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Venture Industries Sp. z o.o.
Mokra 27 Street
05-092 Łomianki-Kiełpin
Poland
OPERATION AND MONTAGE MANUAL
No RFEC/U/2017- 2 (EN)
tel. (0-22) 7519550; 7512031, fax (0-22) 7512259; 7511202, e-mail: [email protected]
4.2 Guidelines for regulation
The fan has built-in speed regulator of EC type motor (see connection diagram - appendix C) allowing regulating speed in following methods:
1)
maximal speed operation
2)
rotor speed proportional to input signal on the input, set by potentiometer 0-10 kΩ and internal source of 10V DC signal.
3)
rotor speed proportional to input signal on the input, set by external source of analogue signal 0-10 V DC or signal 1-10 kHz PWM.
The fan start is done over 0,8 V (8% PWM) - below this value the fan stops. For models with DIGITAL INPUT it is also needed
connection signal from DC OUT output to this input to enable operating (start permission).
For start and stop of the fan it is recommended to use input signals (DIGITAL INPUT or INPUT 0-10V). Control by cutting-off
the power supply e.g. by contactor, is not recommended and in wrong conditions (responsive on/off) could lead to the fan
damage.
Built-in controller change the fan speed proportional to the level of input analogue signal.
The minimal speed is set by 1 V / 10% PWM signal and maximal speed by 10 V / 100% PWM signal.
Never overload fan voltage outputs, the standard limit of load current on signal output is 2,5 mA. Limit values for no standard signal outputs
are shown on connection diagrams.
• The parameters of the device (ambient and operation temperature, flow rate min and max etc.) refer to the rated speed. Too slow rotation
speed can lead to the deterioration of motor cooling and cause to overheating / damage.
5. MAINTENANCE, REVIEW
During maintenance and review follow the guidelines contained in 1 chapter of this instruction and maintenance guidelines.
5.1 maintenance guidelines
Fan must be subject of regular review and maintenance (point 5.2). The set between routine checks and maintenance should be determined
by user, based on the observation of unit and specific conditions and actions. If irregularities are found, the device must be taken out of
service and repaired.
To clean fan use slightly damp delicate material. It is prohibited to use detergents, liquids under pressure and tools that may scratch the unit
surface. After fan cleaning (after end of maintenance) turn on the fan for 30 minutes (with full speed).
In case of long fan downtimes it should be run at least once per month for 2 hours (with full speed).
Prevent the accumulation of dust/dirt on and inside the fan. Dirt accumulated on: grids – may reduce the fan parameters; impeller – may
lose it balance; housing and motor – can reduce the cooling; hot surfaces – in extreme situations may ignite. If the device is secured by filter -
filter should by regularly inspected and replaced if it pollution is too high. The dirt accumulated on the filter reduces the fan parameters.
Ensure that there are no foreign bodies near and inside the fan, the impeller is not blocked, the unit is clean, dry and secured after
maintenance and review.
Fan motor is equipped with bearing with life expectancy 40 000 hours (ambient temperature 40˚C). Bearings do not need refill lubricate.
5.2 Unit maintenance and review
During review and before first use of the unit or after long time period of storage attention to the following should be paid:
accumulation of the dirt on the unit and filter (if used), state of grid / covers,
is the device stable, not damaged, the structure is complete, moving elements can move freely,
if there are any foreign bodies or loose elements inside the fan,
if there is loose bearing and rotating the shaft cause in its heavy/noisy work,
are connecting elements tightened, is fan surface without corrosion, are electrical wires not damaged,
is the safety equipment working and property set, is shock protection effective,
if there are leaks from the motor, overheating and vibrations.
During operations, especially after first start pay attention to:
correct operation,
there are no unusual noises and vibrations, leaks from the motor, overheating or vibrations,
the grids are in proper condition,
the fan current is not higher than show on nameplate. Exceed of current placed on the name plate could by a sign of unit damage.
