AHRI (-)98VA060M317USA, Installation Instructions Manual

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37
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ntin
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OPTIONAL TERMINATION ANGLES FOR OPTION FOR ALT. HORIz. AND VARIANT OF ALT.
HORIz. DIRECT-VENT TERMINATIONS (OPTIONS 4 &5)
DIRECT VENT (cont.)
GENERAL VENTING REqUIREMENTS AND
GUIDELINES
FIGURE 22
1, 4
2
3
5
NOTE: These optional termination angles apply only to di-
rect-vent termination options 4 and 5 above (alternate hor-
izontal and variant of optional horizontal) in this section.
Do not use these angled terminations with any other ter-
mination option.
NOTE: This option is recommended for installations
where the distance from the vent pipe perpendicular to an-
other structure is less than 10 feet.
Top view for using 22° or 45° termination on a single fur-
nace.
Using alternate vent terminations from options 4 or 5
above, simply rotate the final elbows 22 or 45 degrees
from the wall as shown below.
1. Both the combustion air and exhaust final termination
elbows must be at the same angle and face the same
direction (left or right).
2. A wind vane must be installed in the combustion air
inlet pipe as shown in the diagram.
3. Number and distance between (recommended) sup-
port straps must provide rigid support.
4. Mark the final (22° or 45°) angles on the top of the ver-
tical risers and final elbows before gluing into place to
ensure that the final angles are correct.
5. Insulating the exhaust termination vertical riser may be
necessary in some areas, depending on the total
length and expected temperatures in the area.
6. Do not angle (22° or 45°) into an inside corner.
7. Do not use screens on the inlet or exhaust pipes.
8. Angled terminations cannot be used on pairs of vents.
9. This termination may cause discoloration over time to
the external surface of the structure.
10. Wall penetrations and vent terminations must be with
2”
B
pipe to reduce the possibility of ice forming at the
termination. A maximum of 18” of 2”
B
pipe is permit-
ted inside (before the penetration) when using 3”
B
vent.
ST-A1194-20