Roof Fan STOF
Installation and Maintenance
18
Fläkt Woods
9734 GB 2015.06.30
Specifications are subject to alteration without notice
7. SeRvICe, CONT.
7.3 SCRAppINg
1. There are electrical motor and potentially other electrical com-
ponents inside the fan. All these shall be removed from
service according to instructions given to these components.
2. Steel material is recyclable.
3. Inside the fan there are also small plastic components, which
are made of recyclable material.
7.2.4 mOTOR ReplACemeNT (INSulATed veRSION)
NOTe!
Motor & impeller shall be always replaced as a package.
Open ductwork below the roof fan shall be covered to protect
tools and other small parts from dropping into the duct.
1. Switch off the fan from the isolator and wait 5 min. before
starting the maintenance work.
2. Remove the roof and casings by loosening the M6 bolts
(some of them are hidden behind the hatches).
3. Disconnect the cables.
4. Remove inlet cone (fastened with self-tapping screws and
sealing compound).
5. Remove motor bolts (if necessary protect impeller-motor
package from dropping down) and lift motorized impeller away.
6. Install new motorized impeller and inlet cone (remember
sealing compound). Check that impeller can rotate without
problems.
7. Reconnect the cables.
8. Reinstall casings, roof panel and close hatches.
Start the fan. Check that rotational direction is correct and
the impeller rotates freely and there are no abnormal noises
coming from the fan.
Figure 13.
