IMO(CE) DKEX KTEX

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/m
3
.
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 | A005