Roof Fan STOF
Installation and Maintenance
16
Fläkt Woods
9734 GB 2015.06.30
Specifications are subject to alteration without notice
The roof fan does not need any special service. However, it is
necessary to clean the fan impeller especially when the air is not
clean. This helps to avoid vibrations in the impeller.
If there is an abnormal noise coming from the motor bearings, the
motor and impeller or complete fan unit shall be replaced.
7.1 WARRANTy
Requirement for the warranty is that the installation is carried out
properly and the necessary service actions have been made. If
there are problems during the warranty period, the manufacturer
or dealer has to be informed. Warranty does not cover any
service or indirect costs.
7.2 SeRvICe
T
he electrical installations are allowed to be carried
out only by authorized personnel.
Make sure that an opened fan cannot fall down.
7. SeRvICe
7.2.1 mAINTeNANCe, CleANINg OF The ImpelleR,
mOTOR ANd FAN CASINg
(uNINSulATed veRSIONS, SIzeS 225 - 630).
1. Switch off the fan from the isolator and wait 5 minutes before
starting the maintenance work.
versions with hinges:
2. Open the fastening screws (4 pcs) so that the fan casing can
be opened. The fan shall be locked to open position with stay
fastener(s), figure 10 below.
3. Check that the stay fastener(s) are locked and that the hinge
bolts, the bottom plate and the installation frame are correctly
fastened.
4. Clean necessary components and the casing. Open the stay
fastener(s) and let the fan carefully back to its operation
position. Start the fan and check that the impeller is rotating
without problems.
The casing can be cleaned from the inside also by removing
the roof and the casing (fixed together) in the vertical discharge
version, point 3.1.1.
Horizontal version can be cleaned by removing the cowl and the
bird guards. point 3.1.3.
Bottom plate
of the fan
Stay fastener(s)
Hinge bolts
Mounting frame
(STEZ-03)
with hinges
Figure 10.
