IBC SL 28-160 Installation And Operating Instructions Manual page 18

WARNING
When using Indoor
Air options, adequate
combustion air must be
supplied to the boiler room
according to the requirements
of all applicable codes.
NOTE
Combustion fan
blockages can occur when
environmental particulate and
foreign matter contaminants
(leaves, dust, dandelion &
cottonwood fluff, etc) are
drawn into the air intake. In
areas where this problem is
suspected to be an issue,
our optional air intake filter
should be installed.
Filters should be checked
and cleaned or replaced on
a regular schedule based on
the severity of the problem.
1-14
SL 28-160 MODULATING GAS BOILER
For the inlet air – Schedule 40 PVC, CPVC, ABS or PPs piping of any type is
permitted. Use same diameter as Vent pipe.
It is not permitted to add to the exhaust length by transfer of unused
NOTE:
intake allowance.
Combustion air piping - if used - is inserted directly into the 3" female stainless
steel fitting on the top, right side of the boiler and run horizontally or vertically to
the outdoors. Screen material can be placed at the inlet as appropriate for the
environment (e.g. insects, dust).
Care must be taken to ensure adequate separation is maintained between the
air intake inlet and the vent terminal. Refer to the vent terminal configuration
drawings in the Vent Termination section above.
Support should be provided for intake piping, particularly so for horizontal runs
(follow local code).
Figure 17: Indoor combustion air intake
1.4.8 "Indoor Air" Combustion Air Intake
An "Indoor Combustion Air installation", as described herein, is one in which air
for combustion is taken from the ambient air around the boiler.
To support combustion, an ample air supply is required. This may require
direct openings in the boiler room to the outside. If the boiler is not in a room
adjacent to an outside wall, air may be ducted from outside wall openings.
Provisions for combustion and ventilation air must be made as follows:
•
in the USA, in accordance with the National Fuel Gas Code, ANSI Z223.1
(latest edition), or applicable provisions of the local building codes
•
in Canada, in compliance with B149.1-10
INSTALLATION AND OPERATION INSTRUCTIONS