FläktGroup eQ Master EQRB RHE split rotor Installation and Maintenance Manual

Brand: FläktGroup

Model: eQ Master EQRB RHE split rotor

Type: Installation and Maintenance Manual

FläktGroup DC_8932GB 20220928_R5 Speciﬁcations are subject to alteration without notice

ROTARY HEAT EXCHANGER EQRB –

SPLIT ROTOR

INSTALLATION AND MAINTENANCE INSTRUCTION

IMPORTANT!

Regarding the control logic and operation:

During start up and after each time the AHU

has been stopped, it is recommended that the

exhaust fan operates during 1 minute before the

supply fan is started.

EURA 1;1

ABSORPTION ROTORS

The surface coating on absorption rotors

operates by absorbing and releasing

moisture. The surface coating is very effective

at absorbing moisture. The moisture in the

airflow is transferred from one air stream to the

other when the rotor rotates. If the rotary heat

exchanger is stationary for an extended period

without air flowing through it, the surface coating

will continue to absorb moisture. When the unit

is started following a long period of downtime,

the rotor may have absorbed a lot of water. We

recommend ensuring that there is a continuous

airflow through the rotary heat exchanger. If,

for some reason, continuous operation of the

unit is not permitted, start the exhaust air fan

at minimum airflow following an extended

period of downtime and ventilate the rotary heat

exchanger to remove excess moisture.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

DIMENSIONS AND WEIGHT

500 A

1676

3352

D/2

EURA DELAD 3

Fig. 6

Service

compartment

Size A B ø D Weight, kg

020 1800

2152

1580 ≤ 322

027 1800

2152

1580 ≤ 310

036 2500

2752

2200 ≤ 525

041 2000 2152 1780 ≤ 320

045 2500 2752 2200 ≤ 500

050 2300 2452 2080 ≤ 355

054 2600 2752 2400 ≤ 680

056 3000 3352 2700 ≤ 820

063 2600 2752 2400 ≤ 680

068 3000 3352 2700 ≤ 820

072 2600 2752 2400 ≤ 680

079 3000 3352 2700 ≤ 820

090 3300 3352 3000 ≤ 860

B/2

DELIVERY UNITS

The units is transported in two parts and a split rotor, see ﬁgure 2.

1835

B/2

Fig. 2

LIFTING AND TRANSPORT

The weights of each unit are speciﬁed on the data plate. Each unit

is packaged as in Figure 3. Units can be transported using a fork lift

truck, pallet truck or platform trolley. Lift in accordance with Figures

9–11.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

INSTALLING SPLIT HEAT EXCHANGER

Tools and materials needed

Fig. 4

Handle the rotor components with care.

Fig. 5

1835

1830

DE LIVERY

A. The heat exchanger is delivered in wooden crates, Fig. 7.

B. The top part with the rotor half in sections, with transport

protection and lifting lugs, Fig. 8.

C. The bottom half with a ready assembled rotor half and

drive motor, Fig. 8.

Plastic bag with the necessary bolts, nuts and washers.

Fig. 7

Fig. 8

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

LIFTING COMPONENTS

Fig. 9

EURA delad fig.7

Fig. 10

Fig. 11

ASSEMBLY

Regardless of whether or not the heat exchanger is assembled in its

ﬁnal location, the surface supporting it must be ﬂat. Fit spacers under

the heat exchanger to compensate for any surface irregularities.

The heat exchanger must be accessible from both sides for the ﬁnal

inspection of the rotor and adjustment of the seals.

To prevent the heat exchanger from falling over when it is being

assembled in an upright position, secure the bottom half in position

before starting the work. Secure it in accordance with

Figures 12 or 13.

Assemble the heat exchanger upright. If this is not possible, assemble

it ﬂat in accordance with these instructions.

Lift components in accordance with Figures 9, 10 and 11. Use lifting

lugs when lifting the lower part (Fig. 9).

Fig. 12. Strut secured in one of the bolts in the diagonal stay

NOTE!

One strut on each side of the heat exchanger.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

Fig. 14. Remove the rotor protection, transport locking device 11.

Lift out the rotor half.

EURA 11

EURA FIG 17;1

20–42

EURA DELAD 17;1

Fig. 15. Remove the rim plates 12, and retaining straps 13.

Save the bolts.

Fig. 16. Bend down the lifting arms 14, and lift out the rotor segments

15 and spokes 16.

EURA FIG 18

15 16

Transportsäkring

Assembly locking device

IMPORTANT!

Leave the assembly locking device in place while the rotor segments

are being assembled.

Fig. 18. Fit the spokes 16 to the hub and the locating brackets 17 for

the cover plates using the bolts supplied.

EURA DELAD 14

Fig. 19. Tighten the spoke bolts by hand, the spoke must still be able to

slide in the bolted joint.

Fig. 17. Lower part

Loosely ﬁtted

Grease nipple

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

�

Fig. 20. The rotor segments have ID numbers in accordance with

Figure 21.

