System air DKEX Series Troubleshooting guide

Document in original language | 141815 · A002
Explosion proof fans
KTEX/DKEX – Presafe 17 ATEX 9970 X
Operation and Maintenance Instructions GB

141815 | A002
© Copyright Systemair AB
All rights reserved
E&OE
Systemair AB reserves the rights to alter their products without notice.
This also applies to products already ordered, as long as it does not affect the previously agreed specifications.

141815 | A002
Contents
1 EU Declaration of conformity . .. .. ... .. .. .. .. .. ... .. .. .. .. ... .. 1
2 Safety information... .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. .. ... .. 2
2.1 Specific conditions for safe use (1-5) . ... .. .. .. .. .. .. 4
3 Transport and storage.. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. ... . 4
4 Technical data. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. ... .. 5
4.1 Dimensions DKEX . ... .. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. . 5
4.2 Dimensions KTEX .. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. . 6
4.3 Wiring . .. .. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. ... .. .. .. .. .. 7
4.3.1 Cabling . .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. ... .. 7
4.3.2 Sample motor protection . .. .. .. ... .. .. .. .. . 7
4.3.3 Sample wiring . .. ... .. .. .. ... .. .. .. .. .. .. ... .. 7
5 Installation ... .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. ... .. .. .. .. .. .. . 8
5.1 Installation example . . . .. . .. . .. .. . .. . .. . .. . .. . .. .. . . .. .. 9
6 Checklist .. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. .. 10
7 Commissioning. .. .. . .. .. .. .. .. .. . . . .. .. .. .. .. .. . . . .. .. .. .. .. .. 10
8 Maintenance .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. . 11
9 Other .. .. .. .. .. .. .. ... .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. .. .. .. .. 12
9.1 Name plates DKEX. .. .. .. .. .. ... .. .. .. .. .. .. ... .. .. .. . 13
9.2 Name plates KTEX . . .. .. .. .. .. .. . . . .. .. .. .. .. . . . .. .. .. 14

EU Declaration of conformity | 1
1 EU Declaration of conformity
Manufacturer
Systemair Sverige AB
Industrivägen 3
SE-739 30 Skinnskatteberg SWEDEN
Office: [phone] Fax: [phone]
www.systemair.com
The manufacturer hereby declares that the following products:
Centrifugal fans DKEX/KTEX
EU-type Examination Certificate (ATEX) Presafe 17 ATEX 9970 X DNV Nemko Presafe AS (2460)
Quality Assurance Notification (ATEX) Presafe 16 ATEX 8871 Q DNV Nemko Presafe AS (2460)
(The declaration applies only to a product in the condition that it was delivered in and that was installed in the facility in
accordance with the included installation instructions. The insurance does not cover components that are added or ac-
tions carried out subsequently on the product).
Comply with all applicable requirements in the following directives:
• ATEX Directive 2014/34/EU
• Machinery Directive 2006/42/EC
• EMC Directive 2014/30/EU
The following harmonized standards are applied in applicable parts:
EN 60 079-0:2012/A11:2013 Explosive atmospheres — Part 0: Equipment - General requirements.
EN 60 079-7:2015 Explosive atmospheres — Part 7: Equipment protection by increased safety ''e''.
EN 14986:2007 Explosive atmospheres — Design of fans working in potentially explosive
atmospheres.
EN ISO 12100:2010 Safety of machinery - General principles for design - Risk assessment and risk
reduction.
EN 13857 Safety of machinery - Safety distances to prevent hazard zones being reached
by upper and lower limbs.
EN 61000-6-2 Electromagnetic compatibility (EMC) – part 6-2: Generic standards - Immunity for
industrial environments.
EN 61000-6-3 Electromagnetic compatibility (EMC) – part 6-3: Generic standards - emission
standard for residential, commercial and light-industrial environments.
Skinnskattberg 24–04–2017
Mats Sándor
Technical Director
141815 | A002

