System Design Considerations
VITOGAS 100, GS10
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System Design Considerations
Boiler selection
The boiler model size must be based on an
accurate heat loss calculation of the
building. The boiler selected must be
compatible with connected radiation.
Venting
This boiler is a high efficiency unit. It
operates at an efficiency level which could
yield a condensing condition in the venting
system only. Care should be taken in
providing the proper venting and employing
the best principles of application and sizing.
This boiler is tested to the latest ANSI/CSA
Standard and approved and listed as a
Category II appliance.
A Category II boiler operates with a
non-positive vent static pressure and with a
flue loss of less than 17%.
This type of venting uses natural buoyancy
of the heated flue products to generate a
negative draft in the flue gas pipe.
The Vitogas 100, GS10 boiler requires
special venting. Vent material for a
Category II vent may be purchased locally.
Contact the manufacturer of the vent
material if there is a question about the
suitability of vent material for application on
a Category II vent system.
The vent material must be a Category II
single-wall vent pipe or a Category II
insulated vent pipe. Vent material must be
listed by a nationally recognized testing
agency.
Suitable as vent pipe material (vent pipe or
flexible chimney liner) is stainless steel of
316L or AL-29-4C grade.
Never install a
type A, B, C or L vent with this boiler when
vented vertically.
The chimney must be
designed to be water-tight.
See vent connection illustration (Fig. 1) and
contact information for manufacturers of
suitable Category II vent materials.
Intermediate section
The intermediate section of venting
between the boiler vent pipe collar and the
chimney must be of identical diameter as
the vent connection of the boiler. Use the
shortest possible path between the boiler
and the chimney. A maximum of two
elbows may be installed in the intermediate
section. Avoid the use of two level 90°
elbows.
The intermediate section must be sealed
gas-tight at the boiler vent pipe collar and at
the chimney connection. Ensure any test
port for combustion values is sealed as well.
The chimney connection length between the
boiler vent pipe collar and the chimney must
be installed with insulation. We recommend
consulting a reputable chimney installer for
advice in project-specific circumstances.
Recommended manufacturers of
Category II vent material
CHEMINEE LINING.E inc.
8195, Champ d’Eau
St-Léonard, PQ H1P 1Y1
Tel.: (514) 955-1731
Fax: (514) 955-7375
e-mail: [email protected]
www.chemineelining.com
Flexmaster Canada Ltd.*
Head Office
20 West Pearce Street
Richmond Hill, ON L4B 1E3
Tel.: (905) 731-9411
Fax: (905) 731-7086
www.flexmaster.com
Security Chimneys
International Ltd.*
2125 Monterey
Laval, PQ H7L 3T6
Tel.: (450) 973-9999
Fax: (450) 687-9569
Selkirk Canada
1400 California Ave.
Brockville, ON K6V 5V3
Toll free: 1-800-267-8178
Fax: (613) 342-2735
www.selkirkinc.com
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IMPORTANT
Boiler vent pipe
adaptor (supplied)
90º elbow
Tee
Drain tee cap
Horizontal distance must
be as short as possible.
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*1
Fig. 1
Recommended venting connection for all Vitogas 100, GS10 installations
