Rheem GHE119SS Use & Care Manual page 13

Figure 6
Vent Pipe
Pipe &
Vent
Coupling
Pipe
To the Water Heater
Figure 7 – Typical Horizontal Vent Installation
Additional Considerations (See Figures 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 7.)
4. DO NOT locate vent terminal too close to shrubbery,
since flue gases may damage them.
5. Caulk all cracks, seams and joints within 6 feet
(1.83 m) of vent terminal.
6. All painted surfaces should be primed to lessen the
chance of physical damage. Painted surfaces will
require maintenance.
7. Make sure that all vent pipes exposed to cold
conditions (attics, crawl spaces, etc.) have the
proper slope and support to keep moisture from
accumulating in the vent pipes. NOTE: Insulating of
non-metallic vent materials is prohibited.
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 severe
damage to the structure or exterior finish of the
building. In locations with extended amounts of time
with temperatures under 40°F. (4°C.) and/or prevailing
wind toward the outlet vent, make sure that the outlet
Installation
Min. 24"
Max. 36"
Inlet Outlet
Sheet Metal Shield on
Brick or Masonry Walls
Elbow can be a maximum
of 1 inch from the wall.
Inlet Vent Terminal
with / " Mesh Pro-
1
2
tective
Screen Inside
Outside of the
Building Wall
vent terminal is at least 2 feet (0.61 m) away from any-
thing that can be damaged by the condensate
HORIZONTAL VENT INSTALLATION – Once the vent terminal
location has been determined, make a hole through the
exterior wall to accommodate the vent pipe. The vent
pipe must exit the exterior wall horizontally only (See
Figure 7).
Insert a small length of vent pipe through the wall, and
connect the coupling as shown in Figure 7. Connect the
vent 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
7.
Complete the rest of the vent pipe installation to the
water heater's vent connector fitting on the blower
outlet. If necessary, support the horizontal run of pipe
as previously mentioned.
*Min. 12"(30.5 CM) Above
Roof or
Min. 12"(30.5 CM) Above
Anticipated Snow Level.
Max. 24"(61 cm) Above
Roof (Without Additional
Support)
Figure 8 – Vertical Vent Terminal Location
VERTICAL VENT INSTALLATION – Once the vent
terminal location has been determined, make a
hole through the roof and interior ceiling to
accommodate the vent pipe. Complete 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 the vent pipe accordingly.
Refer to Figure 8 for the proper vent terminal
height. Connect the vent elbow onto the verti-
cal pipe through the roof. Connect a short piece
of vent pipe (approximately 3" (7.6 cm) long) to
the elbow, and, then, join the vent terminal to the
short piece of vent pipe.
VERTICAL VENT TERMINAL LOCATION – The location
of the vertical vent terminal depends on the following
considerations (see Figure 8):
1. Minimum 12" (30.5 cm) above the roof 18" (46 cm) for
Canada.
2. Minimum 12" (30.5 cm) inches above anticipated
snow level.
3. Maximum 24" (61 cm) above roof level without addi-
tional support for vent pipe.
4. 4 feet (1.22 m) from any gable, dormer or other roof
structure with building interior access (i.e., vent, win-
dow, etc.).
5. 10 feet (3.05 m) from any forced air inlet to the build-
ing. 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 24" (61 cm) and a
maximum of 36" horizontally apart.
13
Short Piece of Vent
Pipe
Vent Pipe
Through Roof
Elbows
* Min of 18"(46cm) for Canada