Use & Care Manual

Installing the Water Heater
28
DO NOT use unequal diameters of pipe and fittings
for the vent and combustion air-inlet systems except
as defined previously.
NOTICE: The difference between the vent and
combustion air-inlet system equivalent lengths
must be no greater than 5 ft. (1.5 m).
Complete the installation of the remainder of the
combustion air-inlet system and attach it to the
combustion air-inlet connector fitting on the water
heater’s combustion air-inlet tube assembly.
Support vertical and horizontal lengths of the vent
and combustion air-inlet systems as previously men-
tioned.
IMPORTANT: Ensure that all the coupling clamps
are tight before allowing the water heater to operate.
WARNING: Do not operate the water
heater with the rain cap and elbows removed or
recirculation of combustion products may occur
and/or the vent and combustion air-inlet systems
could take in water, causing damage to the water
heater. Failure to follow this warning could result
in damage to the unit, improper operation, per-
sonal injury, or death.
-B-
-A-
-B-
d .008
d .010
Vent
#
Combustion Air-Inlet
Elbow
Short Piece of Pipe
3 in. (7.6 cm)
90° Street Elbow
Concentric Vent and /or Combustion Air-Inlet Pipe
Through Roof
# Min. 18 in. (46 cm)
Above Roof
and
Max. 24 in. (61 cm)
Above Roof
(Without Additional
Support)
Optional -
Condensate
Management Drain
Port*
-B-
-A-
-B-
d .008
d .010
Vent
Combustion Air-Inlet
Alternate Concentric Vent and /or Combustion Air-Inlet
Pipe Through Roof
Slope 1/8 in. per foot
(10 mm per m) towards
the water heater
#
#
Min. 18 in. (46 cm)
Above Roof
and
Max. 24 in. (61 cm)
Above Roof
(Without Additional
Support)
Optional -
Condensate
Management Drain
Port*
3 in. (7.6 cm)
90° Street Elbow
Short Piece of Pipe
Elbow
*See Condensate Management Section for
additional information about optional piping.
Vertical Vent - Alternate Concentric Terminal Installation continued