Direct Vent Installation of Vent/Air Piping
21
Combustion Air Adapter
1. The installer must clean and deburr pipe.
2. Prior to inserting the pipe, inspect the combustion air
adapter to verify there is no obstruction or packing
material inside the adapter.
3. Apply silicon to seal the pipe and to ease insertion
onto the adapter.
4. Insert the pipe onto the adapter until it is fully seated.
5. Secure the combustion air pipe with screw(s).
Vent Condensate Drain
A vent condensate drain and drain tube should be
installed near the appliance to prevent any potential con-
densate from entering the flue ways on the appliance. See
Figs. 6 and 10 through 11 pages 10 and 15 through 18.
Failure to provide a vent condensate drain close
to the appliance could allow acidic flue gas con-
densate to enter into the appliance flue ways
causing premature failure of the appliance.
Condensate Drain Tube
To prevent flue gases from entering into the building it is
important the drain tube is fashioned into a “pigtail” trap
as shown in Fig. 6 and 10 through 11 pages 10 and 15
through 18.
WARNING
The drain tube must be filled with water to prevent flue
gases from emitting into the building prior to operating
the appliance.
Periodically inspect the water level in the con-
densate drain tube. If low, add water as needed
to maintain trap level.
If water in drain tube evaporates rapidly due to ambient
conditions, propylene glycol may be added or substitut-
ed to reduce evaporation.
Pipe the condensate drain tube to a suitable place of
drainage or to a condensate pump or sump. Consult
local authorities regarding disposal of flue gas conden-
sate into public waste water system.
Vent Appliance Adapters - Direct Vent
The MODULATING DELTA requires the use of an appli-
ance adapter as approved by the one of vent manufac-
turers listed on page 8.
Failure to use an approved vent appliance
adapter may create improper vent connection
and potential flue gas leakage. Do not mix the
manufacturer appliance adapter with other man-
ufacturers’ vent components, the vent system
could fail or improperly seal, causing leakage of
flue products into the building.
1. Prior to installing the appliance adapter, inspect the
flue hood and verify there is no obstruction or pack-
ing material inside.
2. Ensure the appliance adapter banding strap is loose
prior to installation.
3.
Apply silicon as necessary to seal adapter to appli-
ance.
4.
Secure adapter to appliance by tightening adapter
banding strap.
WARNING
NOTICE
Termination Clearances of Direct Vent
System
Fig. 13:
