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PLEASE NOTE: EL22 IS FOR OUTDOOR PERMANENT INSTALLATIONS ONLY AND EL22-I IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL
AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE. PLEASE VISIT WWW.ECCOTEMP.COM/SUPPORT FOR MORE INFORMATION.
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Phone: 866-356-1992 | Email: [email protected] | Address: 315 - A Industrial RD Summerville, SC 29483
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Installing the EL22-I water heater, Continued....
Venting Lengths
MAXIMUM VENT LENGTH
Owner must refer to vent manufacturer’s instructions and specications. Z-Flex information can be
found at www.novaex.com, please refer to page 19 for additional links.
The system will not operate if there is excessive restriction
(pressure drop) in the venting system. A maximum of 32 feet 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 feet, and three elbows can be used with 22 feet of
vent pipe.
A 90° elbow is equivalent to 5 feet of straight pipe. A 45° elbow
is equivalent to 2 feet 6 inches 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 foot of horizontal run toward the vent terminal (see diagram
below). This ensures that any condensate formed during
operation of the unit 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 page 20 “Typical
Horizontal Termination w/ 1/4” per foot UPWARD Slope” or
page 14, “Standard Vertical Vent Termination” for examples).
Number of
90° elbows
(bends)
Maximum
Length of
Straight Pipe
1
2
3
32’
27’
22’
One (1) 90° Elbow is
Equivalent to 5 Feet of
Straight Pipe
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 illustration to the left)
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 proper
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.
12 in. minimum
EL22-I
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