The Exterior Wall Duct With Telescopic Inlet Pipe; Installation Of The Wall Duct With Telescopic Inlet Pipe - Dru NL 31-01 Instructions D'installation Et Mode D'emploi

for walls with a thickness of 50 – 600 mm. Depending on
the thickness of the wall, the inlet and outlet pipes should
be made to length, i.e.:
• length inlet pipe = wall thickness + 20 mm.
• length outlet pipe = wall thickness + 70 mm.
The tension members fixed to the wall grid can be made
to size after installation
Installation of the standard exterior wall duct
(fig. 3)
Slide the adjusted inlet pipe (1) through the mounting
sheet (2), with the turned-back edge facing the mark (45º
top left) in the mounting sheet. Slide the sealing ring (3)
and the wall ring (4) around the inlet pipe, paying atten-
tion to the order (see figure). Take the whole and slide
the inlet pipe into the wall opening. Press the mounting
sheet up to the wall. Press the inlet pipe back in such a
way that the end of the pipe is level with the turned-back
edge of the mounting sheet.
From the outside, bring the wall grid with its attached
tension members into the inlet pipe. Bend the tension
members a little outwards, so that they will jam slightly
in the inlet pipe, keeping the grid in its place. Keep the
mark "Top" up when placing the wall grid. Slide the two
fastening clamps (5) over the tension members (6), taking
care that the fastening clamps catch on the turned-back
edge of the mounting sheet. Fix the screw-nuts onto the
Type A B
NL 31-01 757 339
STYLE 31-01 805 390
NL 51-01 1228 386
fig. 1
fig. 2
D E F
232 ø 230 167
230 ø 230 192
289 ø 230 183
Table 1
11
INSTRUCTIONS FOR INSTALLATION
tension members and tighten them by hand. Place the fas-
tening clamps onto the horizontal centre line of the inlet
pipe. See also the marks in the mounting sheet.
The exterior wall duct with telescopic inlet
pipe
This is suitable for wall thicknesses of 250 – 440 mm
without shortening the parts of the inlet pipe. By short-
ening the pipe's parts, this exterior wall duct can be
adapted for thicknesses of 70 – 250 mm. The outlet pipe
should be adjusted. The tension members attached to
the wall grid can be shortened after the wall duct has
been mounted. If the telescopic inlet pipe is applied for
wall thicknesses of 70 – 250 mm, both parts of the pipe
should be shortened, i.e.:
• the part of the inlet pipe on the side of the wall grid
equal to the thickness of the wall
• the part of the pipe on the side of the heater to a length
equalling the wall thickness minus 20 mm.
CAUTION: do not cut the pipe parts on the side
where the fastening clamps have been applied.
Installation of the wall duct with telescopic
inlet pipe (fig. 3)
From the outside, put the wall grid, together with the
attached half inlet pipe into the created wall opening,
keeping "Top" up when placing the wall grid. Slide the
K M R
3/8" 280 Ø210
3/8" 280 Ø210
3/8" 280 Ø210
NL 31-01 / N 51-01 / STYLE 31-01
S T U
Ø110 255 79
Ø110 255 79
Ø110 255 80
Y
364
364
401