2| Safety information
2 Safety information
Danger
• Before maintenance, service or repair cut the power supply (all-pole breaker) and the impeller to stop.
• Mounted safety equipment must not be removed, bypassed or be disabled!
• Cleaning with a damp cloth when the fan is energized can cause electric shock!
• The fans may have sharp edges and corners, which can cause cutting injuries.
• Wear safety shoes and gloves for handling!
The installation instructions are part of the product and should be stored so that it is always available. The manufacturer
of the system or the plant is responsible for the installation and that safety instructions are compliant with the applica-
ble regulation.
DKEX/KTEX are certified according to ATEX Directive. Fan Category for fans is BV3 quality grade G6.3 according to ISO
14694. The field of explosion protection is stated on the fan rating plate (for example Exe IIB T3). The fan fulfils the re-
quirement for zone 1 but does not separate zones. Fan may be used in explosive environments for the transport of gas,
but not the transport of hot fumes.
The fans are designed for transport of air or explosive atmospheres in Zone 1 and Zone 2. Transport of solids, shares of
solids or mixtures of dust/air is not allowed. The transported air must not corrode the fan housing, fan blades or motor
(aluminium and steel). Rust particles may not occur in the airflow.
Resonance vibrations can occur due to mounted components and should be checked during commissioning.
The fans must not be installed outdoors.
Installation, electrical connection and commissioning may only be performed by qualified personnel and in accordance
with applicable requirements and regulations for electrical installations in areas with explosive atmospheres.
Installation, inspection and maintenance in accordance with EN 60079-14/-17 are considered to meet the require-
ments. Fan must be installed and protected against foreign objects that come in contact with moving parts and may
cause sparks.
No moving parts should be accessible after installation (EN ISO 13857).
Inspection and cleaning should be done regularly, cleaning of deposits will prevent imbalance of the impeller. The pan-
els that holds the fan can be relative heavy. Make sure that all the parts are correctly reassembled after inspection/
cleaning (see chapter 8).
Protective earth (PE) must be connected, the external ground wire connection is placed on the motor. Electrical connec-
tions must be made according to the wiring diagram. When the fan is controlled the current can increase at regulated
voltage, the power must never exceed the rated power, see table 1. Data provided on the rating plate applies to air with
density of 1.2 kg/m3.
Use of electronic or transformer based control devices is permitted. Motors are equipped with PTC resistors in triple ex-
ecution. More than two PTC resistor chains may not be connected in series, as this can lead to indefinite suspension.
Max. test voltage of PTC resistors are 2.5 V.
Inspection and maintenance of the temperature monitoring unit shall be made according to instructions and according
to a time interval specified in the certificate and instruction manual of the temperature monitoring device.
Motors are supplied with open drain holes.
Important
• DKEX/KTEX must be installed with an EX certified temperature monitoring unit.
• Speed control using frequency inverter is not permitted.
• Current dependent protection is not permitted and must not be used as secondary protection either.
• The fan current/power must not exceed the current/power specified on the fan rating plate at rated
voltage. By increasing the static back pressure the fan can be throttled up to a lower current/power if a
speed control is not in use.
141815 | A002

