Check Openings For Combustion Air Supply And Venting - Buderus Logano GC124 II/SP Installation And Service Instructions Manual

8

Check openings for combustion air supply and venting

8 Check openings for combustion air supply and venting
BOILER DAMAGE AND OPERATING
FAULTS
due to missing or inadequate openings for
CAUTION!
combustion air and venting of the boiler
room.
Inadequate venting of the boiler room may
result in excessive ambient temperatures.
This can damage the boiler.
Inadequate combustion air supply may
cause operating faults.
Make sure that inlets and outlets are
not reduced or closed and that they are
adequately dimensioned.
If faults are not corrected immediately,
the boiler must not be operated
Inform the system operator of the fault
and the danger.
To ensure an adequate combustion air supply and
venting of the heating system suitable measures must
be taken in accordance with the National Fuel Gas
Code, Section 5.3, Air for Combustion and Ventilation,
or the local codes.
BOILER DAMAGE
due to contaminated combustion air.
Never use cleaning agents that contain
CAUTION!
chlorine and halogenated
hydrocarbons (e.g. spray bottles,
solvents and cleaning agents, paints,
glues).
Do not store or use these substances in
the boiler room.
Prevent excessive dust levels.
FIRE DANGER
due to flammable materials or liquids.
Do not store flammable materials or
WARNING!
liquids in the immediate vicinity of the
heat generator.
22 Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
Total air supply from inside the building
Make sure that the boiler room has two permanent
openings that are connected with one or more other
rooms. When calculating the cross-section areas of the
openings, the total combustion output of all gas-fired
appliances in the connected rooms must be taken into
account. Each opening must have a minimum cross-
section of one square inch per 1000 Btu/h of the total
combustion output of all gas-fired appliances inside the
connected rooms. Note that the minimum cross-section
of every opening must not be less than 100 square
inches. One opening must not be more than 12 inches
from the ceiling and the other must not be more than 12
inches from the floor of the boiler room, calculated from
the outer edge of the opening. The shortest dimension
of all inlet and outlet openings must not be less than
three inches.
Total air supply from outside the building
Make sure that the boiler room has two permanent
openings, one of which must not be more than 12 inches
from the ceiling and the other must not be more than
12 inches from the floor of the boiler room, calculated
from the outer edge of the opening. The openings have
a direct connection or a connection through ventilation
ducts to the outside or to rooms that have an
unobstructed connection to the outside (crawl space or
attic). The shortest dimension of all inlet and outlet
openings must not be less than three inches.
1. If there is a direct connection to the outside, each
opening must have a minimum cross-section of one
square inch per 4000 Btu/h of the total combustion
output of all gas-fired appliances inside the closed
room.
2. If there is a connection to the outside through
vertical ventilation ducts, each opening must have a
minimum cross-section of one square inch per 4000
Btu/h of the total combustion output of all gas-fired
appliances inside the closed room.
3. If there is a connection to the outside through
horizontal ventilation ducts, each opening must have
a minimum cross-section of one square inch per
2000 Btu/h of the total combustion output of all gas-
fired appliances inside the closed room.
4. If the openings are connected to ventilation ducts,
the ducts must have the same cross-section area as
the openings.
We reserve the right to make any changes due to technical modifications.