Exhausto VEX4000 Technische Daten

VEX4000

Maintenance Instructions

Original instructions

3005236-2015-05-19 VEX4000_Maintenance Instructions

EXHAUSTO A/S

Odensevej 76

DK-5550 Langeskov

Tel.: +45 65 66 12 34

Fax: +45 65 66 11 10

[email protected]

www.exhausto.com

1. After commissioning

1.1. After 2-3 weeks of operation ................................................................................3

1.1.1.Check and if required, shorten the rotor belt's length (applies only to VEX4070

- 4100).......................................................................................................................3

1.1.2.Rotor section - check for shavings in the bottom.............................................4

2. Maintenance 2.1. General information about maintenance.............................................................5

2.2. Maintenance Schedule..........................................................................................6

2.2.1.Replacement of filters .....................................................................................7

2.2.2.Removing motor (ZerAx® fan) ........................................................................7

2.2.3.Fitting the motor (ZerAx® fan) ........................................................................9

2.2.4.Removal the plenum fan................................................................................10

2.2.5.Fitting the plenum fan ....................................................................................13

2.3. Cleaning................................................................................................................14

2.3.1.Sections in general.........................................................................................14

2.3.2.Damper and damper motor............................................................................15

2.3.3.Rotary heat exchanger section (ER)..............................................................15

2.3.4.Crossflow heat exchanger (EX).....................................................................16

2.3.5.Electric heating coil (HE, HCE)......................................................................16

2.3.6.Water heating coil (HW, HWR)......................................................................16

2.3.7.Cooling coil (CW, CWC).................................................................................16

2.3.8.Condenser (DX, DXC)....................................................................................17

2.3.9.Integrated cooling IC/ICC...............................................................................17

2.3.10.Fans (FANE, FANS).....................................................................................17

2.3.11.Especially for outdoor units. ........................................................................18

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1.After commissioning

1.1After 2-3 weeks of operation

1.1.1Check and if required, shorten the rotor belt's length (applies only to VEX4070 - 4100)

Step Action

1 After 2-3 weeks of operation:

●Check the distance X from the drive shaft on the rotor belt pulley to

the bottom of the section and compare with the following dimensions:

VEX4070: 175 mm ±15 mm

VEX4080: 195 mm ±15 mm

VEX4090: 195 mm ±15 mm

VEX4100: 198 mm ±15 mm

2If the measured distance is greater than the stated values,

the rotor belt must be shortened.

3●Put tape on both sides of the assembly fixture before loosening the

belt.

4●Loosen the fixture using a screwdriver and shorten the belt.

NB: Shorten one hole at a time, and immediately measure X,

because it is important that the belt does not become too

short.

5●Refit the belt again via the fixture. Remove the tape and re-check X to

ensure it is correct.

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1.1.2Rotor section - check for shavings in the bottom

Step Action

1 After 2-3 weeks of operation:

●Check for shavings in the bottom of the rotor section and if so, remove

them by vacuum cleaning. Shavings can come from the belt or from

the manufacture of the rotor.

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2.Maintenance

2.1General information about maintenance

It is important that the VEX4000 air handling unit is regularly maintained, so that its

output is optimal at all times. This chapter describes how and when recommended

maintenance should be carried out, which components should be checked and how to

replace certain parts, etc.

Opening the air han-

dling unit Do not open the service doors until the supply voltage has been

disconnected at the isolation switch (OFF position) and the fans

have stopped. The isolation switch is located on the door of the

heat exchanger section. Once the isolation switch is in the OFF

position, the light inside the VEX can be switched on and the serv-

ice socket in the panel can be used. Everything else on the VEX is

de-energised.

There is an extra separate built-in isolation switch on the door to

the electric heating coil. Units with electric heating coils therefore

have two isolation switches, both of these must be in the OFF po-

sition to ensure the unit is de-energised.

NB: Before opening the doors, ensure that the air handling unit has

stopped operating for at least five minutes, because the fans have

run-on time.

Locked doors The doors are opened using the square key.

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2.2Maintenance Schedule

State of the unit/component Procedure Once a

year Twice a

year

Filters* Change when the display shows the filter alarm.

Recommended that both filters are replaced at the

same time.

NB: The control system will give an "early warning"

when a filter is becoming soiled, so that there is time

to obtain a new filter or to call a service technician.

The filter should be changed at least

Fans/vibration dampers Check:

●fans, vibration dampers and tightness of seals.

●for occurrence of abnormal sounds or vibrations.

Vibrations may be due to dust accumulation on

the fan impellers and in general, will cease after

cleaning. If not, then check bearings and for im-

balance on the fan impeller.