Safety information | 3
Table 1
Rated data Min. static back pressure (Pa) Fan type Voltage/Frequency P
(kW)
I
A1rpm
min-max
Isol.
Class
Weight
kg
Min. flow
m3/h
Max. flow
m3/h
Imax
Cntrl.(A) 1
1 2 3 4 5
KTEX 50-25-4
230V(Δ) 3~ 50Hz 0,5 1,52 500–1470 F 17,0 200 1800 1,64 0 0 0 40 110 380-400V(Y) 3~ 50Hz 0,5 0,88 500–1470 F 17,0 200 1800 0,95 0 0 0 40 110
KTEX 50-30-4
230V(Δ) 3~ 50Hz 0,9 3,1 470 - 1490 F 22,5 200 2560 3,27 0 0 0 0 40 380-415V(Y) 3~ 50Hz 0,9 1,8 470 - 1490 F 22,5 200 2560 1,9 0 0 0 0 40
KTEX 60-30-4
230V(Δ) 3~ 50Hz 1,3 3,9 415 - 1450 F 30,5 200 3150 4,35 0 0 30 105 250 380-415V(Y) 3~ 50Hz 1,3 2,25 415 - 1450 F 30,5 200 3150 2,5 0 0 30 105 250
KTEX 60-35-4
230V(Δ) 3~ 50Hz 2,1 6,8 590 - 1480 F 35,5 200 3750 8,0 0 0 0 0 225 380-415V(Y) 3~ 50Hz 2,1 3,9 590 - 1480 F 35,5 200 3750 4,6 0 0 0 0 225
KTEX 70-40-6
230V(Δ) 3~ 50Hz 1,6 6,2 330 - 985 F 48 200 5100 6,5 0 0 0 0 0 380-415V(Y) 3~ 50Hz 1,6 3,6 330 - 985 F 48 200 5100 3,76 0 0 0 0 0
DKEX 225-4
230V(Δ) 3~ 50Hz 0,5 1,52 490 - 1470 F 13,0 200 1800 1,64 0 0 0 55 125 380-400V(Y) 3~ 50Hz 0,5 0,88 490 - 1470 F 13,0 200 1800 0,95 0 0 0 55 125
DKEX 250-4
230V(Δ) 3~ 50Hz 0,9 3,1 460 - 1470 F 17 200 2600 3,27 0 0 0 10 60 380-415V(Y) 3~ 50Hz 0,9 1,8 460 - 1470 F 17 200 2600 1,9 0 0 0 10 60
DKEX 280-4
230V(Δ) 3~ 50Hz 1,3 3,9 390 - 1475 F 24 200 3150 4,35 0 0 45 155 300 380-415V(Y) 3~ 50Hz 1,3 2,25 390 - 1475 F 24 200 3150 2,5 0 0 45 155 300
DKEX 315-4
230V(Δ) 3~ 50Hz 2,1 6,8 555 - 1495 F 35,5 200 3850 8,0 0 0 15 40 300 380-415V(Y) 3~ 50Hz 2,1 3,9 555 - 1495 F 35,5 200 3850 4,6 0 0 15 40 300
DKEX 355-6
230V(Δ) 3~ 50Hz 1,8 6,5 310 - 980 F 39 200 5300 6,5 0 0 0 0 0 380-415V(Y) 3~ 50Hz 1,8 3,76 310 - 980 F 39 200 5300 3,76 0 0 0 0 0
Step 1 2 3 4 5 Voltages 230V 1~ 80V 105V 130V 160V 230V Voltages 400V (Y) 3~ 95V 145V 190V 240V 400V Voltages 230V 3~(Δ) 55V 85V 110V 140V 230V
1The current may only exceed the rated currents on the rating plate by the ratio (%) given as long as the total power consumption does not exceed the rated power given.
141815 | A002

4| Transport and storage
2.1 Specific conditions for safe use (1-5)
1. The fan’s rating plate displays the fan’s data at rated voltage. In order for the fan’s permitted current and power con-
sumption not to be exceeded the fan may need to be pressurised with a minimum back pressure according to table
1.
2. PTC protective circuits in the motors must be connected to monitoring apparatus certified according to ATEX Directive
that isolates the motor from voltage supply immediately when activated.
3. When fans are installed in a duct system, the duct system must meet enclosure classes IP20 at the inlet and outlet.
Components that contribute to the enclosure protection must be of suitable material and durability.
4. Fans are only intended for fixed installation. The motors’ connection cable on KTEX is secured with cable ties in order
to guide the cable correctly in relation to the hinge on the hatch. Attachment must be carried out so that the cable
can still be extended after fixing without the cable insulation being damaged.
5. Ambient temperature and temperature of transported air should remain within the range –20 to +40 °C. Fans must
not be run at flows below 200 m3/h at ambient temperature of 20 °C. There is otherwise a risk that the exhaust tem-
peratures are higher than the permitted ambient temperature.
Table 2 Table rating and ambient temperature
Model Phase Supply voltage Tamb
KTEX 50-25-4
3
230V (Δ) AC 50Hz
–20°C to +40°C
DKEX 225-4 380-400V (Y) AC 50Hz
KTEX 50-30-4—KTEX 70-40-6 230V (Δ) AC 50Hz
DKEX 250-4—DKEX 355-6 380-415V (Y) AC 50Hz
3 Transport and storage
The fan is packed at the factory to withstand normal handling during transit. Avoid blows and shock loads. Store the fan
in a dry, dust-free place without damaging vibrations (v eff <0.2 mm/s) to avoid bearing damage. Avoid long storage
periods (we recommend max.1 year). Before installing the fan, check the motor bearings for noise (spin the impeller
carefully by hand).
Caution
• When handling the goods, use suitable lifting equipment in order to avoid damage to fans and personnel.
• Do not lift the fan in any cable, junction box or the impeller.
141815 | A002