ID ASSEMBLY This ID numbering is carried

out at the factory.

Fig. 21. Examples of external components. Order the segments

according to their ID numbers with the digits facing in the

same direction.

ID ASSEMBLY

Fig.22. Lift in the rotor segments in their assembly sequence as

illustrated. NOTE! The assembly sequence is not the same as

ID assembly (Fig. 21). Take care to position the rotor segments

in the correct direction of travel. Positioning them incorrectly

will lead to the rotor being out-of-true.

Fig. 25. Fit the other retaining straps. The bevelled corner must face

outwards. Use the M10 x 80 bolts supplied, with washers and

lock nuts. NOTE! Use lock nuts.

Fig. 23. Position the inner rim plate on the periphery of the rotor.

Fig. 24. Fit the retaining straps that are to sit against the lower

rotor half.

NOTE! Not the

assembly

sequence! See

Fig. 22

Bevelled corner

M10 x 80

Lock nut

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

Fig. 26. If the distance for the two last bolts is too great, use threaded

rod 21. First tighten one retaining strap until the M10 x 80 bolt

can be ﬁtted in the other retaining strap. Remove the threaded

rod and ﬁt the remaining bolt.

Fig. 28. Remove the transport safety devices 18 on the rotor half, one

on each side.

Fig. 27. Before the retaining straps can be tightened, the locknuts (4)

that have been holding the lower rotor half must be removed.

Remove the assembly locking devices, see Fig. 28. Rotate

the rotor so that the lock nuts are on the top when they are

removed.

Remove the lock nuts

Bevelled corner

Fig. 29. Slacken off the tightened spoke bolts slightly. Then tighten the

bolted joints on the retaining straps in stages. Ensure that the

distance between the retaining straps is roughly equal at each

spoke. Then tighten all joints to 10 Nm, then to 20 Nm and

ﬁnally to 25 Nm. When all retaining strapbolts have been

tightened, the position of the spokes and the roundness of

the rotor must be checked once more. After that the spoke

bolts are tightened to 50 Nm.

Fig. 30. As a guide value during assembly, the inner perimeter surface

of the rotor segments is to be located in the centre of the

marking holes in the spokes.

Rotor: 10 Nm " 20 Nm " 25 Nm

Spoke: 50 Nm

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

Fig. 31. Measure the ﬂatness of the rotor by measuring the distance

A for each spoke. A difference of max. 2 mm is tolerated.

Adjust the spoke by slackening off its bolts at the hub,

relocking them when the spoke is in the correct position. The

spoke can be moved to the correct position using a clamp or

lever. 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. Maximum deviation 5 mm.

Fig. 32. Take the outer plates delivered as separate parts with the

rotor. Do these steps for each outer plate:

Place the foam plastic tape at the edge of the outer plate. Make

sure that foam plastic tape is placed on the edge closest to

the rotor cassette.

Place the brush strip on the foam plastic tape. Make sure

that the brush is on the outside of the outer plate.

Use screws to make sure that the brush strip is stuck on the

outer plate. Make sure that the screws penetrate the brush

strip and all the way to the outer plate. Start by ﬁxing the screw

at one end of the brush strip. The brush strip should then be

pulled tight and a screw ﬁxed at the other end. Intermediate

screws should be used as shown in the illustration above.

Fig. 34 The outer plate is secured to the ﬂange on the spoke using

pop rivets.

Fig. 33

Fig. 34

Brush strip

Foam plastic tape

Outer plate

Screw

U++C1036-3010

String

Note!

Make sure to remove the string from the brush

strip before mounting. The string is only there for

transport purposes.

(19)

Fig. 33: Install the outer plates. Ensure that they ﬁt over the edge of

the inner rim plates and that the centre of the outer plate is

centred above the ﬂange on the spoke. Install mounting

brackets (19) at each end of the outer plate.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

Fig. 35. Adjusting the rotor seal gap:

Mark a spoke, with an X for example.

Measure the dimension A at the X marked spoke.

Turn the rotor a 1/2 turn and measure the dimension B at

the same spoke. If dimension A = B the rotor shaft is square.

A difference of max. 2 mm is tolerated.

Turn the rotor another 1/6 turn so that the X marked spoke

gets to a stay at point C and measure the dimension.

The maximum permitted difference between A, B and C is

2 mm.

Check that the seal gap is 8 mm.

EURA 1;2

Brush strip

Shield

Gap approx. 8 mm

3154 94;27 EURA FIG

Fig. 37. Fitting the hub plate.

The holes must be covered

with aluminium tape

Fig. 36. Adjust the rotor shaft by slackening off the rotor

mounting bolts 1 and 2 on both sides of the rotor. The A and

B dimensions, see Fig. 35, can be adjusted by pushing the

rotor into the correct position by hand. The C dimension is

adjusted using adjustment bolts 3. The tightening torque for the

rotor mounting bolts 1 is 53 Nm.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

TO CHANGE THE DRIVE BELT

Normally, the drive belts will work many years of operation but can be

replaced if and when necessary. The original belt has a welded joint. The

replacement belt is jointed together by means of the pin supplied with it.

