Offset Vent Arrangement Condition 1; Offset Vent Arrangement Condition 2; Manual - A.O. Smith GDV Instruction Manual

Pull and connect the 3-1/8 in. (80mm) corrugated tube to
the water heater's fl ue tube reducer with hi-temp red silicone
(included) and gear clamp. Make sure this connection is tight
and leak proof.
*The sealant between 3-1/8 in. (80mm) corrugated tube and
water heater's fl ue tube reducer must be hi-temp red silicone or
other material suitable for 600°F (315°C) continuous service.
FIGURE 23
Apply hi-temp red silicone (included) around 6 in. (152mm) collar
on air manifold box. Pull corrugated vent tube all the way on to
collar and secure with one sheet metal screw (approx. 3/4 in.
(19mm) up from edge of vent tube. Pull gear clamp past screw
and tighten.
FIGURE 24
Check the level or slope of the venting again, and adjust if
required.
SLOPE
FIGURE 25
OFFSET VENT ARRANGEMENT
CONDITION 1:
Where a straight vent arrangement is impossible, a horizontal
90 degree maximum bend can be made. Use the water heater
casing outer diameter as a template to form the corrugated
tube.
TOP VIEW
CONDITION 2:
Where fl oor joists impede venting, a rise to complete the vent
termination is possible. All installations require 1 in. (25mm)
clearance to combustibles.
Note:
A. The maximum horizontal vent length of 80 in. (2.03m) minus
wall thickness should be considered when installing an offset
vent arrangement.
B. Do not combine condition 1 (Figure 26) with condition 2
(Figures 27 & 28) in the same installation.
C. The maximum allowable drop from vent center-line to vent
termination center-line (Figure 28) is 7.25 in. (184mm).
>1 in. (25mm)
68 in. (1.72m) FOR
40 gal. MODELS AND
50 gal. Hi-INPUT MODELS
>1 in. (25mm)
68 in. (1.72m) FOR
40 gal. MODELS AND
50 gal. Hi-INPUT MODELS
18
90° MAXIMUM
BEND
FIGURE 26
>1 in. (25mm)
WALL 10 in.
(254mm) (REF)
MINIMUM
76 in. (1.93m)
FOR 50 gal. AND
FIGURE 27
>1 in. (25mm)
7.25 in. (184mm)
WALL 10 in.
(254mm) (REF)
MINIMUM
76 in. (1.93m)
FOR 50 gal. AND
FIGURE 28
MAX