Envirovent Silent-100 Design Manual

SILENT DESIGN
Instruction leaflet

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8
SILENT DESIGN axial extractor fans
Please read this instruction booklet
carefully before installing or starting
up the product. It contains important
information on personal and user
safety measures to be followed whi-
lst installing, using and carrying out
maintenance work on the equipment.
The SILENT DESIGN extractor fans
have been manufactured following
current technical safety regulations,
production and quality standards as
laid down by the international Quality
Standard ISO 9001. All components
have been checked and every one of
the final products will have been in-
dividually tested at the end of the ma-
nufacturing process.
Check that the product is in perfect
condition while unpacking. Make sure
that the product corresponds to the
one you have ordered and that the de-
tails on the instruction plate fulfil your
requirements.
The installation and the disconnection
device of the fixed installation used
must be in accordance with the ins-
tallation regulations in force in each
country. Once the product has been
installed, pass this booklet to the end
user.
RECOMMENDATIONS
IMPORTANT: Before
installing and wiring
the unit, ensure that
the mains supply is
disconnected.
Working ambient tem-
perature for fan equi-
pment should not be
exceeded. Typically,
this falls within -5°C
to +40°C, unless sta-
ted otherwise.
The spigot cannot be
connected to a duct
which is used to ex-
tract smoke from
gas or any other fuel
appliance.
The extractor must
not be used in explosi-
ve or corrosive atmos-
pheres.
If the SILENT DESIGN
fan is operating in a
room where there is a
boiler or any other kind
of combustion device
that requires airflow
to work, check that the

9
air inlets to the room
are sufficient. This
appliance can be used
by children aged from
8 years and above and
persons with reduced
physical, sensory or
mental capabilities
or lack of experience
and knowledge if they
have been given su-
pervision or instruc-
tion concerning use of
the appliance in a safe
way and understand
the hazards involved.
Children shall not
play with the applian-
ce. Cleaning and user
maintenance shall not
be made by children
without supervision.
INSTALLATION (fig.1)
This fan is IP45 rated and it is suita-
ble for application in zones 1 and 2
with RCD protection.
1- Protection grille
2- Connection terminals
3- Outlet with backdraught shutter
4- Cable entry
5- Screwdriver to adjust Timer and
Hygrostat (not supply with S and P
models)
6- Pullcord (P models)
The SILENT is suitable for wall or cei-
ling mounting and can either extract
directly to atmosphere or via a ducted
system (fig.2).
The unit can be mounted on the wall
or ceiling using the 4 raw plugs and
the screws provided. Make a hole in
the wall or ceiling of diameter:
• SILENT-100 DESIGN: 105 to 107 mm.
• SILENT-125 DESIGN: 125 to 132 mm.
• SILENT-150 DESIGN: 160 to 158 mm.
If using the EnviroVent high rise wall
kit, please refer to kit for core drill
size
If the unit is to be installed in a duct-
ed system, use the following standard
diameter of duct:
• SILENT-100 DESIGN: 100 mm.
• SILENT-125 DESIGN: 125 mm.
• SILENT-150 DESIGN: 150 or 160 mm.
Ensure that there are no obstructions
to the airflow and that the impeller
turns freely.
Fix the extractor fan to the wall in such
a way that it is not distorted in order
to avoid noise generation or problems
with the rotation of the impeller.
Make sure that the backdraught shut-
ter opens freely and has not being

10
damaged in transit. Introduce the
mains cable through the cable entry
(4) and fix it to the wall.
Connect the electrical wiring as set
out below and then mount the protec-
tion grille (1).
ELECTRICAL CONNECTION
The SILENT DESIGN is an extractor
fan designed for a single-phase su-
pply, with voltage and frequency as in-
dicated on the rating plate of the unit.
The units are manufactured with dou-
ble electrical insulation (Class II) and
therefore they do not need an earth
connection.
The electrical cable must enter the SI-
LENT DESIGN through the cable entry
(4). The SILENT DESIGN must be con-
nected to the electrical supply in ac-
cordance with local wiring regulations.
Once the cable has been introduced
proceed using the electrical wiring dia-
gram applicable to the selected model.
SILENT S DESIGN
For these models, use the following
diagrams:
Fig.3: Switching the extractor through
the light switch.
Fig.4: To switch the fan through an in-
dependent switch.
SILENT T DESIGN
This model is provided with an adjus-
table over-run timer. The timer allows
the fan to continue to operate for the
selected period after the switch has
been turned off (fig. 6).
Fig.5 shows how to connect the fan
with timer utilising the same switch
as for the lighting circuit.
To set the timer, turn the potentio-
meter on the printed circuit board as
(fig. 7).
• To reduce the “run on” time, turn
anticlockwise (min. 1 minute).
• To increase the “run on” time, turn
clockwise (max: 30 minutes).
SILENT HT DESIGN
IMPORTANT: Do not remove the tape
covering the humidity sensor located
on the reserve of the grille.
Models provided with an electronic
humidistat which can be adjusted
from 60% to 90 % RH (Relative Hu-
midity) and with a timer, adjustable
between 1 and 30 minutes.
The desired humidity level and run
on time are selected by means of 8
dip-switches placed on the printed
circuit board, and easily accessible.
Each dip-switch has two positions
[ON (1) and OFF (0)] which are selec-
ted with the small plastic screwdriver
supplied with the fan (fig.10):
The functions of these dip-switches
are:
• Switch 1: “Interval” function selec-
tion (yes or no)
• Switches 2 and 3: Interval time set-
tings between 4, 8, 12 and 24 hours

