Crown Boiler BWF061 - Manual (Page 10)

9
VI Venting
There are three basic ways to vent the BWF boiler:
• Horizontal (“side wall”) venting using an approved AL29-4C stainless steel vent system.
• Vertical venting using an approved AL29-4C stainless steel vent system.
• Chimney venting using a masonry or “B” vent chimney and a special Category I Vent Kit available from Crown.
Table 3 summarizes these three venting options. One of the columns in Table 3 must describe the planned vent system exactly.
The following instructions describe the design and installation of Horizontal and Vertical Direct Exhaust (Category III)
systems only. Instructions for Chimney (Category I) venting are provided with the Crown Category I vent kit or are available
from Crown.
WARNING
DO NOT ATTEMPT TO VENT A BWF SERIES BOILER INTO A MASONRY OR “B”
VENT CHIMNEY WITHOUT THE CROWN CATEGORY I VENT KIT SHOWN IN
TABLE III
STRUCTURE PENETRATION WALL ROOF ROOF
MAXIMUM LENGTH:
BWF061 - BWF162
45 FT + 1 EL 39.5 FT + 2 ELS
BWF195,BWF229 (using 4" Pipe) 45 FT + 1 EL 37 FT + 2 ELS
BWF195,BWF229 (using 3" Pipe) 30 FT + 1 EL 24.5 FT + 2 ELS
MINIMUM LENGTH:
BWF061 - BWF162
2 FT + 1 EL 6 FT + 2 ELS
BWF195,BWF229 2 FT + 1 EL 6 FT + 2 ELS
NOMINAL DIA.:
BWF061 - BWF162
3" 3"
BWF195,BWF229 3" or 4" 3" or 4"
BWF061 - BWF162
BWF195,BWF229 (using 4" Pipe)
BWF195,BWF229 (using 3" Pipe)
90 ELBOW OR
TEE
CATEGORY I VENT KIT:
BWF061 - BWF128
CROWN # 650140
BWF162 - BWF229 CROWN # 650141
LISTED CHIMNEY CAP
EXHAUST TERMINAL:
90 ELBOW, TEE,
OR VH-1 TERM. BY VENT MFR.
(TABLE 6)
(*) FLEX-L-INTL STAR-34 , ZFLEX SVE SERIES III, HEAT FAB SAF-T VENT ,
PROTECH SYSTEMS FASNSEAL
NATL. FUEL GAS CODE
CLASSIFICATION
CATEGORY III CATEGORY III
MATERIAL AL29-4C(*) AL29-4C(*)
TABLE 3: SUMMARY OF VENTING OPTIONS
N/A N/A
SIZE PER NATIONAL
FUEL GAS CODE
VENTING TABLES FOR
FAN ASSISTED
APPLIANCE
"B" VENT OR LINED
MASONRY CHIMNEY
(SEE N.F.G.C.)
CHIMNEY VENT
VERTICAL DIRECT
EXHAUST
HORIZONTAL
DIRECT
EXHAUST
CATEGORY I
CLASSIFICATION USED IN THIS
MANUAL