50
VTS reserves the right to implement changes without prior notice
Ventus Air Handling Units
Replacement of bearings mounted on cross-bars in TDF type fans :
1. Deflect the securing washer (1) with the use of a
screwdriver and unscrew the nut (2).
2. Knock out the inside sleeve (3) with the use of a copper
hammer and remove screws (4) fastening the casing. Slide
the casing together with the bearing off the shaft. With the
use of appropriate tools hold up the shaft in the correct
position in order not to damage the inlet cone or the rotor.
3. Replace bearings by fitting new ones in cast iron casing
(you should pay attention to the fact that the inside
diameter of the bearing is cone-shaped and the bearing
should be installed with the bigger diameter from the side
of the fan’s rotor).
4. Fix the casings on the frame paying attention to the
coaxiality of the rotor and the entrance cone. Tighten the
screws fastening the casings. From the side of the cone
drive the sleeve previously slid on the shaft with the use of
the copper hammer. Fix a blocking washer with a nut and
deflect the washers blocking pawl with the use of a
screwdriver. Next spin the wheel to verify if it rotates
properly.
Table 16b. Fan bearings in casings version TAE… / TDF…
Unit
Fan’s type
Hole (mm)
PEER / FYH
Bearing unit type
Bearing housing type
Bearing type
VS 21
TAE160/D
12
FH204 -12G
VS 30
TAE200/D
12
FH204 -12G
VS 40
TAE225/D
12
FH204 -12G
VS 55
TDF280/HM
25
UKP206
P206
UK206
VS 75
TDF315/GM
35
UKP208
P208
UK208
VS 100
TDF355/GM
40
UKP209
P209
UK209
VS 120
TDF400/GM
40
UKP209
P209
UK209
VS 150
TDF450/GM
45
UKP210
P210
UK210
VS 180
TDF500/HM
45
UKP210
P210
UK210
VS 230
TDF560/HM
45
UKP210
P210
UK210
VS 300
TDF560/GM
55
UKP212
P212
UK212
VS 400
TDF630/GM
60
UKP213
P213
UK213
VS 500
TDF710/GM
65
UKP215
P215
UK215
VS 650
TDF900/GM
70
UKP216
P216
UK216
After inspection and maintenance check the fan's rotations. If the fan's rotations direction is not
correct, the air will flow in a correct direction but the fan's output will significantly decrease. The fan's
rotations direction may change due to some electric changes in the electric system and that's why it
should be controlled.
7.5.2 Motors
Thorough and regular maintenance and motor's condition check is necessary in order to detect faults
before serious damages occur.
Before starting any kind of works related to the motor or its subassemblies, particularly before
removing covers protecting against unintended contact with spinning elements or electric shock, the
device should be disconnected from power supply. What is more all additional and secondary circuits
should be disconnected as well.