11
• Switches 4 and 5: Humidistat se-
ttings between 60, 70, 80 and 90%
• Switches 6 and 7: Over-run timer
settings between 1, 5, 15 and 30
minutes
• Switch 8: Start-up timer function
(yes or no)
Automatic operation:
The extractor is connected to the
main supply with only two wires.
The humidistat causes the extractor
to operate automatically when the
humidity level in the room is higher
than the set level. The extractor will
stop automatically when the humidity
drops below the selected level (-5% or
+10%) and after the selected period
set on the over-run timer.
“Interval” functions:
This function is useful when the ex-
tract fan is installed in very wet (near
the sea) or the ambiance exceeds the
set level for a very long time. To pre-
vent the fan to run for hours without
stopping, the “Interval” function allows
the fan to switch off automatically one
hour after it began to run. The extrac-
tor keeps switched off during the set
time for interval function. If the humid-
ity level is still above the set level when
the time interval is over, the extract fan
switches on again and run during one
hour. To select this function put the
dip-switch 1 to position “ON”.
To adjust the set time for interval func-
tion, use the dip-switches 2 and 3.
When, on the contrary, the extract fan
never switches on because the humid-
ity level is always very low or it is im-
properly installed (above heating appli-
ance, behind a door, in an area with no
air movement) putting the 1 dip-switch
interval function to position “ON”, the
fan switches on automatically during
1 hour and then it keeps switched off
during the set time for interval func-
tion. This function causes the fan to run
whatever the humidity level.
To select this function put the dip-
switch 1 to position “ON”.
To adjust the pre-set time for interval
function, use the dip-switches 2 and 3.
Automatic operation with external
switch to override the extractor:
The extractor is connected to the
main supply with three wires.
Operation as previous “Automatic
operation”, with the facility to ove-
rride the humidistat by means of the
light switch when the humidity level

12
in the room is lower than the selec-
ted level. In this case the extractor
continues to operate for the selected
period of time (over-run timer) after
the switch light has been switched off.
ATTENTION: When the humidity rate
is above the selected value, the auto-
matic option takes precedence over
the manual and the unit cannot then
be switched off using the pullcord.
Start-up timer function:
In this operation, the “start-up timer
function” allows to delay the extractor
start-up for a period of 50 seconds.
So that, for example, the fan does not
switch on if the usage time of the ba-
throom is less than 50s.
If you exceed the 50s and the humidity
level in the room is below the selected
level, the fan switches on, and when
the light switches off, runs the time
set by the timer.
This function is selected with the dip-
switch 8.
Factory settings:
• Interval function: OFF
• Interval time: 4h
• Humidistat: 60%HR
• Timer: 1 minute
• Start-up timer function: OFF
SILENT P DESIGN
Models provided with on/off pullcord
switch use the following wiring dia-
gram:
Fig.11: Fan operating only with pull-
cord.
MAINTENANCE
Fan equipment should be electrically
isolated and locked out before any
work starts.
The extractor fan only requires perio-
dical cleaning using a cloth lightly im-
pregnated with a soft detergent.
PUTTING OUT OF SERVICE
AND RECYCLING
EEC legislation and our con-
sideration of future gener-
ations mean that we should
always recycle materials
where possible; please do not
forget to deposit all packaging in the
appropriate recycling bins. If your de-
vice is also labeled with this symbol,
please take it to the nearest Waste
Management Plant at the end of its
serviceable life.
AFTER SALES SERVICE
We recommend you not to try to dis-
mantle or remove any other parts
than those mentioned as any tamper-
ing would automatically cancel the
EnviroVent guarantee.
If you detect any fault, contact our
dedicated Technical team on 01423
810810.

13
WARRANTY
The SILENT DESIGN range products are covered by a five year warran-
ty, subject to the specified maintenance stated within this booklet.
If your fan has been supplied and installed by EnviroVent it is covered
with a full parts and labour warranty. If you detect a fault, please con-
tact us on 01423 810810. You will be given guidance over the phone,
or an arrangement may be made for a member of our team to visit
(call-out charges may apply if a fault cannot be identified).
Supply Only
If your fan has been supplied by EnviroVent and installed by a third
party, it is covered by a parts only warranty. If you detect a fault and the
product has been installed in accordance to the fitting/wiring instruc-
tions, relevant guidance documents and by a competent and qualified
person (proof may be required), please return the product to the place
of purchase for a replacement.
Warranty Conditions & Exclusions
Please note that a receipt will be required as proof of purchase. Fans
bought from an unapproved source, including but not limited to auc-
tion websites, are not covered by the warranty.
• The system must be correctly installed and operated according to
the instructions contained in the user guide supplied.
• The warranty will be rendered invalid if the system has been ser-
viced, maintained, repaired, taken apart or tampered with by any
person not authorized, which in any way contradicts the instruction
guide set out by EnviroVent.
• The warranty does not cover accidental damage, misuse or abuse.
• The warranty is in addi on to your statutory or legal rights.

EnviroVent Ltd
Harrogate West Business Park
Unit 1 Bardner Bank
Killinghall
Harrogate
HG3 2SP
01423 810 810
[e-mail]
www.envirovent.com
Ref. 9023065502-01