Technical data | 5
4 Technical data
4.1 Dimensions DKEX
AB
G
E
D
C
F
I
1
Model A B C D E F G I 1
DKEX 225 280 133 145 196 196 367 445 337
DKEX 250 315 154 165 216 243 410 492 375
DKEX 280 357 169 180 230 248 453 547 413
DKEX 315 400 188 203 254 276 515 615 465
DKEX 355 450 213 227 278 320 574 689 489
1Minimum dimensions to remove the motor out of casing
141815 | A002

6| Technical data
4.2 Dimensions KTEX
A
D
E
F C B
G
H 1
8.0
ø10.0 (8x)
I 2
Model A B C D E F G H 1I2
KTEX 50–25 498 248 270 520 540 290 532 34,5 610
KTEX 50–30 498 298 320 520 540 340 562 34,5 695
KTEX 60–30 598 298 320 620 640 340 642 52 715
KTEX 60–35 598 348 370 620 640 390 717 54,5 805
KTEX 70–40 698 398 420 720 740 440 787 50 900
1Dimensions from the motor bolts
2Dimensions with fully opened hatch
141815 | A002

Technical data | 7
4.3 Wiring
4.3.1 Cabling
9–wire cable 6–wire cable
L1 L2 L3
400V3~ (Y)
L1 L2 L3
230V3~ (D)
TP TP W2 U1 U2 V1 V2 W1 TP TP W2 U1 U2 V1 V2 W1
L3
400V3~ (Y) / 230V3~(D)
TP TP
L1 L2
U V W
4.3.2 Sample motor protection
Us = supply voltage H1 = indicator lamp fault
S1 = off switch F1-F4 = fuses
S2 = push button on K1 = contactor
S3 = push button external reset TP = PTC thermistor
4.3.3 Sample wiring
L1
L2
L3
N
L1
L2
L3
N
A1
A2
T2 T1
14 11 12
U-EK230E
A1
A2
T2 T1
14 11 12
U-EK230E
K
L1 L2 L3
TPTP L1 L2 L3 TPTP
M
3~ D/Y M 3~ D/Y
L1 L2 L3 N
RTRD/U
U1 V1 W1 TK TK
141815 | A002