The correct replacement belt with correct length can be selected from

the spare parts list (9441 GB). Alternatively, 10 or 20 meter length can be

purchased for cutting and fixing on site.

DIRECTION OF ROTATION

Check that the rotor is rotating in the right direction.

MAINTENANCE

Inspection and service on the heat recovery unit concern mainly the rotor,

seals and drive equipment.

The heat recovery unit is accessible for service through the inspection

doors which cover the whole of the side wall. The rotor can be rolled out

for service.

The intervals are based on the assumption that the unit is in operation

for about 2000 hours over a 12-month period and operates in a normal

comfort ventilation installation. If the dust content of the supply and/

or exhaust air is high, the unit should be inspected more frequently.

Maintenance of the heat recovery unit is greatly facilitated if the recom-

mended equipment is used for monitoring and purging operation.

EURA DELAD FIG 2

Fig. 39. Loop the self-tensioning drive belt over the rotor and drive

pulley on the motor. Adjusting the motor and drive belt. Check

that the drive belt centres on the crowned drive pulley. If the

belt is pulling one way, Slacken off the motor mounting bolts

and adjust to centre the belt.

Centred drive belt

Drive pulley

Fig. 38. Fit the upper half of the casing. Secure using the outer bolts

1 and the inner pop rivet 2. Bolt the panel into place against

the centre beam. Fit the upper inspection hatch hinge into the

holes 4. Check the gap at the shield, see Fig. 35.

Installation and Maintenance

FläktGroup DC_8932GB 20220928_R5 Specifications are subject to alteration without notice

ROTOR - FACE SURFACES

Non-hygroscopic

Check that there is no dust deposit on the rotor faces.

If necessary, either vacuum-clean the rotor or use compressed air aimed

straight at the surface from a distance of at least 50 mm blowing from

the clean towards the dust coated side.

If vacuum-cleaning or blowing with compressed air proves to be inade-

quate (greasy dust), clean the non-hygroscopic rotor surface as follows:

Spray a grease solvent by hand onto the dust-coated surface, then blow

clean with compressed air from the opposite side aimed straight at the

surface from a distance of at least 50 mm.

As an alternative, the rotor may be flushed with low pressure steam up

to 50 kPa or water up to 50 bar from a distance of at least 50 mm aiming

straight at the surface, provided that the condensate from the steam or

the flushing water can be satisfactory collected.

Hygroscopic/Sorption/Epoxy

Check that there is no dust deposit on the rotor faces.

If necessary, either vacuum-clean the rotor face or use compressed air

aimed straight at the surface from a distance of at least 50 mm blowing

from the clean side towards the dust coated side.

Water or grease solvents may not be used for these types of rotors

Object Interval Action

Rotor face 6 months Inspect and clean,

if necessary.

Drive belt 6 months Check for tension and wear.

Rotor bearings 12 months For EQRB size 056, 068, 079 and 090

relubricate the bearings, see bearings

section. For other sizes EQRB has perma-

nently lubricated bearings.

Monitoring

equipment

12 months Check the performance.

BEARINGS

Generally, the EQRB is equipped with permanently lubricated bearings

for which no maintenance is needed. However, the sizes 056, 068, 079

and 090, has bearings provided with lubrication nipples for relubrication.

Normal lubrication interval is 12 months and recommended grease to

use is shown on a label that are placed on the unit, see figure below:

IMPORTANT!

Never use methyl ethyl ketone, acetone or other

aggressive solvents.

SERVICE SCHEDULE

The lubrication nipples, one for each rotor bearing, are located under

each hub cover on the underside of the shaft bracket, see figure below:

FETT, GREASE VAIHTO, GRAISSE, VET.

20 g/12 månader, months, kuukautta,

mois, maanden, Monate.

MOLUB ALLOY 787

Verify that the bearing sound is normal

PURGING SECTOR

The purging sector, which is adjustable between 0 and 6°, should be set

to suit the pressure differential p1 - p3 in the system (see table below). If

the purging sector of the heat exchanger is set to 0°, a certain volume of

exhaust air will always be transferred to the supply air, and a certain

volume of supply air will always be transferred to the exhaust air by

carry-over. However, these volumes are equal and cancel one another

out. If the purging sector is correctly adjusted to suit the pressure condi-

tions (see the table), complete purging of the rotor will take place without

any loss of supply air.

Angle 1 2 3 4 5 6

Pressure differential

P1-P3 (Outdoor – Extract)

1200 500 320 230 180 150

Exhaust air

Supply air

FläktGroup eQ Master EQRB RHE split rotor Installation and Maintenance Manual

FläktGroup eQ Master EQRB RHE split rotor Installation and Maintenance Manual

FläktGroup eQ Master EQRB RHE split rotor Installation and Maintenance Manual

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