Air intake Ensure the air intake is free of foreign bodies, such as

paper, leaves, etc. X

Filter monitor Check X

Seals and sealing strips Check that all the seals are tight. X

Heating coil (accessory) Check

Cleaning. See next sections. X

Rotary heat exchanger Check

Cleaning, as required, see next sections. X

Crossflow heat exchanger Check

Clean as required, see next sections. X

Safety functions check Firethermostats, returnwatersensor, smokedetector X

Damper Function check X

Motor valve and circulation

pump (accessories) Function check X

Integrated cooling machine

IC/ICC Mandatory service procedure carried out by author-

ised cooling company X

Water trap (however not Si-

phon water trap) Check water trap and if required, top up with water. X

*Filters Only use original filters

●Theprovided filterdata andpressure dropcurves (seeunder section"Technical

data" in Fitting and Installation Instructions) are based on the use of original

filters.

●Eurovent certification is only valid if original filters are used.

●Use of non-original filters may cause leakage in the VEX and impair filter func-

tion.

●EXHAUSTOrecommendsthat youregisterthefilter replacementdatetoensure

filters are replaced at the correct intervals.

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2.2.1Replacement of filters

Step Action Illustration

1●Switch off the power to

the unit at the isolation

switch before opening

the doors

●The filters are kept in po-

sition by a rail system,

which is closed using

two handles, one for the

top and one for the bot-

tom.

2●Loosentherailsbypush-

ing the handles towards

the filters.

●The filters can now be

pulled free of the rails

and replaced with new

filters (if required see re-

marks about filters in the

section "Maintenance

Schedule").

2.2.2Removing motor (ZerAx®fan)

Step

(1-11) Action

1Switch off the power to the air handling unit at the isolation switch before

opening the doors.

2Wait for a minimum of two minutes before opening the

doors, because the fan has approximately two minutes of

run-on time.

3 Open the door to the fan section.

4 Remove the screws in the supports in the bottom of the fan unit.

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Step

(1-11) Action

Loosen the flexible connection.

6 Pull the fan out and provide it with appropriate support.

7Remove the three screws (pos. 1) that hold the hub cover and detach the

cover (pos. 2).

1 2 3 4 67a 9 10 85 7b

1. Three screws - 2. Hub cover - 3. Centre screw - 4. Centre washer - 5.

Hub cores - 6. Fan impeller - 7a. Nuts - 7b. Bolts - 8. Motor - 9. Cabinet

- 10. Vane

When working on the fan, the individual parts must be han-

dledin awaythat avoidsanyimpacts. Impacts candamage

the motor bearings and other fan parts.

8Remove the centre screw (pos. 3) in the fan impeller and centre washer

(pos. 4).

9Remove the fan impeller using a puller fixed in the two threaded holes in

the hub core (pos. 5).

10 Remove the motor from the motor bowl by removing the nuts and bolts

(pos. 7a and 7b).

11 Remove the motor (pos. 8). The motor and fan unit are now ready for

servicing.

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2.2.3Fitting the motor (ZerAx®fan)

Step

(1-11) Action

1 2 3 4 67a 9 10 85 7b

1. Three screws - 2. Hub cover - 3. Centre screw - 4. Centre washer - 5.

Hub cores - 6. Fan impeller - 7a. Nuts - 7b. Bolts - 8. Motor - 9. Cabinet

- 10. Vane

When working on the fan, the individual parts must be

handled in a way that avoids any impacts. Impacts can

damage the motor bearings and other fan parts.

Thelocking washersandnuts should bereplacedonce the

fan is assembled.

1 Fit the motor (pos. 8) and check that the motor shaft is positioned con-

centrically in the cabinet.

2 Fit and tighten bolts and nuts (pos. 7a and 7 b).

3 Fit the fan impeller (pos. 6) on the motor shaft using the tool which is

secured in the threaded hole on the motor shaft. The hub on the fan

impeller must be tightened up to the stop on the collar of the motor shaft.

Check that the fan impeller can turn freely.

4 Fit the centre washer (pos. 4) using the centre screw (pos. 3).

5 Fit the hub cover (pos. 2) using the three screws (pos. 1).

6 Connect the motor cable.

7 Push the fan unit into position.

8 Fit the flexible connection.

9 Secure the fan unit using screws in the supports.

10 Close the door to the fan section. Close the door and lock using the

square key.

11 Before starting up the fan, see the assembly and installation instructions

for VEX4000.

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2.2.4Removal the plenum fan

Step

(1-11) Action

1●Switch off the power to the air handling unit at the isolation switch before

opening the doors.

2Wait for a minimum of two minutes before opening the doors,

because the fan has approximately two minutes of run-on time.

3●Open the door to the fan section.

4●Remove the EXcon FanIO module from the plate it is fitted to.

●Cut the strips for the conductors/cables, so the module incl. conductors/

cables can be placed in the bottom of the section.

5●Remove the four bolts at the front of the rail system.

6●Cut the strips for the air hose, which runs below the rail and up into the

fan motor.

7●Cut the strips for the cables, which run up into the fan motor.

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