Service Manual

UPDX Series
Page 39
Installation of Inner Door
With Gasket.
WARNING
Stripped fastener connections may allow
for seal breach of innerdoor. A seal
breach mayresult in a fireor explosion
causing propertydamage, personal injury
ordeath. Do not over tighten screws in
steps 14, 16 and 17.
If a fastener connection is stripped,
contact the manufacturer listed on the
water heaterrating plate.
Step 13.
Clean any residual gasket residue or other debris
from combustion chamber surface before
installing the inner door/gasket assembly.
Step 14. Place the burner door into position first. Tighten
the feed line nut to the gas valve. Use the ¼” hex
drive screw without the built-in washer to secure
the right side of the burner door to the chamber.
Use the ¼” hex drive screws with the built-in
washer to secure the left side of the burner door in
place. DO NOT OVER TIGHTEN SCREWS.
Inner Door Gasket Replacement
Procedure.
WARNING
If the information in these instructions is not
followed exactly, afireor explosion mayresult causing
propertydamage, personal injury ordeath.
Step 11. After inspection of inner door as noted in step 10, completely remove gasket and adhesive residue from
burner and left side inner doors as needed.
Step 12. Use RTV sealant (recommended bead size1/8") to secure the inner door gasket to the inner door sections
(right & burner). The burner door gasket must be sliced in the location shown on the illustration below in
order to slide the gasket over the burner venturi. Refer to illustration below for proper RTV sealant
application. Note the overlap configuration in the flange area of the inner door. Set the flange section first, this
will help to achieve the proper over lap position.
UPDX SERVICE PROCEDURE XV
Inner Door/Gasket Removal, Inspection
Replacement and Reinstallation
39