Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 1 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Fig. 1
Delivery units
Sizes 50–53 are always supplied as two delivery units
with a split rotor; see Fig. 2.
Fig. 2
Lifting and transport
Weight details for each block unit are stated on the rating
plate. Each block unit is provided with packaging as
illustrated in Fig. 3. These can be transported by fork-lift
truck, pallet truck or open-sided wagon, etc. Lifting can
take place as shown in Figs. 9–11.
Fig. 3
1835
Measurement nipples
Dimensions and weights
Fig. 6
Service
access
space
504
1835
A
1674
3348
D/2
ø D
Size A ø D Weight, kg
50 3004 2700 840
51 3004 2700 815
52 3004 2700 790
53 3304 3000 860
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 2 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Installation of heat exchanger, split model
Tools and materials required
Handle the rotor material with care
Fig. 5
Fig. 4
Delivery
A. The heat exchanger is delivered in a wooden crate; see
Fig. 7.
B. The upper section, with the rotor half in parts, placed
in transport protection with lifting equipment; see
Fig. 8.
C. The lower section, with the assembled half of the
rotor and the drive motor; see Fig. 8.
The necessary bolts, nuts and washers are contained in a plastic bag.
Fig. 7
Fig. 8
1835
A
B
C
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 3 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Lifting components
The components are lifted as shown in Figs. 9, 10 and
11. Lifting eyes should be used when lifting the lower
section (Fig. 9).
Fig. 10
Fig. 9
Fig. 11
Assembly
Regardless of whether the heat exchanger is installed on
its final base, the base must be level. Any unevenness can
be compensated for with spacers. The heat exchanger
must be accessible from both sides for final inspection of
the rotors and adjustment of the seals.
The lower section must be fixed before the start of
work to prevent tipping in the case of vertical installa-
tion. Fixing can be in accordance with Fig. 12 or Fig. 13.
The heat exchanger is intended for vertical installation. If
this is not possible, horizontal installation may be perfor-
med in accordance with these instructions.
Fig. 12. Stay secured to one of the bolts for the diagonal stays.
N.B. One stay to either side of the heat exchanger.
Fig. 13. Stays bolted to existing corners and to the floor or the wall.
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 4 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Fig. 14. Remove the protection and the transport safety device 11 from the rotor.
Lift out the half of the rotor.
Fig. 16. Bend down the lifting arms 14, and lift out the rotor segments 15 and
the spokes 16.
11
Fig. 15. Remove the envelope plates 12 and the straps 13. Save the bolts.
12
13
15 16
14
Fig. 18. Fit the spokes 16 to the hub and the angle brackets 17 for the cover pla-
tes with the bolt supplied.
Fig. 19. Tighten the spoke bolts by hand, although the spoke must still be
capable of sliding in the bolted joint.
Loosely installed
Grease nipple
Fig. 17. Lower section
Important! The installation security device must be
left in position while the rotor segments
are being installed.
Transportsäkring
Installation security device
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 5 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Fig. 22. Lift the rotor segments into position in the installation sequence shown
in the Figure (not in numerical order).
50–53
321
Fig. 20. The rotor segments are marked with an ID number as shown in Fig. 210.
3
2
1
Fig. 21. Example of finished rotor. Segment elements arranged according to
their ID numbers with the numbers facing in the same direction.
This is the ID number,
applied at the factory.
This is the installation
sequence.
Fig. 25. Install the remaining straps. The chamfered bracket faces outwards. Use
the M10 x 80 bolts supplied with washers and locking nuts.
N.B. Locking nuts must be used.
Chamfered bracket
M10 x 80
Locking nut
Fig. 23. Position the inner envelope plate on the periphery of the rotor.
Fig. 24. Install the straps so that they are in contact with the lower half of the
rotor.
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 6 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Fig. 26. If the distance for the last two bolts is too great, use the threaded rod
21. First tighten one of the straps until the M10 x 80 bolt can be fitted in
the second strap.
