Noritz EZTR50 - Heat Exchanger Assembly and Rejoining; Replace Primary SS HEX

Heat Exchanger Replacement Procedure
Diagram
11.Replace Primary SS HEX
(1) Attach Water Connector - Elbow and "C" Clamp
to new Primary SS HEX.
In that case, exchange O ring - High Temp P16 of
Water Connector - Elbow for a new one.
(NCC199CDV ONLY)
Attach Pipe - Primary SS HEX Connection
with 2 "C" Clamps to new Primary SS HEX.
In that case, exchange O rings - High Temp P16 of
Pipe - Primary SS HEX Connection for new ones.
(2) Only EZ111DV/EZ98DV or NCC199CDV
Attach 2 Freeze Prevention Heaters to new
Primary SS HEX with 2 Clamps.
(3) Exchange 2 Gasket - Primary Heat Exchangers
for new ones.
12.Join Primary SS HEX and Burner Chamber
(1) Peel off old Gasket- Burners and replace it
with new Gasket - Burner.
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Procedure
(1)
(1)
EZ111DV
(3)
e.g. EZ111DV
(2)
NC199CDV
(1)
Attach in the center of the line