User Guide

33
CAUTION
Any doubt on the condition of a chimney or it’s
ability to prevent the generation and accumulation
of ue gas condensate, must be relined according
to NFPA 31 (United States) or CSA B139 (Canada).
CAUTION
Use the chimney venting tables as a guide. It is
highly recommended that any borderline application
should result in the relining of the chimney with
a suitable liner that creates sufcient draft and
to protect against corrosion caused by ue gas
condensate.
3. Bafes – The efciency of the boiler is based on the
insertion of ue bafes supplied with your product.
Under no circumstances are other bafes to be used on
this product. Refer to Section II, Item F, Paragraph 7 for
bafe installation. If there is any doubt on the application
of this boiler on the intended chimney, consult with your
local code ofcials. At a minimum, remove the bafes to
increase the stack temperature. See Tables 15A thru 15C
and 16 for temperature differential (∆T) with bafes IN
and OUT. In addition, the lower the CO
2
level the higher
the stack temperature.
WARNING
Remove the bafes if there are any signs of
condensation in the chimney or chimney connector.
Consult with your local chimney professional for
recommendations.
E. MINIMUM CLEARANCES
See Figure 2A for details regarding clearances to combustibles
for the boiler.
F. OPTIONAL AIR INTAKE PIPING INSTALLATION
- All air for combustion can be supplied directly to the burner
from outdoors providing that the criteria for chimney, vent
connector and minimum stack temperature outlined in this
section can be maintained. (ONLY AVAILABLE WITH
BECKETT BURNER). Refer to Section I, Paragraph
C, Steps 5 and 6 for optional air intake piping installation
information.
WARNING
Using outdoor air in the middle of winter may
result in lower stack temperatures and chimney
degradation. Any signs of condensate seepage
or discoloration at the base of chimney must be
remedied immediately per the details outlined in
this section.
Do not reduce size of air intake pipe.
Read, understand and follow combustion air
instruction restrictions contained in the Pre-
Installation Section of this manual.
V. NATURAL DRAFT VENTING (continued)