Eccotemp SHLX - Page 20

PLEASE NOTE: SH12
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A IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL AND ALL ECCOTEMP CONTENT IS SUBJECTED TO CHANGE WITHOUT NOTICE.
PLEASE VISIT SUPPORT.ECCOTEMP.COM FOR MORE INFORMATION.
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English
Installation
VENTING CONT.
MAXIMUM VENT LENGTH
Owner must refer to vent manufacturer’s instructions and specications. Z-Flex information can be found at www.
novaex.com and on PG. 23.
The system will not operate if there is excessive restriction (pressure
drop) in the venting system. A maximum of 32’ of vent pipe may be used
provided there is only one 90° elbow in the system. If additional elbows
are required: two elbows can be used with 27’, and three elbows can be
used with 23’ of vent pipe.
A 90° elbow is equivalent to 5’ of straight pipe. A 45° elbow is equivalent
to 2’6” of straight pipe.
The termination elbow does not count as an elbow when determining
total vent lengths.
The vent must be installed with a slight downward slope of 1/4” per ft.
of horizontal run toward the vent terminal (see diagram below). This
ensures that any condensate formed during operation of the water
heater is evacuated from the water heater.
A 1/4” per foot upward slope is acceptable when it is not possible to vent
with a downward slope, however, a UL approved Category III Stainless
Steel condensate trap MUST be installed at the beginning of the
horizontal run (See PG. 19 “Typical Horizontal Termination w/ 1/4” per
foot UPWARDS Slope” or PG. 23, “Standard Vertical Vent Termination”
for examples.)
One (1) 90° Elbow is
Equivalent to 5’ of
Straight Pipe.
Number of
90° elbows
(bends)
Maximum
Length of
Straight Pipe
1
2
3
32’
27’
22’
Vent Seam
Max. 2'
More than 6”
1/4” per ft.
Downward Slope
MINIMUM VENT LENGTH
The venting may be as short as 12”, provided
one vent termination is installed to the
outdoors through a sidewall, one 90° elbow
is included in the installation, and the wall
thimble is installed.
NOTICE! Make sure that the seam of
the vent pipe in horizontal runs is toward
the top of the installation (see diagram to
the left).
!
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DRAINING THE CONDENSATE
In certain conditions, installations in unconditioned space or having long horizontal or vertical runs may
accumulate condensate.
Condensate is known to be acidic; refer to local, state (provincial) or federal codes for propper handling methods.
In order to prevent condensate from draining back into the water heater, we recommend a condensate trap and
drain to be installed in a horizontal vent section as close as practical to the water heater vent connection.
Not following proper condensate procedures will void warranty.
Eccotemp recommends all termination hoods have a backow preventer to assist with freezing air. Consult with
an installation professional for proper installation.