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Installing the SH22i Water Heater, Continued...
Venting Lengths
MAXIMUM VENT LENGTH
Owner must refer to vent manufacturer's instructions and specifications. Z-Flex information can be
found at www.novaflex.com.
Number of
Number of
90° elbows
90° elbows
(bends)
(bends)
1
2
3
One (1) 90° Elbow is
One (1) 90° Elbow is
Equivalent to 5 Feet of
Equivalent to 5 Feet of
Straight Pipe
Straight Pipe
Vent Seam
PLEASE NOTE: SH22 IS FOR OUTDOOR PERMANENT INSTALLATIONS ONLY AND SH22I IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL
AND ALL ECCOTEMP CONTENT IS SUBJECT TO CHANGE WITHOUT NOTICE. PLEASE VISIT SUPPORT.ECCOTEMP.COM FOR MORE INFORMATION.
28
Support: Support.Eccotemp.com
Support: Support.Eccotemp.com
The system will not operate if there is excessive restriction
The system will not operate if there is excessive restriction
(pressure drop) in the venting system. A maximum of 32 feet of
(pressure drop) in the venting system. A maximum of 32 feet of
Maximum
vent pipe may be used provided there is only one 90° elbow in
vent pipe may be used provided there is only one 90° elbow in
Length of
the system. If additional elbows are required: two elbows can be
the system. If additional elbows are required: two elbows can be
Straight Pipe
used with 27 feet, and three elbows can be used with 22 feet of
used with 27 feet, and three elbows can be used with 22 feet of
vent pipe.
vent pipe.
A 90° elbow is equivalent to 5 feet of straight pipe. A 45° elbow
A 90° elbow is equivalent to 5 feet of straight pipe. A 45° elbow
32'
32'
32'
is equivalent to 2 feet 6 inches of straight pipe .
is equivalent to 2 feet 6 inches of straight pipe .
The termination elbow does not count as an elbow when
The termination elbow does not count as an elbow when
27'
27'
27'
determining total vent lengths.
determining total vent lengths.
The vent must be installed with a slight downward slope of 1/ 4"
The vent must be installed with a slight downward slope of 1/ 4"
per foot of horizontal run toward the vent terminal (see diagram
per foot of horizontal run toward the vent terminal (see diagram
22'
22'
22'
below). This ensures that any condensate formed during
below). This ensures that any condensate formed during
operation of the unit is evacuated from the water heater.
operation of the unit is evacuated from the water heater.
A 1/4" per foot upward slope is acceptable when it is not
A 1/4" per foot upward slope is acceptable when it is not
possible to vent with a downward slope, however, a UL approved
possible to vent with a downward slope, however, a UL approved
Category III Stainless Steel condensate trap MUST be installed
Category III Stainless Steel condensate trap MUST be installed
at the beginning of the horizontal run (See page 22 "Typical
at the beginning of the horizontal run (See page 22 "Typical
Horizontal Termination w/ 1/4" per foot UPWARD Slope" or
Horizontal Termination w/ 1/4" per foot UPWARD Slope" or
page 16, "Standard Vertical Vent Termination" for examples).
page 16, "Standard Vertical Vent Termination" for examples).
1/4" per foot
downward slope.
12 in.
Minimum
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MINIMUM VENT LENGTH
The venting may be as short as 12",
provided one vent termination is
installed to the outdoors through a
More than 6"
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).
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Phone: 866-356-1992
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