Rheem 97MDV060 Series Installation Instructions Manual page 35

GENERAL VENTING REQUIREMENTS AND
DIRECT VENT (cont.)
OPTION 2: STANDARD HORIZONTAL DIRECT-VENT TERMINATION
FIGURE 18
STANDARD HORIZONTAL DIRECT VENTING
1) SUPPORT HORIZONTAL PIPE EVERY FOUR FEET.
2) WHEN 3" PIPE IS USED REDUCE TO 2" BEFORE
PENETRATING OUTSIDE WALL.
3) WHEN USING 3" Ø VENT AND NECKING DOWN TO
2" Ø AS REQUIRED, 18" (46cm) MAX. 2" DIA. PIPE MAY BE USED INSIDE THE WALL.
4) INCREASE THE 12" (31cm) MIN. (U.S.) ABOVE GRADE TO KEEP
TERMINAL OPENINGS ABOVE ANTICIPATED LEVEL OF SNOW ACCUMULATION
WHERE APPLICABLE. CANADA: TERMINATIONS MUST CONFORM TO CSA B149.10, SECT. 8.14.
5) DETAIL "B" INSTALL WIND DEFLECTOR VANE IN 2" PVC COUPLING IN VERTICLE
POSITION USING PVC SOLVENT.
6) THE COMBUSTION AIR TERMINATION MUST BE IN THE SAME PRESSURE ZONE AS
THE EXHAUST TERMINATION.
7) NO SCREENS MAY BE USED TO COVER COMBUSTION AIR OR EXHAUST.
8) NO T'S CAN BE INSTALLED AT THE TERMINATION.
OPTION 3: VARIANT OF STANDARD HORIZONTAL DIRECT-VENT TERMINATION
9) WALL PENETRATION AND VENT TERMINATIONS MUST BE WITH 2" Ø PIPE.
FIGURE 19
VARIANT OF STANDARD HORIZONTAL DIRECT-VENT TERMINATION
NOTE:
1) A TRAP IN THE COMBUSTION AIR PIPE IS NOT REQUIRED FOR THIS OPTION.
2) PIPING EXTERNAL TO THE STRUCTURE MUST BE INSULATED AS REQUIRED
FOR LOCAL CLIMATE
3) WALL PENETRATIONS AND VENT TERMINATIONS MUST BE WITH 2"
WHEN USING 3" VENT AND NECKING DOWN TO 2"
IMUM OF 18" OF 2"
TION) WHEN USING 3"
EXHAUST COUPLING
EXHAUST: COUPLING
U.S. MIN. 12" (31cm) ABOVE
GRADE OR ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION MUST A
CONFORM TO CSA
B149.1-10, SECT. 8.14
OPTION A ONLY
NOTE:
1) A TRAP IN THE COMBUSTION AIR PIPE
IS NOT REQUIRED FOR THIS OPTION.
2) PIPING EXTERNAL TO THE STRUCTURE
PIPE.
MUST BE INSULATED AS REQUIRED FOR
AS REQUIRED, A MAX-
LOCAL CLIMATE.
PIPE IS PERMITTED INSIDE (BEFORE THE PENETRA-
VENT.
REQUIRED
REQUIRED
INTAKE
INTAKE
CHOOSE
DETAIL APPLIES TO BOTH TERMINATIONS
DETAIL APPLIES TO BOTH TERMINATIONS
SEE DETAIL A
COUPLINGS: REQUIRED
ON EXTERIOR, OPTIONAL
ON INTERIOR
OR
EITHER
SHOWN
SHOWN
NOTE: This detail
applies to the ter-
mination and
NOT the penetra-
tion through the
wall.
U.S. MIN. 12" (31cm) ABOVE
GRADE OR ANTICIPATED AVG.
SNOW ACCUMULATION.
CANADA: TERMINATION MUST CONFORM
TO CSA B149.1-10, SECT. 8.14
GUIDELINES
9
SEE DETAIL B
FOR DIMENSION
BETWEEN INTAKE
AND EXHAUST
NOTE: This detail
applies to the ter-
mination and NOT
the penetration
through the wall.
B
OPTION B ONLY
NOTE:
1. A TRAP MUST BE INSTALLED IN
THIS OPTION TO PREVENT
WATER FROM ENTERING THE
EXHAUST COUPLING
FURNACE THROUGH THE COM-
REQUIRED
BUSTION AIR PIPE. ORDER KITS
RXGY-D05 FOR 2" PIPE OR RXGY-
D06 FOR 3" PIPE AND INSTALL
WIND VANE FROM
PER INSTRUCTIONS IN KIT.
FURNACE PARTS
BAG 2. PIPING EXTERNAL TO THE
STRUCTURE MUST BE INSU-
LATED FOR LOCAL CLI-
MATES.
INTAKE
5" Max. (13cm)
3" Min. (8cm)
B
ST-A1194-18-XO
FIGURE K &
DETAILS B & C
3. WALL PENETRATIONS
AND VENT TERMINA-
TIONS MUST BE WITH
2" PIPE. A MAXIMUM
OF 18" OF 2" PIPE
IS PERMITTED INSIDE
(BEFORE THE PENE-
TRATION) WHEN
USING 3" VENT.
ST-A1194-18-XO
FIGURES O, Q &
DETAIL C
35