8| Installation
5 Installation
Always read the safety information before installation. The fan is intended for fixed installation. Installation requires an
inspection of the hazardous area to be done according to applicable regulations and classification standards (within the
EU, EN 60079-10).
Installation according EN 60079-14 deemed to meet the installation requirements in the EU. Compliance with the Direc-
tive 2014/30/EU "Electromagnetic Compatibility" applies only when the product is directly connected. Integrated into
an electrical system or combined with other components (e.g. controls/control equipment) the installer/plantholders
are responsible for compliance.
The installation must be set up at a safe distance to transmitter units or protected with suitable screens.
Before starting installation check for any transport damage and that the impeller do not touch parts of the fan housing
(distances must not be less than 3 mm at any point). Ambient temperature and the conveyed air temperature should
be between -20°C and +40°C. DKEX/KTEX are intended for continuous operation within the specified temperature
range.
The fan can be mounted in any direction. Install DKEX/KTEX in the correct air direction (arrow on housing). The fan must
be installed so that service and maintenance can be performed easily and safely. Make sure the fan is firmly fixed and
securely anchored. DKEX/KTEX must be installed so that vibrations can not be transmitted to the duct system or building
structure.
Disturbing air noise can be avoided by installing silencers (accessory).
Duct installations must be carried out so that ingress protection class IP 20 (mesh width less than 12mm) is fulfilled on
the inlet and outlet side. Parts that assure the IP classification must be correctly designed with regard to strength and
material.
Rust particles must not be present in the air stream.
Components that are installed before or after the fan or that are in the direct air stream may not have unprotected alu-
minium or steel surfaces. A surface protection that at least fulfills the crosscut test parameter of 2 / DIN EN ISO 2409 is
necessary to prevent an aluminothermic reaction.
Mains circuit breaker must precede the fans. Electrical connection carried out according to wiring diagram, chapter 4.3.
Wiring diagram must be available in the workplace. All fans for 3-phase (Δ/Y) are supplied from factory wired for 400V
3-phase (Y). If electrical connections are made inside explosive environment then the used components must be in-
tended for the relevant Ex environment. When the free end of the permanently connected cable terminates in hazard-
ous area, it shall be protected by type of protection listed in clause 1 of EN 60079-0:2012. The mains supply for
explosion proof fans must be fixed. Supplied with extended connection cable.
If there is a risk of lightning strikes the installation must be protected with suitable lightning protection.
The connection cable on KTEX is secured with cable ties in order to guide the cable correctly in relation to the hinge on
the hatch. Attachment must be carried out so that the cable can still be extended after fixing without the cable insula-
tion being damaged.
141815 | A002

Installation | 9
5.1 Installation example
Fig. 1 DKEX
Fig. 2 KTEX
Installation examples (figure 1 , figure 2) only function as a guideline for installation where dimensioning of suspension
devices must be carried out by the installer and adapted to the prevailing conditions. Fans (3) can be installed using
brackets or suspended mountings (4). If any form of suspension device or bracket is installed on the fans the distance
to moving parts must not be less than 25 mm. Screw or rivet joints must be adapted for the purpose and cleaning of
the fan must be carried out after completed installation. The dashed areas (5) are suitable for installation of ducts and
any suspension devices. Ducts (1) should be connected to fans using collars (2).
141815 | A002

10 | Checklist
6 Checklist
Always read the safety instructions prior to commissioning. Before starting for the first time, ensure that:
• The ambient temperature, humidity, dirt in the environment and the air’s corrosive properties have been taken into
consideration.
• The impeller do not hit parts of the fan housing (min. 3 mm).
• Installation and electrical wiring are carried out in a professional manner
• Safety equipment is installed
• Any installation debris and foreign objects are removed from the impeller and air intake area.
Warning
Loose objects inside the casing may be flung out!
• Protective conductor and external earth conductor are connected.
• Cable glands are sealed
• PTC resistors and monitoring units are professionally connected and fully functional.
• Connection data corresponds with the data on the rating plate: Max. voltage +6%, -10%, according to IEC 38. Rated
current/power must not be exceeded at rated voltage.
• Static back pressure may not be lower than the minimum table 1.
• The voltage of controllable fans is permitted to vary between 15 % and 100 % of nominal voltage with a transform-
er and between 25 % and 100 % with a thyristor.
• Speed control using a frequency converter is not allowed.
• Motor protection functions.
7 Commissioning
Commissioning may only take place if all safety instructions and controls according the checklist is performed without
comment. When putting into operations check that:
• No moving parts is touching the housing (min. 3 mm).
• The impeller direction of rotation is correct (direction arrow on casing).
• The fan runs smoothly without abnormal noise and that the operation is without vibrations. (Strong vibrations due to
imbalance, e.g. caused by transport damage or improper handling can lead to damage, check for imbalance as
necessary.)
• All electrical conducting components are grounding through contact washers.
• The fan is not controlled by extensive on and off regulation.
• The fan are intended for continuous operation S1. The control must not allow any extreme switching modes!
• A-weighted sound pressure levels above 70 dB(A) can occur, see the product catalogue, www.systemair.com.
Note:
If the fan is stationary for longer than a week in a damp environment it must be in operation for at least 2
hours every week to remove any condensation in the motor.
141815 | A002

