12
5. The blower discharge boot is made to accept only straight
sections of 3" pipe. To start off with an elbow, a short section
of the furnished pipe, a minimum of 2 inches (5.1 cm), must
be cut and glued into the end of the elbow that will mount on
the discharge boot (see figure 6).
INSTALLATION OF VENT SYSTEM, SIDEWALL
With the route of the venting system and selection of materials
completed, as discussed in section of this manual titled PLANNING
THE VENT SYSTEM, the through the wall vent terminal in place
and the first section of piping, up to first elbow, installed at the
blower it is time to complete the installation of the venting system
for the sidewall installation.
FIGURE 8
Before completing the installation of the venting system be sure
to read the sections of this manual discussing the proper method
of cutting and cementing PVC pipe and fittings: VENT PIPE
PREPARATION.
It is recommended that the completion of the venting system start
at the blower assembly and run to the coupling on the inside wall
of the vent terminal, Figure 5.
The vent system piping should be supported every 5 feet (1.5 m)
of vertical run and every 3 feet (91 cm) of horizontal run. All piping
and fittings must be joined by the proper procedures as described
under: VENT PIPE PREPARATION.
INSTALLATION OF VERTICAL VENT SYSTEM
This unit is approved for venting through the roof with only the
vent terminal that is included with the unit, see Figure 9. A proper
flashing or "BOOT" should be used to seal the pipe where it exits
the roof. The total vent system should not exceed the thirty (30)
equivalent feet (9.1 equivalent meters) of 3 inch pipe or one-
hundred (100) equivalent feet (30.5 equivalent meters) of 4 inch
pipe as listed in Table 1.
NOTE:
The equivalent length of pipe listed above are exclusive
of the "45° Elbow" termination with installed screen.
Provide support for all pipe protruding through the roof. All piping
should be properly secured. The vent system piping should be
supported every 5 feet (1.5 m) of vertical run and every 3 feet
(91 cm) of horizontal run. All piping and fittings must be joined
by the proper procedures as described under: VENT PIPE
PREPARATION.
FIGURE 9
IMPORTANT
The vent system must terminate so that proper clearances are
maintained as cited in local codes or the current edition of the
Natural Gas and Propane Installation Code CAN/CSA B149.1
and as listed below:
1. Vent Termination must extend a minimum of 12 inches
(30 cm) above roof or 12 inches (30 cm) above the anticipated
snow level to prevent blockage of the vent termination. Also
see Figure 3.
VENT PIPE PREPARATION
1.
INITIAL PREPARATION
A. Make sure the solvent cement you are planning to use is
designed for the specific application you are attempting.
B. Know the physical and chemical characteristics and limitations
of the PVC and CPVC piping materials that you are about to
use.
C. Know the reputation of your manufacturer and their products.
D. Know your own qualifications or those of your contractor. The
solvent welding technique of joining PVC and CPVC pipe is a
specialized skill just as any other pipe fitting technique.
E. Closely supervise the installation and inspect the finished job
before start-up.
