Dunkirk Excelsior EXB Series - Manual (Page 35)

35
Table 8 - Recommended Minimum Chimney Sizes
FIRING RATE
(gph)
CHIMNEY
HEIGHT (ft)
NOMINAL
CHIMNEY
ROUND
LINER INSIDE
SQUARE
LINER
INSIDE
0.60 -1.30 15 8” x 8” 6” 6 ¾” x 6 ¾”
1.31 -1.80 15 8” x 8” 7” 6 ¾” x 6 ¾”
1.81 -2.00 20 8” x 8” 8” 6 ¾” x 6 ¾”
For elevations above 2,000 feet above sea level, add 3 feet to the chimney heights.
14.1 Chimney Venting
Oil fired boilers with connections to vents or chimneys,
vent installation shall conform to requirements of
authority having jurisdiction or in absence of such
requirements NFPA 31 Installation Of Oil Burning
Equipment (U.S.) or CSA B139 (Canada) and
applicable provisions of local building codes.
Installation shall conform to requirements of
NFPA31 – Standard for the Installation of Oil-
Burning Equipment and NFPA 211 – Standard for
Chimneys, Fireplaces, Vents, and Solid Fuel-Burning
Appliances for installations and requirements of CSA
B139 – Installation Code for Oil-burning Equipment.
(Installations in Canada).
1. Ensure sufficient draft during heating season to allow
for safe evacuation of flue gasses.
2. Boiler can be vented into fireclay tile-lined masonry
chimney or type L vent or factory built chimney that
complies with type HT requirements of UL103. See
Figure 32, Page 37.
3. Chimney Inspection – Prior to installation of any new or
replacement fuel burning equipment chimney shall be
inspected by qualified service agency.
A. De-rating may cause condensation on interior
walls of chimney and boiler. Loose mortar can be
indication of history of condensing flue gases upon
inside walls of chimney. Do not install chimney until
it meets requirements of NFPA 211 or CSA B139.
B. Unlined Chimney – Do not install boiler if chimney
is constructed of brick only. Only approved clay
liners or listed chimney lining systems shall be used
as specified in NFPA 31 or CSA B139.
C. Abandoned Openings – Seal Openings through
chimney wall that are no longer used in accordance
to NFPA 211.
D. Clean Chimney – Chimney shall be free of all loose
debris.
4. Install draft regulator at least 18” above breech; 18”
of straight run up-stream of regulator ensures proper
operation.
5. Draft Regulator – Use supplied draft regulator with this
appliance. Do not use any other draft regulator. See
Figure 31, Page 37.
14 - CHIMNEY AND VENTING CONNECTIONS