Maintenance |11
8 Maintenance
Caution
Always read the safety information before maintenance or service.
Repair or replacement of components is not permitted on DKEX/KTEX. For other questions about the fan, contact techni-
cal support. Cleaning interval should be in proportion to how fast the impeller becomes dirty. Disassembly of the impel-
ler is not allowed.
Motors are completely or partly covered by antistatic painting or coating, which is able to derivate electric charges. A
repaint may lead to dangerous static charges and is therefore not allowed
Check that:
• The installation is accessible for cleaning and inspection work.
• No Ex atmosphere is present before switching of the fan.
• That the fan is not energized and the current circuit is interrupted and secured against restart.
• The impeller has stopped before any maintenance/cleaning begins.
• Applicable health and safety regulations are followed (EN50 110, IEC 364).
Danger
Cleaning with fluids when the fan is connected to voltage can cause an electric shock – danger to life!
• Under no circumstances may a high pressure cleaner or water jet be used.
• No aggressive solvents may be used as cleaning agents
• The cleaning should be carried out in the air flow and in the in and outlet area.
• Loose screws must be attached
• If the motor protection has tripped, check that the fan is not blocked. Contact the manufacturer if the fan does not
start after you have checked and reset motor protection.
• After cleaning the fan must run for 30 min. at 80–100 % of it’s rated voltage to fully dry out. This allows that any
water that has entered to evaporate.
After maintenance or servicing, check that:
• There is no abnormal noise and that the operation is without vibrations.
• The impeller balance weights have not been moved and that the impeller blades have not been bent.
141815 | A002

12 | Other
9 Other
The fan should be inspected and cleaned when necessary but at least once a year so that imbalance and excessive
wear on the bearings is avoided. At any sign of wear or latest after 40,000 h, a bearing exchange is required, contact
technical support. A filter before the fan inlet can extend the fan cleaning interval. At other damages (eg, cable and ca-
ble glands), please contact technical support.
If the screws need to be changed then the strength class of new screws must be at least 8.8 and with suitable screw
locking. Required tightening torques M6=9,5 Nm, M8=23 Nm and M10=46 Nm.
Should fans be on stock or put into operation after a long period, or if they have been exposed to condensation during
an extended period, the motor winding insulation resistance must be measured before the fan is put into operation. If
the values are equal to/less than 1.5 Mohm, the motor winding must be dried. Contact technical support for
instructions.
The fan mainly consist of recycled materials that can be recycled again when the service life of the product has ended.
Check and follow the relevant legislation for recycling.
Fig. 3 Name plate
AId. nr. of Notified Body
BThe Epsilon-X mark indicates that the equipment comes under ATEX
CEquipment group II is intended for use in areas with explosive gas, except mining gas
DCategory 2, zone 1, G = potentially explosive gas mixture can be occasionally expected to during normal
operation.
EExplosion-protected material
FType of protection e = increased protection against sparks
GApparatus group IIB (also applies to IIA)+H2also applies to hydrogen
IEPL Equipment Protection Level
HTemperature class T3, max. surface temperature for fan casing and motor is 200 °C, can be used for gas
mixtures with ignition temperature exceeding 200 °C
JCertificate Number
141815 | A002

Other | 13
9.1 Name plates DKEX
141815 | A002

14 | Other
9.2 Name plates KTEX
141815 | A002

141815 | A002

Explosion proof fans · Operation and Maintenance Instructions · 141815 · en_GB · 29-11-2017 · A002
Systemair Sverige AB
Industrivägen 3
SE-739 30 Skinnskatteberg, Sweden
Phone [phone]
Fax [phone]
www.systemair.com