Envirovent SILENT Manual

SILENT
Instruction leaflet

Fig.1a
Fig.1b
1
2
3
4
5
1
2
3
4
5
6

Fig.4
Fig.3
Fig.2
LN
L
N
Ls
LN
L
N
Ls

L
N
Fig.7
Fig.6
Fig.5
LNLs
LNLs
T (min) T (min)
A
5
20
30
L
N
SILENT T SILENT IT
SILENT PIR

Fig.10
Fig.9
Fig.8
T(
min)
HR (%)
L
N
LNLs
L
N
LNLs

Fig.11
L
N
L N Ls
SILENT 100
SILENT 125 & 150

SILENT Axial Extractor Fans
The SILENT extractor fan ranges are manufactured to the high standards of production
and quality 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 individually
tested at the end of the manufacturing process.
On receipt of the product we recommend that you to check the following:
1- That it is the correct size.
2- That it is the correct model.
3- That the details on the rating label are those you require: voltage, frequency...
Installation
The installation must be carried out in accordance with the electrical standards in force
in your country.
This fan is IP45 rated and it is suitable for application in zones 1 and 2 with RCD
protection.
IMPORTANT: Before installing and wiring the unit, ensure that the main supply
is disconnected.
Fig. 1 / 1b:
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 ceiling mounting and can either discharge directly to
the outside or via an individual ducting system (see Fig. 2).
The unit should be mounted on the wall or ceiling using the 4 rawl plugs and screws
provided.
Make a hole in the wall or ceiling of diameter:
SILENT-100: 105 mm
SILENT-125: 125 mm
SILENT-150: 160 mm
If the unit is to be installed with individual ducting, use a standard duct of diameter:
SILENT-100: 100 mm
SILENT-125: 125 mm
SILENT-150: 150 or 160 mm
Ensure that there are no obstructions to the airflow and that the impeller turns freely.
Fix the extractor 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
shutter opens freely and has not being 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 protection grille (1).

Electrical connection
The SILENT is an extractor designed for a single phase supply, with voltage and
frequency as indicated on the rating plate of the unit. The units are manufactured with
double electrical insulation (Class II) and therefore they do not need an earth
connection.
The electrical installation must include a double pole switch with a contact clearance of
at least 3 mm.
The electrical cable must enter the SILENT through the cable entry (4).
The SILENT must be connected to the electrical supply in accordance with local wiring
regulations.
Once the cable has been introduced proceed using the electrical wiring diagram
applicable to the selected model.
SILENT S
For these models use the following diagrams:
Fig.3: Switching the extractor through the light switch.
Fig.4: To switch the fan through an independent switch.
SILENT T
This model is provided with an adjustable 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 potentiometer 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-100 IT (this version is only available as SILENT-100)
This model is provided with an adjustable 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).
ATTENTION: The product also includes an over-run timer facility that
starts the fan after the first 50 seconds of non-operation. After these first 50
seconds the fan operates automatically.
SILENT HT
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 humidity) and with a timer, adjustable between 2 and 20 minutes.
Operation
Case 1: Automatic operation (fig.9)
In automatic operation, 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 and after the selected
period set on the timer.
Case 2: Automatic operation as in case 1 with the facility to override the humidistat by
means of the light switch (fig.8), when the humidity level in the room is lower than the

selected level. In this case, the extractor continues to operate for the selected period
set on the timer after the switch light has been switched off.
ATTENTION: When the humidity rate is above the selected value, the
automatic option takes precedence over the manual and the unit cannot then
be switched off using a switch.
The desired humidity level is selected by means of a potentiometer “% Hr”positioned on
the printed circuit board (fig.10) and accessible once the grille (1) has been removed.
- To increase the humidity setting turn anticlockwise (min.60 %)
- To reduce the humidity setting turn clockwise (max. 90 %)
To set the timer, turn the potentiometer “t min.”on the printed circuit board (fig.10):
- To reduce the "run on" time, turn anticlockwise (min. 2 minutes)
- To increase the "run on" time, turn clockwise (max: 20 minutes).
SILENT-100 PIR (this version is only available as SILENT-100)
Models provided with a PIR (passive infra-red) detector. The unit starts automatically
when a movement is detected with a maximum distance of 4 metres (fig.9).
They are also fitted with an adjustable "run on" timer (1 to 30 minutes), and the unit will
continue to operate for the set period after initiation by the movement detector.
To set the temporisation, turn the potentiometer on the printed board (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-150 P and HTP (these versions are only available as
SILENT-150)
Models provided with on/off pullcord switch use the following wiring diagram:
Fig.11 –SILENT operated only with the pullcord
Maintenance
The extractor fan only requires periodical cleaning using a cloth lightly impregnated with
a soft detergent.
After Sales Service
We recommend you do not dismantle or remove any other parts than those mentioned,
as any tampering would automatically cancel the guarantee. If you detect any fault,
contact your EnviroVent on 01423 810810.
EnviroVent reserves the right to alter specifications without notice.
All EnviroVent products are designed to be recycled when they reach the end of their
working life. To save the environment and to reduce landfill, please call EnviroVent on
01423 810810 to arrange for the fan to be returned to the factory.
EnviroVent Ltd
Envirovent House
Hornbeam Business Park
Harrogate
HG2 8PA

GUARANTEE
The SILENT-100 range products are covered by a five year
guarantee, subject to the specified maintenance stated within
this booklet. In the event of any failure of the fan within five
years of supply- excluding only wilful or careless damage –we
will exchange the fan free of charge.
EnviroVent Ltd
EnviroVent House
Hornbeam Business Park
Harrogate
HG2 8PA
Name and address of purchaser ………………………………………
Model ..................................................................................................
Date of purchase …………………………………………………………
Dealer stamp

EnviroVent Ltd
EnviroVent House
Hornbeam Business Park
Harrogate
Hg2 8PA
01423 810 810
www.envirovent.com
[email protected]
Ref. 9023003902