Burnham PVG - Manual (Page 19)

19
1. Do not exceed maximum vent lengths. Refer to
Table 4.
2. This installation will allow a maximum of seven
(7) feet vertical exterior run of the vent piping to be
installed .
NOTICE
Exterior run to be included in equivalent vent
lengths.
3. Install vent piping.
a. Install vent piping for desired venting system.
Refer to specific section for details for vent pipe
installation.
F.
Optional Exterior Separate Horizontal Vent Terminal Mounting – See Figure 9.
b. After penetrating wall/thimble, install an
AL 29-4C ® 90° elbow so that elbow leg is in the
up direction.
c. Install maximum of five (5) feet of AL 29-4C ®
vent pipe. Refer to Sections C through E for
proper procedures for joining vent pipe and
fittings.
d. Install AL 29-4C ® 45° elbow to upper AL 29-4C ®
90° elbow so that leg of 45° is in down direction
(see Figure 9).
f. Install vent terminal.
g. Brace piping if required.
Figure 9: Horizontal Vent Terminal Installation (3” Vent [left view] or 4” Vent [right view])