Rheem 96v series Installation Instructions Manual page 53

GENERAL VENTING REQUIREMENTS AND
NON-DIRECT VENT (cont.)
B. USING OUTDOOR AIR FOR COMBUSTION:
IMPORTANT: Do not take air from an attic space that is
equipped with power ventilation.
The confined space must communicate with the outdoors in
accordance with Methods 1 or 2 below. The minimum dimen-
! !
sion of air openings shall not be less than 3 inches. Where
! !
ducts are used, they shall be of the same cross-sectional
METHOD 1:
area as the free area of the openings to which they connect.
!
!
Two permanent openings, one located within 12 inches of the
top and one located within 12 inches of the bottom of the
enclosure, shall be provided. The openings shall communicate
! !
directly, or by ducts, with the outdoors or spaces (crawl or
attic) that freely communicate with the outdoors.
!
',9-%*DF**0(&(0/0*E+%%*,+%,*+%./(+%2*
T BLE 9: MINIMUM FREE RE REQUIRED
E8+*%,7?*8:%&(&)*GJ?%&*'J8*8:%&(&)1*
FOR E CH OPENING (WHEN TWO OPENINGS
,+%*/1%2H*J('?*,*E/+&,7%F**************************
RE USED) WITH
!;**-87,'%2*(&*,*78&E(&%2*1:,7%*****************
1. LOC TED IN CONFINED SP CE
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&****************************************************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE THROUGH N OPENING OR
8/'1(2%*'?+8/)?*,&*8:%&(&)*8+*
3. THROUGH VERTIC L DUCT.
'?+8/)?*,*$%+'(7,-*2/7';*
EUTT*,UTR*h\U*
'\SRW*(][cS*h\U* %RYZ*8[T]V]^*
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T BLE 10: MINIMUM FREE RE REQUIRED
',9-%*!IF**0(&(0/0*E+%%*,+%,*+%./(+%2*
! ! ! !
FOR E CH OPENING (WHEN TWO OPENINGS
E8+*%,7?*8:%&(&)*GJ?%&*'J8*8:%&(&)1*
! ! ! ! !
! ! ! !
RE USED) WITH
,+%*/1%2H*J('?*,*E/+&,7%F***************************
! ! ! ! !
1. LOC TED IN CONFINED SP CE
!;**-87,'%2*(&*,*78&E(&%2*1:,7%***************** ! ! !
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&****************************************************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE THROUGH
8/'1(2%*'?+8/)?*,*?8+(=8&',-*2/7';*
EUTT*,UTR*h\U*
'\SRW*(][cS*h\U* %RYZ*8[T]V]^*
,--*)RX* iZT]*"*1T[RURST*
,[[WVR]YTX* 8[T]V]^X*RUT*
G9'/?H* cXTe*GXb*V]YZTXH*
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FURN CE:
+\c]e*:V[T*2cYS*
2VR_TSTU*G$TUSVYRW*
2cYS*8]WaH*GV]YZTXH*
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OF! F!
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FURN CE:
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HORIZONT L DUCT.
+\c]e*:V[T*2cYS*
2VR_TSTU*
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A. Where directly communicating with the outdoors through
vertical ducts as shown in Figure 14, each opening shall have
an opening or where communicating to the outdoors through
a minimum free area of 1 square inch for each 4,000 BTUH of
Table 9 below specifies the minimum area for
total appliance input rating of all equipment in the enclosure.
the 2 combustion air openings and minimum round duct diam-
eter for direct openings and vertical ducting only.
& ! !
B. Where communicating with the outdoors through horizontal
& ! !
! ! !
ducts, each opening shall have a minimum free area of 1
ing of all equipment in the enclosure (see Figure 15). Table !
! !
square inch for each 2,000 BTUH of total appliance input rat-
10 specifies the minimum area for each of the 2 combustion
!
!
!
! ! !
! !
air openings and minimum round duct diameter for horizontal
METHOD 2:
ducting only.
! !
& ! !
! !
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! ! !
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!
One permanent opening located within 12 inches of the top
! !
!
T BLE 11: MINIMUM FREE RE REQUIRED ',9-%*!!F**0(&(0/0*E+%%*,+%,*+%./(+%2*
! ! !
!
FOR N OPENING (WHEN ONE OPENING IS E8+*,&*8:%&(&)*GJ?%&*8&%*8:%&(&)*(1*
! !
! USED) WITH ! !
/1%2H*J('?*,*E/+&,7%F******************************************************
!
1. LOC TED IN
!;**-87,'%2*(&*,*78&E(&%2*1:,7%*****************
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&*******************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE.
8/'1(2%;*
'\SRW*(][cS*h\U*
,--*)RX*
,[[WVR]YTX*
G9'/?H*
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FIGURE 13
!
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NON-DIRECT VENT
!
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AIR FROM
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HEATED
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SPACE
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GUIDELINES
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CONFINED SP CE
EUTT*,UTR*h\U*R]*
8[T]V]^*iZT]*!*
8[T]V]^*VX*cXTe* +\c]e*:V[T*2cYS*
GXb*V]YZTXH* 2VR_TSTU*GV]YZTXH*
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each of
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ST-A1194-19
FIG C
53