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2. New construction around the stove insert, possibly including heat ducts to other rooms.
Mounting and connecting in an existing fireplace.
A. Before mounting the stove insert in a brick-built fireplace, the regulating damper in the existing
chimney must be removed and the smoke neck, if any, should be widened so that the fire tube from
the stove insert can be connected directly to the chimney. Any bricks positioned on edge at the
bottom of the fireplace should also be removed.
In advance, decide with a specialist or the chimney sweep where a soot door (1) should be placed,
so that the fire tube can be cleaned from above while the door of the stove insert remains closed.
A1. First mount the joining flange (2) with a suitable length of fire tubing or flexible tubing (3). Adjust
the fire tubing so that the lower edge of the joining flange matches the edge of the smoke ring, at
the same time making sure that the other end of the fire tube fits the chimney.
Trim approximately 3 fireproof batts of 50 mm each (4) so that they fit tightly into the chimney space
and cut a hole in the centre to fit tightly around the tube.
Installing the mounting box (Drawing A)
Place the fire tube in the chimney so that the joining flange corresponds to the given measurements.
Support, if necessary, the lower edge of the joining flange with a stick of length c.
a. Distance from front edge of the brick hole, if the insert must be flush with the brickwork.
b. Height over the bottom of the stove insert.
Now push the three batts up around the fire tube and press them up into the chimney thereby
achieving a compact and tight-fitting seal.
Seal between fire tube and chimney on top of the batts using heatproof mortar (5). This can be
done through the soot door (1) of the chimney, and should only be done when the stove insert is
assembled.
A2. Push the outer casing (6) into place at the bottom of the fireplace. Carefully ensure that the outer
casing is level and that its front edge is flush with the brickwork.
A3. Remove smoke shelf (7) and smoke plate (8) from the stove insert. Place a Ø 5 mm seal into the
bottom of the outlet bushing. Then push the stove insert (9) into place in the outer casing.
If the gap between the fireplace aperture and the mounting box is to be closed with brickwork, there
must be a minimum distance of 3 mm around the mounting box. The brickwork above the mount-
ing box must therefore be self-supporting. Secure the mounting box to the bricks with at least one
screw in each side and one in the bottom, if necessary.
Connecting external supply of fresh air (Drawing B)
HWAM I 20/80 is ready to be connected to a fresh air system. which can be bought separately. The
system comprises a flexible hose and three hose connections. The fresh air system can be connected to
the mounting box in three places (right, left, and at the back).
Choose whether to connect the fresh air system to one of the sides or the back of the mounting box
before installing the mounting box and the stove. When connecting the system to one of the sides, the
small, round metal plates (A or B, drawing B1) must be pressed out of the mounting box. However, when
connecting the system to the back of the mounting box, only one metal plate should be pushed out
