FläktGroup eQ RANGE EQRB RHE whole rotor Installation guide

Brand: FläktGroup

Model: eQ RANGE EQRB RHE whole rotor

Type: Installation guide

Checks before starting the heat exchanger

–

The fans must not be run during the construction

period if the heat exchanger is not running.

– Also make sure that the appropriate filters have

been fitted.

– The rotor is free to rotate.

– The peripheral seal of the rotor is in contact with

the partition, and that the gap is the same

(approx. 8 mm) all around.

– The horizontal seal is lightly in contact with

the rotor all around.

– There is no significant damage to the rotor face.

– To prevent damage of the rotor surfaces, make

sure that no foreign objects have been left inside.

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 opera-

tes during 1 minute before the supply fan is started.

Size 005-018

Size 020-072

ROTARY HEAT EXCHANGER

SIZE 005-018, 020-072

INSTALLATION AND MAINTENANCE INSTRUCTION

FläktGroup DC_9112GB 20220921_R1 Specifications are subject to alteration without notice

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.

ROTARY HEAT EXCHANGER

Installation and maintenance instruction

FläktGroup DC_9112GB 20220921_R1 Specifications are subject to alteration without notice

ROTOR SEALS

The EQRB rotor cassette is fitted with sealing strips equipped with

synthetic bristles with intervening plastic foil. The sealing strips

are fitted along the rotor periphery and seal there against the

inside of the facing plate,

partially along the inside of

the dividing beam (Sizes 005 – 018)

or top (Size 020-072)

Adjustment of sealings:

Size 005-018. The sealings are fixed mounted.

Size 020-072 – Adjustment is possible. When commissioning

check that the rotor is running true and that the seals are tight.

Otherwise the rotor must be adjusted. See the following instructions:

TO ADJUST THE PERIPHERAL SEAL EQ, SIZES 020-072

The rotor shaft is mounted in eccentric shaft mountings.

These can be turned individually to angle the shaft and thus also

the rotor in order to ensure that the sealing gap is uniform all

round. Adjustment to only one shaftmounting is normally suffi-

cient.

Proceed as follows:

1. Back off the locknut and locking screw on the front beam of

the shaft mounting which is mosteasily accessible.

2. When the gap is equal all round, tighten the locking screw and

refit the centre seal.

Clearance between partion and rotor ca 8-10 mm

3. The centre seal is resettad by loosing the bolts or the top on

the beams and more the sealing holder to current positioning,

tightening all bolts.

EURA 1;2

Perfiperal seal

Centre seal

Set screws

Rotor support

 

ROTARY HEAT EXCHANGER

Installation and maintenance instruction

FläktGroup DC_9112GB 20220921_R1 Specifications are subject to alteration without notice

DRIVE UNIT

The drive unit of the EQRB rotor cassette consists of a motor base

plate, drive motor with belt pulley for round drive belt, motor base

plate, and the necessary cables and speed controller, is fitted.

For sizes 005-018 are the engine mounted on the front panel.

For the size 020 to 050 and 054, 063, 072 units, the drive

motor is secured by screws directly to the motor base plate.

When doing larger service of the drive or rotor it is recommended

to remove the whole motor bracket by loosening the bolts.

After having correctly refitted and secured the motor, fit the

drive belt around the belt pulley. The drive belt does not require

re-tensioning.

TO CHANGE THE ROTOR BEARINGS EQRB,

SIZES 005 – 018

A. Withdraw the cassette from the Air Handling Unit casing just

so far that the rotor shaft retaining screw is accessible.

Remove the drive belt from the motor pulley.Then dismantle

the motor base plate, centre spacer, rotation monitor and

the speed controller mounting bracket.

B. Block up the rotor and back off the shaft retaining screws.

Then dismantle one centre beam.Withdraw the rotor shaft.

The rotor can now be rolled out of the cassette.

C. The worn bearings can now be tapped out of the rotor hub.

D. Clean the bearing positions and the inside of the bearing

casing to remove old grease and fit new bearings. If you first

chill the bearings, this will make it easier to fit them. Use an

intermediate ring in front of the bearing to prevent bearing

damage.

