flakt woods VEKA Maintenance and service guide

Supply air unit VEKA
Installation & Maintenance
November 2008
AIRTREND Ltd
Predstavništvo u Beogradu
Kumanovska 14, 11000 Beograd
Tel: [phone]
Faks: 011/3444113
e-mail: [email protected]
web: www.airtrend.rs

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
3
Safety instructions
Operating the air treatment unit and accessory components
WARNING
Before the air treatment unit is taken into service, any free connections must be provided
with protective nets.
The air treatment unit must also not be taken out of service until all electrical and mecha-
nical safety devices have been fitted.
If any interventions are required, check that the voltage supply to the unit is interrupted. Note that
any electrical air heaters have a separate electrical supply, which is not interrupted via the air treat-
ment unit’s main switch.
Great care must be taken when opening the venting connections for heating water to an air heater.
Risk of fluid hammering.
In conjunction with service or inspection, the main switch of the unit must be turned off before ope-
ning the inspection doors. Before restarting, all safety devices must be refitted.
A free space (safety distance) must be maintained in front of electrical heaters and electrical control
cabinets according to the applicable electrical safety regulations.
Use the control display to stop the unit.
The unit’s hatches are provided with a locking handle. Ensure that the unit is always left in the
locked position.
Inspection hatches on filter/fan parts must not be opened when the unit is running, in view of the
major risk of overloading the fan motor. There is also a risk of personal injury or damage to the fan
due to objects being sucked in.

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
Inspection intervals
The service chart includes the service and inspection
operations to be performed on functional components that
may be part of an air handling unit. The unit contains one or
more of these functional components.
Any components that are not relevant may be deleted from
the service chart.
The chart shall be dated and signed each time servicing
is carried out. The length of the service interval is estimated
at 2000 operating hours over a 12-month period and for an
installation providing a normal comfort level.
In environments with a high level of dust in the supply
air or exhaust air, inspection of the air handling unit shall be
performed at more frequent intervals.
Follow the service chart below and fill in operations carried
out.
Replacement material
1. Damper
- Gasket
2. Filter
- Gasket
- Filter cassette
3. General
- Cut-outs
- Top up manometer fluid as required.
Service chart
Applicable from. 20...... to 20.......
3-month-service / 9-month-service 6-month-service 12-month-service
Symbol Operation Mon.
Date Operation Date Operation Date
Sign. Sign. Sign.
Air treatment Cleaning Cleaning Cleaning
unit 3
9
3
9
3
9
3
9
3
9
3
9
Filter Check pressure drop Check pressure drop Check pressure drop
and need for filter and need for filter and need for filter
replacement. replacement. replacement.
Fan General inspection. General inspection.
Clean impeller wheel
cover and unit casing.
Check bearings.
Air heater General inspection Clean finned body. Clean finned body
Air cooler drainage box
and casing.
Damper Check function and Check function and Check function and
gasket. gasket. gasket.
Replace gasket Replace gasket Replace gasket
if required. if required. if required.
Sound attenuator Cleaning as required.
Cleaning as required. Cleaning as required.
Casing Check door packings.
Inside cleaning
as required.
Symbol Aggregat
Symbol Filter 2
Symbol Fläkt
Symbol spjäll
Symbol luftkylare
Symbol luftvärmare
Symbol Ljuddämpare

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
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Installation/Care
Lifting and transport
Every component part of the unit is supplied with
4 fixing eyes. These can be used for lifting and
transport. They are screwed into the corners as
illustrated in fig 1.
Suspension from the ceiling
The fixing eyes referred to above are used by
passing hangers through the eyes, as illustrated in
fig 2. The hangers are not included in the supply.
Note that the weight of the unit is distributed une-
venly in the longitudinal direction.
Fastening irons of the kind illustrated in fig 3 can
be used instead of hangers.
Electrical heater VEEK and Sound attenuator VELD
are suspended in the same way as other ducts.
Suspension on a wall
Units without an air cooler can be mounted with a
vertical airflow.
Screw a rail or an angle bracket to the wall to
carry the unit. See fig 4.
VEKA
Fig 1
Fig 3
Fig 2
Fig 4

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
Installation of cut-off damper VEKV.
Cut-off damper VEKV is installed on the unit part
with 4 x M8 screws (not supplied), as illustrated in
fig 5.
If the damper is frame-insulated, the flange of the
damper must be made accessible by removing the
insulation.
Connection to duct
Connection to the duct can be made with a Flexible
sleeve VEKZ-51, Counter-flange VEKZ-52 or Duct
connection sleeve VEKZ-53. See fig 6.
Water connection of air heater and air
cooler.
The water connection is DN 25 with an external
thread.
The inlet and outlet are marked with signs show-
ing the direction of flow.
The air heater is provided with a DN 8 internal
thread for a frost protection sensor.
When connecting the pipes, account must be
taken of the risk of rupture damage; see fig 7.
Pipelines must be laid so that venting can take
place in the pipe system.
Packing Packing (not supplied)
Flexible sleeve VEKZ-51M8 (not supplied)
M8 (not supplied)
M8 (not supplied) PG or flange
Self-tapping screw or blind rivet (not supplied)
Packing Packing (not supplied)
Duct connection sleeve VEKZ-53
Packing Counter-flange VEKZ-52
Installation/Care
Fig 6
Fig 5

