5
Dutchwest Non-Catalytic Convection Heater
30003850
ST241
chimney types
12/13/99 djt
Prefabricated Double-Wall
Insulated Chimney
Tile Lined
Masonry
Chimney
ST241
Fig. 2
If in sound condition and approved for use, either a
masonry or a prefabricated chimney may be used.
Prefabricated Chimneys
These should be an internal diameter of 150 mm (6”)
and be of the twin wall insulated construction that has
been approved for solid fuel use (e.g. Rite Vent ICS of
ICID Lite Chimney Systems). Diameters over 200 mm
(8”) are not recommended due to the large cross-sec-
tion causing excessive cooling of the flue gases.
A horizontal connector run should be inclined 20 mm
per meter (1/4” per foot) from the stove toward the
chimney. The recommended maximum length of a
horizontal run is 914 mm (36”) and the total length of
chimney connector should be no longer than 2.4 m (8’).
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
Chimney Size
The Model 2478CE heater should be vented into a ma-
sonry chimney with a square flue with nominal flue size
of 203 x 203 mm (8” x 8”), or a round flue with nominal
flue size of 152 mm (6”).
Chimney liners larger than 203 x 305 mm (8” x 12”) may
promote rapid cooling of smoke and reduction in draft,
especially if they are located outside the home. These
large chimneys may need to be insulated or have their
flues relined for proper stove performance.
Accessories to help make the connection between
stainless steel chimney liners and the stove are avail-
able through your local dealer.
Guidelines for Installing
the Chimney Connector
The chimney connector is the single-wall pipe, or listed
and approved double-wall pipe that connects the stove
to the chimney. The chimney itself is a masonry or
prefabricated structure that encloses the flue. Chimney
connectors are used only to make the connection from
the stove to the chimney.
Connecting Flue Pipes
Connector pipes should meet the requirements of the
building regulations. This can be achieved by the use
connecting fluepipes included in the following catego-
ries:
a) Vitreous enamelled steel pipe complying with BS
6999: 1989 (1996);
b) Pipes made from stainless steel as descirbed in BS
EN 1008-1:1995 grades 1.4401, 1.4404, 1.4432 or
1.4436 with flue wall thickness of at least 1 mm;
c) Mild steel fluepipes complying with BS 1449: Part 1:
1991, with a flue wall thickness of at least 3 mm;
d) Cast iron fluepipes complying with BS 41: 1973
(1998).
Flue Pipes with a spigot and socket joint should be
fitted with the socket facing upwards, to contain con-
densates and moisture within the flue. Joints should be
made gas tight using proprietary jointing accessories,
or, where appropriate, by packing joint with noncombus-
tible rope and fire cement.
Do not pass the chimney connector through a combus-
tible wall, floor, or ceiling, through an attic or roof space,
or through a closet or similar concealed space. If pas-
sage through a combustible wall is unavoidable, follow
the recommendations in the following section on Wall
Pass-Throughs. Keep the passage as short and direct
as possible, with no more than two 90° turns.
ST418
chimney connector
6/00
Chimney
Elbow
Slip Pipe
Standard Connector
Flue Liner
Flue
Thimble
Flue Collar
Floor Protector
ST418
Fig. 3
Sections of a steel chimney connector of at least 24
gauge thickness are fastened together with screws to
connect the stove to the chimney.
Two Types of Connector
You may use either a single-wall steel connector of the
size and gauge described below, or a listed and ap-
proved double-wall connector.