18
Versio
n
11
.2
01
2
©
Fläkt
W
oods
O
y
g
n
i
c
i
v
r
e
S
F
E
T
S
R
E
T
S
A
M
F
O
O
R
3. Open the back plate of the impeller and prise the
impeller off the motor shaft. If necessary use an
extractor. Note! It is advisable to cover the the
chimney opening before dismantling the impeller so
that parts or tools will not fall down the chimney.
4. Lowe the fan section and remove the protective
screen…(Fig. 4), loose the motor cable and remove
the motor from the motor bracket.
5. Mount a new motor and fan impeller in the reverse
order.
6. Close the roof fan, turn it on and check that no
abnormal noise or vibrations occur and that the
impeller rotates to the right direction.
Maintenance of smoke extraction version
Follow the instructions above. In the maintenance of
smoke extraction version the local regulations and norms
must also be followed.
Scrapping the fan
Sort the materials in accordance with national
environmental regulations and deliver the materials either
for recycling or proper disposal.
Maintenance
Under normal operating conditions the roof fan does not
require any other maintenance except for checking the
motor bearings. If the fan is used for applications where
exhaust air contains impurities (for example kitchen) the
impeller and the fan casing must be cleaned regularly.
All local regulations and norms must be complied with.
To clean the impeller, casing and duct
1. Switch off the roof fan from the safety switch.
2. Back off the fixing screws appr. 10 mm so that the
fan section can be raised on its hinges. The stay rod
(1 or 2 stay rods depending on the fan size) locks
the fan section automatically in the fully open position
as shown in the Figure 3.
3. Make sure that the stay rod has become locked
properly in the open position and that the mounting of
the fan base plate (and possible mounting frame)
is in good condition.
4. Clean as required. The sound insulated fan casing
surfaces can also be cleaned since the insulation is
protected.
5. On having completed the maintenance work release
the stay rod by depressing the locking lever (see
Figure 3) and lower the fan section back to its initial
position. Re-tighten the fixing screws. The fan casing
can also be cleaned from the top after removing
the protective screen.
Fig. 3
Fig. 4
Lockinh lever
Stay rod
Fixing screw
To change the motor and the impeller
1. Switch off the roof fan from the safety switch.
2. Open the fan section as described in previous section
„Maintenance“, pos. 2 and 3.