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
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Condensate drainage of air cooler
Air cooler drainage connection external Ø 15 mm
for connection to a water trap with a height of at
least 60 mm.
Connection of fan to electricity mains
supply
Electrical connection must be carried out by a
qualified electrician.
Cable penetrations are provided in the side panel of
the unit.
The cable must be rubber insulated and must not
be stretched so that motor vibrations are transmit-
ted to the casing.
A safety switch is positioned in the vicinity of the
fan and must always be used to interrupt the cur-
rent before opening the inspection hatch.
Checks before starting
• Check that the fan outlet is provided with the
necessary outlet protection.
• Check that a qualified electrician has given his
approval for starting.
• Check that the impeller wheel rotates freely and
that no foreign objects are present which may be
sucked in and damage the fan.
Starting
The fan must not be started with the dampers
closed on the suction side or the pressure side.
Brief operation to determine the direction of
rotation of the wheel can be performed with a
hatch open.
Storage before installation
The storage space must not be subjected to vibra-
tions that may give rise to storage damage from the
surroundings.
If the storage period exceeds 3 months, the impel-
ler wheels should be rotated by hand at regular
intervals.
Care
In order for the unit to function reliably year after
year, it must be given correct and continuous care.
The following recommended service chart is based
on approximately 2000 operating hours per year.
Installation/Care
Fig 7.
Function Every 3/9 months Every 6 months Every 12 months
Filter Check pressure Kontroll av Kontroll av
drop. tryckfall. tryckfall
Filter replace- Filter replace- Filter replace-
ment, if required ment, if required ment, if required
Water General inspection Cleaning of Cleaning of
battery finned body finned body
and drain trough.
Fan General inspection General inspection Cleaning of
impeller wheel,
cover and unit
case. General
functional
inspection.

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
Installation
1. The VEEK duct heater is connected to the pressure
side of the VEKA hot air unit.
2. The air flow direction through the electrical
heater must be as indicated by the arrow on the
cover of the heater.
3. VEEK can be mounted in a horizontal or verti-
cal duct. NOTE: Mounting with the connection
box. NOTE: Mounting with the connection box
facing upwards or downwards is not permitted.
4. The distance from or to a duct elbow, damper,
filter or the like should be at least the distance
corresponding to the diagonal dimension of the
heater, i.e. from corner to corner in the duct part
of the heater. There is otherwise a risk of the air
flow through the heater becoming uneven, with
the risk of the overheating protection tripping.
For a duct section with the dimensions 800 x
400 mm, for example, the distance to a duct
elbow, damper, filter or the like should be at
least approximately 900 mm.
5. The heater must be insulated. The insulation
must be executed in an incombustible insulat-
ing material. The insulation must not conceal
the cover, because the rating plate must be
visible and the cover must be capable of being
removed.
6. The VEKA unit should be equipped with a filter.
7. The electrical heater should be installed so that
cleaning is possible after the system has been
taken into service.
An inspection hatch should be installed in the
duct immediately after the electrical heater.
8. A flexible sleeve VEKZ-51 must not be connected
directly to the electrical heater.
9. The position of the electrical heater must be
marked.
10. NOTE. Fit the equalization plate ahead of the fan
opening on the VEKA unit, so that the air flow is
distributed over the electrical rods.
11. The cut-off damper should be provided with a me-
chanically closing damper motor (spring-assisted
return) if a water battery is present in the unit.
12. The air flow through the heater must be at least
0.21-0.23 m3/s (VEEK-20), 0.3-0.34 m3/s (VEEK-30).
Electrical heater VEEK
VEEK-aa-bb-c-d-e-4
Size Output variant Connection Power output External dimension Weight Min air flow Max power
aa bb mm (1-stage), kW mm (BxHxL) kg m3/s consumption at 400V AC
20 11 600x250 9 769x288x800 30 0,225 13
20 12 600x250 15 769x288x800 35 0,225 22
20 13 600x250 21 769x288x800 40 0,225 30
30 23 900x250 24 1069x288x800 48 0,338 35
13. The maximum permissible output air tempera-
ture is +40 °C, and the ambient temperature of
the heater must not exceed +30 °C.
Connection
1. Installation may only be carried out by a qualified
installer. General regulations must be observed in
conjunction with installation and connection.
2. The electrical heater is made for 3-phase alterna-
ting current.
See the electrical wiring diagram for the heater
concerned.
3. The VEEK electrical heater is controlled with
0-10 V and a start signal. VEEK emits an alarm sig-
nal when the manual overheating protector trips.
4. The current to the elements must not be capable
of being switched on unless the associated fan is
started beforehand or simultaneously.
5. The current to the associated fan must not be capa-
ble of being switched off unless the current to the
elements is interrupted beforehand or simultan-
eously. The fan should continue to run for approx-
imately 5 minutes after the current to the electrical
battery is switched off.
6. A permanently installed electrical heater should
be provided with a safety switch.
7. The electrical heater is provided with two overhea-
ting protectors (of which one is reset manually),
intended to prevent overheating at an excessively
low air flow and to prevent overheating in the
event of a fault in the system.
8. Before using the electrical heater, test operation
should be performed after the electrical installa-
tion is complete. Tripping of the manual overhea-
ting protection indicates the presence of a fault in
the installation, which must be corrected imme-
diately. Only then should the protection be reset.
The VEEK electrical heater conforms to the
safety requirements according to SEMKO
111 FA-1982 and is approved under European
EMC standards EN 50081-1 and EN 50082-1.

