne r mount i ng i nse r t . Be su r e gas k et su r faces a r e f r ee of de b ri s .
S tep 3 . Reconnect the b l owe r/ gas va l ve / t r ans i t i on assem b l y to b u r ne r mount i ng i nse r t . S ecu r e us i ng nuts f r om step 8
on p r ev i ous page .
S tep 4. C a r efu ll y r e i nsta ll f l ame senso r w i th gas k et and spa rk r od w i th gas k et and secu r e w i th sc r ews f r om step 7 on
p r ev i ous page . Reconnect w ir e ha r nesses to senso r and i gn i te r .
S tep 5 . Reconnect w ir e ha r nesses to b l owe r moto r and to gas va l ve .
S tep 6 . Reconnect PVC i nta k e vent i ng , gas supp l y and s i l i cone tu b i ng to gas va l ve . T u r n on gas to heate r and chec k
fo r gas l ea k s , r epa ir any gas l ea k s found .
S tep 7 . Resto r e 1 2 0 vo l t powe r supp l y to wate r heate r and conf ir m p r ope r ope r at i on fo ll ow i ng the l i ght i ng i nst r uct i ons
on the l i ght i ng i nst r uct i on l a b e l o r the l i ght i ng i nst r uct i on l ocated i n the i nsta ll at i on and ope r at i ng i nst r uct i on
manua l.
S tep 8 . Rep l ace su rr ound cove r on top of wate r heate r .
H eate r components may b e H O T when pe r fo r m i ng the fo ll ow i ng steps i n th i s p r ocedu r e . T a k e necessa r y p r ecaut i on
to p r event pe r sona l i n j u r y .
WARN I NG
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