Chimney & Vent Pipe Connections - RBI Series 8800 Installation And Operation Manual

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WARNING: Never operate the boiler/water heater
in an environment subjected to a negative
pressure. This can result in excessive levels of
carbon monoxide causing severe personal
injury or death!
All Air From Inside The Building
If the boiler/water heater is to be located in a confined
space minimum clearances of 24" (610 mm) must be
maintained between the boiler/water heater and any
combustible construction. When installed in a confined
space two permanent openings communicating with an
additional room(s) are required. The combined volume
of these spaces must have sufficient volume to meet the
criteria for an unconfined space. The total air
requirements of all gas utilization equipment, fireplaces,
wood stoves or any type of exhaust fan must be
considered when making this determination. Each
opening must have a minimum free area of
2
1 in /1000 Btu/hr (2200 mm
input rating of ALL gas utilization equipment in the
confined area.Each opening must be no less than
100 square inches (64516 mm
opening must be within 12 inches (300 mm) of,
but not less than 3 inches (80 mm) from, the top of
the enclosure. The bottom opening must be within
12 inches (300 mm) of, but not less than 3 inches
(80 mm) from, the bottom of the enclosure.
All Air From Outside The Building
When installed in a confined space two permanent
openings communicating directly with, or by ducts to,
the outdoors or spaces that freely communicate with the
outdoors must be present. The upper opening must be
within 12 inches (300 mm) of, but not less than 3 inches
(80 mm) from, the top of the enclosure. The bottom
opening must be within 12 inches (300 mm) of, but not
less than 3 inches (80 mm) from, the bottom of the
enclosure.
Where directly communicating with the outdoors or
communicating with the outdoors through vertical ducts,
each opening shall have a minimum free area of 1 in2/
4000 Btu/hr (550 mm2/kW) of the total input rating of
all of the equipment in the enclosure.
Where communicating with the outdoors through
horizontal ducts, each opening shall have a minimum
free area of 1 in2/2000 Btu/hr (1100 mm
total input rating of all of the equipment in the enclosure.
When ducts are used, they must have the same cross-
sectional area as the free area of the opening to which
they connect.
SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
2
/kW) based on the total
2
) in size. The upper
2
/kW) of the
When calculating the free area necessary to meet the
make-up air requirements of the enclosure,
consideration must be given to the blockage effects
of louvers, grills and screens. Screens must have a
minimum mesh size of 1/4" (6.4mm). If the free area
through a louver or grill is not known ducts should be
sized per Table 2 below.
Table 2 - Make-up Air Duct Sizing
Required Cross Sectional Duct Area in2 (cm
Input 1/4" (6.4 mm)
(MBH) Wire Screen
420 105 (677)
530 133 (858)
630 158 (1019)
735 184 (1187)
840 210 (1355)
950 238 (1535)
1050 263 (1697)
1160 290 (1871)
1260 315 (2032)
1370 343 (2213)
1470 368 (2374)
1580 395 (2548)
1685 421 (2716)
1790 448 (2890)
1900 475 (3065)
2000 500 (3226)
2400 600 (3871)
2800 700 (4516)
3200 800 (5161)
3600 900 (5806)
4000 1000 (6452)
CHIMNEY & VENT PIPE
CONNECTIONS
WARNING: The vent installation must be in
accordance with Part 7, Venting of Equipment,
of the National Fuel Gas Code, ANSI Z223.1-
latest revision or applicable provisions of the
local building codes. Canadian installations
must comply with CAN/CGA B149.1 or .2
Installation Code. Improper venting can result in
excessive levels of carbon monoxide which can
result in severe personal injury or death!
Chimney Inspection & Sizing
If this boiler/water heater will be connected to a masonry
chimney, a thorough inspection of the chimney must be
performed. Ensure that the chimney is clean, properly
constructed and properly sized. Table 3 lists the
equivalent breeching and flue sizes required for the
boiler/water heater.
Metal Wooden
Louvers Louvers
140 (903) 420 (2710)
177 (1142) 530 (3419)
210 (1355) 630 (4064)
245 (1581) 735 (4742)
280 (1806) 840 (5419)
317 (2032) 950 (6129)
350 (2258) 1050 (6774)
387 (2497) 1160 (7484)
420 (2710) 1260 (8129)
457 (2948) 1370 (8839)
490 (3161) 1470 (9484)
527 (3400) 1580 (10,194)
562 (3626) 1685 (10,871)
597 (3852) 1790 (11,548)
633 (4084) 1900 (12,258)
667 (4303) 2000 (12,903)
800 (5161) 2400 (15,483)
933 (6019) 2800 (18,064)
1067 (6884) 3200 (20,645)
1200 (7742) 3600 (23,226)
1333 (8600) 4000 (25,806)
2 )