PRESTIGE Excellence
HX Field Replacement
Kit
9
3. In case of limited top boiler clearance, insert vent
outlet adapter through the removed top jacket
panel. Bring this entire assembly in place togeth-
er on top of the boiler side panels. Use a slight
twist motion with a downward force as the vent
outlet adapter is inserted into the heat exchanger
adapter. Ensure the gasket remains seated in the
heat exchanger adapter. Secure the entire top jack-
et panel to the side panels with the original screws.
Install all DHW piping including T&P relief valve
to the DHW connections on the top of the boiler.
Open the DHW cold water isolation valve and test
for water leaks.
4. Install new vent outlet gasket provided in the kit
in vent outlet adapter. Ensure the combustion test
port of the vent outlet adapter is facing toward the
front of the boiler. Re-use the existing 4 mount-
ing screws and secure vent outlet adapter to top of
boiler jacket panel. (Fig. 12).
If during the install of the flue tube into the heat
exchanger the flue gasket becomes dislodged, it
is extremely important that the install is halted
and the gasket is reseated in the adapter. Failure
to comply could result in leakage of flue prod-
ucts into the surrounding area resulting in death
or personal injury.
Installation of Polypropylene Vent Outlet
Adapter
1. Ensure flue gasket is seated properly in the heat
exchanger adapter. Apply clean water to the bot-
tom of the internal vent pipe. (Fig. 11)
2. Insert the internal vent pipe into the heat
exchanger adapter. Use a slight twist motion
with a downward force as it is inserted into the
adapter. Ensure the gasket remains seated in the
heat exchanger adapter.
3. Ensure flue gasket is seated properly in the top of
the internal vent pipe. Apply clean water to the
bottom of the vent outlet adapter.
4. Install the vent outlet adapter on top of boiler
cabinet by twisting the vent outlet adapter clock-
wise to engage the retaining tabs. Ensure the flue
gasket remains seated in the internal vent pipe.
5. Install new vent outlet gasket provided in the kit
in vent outlet adapter. Ensure the combustion
test port of the vent outlet adapter is facing
toward the front of the boiler. (Fig. 12)
WARNING
Ensure Adapter
is Clean of All
Debris
Gasket
Fig. 12: Vent Outlet Adapter Gasket
Moisten
Gasket Prior
to Insertion of
Flue Tube
Ensure
Adapter is
Clean of All
Debris
Fig. 11: Heat Exchanger/Flue Tube Gasket
