Bradford-White Corp U1TW40S*FRN ユーザーズマニュアル

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Step 6. 

Remove the connectors attached to the re-

settable thermal switch on the manifold mount. 

Inner Door Removal Procedure (cont’d)
Step 7. 

Remove the flammable vapor sensor from the clip by 

pushing down on the tab to open the clip.

Step 8. 

Inspect both inner doors for any of the following imperfections: tears,

missing material, cracks, dirt or debris, lack of adhesion to the inner door, material left 

on combustion chamber, or any other imperfections that will inhibit a proper seal. 
If any of the imperfections above are present, 

replace  the  inner 

door gasket following the Inner Door Gasket 
Replacement Procedure.  If not, replacement 
of the inner door gaskets is not necessary. 
Inner Door Gasket Replacement Procedure 
Step 1. 

Completely remove all gasket and adhesive 

residue from the right and left side inner doors, as needed. 

Step 2. 

U s i n g 

RTV sealant, 
apply a 1/8” 
bead to secure 

t h e

Flammable vapor 

sensor

Flammable vapor 

sensor clip

If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, 
personal injury, or death. 

Recommended pattern for RTV sealant 

Expanded view 

Slice gasket here to slide over burner venturi

Gasket overlap must be 

as shown ± 1/32 

Enlarged

view of

flange

area

Gasket overlap must be 

as shown ± 1/32 

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