Requirements For Connection To Chimneys Or Venting Systems - Buderus Logano GC124 II/SP Installation And Service Instructions Manual

Requirements for connection to chimneys or venting systems

9 Requirements for connection to chimneys or venting systems
The flue connection must comply with the regulations of
the National Fuel Gas Code, Part 7, Venting of
Equipment, and the local construction codes.
Flue connections of heating systems with natural
venting must not be connected with any component of a
mechanically operated venting system that operates
with overpressure.
The cross-section of the flue connection must not be
less than that specified in Tab. 1, page 8.
If the boiler is to be connected to a brick chimney, the
chnimney must be thoroughly inspected before use. The
chimney must be clean, in compliance with construction
codes and of sufficient dimensions.
Chimneys with an internal liner are preferred and are
only permitted if the liner complies with all national, state
and local construction codes. Liners of fire-glazed brick
with moisture-proof joints and liners of corrosion-
resistant material are recommended. Contact the local
gas supply company for advice and recommendations
for flue connection and chimney liners. A flue pipe of
single-walled sheet metal is required for flue
connections for type II models.
An adequate chimney height in compliance with the
tables of the National Fuel Gas Code, ANSI Z 223.1, is
required.
Separation of a boiler from a common flue system
If an existing boiler is separated from a common venting
system, the venting system will then be too large to
guarantee correct venting for the heating systems that
remain connected to the system.
Test the venting system by the following procedure:
Carry out these steps with every heating system that
remains connected to the venting system when the
boiler is separated from a common venting system.
Every heating system must be started in operation and
the other heating systems must remain turned off.
A All unused openings of the common system must be
sealed.
B Inspect the venting system to ensure that it has the correct
dimensions and longitudinal inclination. Make sure that the
system is not blocked, leaking, corroded or has any other
faults that cause it to operate improperly.
C If necessary, close all doors and windows in the building
and all doors between the space in which the heating
systems that remain connected to the venting system are
installed and the other rooms of the building. Turn off
washing machines and dryers and all appliances that are
not connected to the venting system. Run all venting fans
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
and bathroom exhaust fans at maximum speed. Fans in
use in summer must remain in operation and oven exhaust
system flaps must be closed.
D Now start the heating system that is to be tested. Follow the
instructions for starting. Set the thermostat for continuous
operation.
E After the main gas burner has been operating for five
minutes, check the opening at the back flow check for
drafts with a match flame or a candle, or with the smoke of
a cigarette, cigar or pipe.
F Then all heating systems that remain connected to the
venting system have been checked as above to ensure
that the venting operates properly, return all doors,
windows, exhaust fans, oven exhaust flaps and all other
gas-fired appliances to their original position.
G Any incorrect status of the common venting system must
be corrected to ensure that the heating system complies
with the regulations of the National Fuel Gas Code, ANSI Z
223.1. If the size of any component of the common venting
system is changed, the complete venting system must be
resized to comply with the relevant tables in Part 11 of the
National Fuel Gas Code, ANSI Z 223.1.
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