E. Roll the rotor back to its position inside the cassette and refit

the other components in the reverse order.

Intermediate ring

Important!

Mark the position of the centre beam.

If it is mounted in wrong position the purging

sector dont work properly.

ROTARY HEAT EXCHANGER

Installation and maintenance instruction

FläktGroup DC_9112GB 20220921_R1 Specifications are subject to alteration without notice

TO CHANGE THE ROTOR BEARINGS EQRB,

SIZES 020 – 050, 054, 063, 072

AA. Withdraw the cassette from the Air Handling Unit casing

just so far that the rotor shaft retaining screw is accessible.

Remove the drive belt from the motor pulley. Then dismantle

the stay, if fitted, the motor base plate, centre spacer, rotation

monitor and the speed controller.

BB. Block up the rotor and remove the locking nuts and locking

bolts of the shaft mount as shown in figure BB.

CC. Tap the rotor shaft out of the hub without damaging the

shaft. Use a soft rod made of brass or the like!

Place the two spacer rings at a safe location and clean

them if necessary. These rings are seated between

the framework and the bearings.

DD. Then replace the bearings as described in Items C and D in

the previous section (sizes 005-018).

EE. Refit the details in the reverse order.

Set screws

Locking bolts

(loose slightly)

Important!

After you have fitted new bearings, adjust

the rotor as described. See page 2.

SHAFT ADJUSTMENT EQRB, SIZES 020 – 050

The rotor position is factory-preset and normally does not need

any adjustment. However, adjustment may be necessary in

certain cases, for example after fitting new bearings. The rotor

position is simple to adjust provided that the recommended

inspection sections have been arranged. Otherwise, the cassette

will have to be withdrawn out of the AirHandling Unit.

A. Back off the locking nut and the lockingbolt. Adjust the

adjusting nuts to centre the shaft in the hole in the centre

support. Do this on both sides of the frame. Tighten the lock-

ing bolts applying a torque of 50 Nm. The shaft is now in its

initial position. Now check that the rotor is correctly posi-

tioned. If so, secure the locking bolt by means of the locking

nut on both sides. If not, proceed with step ”B”.

B. Ascertain in which direction the rotor runs out.

Slightly loosen the bolts. Use the set screws to adjust

the rotor in proper positioning. Tightening the bolts applying

a torque of 50 Nm. Recheck the position of the rotor. If the

rotor is centered, secure the locking bolts and tightening

the set screws.

C. Slightly loosen the bolts on inside, top and bottom at the axis

holder that is easiest to reach. Adjust by hand. Tightening

all bolts.

Set screws

Locking bolts

(loose slightly)

Locking bolts

incl. bottom

(loose slightly)

Shaft screw

ROTARY HEAT EXCHANGER

Installation and maintenance instruction

FläktGroup DC_9112GB 20220921_R1 Specifications are subject to alteration without notice

TO CHANGE THE DRIVE BELT

Due to wear, it may be necessary to change the drivebelt.

The original belt has a welded joint. The replacement belt is jointed

together by means of the pin supplied with it. The correct replace-

ment belt with correct length can be selected from the spare

parts list. 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 recommended equipment is used

for monitoring and purging operation.

SERVICE SCHEDULE

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 The EQRB has permanently

lubricated bearings.

Monitoring

equipment

12 months Check the performance.

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 inadequate (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 satis-

factory 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.

BEARINGS

The EQRB is equipped with permanently lubricated bearings

for which no maintenance is needed. Check that the bearing

sound is normal.

PURGING SECTOR

The EQRB has a fixed purging sector and no adjustment is

necessary.

IMPORTANT!

Never use methyl ethyl ketone, acetone

or other agressive solvents.

FläktGroup eQ RANGE EQRB RHE whole rotor Installation guide

FläktGroup eQ RANGE EQRB RHE whole rotor Installation guide

FläktGroup eQ RANGE EQRB RHE whole rotor Installation guide

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