Bryan Boilers 250 Manual De Usuario

 

Date:  

8-4-2010 

 

Revision: 0 

 

Form:  

2396

 

Combustion Air Supply Dampers, Louvers, 
and Grilles 

 
The free area of the combustion air supply 
opening shall be calculated by subtracting the 
blockage area of all fixed louvers, grilles or 
screens from the gross area of the opening. 
Openings in a fixed louver, grille, or screen shall 
have no dimension smaller than ¼” (6 mm). 
No manually operated damper or manually 
operated adjustable louvers are permitted. 
A motorized damper or louvers shall be 
interlocked so the burner(s) cannot operate 
unless the damper or louver is in the fully open 
position. 

 

Mechanical Combustion Air Supply 

 
When combustion air is supplied by mechanical 
means, an airflow sensing device shall be 
installed and wired into the safety limit circuit of 
the primary safety control to shut off the gas in 
the even a an air supply failure. 
 

Appliance Venting per CAN/CSA-B149.1-
05  

 

Paragraph 8.9 of CAN/CSA-B149.1-05 addresses 
“Appliance Venting”.  Paragraphs 8.9 through 8.31 
address many facets of flue gas vents, many of which 
do not apply to the Triple-Flex boiler, which is a 
Category IV listed appliance requiring the use of 
special venting systems as previously described. 
 

Please note that the information provided in this 
manual relative to the Canadian Standard is not 
meant to be all-inclusive.  Reading the entire 
Standard is strongly suggested.  The final 
approval of all system designs must be 
acceptable to the authority having jurisdiction. 
 
 

•  Venting for Category IV appliances shall 

be as specified or furnished by the 
manufacturer of the listed appliance.  
The Triple-Flex boiler is a Category IV 
appliance requiring the use of special 
vent that is certified. 

•  A special venting system shall be 

installed in accordance with the terms of 
it’s listing and the vent manufacturers 
certified installation manual. 

•  A flue gas vent or a vent connector shall 

not be installed in either a duct or a 

shaft used for return air, hot air, 
ventilating air, or combustion air. 

•  An appliance that operates at a positive 

vent pressure shall not be connected to 
a venting system serving any other 
appliance.  The Triple-Flex boiler 
operates at a positive vent pressure. 

•  A factory-built chimney used for venting 

an appliance shall be certified. 

 

Vent Sizing 

 

•  A vent or chimney serving a single 

appliance shall provide effecting venting 
and shall be sized so that it’s effective 
area is not less than that of the flue 
outlet diameter of the boiler and in 
accordance with engineering venting 
tables acceptable to the authority having 
jurisdiction. 

•  A vent or chimney serving more than 

one appliance shall provide effective 
venting and shall be sized in 
accordance with good engineering 
practice, such as by the use of 
engineering venting tables acceptable to 
the authority having jurisdiction. 

 

 

 

Where solid and liquid fuels are used, gas vents, 
must be plainly and permanently identified by a 
label.  The label should read, "This gas vent is 
for appliances that burn gas only.  Do not 
connect to incinerators or solid or liquid fuel 
burning appliances." 
This label must be attached to the wall or ceiling 
at a point near where the gas vent connector 
enters the wall, ceiling or chimney. 
The authority having jurisdiction must determine 
whether their area constitutes such a locality. 
 

Solid Fuel Appliance Vents 

Gas appliances shall not be vented to a vent or 
a chimney that serves a solid-fuel burning 
appliance. 

8