Camplux WA686M-NG, Use & Care Manual

Page: 47 / 84

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).
Minimum vent length
The venting may be as short as 35”, 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).
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, please refer to page 48 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.
Number of 90° elbows (bends)
1
2
3
Maximum Length of Straight Pipe
32’
27’
22’
One (1) 90° Elbow is Equivalent to 5 Feet of Straight Pipe
45
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