State GPH-90N - Manual (Page 27)

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VENT PIPING TO BE
SLOPED (DOWN)
TOWARD HEATER
TO PREVENT WATER
FROM COLLECTING.
6 in. (15 cm)
MIN. LENGTH
ATTACH 45°
TERMINATION
ELBOW
RODENT
SCREEN
(INSTALL
INTO
ELBOW)
SEALANT
12 in.
(30 cm) min.
* WHERE SNOW COVER IS NORMAL DURING WINTER, ENSURE SUFFICIENT
VENT CLEARANCE TO PREVENT BLOCKAGE OR ICE BUILDUP.
SEALANT
GROUND
LEVEL*
FIGURE 25
INSTALLATION OF VENT SYSTEM, SIDEWALL
With the route of the venting system and selection of
materials completed, as discussed in the section of this
manual titled “Planning The Vent System”, the through the
wall vent terminal in place and the fi rst section of piping,
up to fi rst elbow, installed at the rubber coupling, it is time
to complete the installation of the venting system for the
sidewall installation.
FIGURE 26
VENT
PIPING TO
BE SLOPED
(DOWN)
TOWARD
HEATER TO
PREVENT
WATER FROM
COLLECTING.
VENT
RISER
ATTACH 45°
TERMINATION
ELBOW
RODENT
SCREEN
(INSTALL
INTO
ELBOW)
SEALANT
12 in.
(30 cm) min.
SEALANT
GROUND
LEVEL*
* WHERE SNOW COVER IS NORMAL DURING WINTER,
ENSURE SUFFICIENT VENT CLEARANCE TO PREVENT
BLOCKAGE OR ICE BUILDUP.
BRACKET
EQUIVALENT
VENT LENGTH
MEASURED
FROM THIS
POSITION
FIGURE 27
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
fi ttings in the “Vent Pipe Preparation” section.
It is recommended that the completion of the venting
system start at the rubber coupling and run to the coupling
on the inside wall of the vent terminal (see Figure 23).
The vent system piping should be supported every
5 ft. (1.5m) of vertical run and every 3 ft. (91cm) of
horizontal run. All piping and fi ttings must be joined by
the proper procedures as described under: VENT PIPE
PREPARATION.
INSTALLATION OF VERTICAL VENT SYSTEM
A proper fl ashing or “BOOT” should be used to seal the
pipe where it exits the roof. The total vent system should
not exceed the equivalent feet of pipe as listed in Table
1.
Provide support for all pipe protruding through the roof. All
piping should be properly secured. The vent system piping
should be supported every 5 ft. (1.5m) of vertical run and
every 3 ft. (91cm) of horizontal run. All piping and fi ttings
must be joined by the proper procedures as described
under: VENT PIPE PREPARATION.