Rheem GHE100-130 Use & Care Manual page 12

Min. 24"
Max. 36"
Inlet
Figure 4
Vent Pipe
Vent Pipe
Pipe &
Coupling
From Water
Heater
Figure 5 – Typical horizontal Vent installation
Additional Considerations (See Figure 9 & 10)
1. Do Not install vent terminals under any patio or deck.
2. To help prevent moisture from freezing on walls and under eaves, do
not locate outlet vent terminal on the side of a build ing with prevailing
winter winds.
3. Do Not terminate vent pipe directly on brick or masonry surfaces. Use
a rust-resistant sheet metal backing plate behind vent. (See Figure 5.)
4. Do Not locate vent terminal too close to shrubbery, since flue gases
may damage them.
5. Caulk all cracks, seams and joints within six (6) (1.83 m) feet of vent
terminal.
6. All painted surfaces should be primed to lessen the chance of physical
damage. Painted surfaces will require maintenance.
7. Insulate vent pipe exposed to cold conditions (attics, crawl spaces,
etc.) to help prevent moisture from accumulating in vent pipe.
8. This water heater requires its own separate venting system. DO NOT
connect the exhaust vent to an existing vent pipe or chimney.
WARNING
!
moisture in the flue gas will condense as it leaves the
vent terminal. in cold weather this condensate can
freeze on the exterior wall, under the eaves and on
surrounding objects. Some discoloration to the
exterior of the building is to be expected. however,
improper location or installation can result in se-
vere damage to the structure or exterior finish of the
building.
installation
Outlet
Sheet Metal Shield on Brick
or Masonry Walls
Vent Terminal with / "
1
2
Mesh Protective
Screen Inside
Outside of
Building Wall
12
HORIZONTAL VENT INSTALLATION – Once the vent terminal
location has been determined, make a hole through the exterior wall to
accommodate the vent pipe. Vent pipe must exit exterior wall horizontally
only (See Figure 5).
Insert a small length of vent pipe through the wall and connect the
coupling as shown in Figure 5. Connect terminal as shown to the vent
pipe on the exterior of the building. Seal any opening around the vent
pipe or fittings with mortar or silicone caulk as shown in Figure 5.
Complete the rest of the vent pipe installation to the water
heater's vent connector fitting on the blower outlet. If
necessary support horizontal run as previously mentioned.
*Min. 12" Above Roof
or
Min. 12" Above Anticipated
Snow Level.
Elbows
Max. 24" Above Roof
(Without Additional Support)
Figure 6 – Vertical Vent Terminal location
VERTICAL VENT INSTALLATION – Once the vent termi-
nal location has been determined, make a hole through the
roof and interior ceiling to accommodate the vent pipe. Com-
plete the vent pipe installation to the water heater's vent
connector fitting on the blower outlet. Support vertical or
horizontal runs as previously mentioned.
Install adequate flashing where the vent pipe passes through the
roof. Determine the vent terminal height and cut vent pipe accord-
ingly. Refer to Fig. 8 for proper vent terminal height. Connect vent
elbow onto vertical pipe through roof. Connect short piece of vent
pipe (approximately 3" (7.6 cm) long) to elbow, then join terminal
to the short piece of vent pipe.
VERTICAL VENT TERMINAL LOCATION – The location of
vertical vent terminal depends on the following considerations
(see Figure 6):
1. Minimum twelve (12 inches) (30.5 cm) above roof 18" inches (46
cm) for Canada.
2. Minimum twelve (12 inches) (30.5 cm) inches above anticipated snow
level.
3. Maximum twenty-four (24 inches) (61 cm) inches above roof level without
additional support for vent pipe.
4. Four (4) feet (1.22 m) from any gable, dormer or other roof structure
with building interior access (i.e., vent, window, etc.).
5. Ten (10) feet (3.05 m) from any forced air inlet to the building.
Any fresh or make-up air inlet such as a dryer or furnace area is
considered to be a forced air inlet.
6. Vent Terminals are a minimum of twenty-four (24) inches (61 cm) and
a max of 36" horizontally apart.
VENT INSTALLATION – Before proceeding, make certain you
understand the procedure and cautions covered in the section
"Joining Pipes and Fittings."
Short Piece of Vent Pipe
Vent Pipe
Through Roof
* Min of 18" for Canada