Remove the threaded rod and fit the remaining bolt.
Fig. 29. Release the tightened spoke bolts slightly. Then tighten the bolted joints
for the straps in turn. Make sure that the distance between the straps is
more or less equal for each spoke. Then tighten all the joints to 10 Nm,
followed by 20 Nm, and finally to 25 Nm. Once all the strap bolts have
been tightened, check the position of the spokes and the roundness of
the rotor one more time. Then tighten the spoke bolts to 50 Nm.
Fig. 28. Remove the transport safety devices 18 from the half of the rotor, one
on each side.
Chamfered bracket
18
Fig. 27. Before the straps can be tightened, the locking nuts (4 nuts) used to
hold the lower half of the rotor must be removed. Release the installa-
tion security devices; see Fig. 28. Rotate the rotor so that the locking
nuts are situated at the top when they are removed.
21
Fig. 30. The inner peripheral surface of the rotor segments must be positioned at
the centre of the marking holes for the spokes as a guide value during
installation.
Remove the
locking nuts.
Rotor: 10 Nm →20 Nm →25 Nm
Spoke: 50 Nm
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 7 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
A
Fig. 31. Verify the smoothness of the rotor by measuring the distance A for each
spoke. A difference of max. 2 mm is acceptable. The spoke is adjusted
by releasing its bolts at the hub and then locking the spoke in the correct
position.
The spoke can be moved into the right position using a clamp or a crow
bar. Turn the rotor and adjust the other spokes in the same way. The
tightening torque for the spoke bolts is 50 Nm.
Check the roundness of the rotor. Max. variation 5 mm.
Fig. 33. Install the outer envelope plates 12. Make sure that they fit over the edge
of the inner envelope plates and rest against the spoke flange. Along the
inner flange surfaces of the outer envelope plates, the flattened part of
the blind rivets must rest against the edges of the inner envelope plates,
as shown in the detailed view in Fig. 32. The outer envelope plates are
fixed with blind rivets at both ends, as shown above.
Fig. 32
Fig. 34. Adjustment of rotor sealing gap.
Mark one spoke with an X, for example.
Measure the dimension A on the X-marked spoke. Turn the rotor
through half a revolution, and measure the dimension B on the same
spoke. If dimension A = dimension B, the rotor shaft is perpendicular.
A difference of max. 2 mm is acceptable.
Turn the rotor through a further 1/6 of a revolution, so that the X-mar-
ked spoke reaches a stay at point C and measure the dimension. The
greatest permissible difference between the A, B and C dimensions is 2
mm.
Check that the sealing gap is 8 mm.
X
Brush strip
Screen wall
Gap ca. 8 mm
Rotary heat exchanger EURA – split rotor, sizes 50–53
Fläkt Woods 3221 GB 05.08 8 Specifications are subject to alteration without notice
EU Air Handling Unit INSTALLATION
Fig. 38. Pass the self-tensioning drive belt over the rotor and the drive pulley of
the motor. Adjust the motor and the drive belt. Check that the drive belt
is centred on the crowned drive pulley. If the belt pulls to one side,
release the fixing bolts for the motor and adjust so that the belt is
centred.
Centred drive belt
Drive wheel
Fig. 35. Adjust the rotor shaft by releasing the rotor securing bolts 1 and 2 on
both sides of the rotor. The A and B dimensions (see Fig. 34) can now
be adjusted by moving the rotor into the right position by hand. The C
dimension is adjusted with the help of the set-screws 3.
The tightening torque for the rotor securing bolts 1 is 53 Nm.
3
2
1
Fig. 37. Install the upper half of the casing. Lock with the outer bolts 1 and the
inner bolts 2. Fix the upright 3 and the panel 4 to the central rail. Install
the hinge for the upper inspection cover in the holes 5.
Check the gap at the screen wall; see Fig. 34.
3
4
2
15
Fig. 36. Installation of hub plate
Cover the holes with
aluminium tape.
/