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
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Electrical heater VEEK
Overheating
Proceed as follows if the overheating protection
with manual resetting trips:
1. Intervention in the electrical heater, such as
removing the cover, must only be performed by
an authorized installer.
2. Disconnect the current
3. Carefully investigate the reason for tripping of
the overheating protection.
4. Once the fault has been corrected, the over-
heating protection can be reset.
Check the following:
1. Is the filter dirty or blocked?
2. Has any fire damper tripped?
3. Is the automatic system (damper function, time
relays, etc.) functioning as expected?
4. Is the fan working?
Filter service
The VEKA unit with an electrical heater requires
regular servicing of the filter in order to function
without problems.
A contaminated filter can cause tripping of the
overheating protection. See the care instructions for
the VEKA unit under the point ”Replacement of fil-
ter”. The electrical heater element is of the rod type,
which reduces the risk of contamination. The unit
should be cleaned internally, therefore, in conjunc-
tion with filter replacement or every six months.
Integrated control STVE (ii=11)
Separate control unit STVE (ii=86)
DDC-control

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
Electric wiring of 3-phase motor
Connection for fixed max speed
With this wiring method, the motor runs at maxi-
mum speed (direct mains connection). Control via,
for example, a clock or manual switch. The motor
has a thermal contact which acts as an overheating
cut-out between the internal connections T1 and T2.
The thermal contact ought to be connected to the start
contact’s control circuit. See diagram 1.
Electric wiring of 3-phase motor
By straight connecting of the motor it runs with maxi-
mum speed. The thermal overload relay needs to be
connected to the control circuit of the starting relay.
If the safety switch STVZ-66-2-1 is factory mounted
the connection is done according to diagram 2.
The start up of the unit
The unit is equipped with a sensor and manometer
connections for air volume measuring. The pressure
difference has to be measured and the corresponding
air flow is shown in the diagram. The motor should
not be overloaded by running air volume which are
outside the allowed range shown in the fan chart see
VEKA catalogue.
At max. speed the nominall current value stamped
on the motor plate may not be exceeded.
Please notice instructions shown in the installation
instructions and the brochure.
Guarantee terms do not cover damages caused by
neglections of instructions.
Connecting the frequency inverter STRF
VEKA-20 and 30 with 3-phase motors can be speed
controlled with the loose supplied frequency inverter
STRF. The connection strap in the motor’s connec-
tion box should be set out as in diagram 3 before the
frequency inverter is connected. The connection of the
frequency inverter is then made as set out in the same
diagram. The frequency inverter should be connected
to 230 V 1-phase.
Thermal Cut-out/Alarm
The fan motors in the VEKA-20 and 30 are equipped
with an integrated thermal cut-out, which is connected
so that the fan stops when overheating. The cut-out
should also give an alarm. To be used in cases when
the fans are not controlled with frequency inverter.
STRF
Diagram 3. Connection of frequency inverter STRF
Diagram 1. Connection for max speed
Diagram 2. Connection of 3-phase motor

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Supply air unit VEKA INSTALLATION & MAINTENANCE
Fläkt Woods 8514 GB 2008.11 Subject to alteration.
VEKA
Flow indicator VEKZ-27-1
Flow indicator systematic error is +/- 10%, on con-
dition that the installation and care instructions are
observed.
Flow indicator indicates a pressure drop in Pa. A
sign with a conversion to m3/s is supplied separa-
tely.
Installation
Install the indicator vertically on a wall or on the
side of the unit with the screws supplied.
Adjust the indicator in the horizontal sense.
Filling with liquid
Follow the instructions supplied in the indicator
carton.
Hose connection
Cut the supplied hoses to a suitable length and
install them between the nipples on the unit side
and the indicator. Clip the hoses securely in place
so that they are not damaged or kinked.
Temperature correction
The pressure scale on the indicator does not apply
to air at a temperature of +20°C. At other air tem-
peratures, the pressure must be corrected with the
formula:
where p = the actual pressure, p20 = the indicated
pressure and t = prevailing temperature in °C.
(273 + t)
293
p = p20 .m3/s