Sterr DFA SILENT User manual

Mixed Flow In-Line Duct Fan - Instructions
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EN
Mixed Flow In-Line Duct Fan
Instructions
DFA SILENT

Mixed Flow In-Line Duct Fan - Instructions
Copyright © - Copying and reproduction strictly prohibited without permission by STERR
STERR
26.06.2019
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EN
Impeller
External
casing
Non-return check
valve
Plastic clips
Sound proof
cotton
Mounting bracket

Mixed Flow In-Line Duct Fan - Instructions
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EN
Dismounting Diagram
Look up the fan by plastic clips
Unlock the plastic clips
Open the clips on both ends
Remove the fan body
Fix the mounting bracket with screws
Couple the ducts

Mixed Flow In-Line Duct Fan - Instructions
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TWO-SPEED WIRING INSTRUCTION
Wiring diagram
N: COMMON
LB: LOW SPEED
LA: HIGH SPEED
Wiring with REB speed control
Switch control
N: COMMON
LB: LOW SPEED
LA: HIGH SPEED
C: SWITCH
brown
black
white
brown
blue
Power
brown
black
white
brown
blue
Power
Remark: To avoid influencing the fan
service life, the optimal adjustable speed
range Is from 70% to 100%.
N: COMMON
LA: HIGH SPEED
brown
black
white
brown
blue
Power

Mixed Flow In-Line Duct Fan - Instructions
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STERR
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EN
WIRING WITH RUN ON TIMER
PLUG
A1 = LT: Switch Active Trigger
A1 = L: Constatnt Active
N: Neutral
E: Earth
brown
black
blue
Power
whithe
black
brown
MOTOR
Run on timer
Speed settings
Please turn off the power when switching speed
Run on timer Instruction
Run on timer
Speed settings
Speed Controller Instruction
Timer description
1) Run on time comes preset for 10min.
2) Can adjust delay-time between 5 min to 30 min.
3) Arrow P Point to the delay-time.
Please turn off the power
when swithinch speed

Mixed Flow In-Line Duct Fan - Instructions
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STERR
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EN
Instructions Manual
Thank you for purchasing our products. It has been manufactured
following current technical safety regulations and in compliance with EC
standard.
Please read this Instruction carefully before Installing or starting up the
product. It contains important information on personal and user safely
measures to be followed while installing, using and carrying out
maintenance work on the equipment. Once the product has been
Installed, please hand in this booklet to the end user.
Check that the apparatus is in perfect condition while unpacking. Any
fault or damage caused in origin is covered by our company guarantee.
Please make sure that the apparatus coincides with the product you
have ordered and that the details on the instructions plate fulfil your
necessities.
Transport and manipulation.
•The packaging used for this apparatus has been designed to
support normal transporting conditions. The apparatus must
always be transported in its original packaging as not doing so
could deform or damage the product.
•The product should be stored in a dry place in its original
packaging, protected from dust and dirt until it is installed in its final
location. Do not accept delivery if the apparatus is not in its original
packaging or shows clear signs or having been manipulated in any
way.
•Do not place heavyweights on the packed product and avoid
knocking or dropping it.

Mixed Flow In-Line Duct Fan - Instructions
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Important information for the Safety of installers and user.
•Installation must only be carried out by qualified persona.
•Make sure that the Installation complies with each country's currant
mechanical and electrical norms.
•Once ready to use, the apparatus must fulfil the following standard:
oLow Voltage Directive (LVD) 2014/35/EU
oElectromagnetic Compatibility (EMC) 2014/30 EU
•Ventilators, or apparatus that include them, have been designed to
move the air in the area stipulated on their characteristics plate.
•This apparatus must not be used in explosive or corrosive
atmospheres.
•If a ventilator is going to be installed to extract air from premises
where a boiler or other combustion apparatus are installed, make
sure that the building has sufficient air intakes to assure adequate
combustion. The extractor outlet must not be connected to a duct
used exhaust smoke or fumes from any appliance that uses gas or
any other type of fuel.
•This appliance is not intended for use by young children or infirm
persons unless they have been adequately supervised by a
responsible parson to ensure that they can use the appliance
safely. Young children should be supervised to ensure that they do
not play with the appliance.

Mixed Flow In-Line Duct Fan - Instructions
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Safety during Installation.
•Make sure there are no loose elements near the ventilator, as they
could run the risk or being sucked up by it. If it is going to be
Installed in a duct, check that it is clean of any element that could
be sucked up by the ventilator.
•When installing an apparatus, make sure that all the fittings are in
place and that the structure which supports it is resistant enough to
bear its weight at full functioning power.
•Before manipulating the apparatus, make sure the mains supply is
disconnected, even if the machine is switched off.
•Check that the mains supply voltage and frequency values
coincide with the stipulations on the characteristics plate.
•The electrical installation must include a double pole switch with a
contact clearance of at least 3 mm, correctly sized and in
accordance with the electrical standards of the country of
installation.
•Please follow the connections diagram for the electrical
connections.
•If an earth connection is necessary, check that it correctly
connected and that adequate thermal and overloading protection
has been connected and adjusted to the corresponding limits.
•If a ventilator is installed in a duct, the duct must be exclusively for
the ventilation system.

Mixed Flow In-Line Duct Fan - Instructions
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Starting up.
Before starting up the machine, make sure that:
•The apparatus is well secured and the electrical connections have
been carried out correctly.
•The safety devices have been adequately connected.
•No loose material or fitting remains can be sucked up by the
ventilator, if the ventilator has been mounted in a duct, make sure it
is clear of loose material.
•The earth fittings are adequately connected.
•The electrical safety devices are correctly connected, adjusted and
ready for use.
•The wire and electrical connections inputs are correctly sealed and
water-tight.
When starting up the machine, make sure that:
•The propeller turns in the correct direction.
•There are no abnormal vibrations.
•If any of the electrical safely devices blow, the apparatus must be
quickly disconnected from the mains supply. The whole installation
should be carefully checked before trying to start up the machine
again.
Maintenance.
•Before manipulating the ventilator, make sure it is disconnected
from the mains supply even if it has previously been switched off.
Prevent the possibility of anyone else connecting it while it is being
manipulated.
•The apparatus must be regularly inspected. These inspections

Mixed Flow In-Line Duct Fan - Instructions
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STERR
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EN
should be carried out bearing in mind the machine's working
conditions, in order to avoid dirt or dust accumulating on the
propeller, turbine, motor or grids. This could be dangerous and
perceptibly shorten the working life of the ventilator unit.
•While cleaning, great care should be taken not to unstable the
propeller or turbine.
•All maintenance and repair work should be carried out in strict
compliance with each country's current safety regulations.
INDICATION: THE PRODUCER RESERVES THE RIGHT TO
CHANGE THE SPECIFICATIONS WITHOUT NOTICE.
Pursuant to European Directive 2002/96/EC and the Act
on waste electrical and electronic equipment, this
device upon its decommissioning should not be
disposed of together with other household waste. The
user is required to deliver the device to the electrical
and electronic equipment recycling collection centre.