Rheem *96V series, Installation Instructions Manual

Page: 51 / 124

Vent terminations for both Non-Direct and Direct-Vent in-
stallations must adhere to guidelines specified by the lat-
est edition of ANSI Z21.47
Gas-Fired Central Furnaces
.
These are clearly detailed in
Figure 21
for Non-Direct-
Vent installations and
Figure 32
for Direct-Vent installa-
tions. In addition to these requirements, the installation
and venting must also comply with the National Fuel Gas
Code (U.S.) and CSA-B149.1; Canadian Natural Gas and
Propane Installation Code (Canada) and the following re-
quirements must also be met:
NOTE:
Screens of any kind on the inlet or exhaust pipes
are not permitted and will void the manufacturer’s war-
ranty.
In addition to the requirements shown in
Figure 21
for
Non-Direct venting and
Figure 32
for Direct-Venting, the
vent must be installed with the following minimum clear-
ances:
1. The vent terminal shall have a minimum horizontal
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
2. Locate the furnace combustion air inlet a minimum of 3
feet from the vent of any other gas or fuel-burning ap-
pliance or clothes dryer to prevent recirculation of the
flue gases into the furnace combustion air inlet. The
only exception to this requirement is the case of multi-
venting two or more furnaces, which is covered in the
section on multiventing of these instructions.
In addition to the minimum clearances listed above and in
Figure 21
(Non-Direct Vent) and
Figure 32
(Direct-Vent),
the vent location should also be governed by the following
guidelines.
1. Avoid terminating under any kind of patio or deck. How-
ever, if necessary, vent piping may be installed under a
deck as long as the termination(s) is (are) not under the
deck.
2. If installing the vent under a deck, insulate it to insure
that no condensate freezes and blocks the pipes.
3. Do not terminate in any area or behind any obstruction
that may allow the flue products to become stagnant
and/or re-circulate.
4. Do not locate on the side of a building with prevailing
winter winds. This will help prevent moisture from
freezing on the walls and overhangs (under eaves).
5. If extending vent through a brick or masonry surface, a
sleeve between the wall and venting is suggested to
protect against damage from thermal expansion and
contraction.
6. A corrosion-resistant sheet metal or plastic backing
plate installed on the wall behind the vent is suggested
to prevent exhaust gases and condensate from con-
tacting the wall.
7. Avoid locating too close to shrubs as condensate may
stunt growth or kill them.
TERMINATION REQUIREMENTS
!
CAUTION
THE COMBUSTION PRODUCTS AND MOISTURE
IN THE FLUE GASES WILL CONDENSE AS THEY
LEAVE THE TERMINATION. THE 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 FINISH DAMAGE TO THE BUILDING
AND MAY RE-CIRCULATE THE PRODUCTS OF
COMBUSTION INTO THE COMBUSTION AIR TER-
MINAL AND FREEZE.
51
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
Ve
ntin
g