CleaverBrooks ProFire Q Series, Installation Operation & Maintenance

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Installation
2-2
750-437
Q Series Full Modulation
2.3 — Draft Conditions
Automatic over-fire draft control or barometric draft regulators are not usually required except where the system
has a tall chimney. The exact height of a chimney requiring draft control is indeterminate, but draft regulation is
seldom needed for chimneys less than 50 feet high, especially with Scotch Marine or sealed firebox boilers.
2.4 — Combustion Air Supply
The space in which a burner operates must be supplied with adequate fresh air for combustion and ventilation
purposes. Fresh air supply must meet or exceed all code requirements. Consult with insurance carrier and/or
local authorities for specific regulations.
2.5 — Combustion Chamber Recommendations
The combustion chamber dimensions should be adequately sized to prevent flame impingements.
2.5.1 — Non-Firetube Applications
The boiler room pressure must be at least equal to the outdoor atmospheric pressure. Where fan ventilation is used,
air must be forced into the boiler room. Never exhaust air from the boiler room. Adjoining areas having exhaust fans
must be positively isolated from the boiler room.
! Warning
A
BLOCK INSULATION
FLOOR
STANDARD
FIREBRICK
B
C
(MIN)