Vent-Axia 496575 Assembly instructions

100mm 125mm & 150mm
Intermittent Axial fan range.
Installation and Wiring Instructions
NBR High Pressure
Axial Fan Range
Stock
Ref. N° NBR Model
496575 100mm Basic
496576 100mm Timer
496577 100mm Humidity/Timer
496578 100mm PIR
496579 125mm Basic
496580 125mm Timer
496581 125mm Humidity/Timer
496582 150mm Basic
496583 150mm Timer
496584 150mm Humidity/Timer
220-240V~50Hz
PLEASE READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS.
PLEASE SAVE THESE INSTRUCTIONS.
IP45

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Installation and Wiring Instructions
for the NBR High Pressure Axial Range of Extractor Fans.
IMPORTANT: READ THESE INSTRUCTIONS BEFORE
COMMENCING THE INSTALLATION
DO NOT install this product in areas where the following may be present or occur:
•Excessive oil or a grease laden atmosphere.
•Corrosive or flammable gases, liquids or vapours.
• Ambient temperatures higher than 40°C or less than –5°C.
• Possible obstructions which would hinder the access or removal of the Fan.
SAFETY AND GUIDANCE NOTES
A. All wiring to be in accordance with the current I.E.E.
Regulations, or the appropriate standards of your country
and MUST be installed by a suitably qualified person.
B. The Fan should be provided with a local isolator switch
capable of disconnecting all poles, having a contact
separation of at least 3mm.
C. Ensure that the mains supply (Voltage, Frequency, and
Phase) complies with the rating label.
D. The Fan should only be used in conjunction with the
appropriate Vent-Axia products.
E. The Fan should only be used in conjunction with fixed
wiring.
F. When the Fan is used to remove air from a room containing
a fuel-burning appliance, ensure that the air replacement is
adequate for both the fan and the fuel-burning appliance.
G. The Fan should not be used where it is liable to be subject
to direct water spray for prolonged periods of time.
H. Where ducted Fans are used to handle moisture-laden air, a
condensation trap should be fitted. Horizontal ducts should
be arranged to slope slightly downwards away from the Fan.
I. This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.

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Open up the internal cover to access
the spirit level bubble and terminals
J. Children should be supervised to ensure that they do not
play with the appliance.
K. Stationary appliances not fitted with means for
disconnection from the supply mains having a contact
separation in all poles that provide full disconnection under
over voltage category III, the instructions state that means
for disconnection must be incorporated in the fixed wiring in
accordance with the wiring rules.
L. Ensure the grille is fully engaged onto the fan chassis using
all clips.
DESCRIPTION
NBR High Pressure 100 axial extract fans are suitable for domestic bathrooms and W.C’s.
The NBR High Pressure 125 and 150 axial extract fans are suitable for domestic kitchens and utility
rooms. They are available as wall or panel/ceiling mounted models with shutter, timer, humidity and
PIR combinations.
INSTALLATION
IMPORTANT: The fan should only be used in
conjunction with fixed wiring.
PANEL/CEILING MOUNTING
1. For panel/ceiling mounting the fan should be
installed into a duct protected by an exterior air
grille that must comply with the standard
requirements of your country to prevent
access to the fan’s impeller.
2. Cut a 107mm diameter hole for 100mm fans, a
130mm hole for 125mm fans or a 155mm
diameter hole for 150mm fans.
3. Push the two clips on each side of the fan and
pull the grille away from the chassis.
4. Using the built in spirit level bubble as an aid,
mark the screw centres through the holes in
the fan back plate. Drill, plug and screw into
position.
5. After installation, ensure impeller rotates freely and
the shutters can open.
6. Replace the grille and ensure the clips engaged.
WALL MOUNTING
1. For wall mounting either cut a 115mm diameter hole for 100mm fans, a 140mm hole for 125mm
fans or a 170mm diameter hole for 150mm fans, through the wall and insert the wall sleeve.
Slope the sleeve slightly downwards away from the fan. Cut to length and cement both ends
into position flush with the wall faces.
2. Push the two clips on each side of the fan and pull the grille away from the chassis.
3. Using the built in spirit level bubble as an aid, mark the screw centres through the holes in the
fan back plate. Drill, plug and screw into position. Fix exterior grille into position with the louvres
positioned downwards. (Note:- The grille must comply with the standard requirements of your

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country to prevent access to the fan’s impeller. The wall kit used in this installation should
provide a minimum ducting length of 100mm from the fans back plate to the inside of the
external grille).
4. After installation, ensure impeller rotates freely and the shutters can open.
5. Replace the grille and ensure the clips engaged.
WIRING
WARNING: THE FAN AND ANCILLARY CONTROL
EQUIPMENT MUST BE ISOLATED FROM THE
POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE.
IMPORTANT
The fan should only be used in conjunction with fixed wiring.
The cross - sectional area of supply cord used should be ranged from 1 -1.5mm2.
Cable entry can be made from the rear or side of the fan using the grommet provided.
The extraction fan is suitable for connection to 220-240V 50Hz supply.
The fan is a class ll double insulated product and MUST NOT be earthed.
1. Select and follow the appropriate wiring diagram. (Fig. 1,2 or 3)
2. Check all connections have been made correctly and securely fastened.
3. Ensure the impeller rotates and is free from obstructions.
SETUP
WARNING: THE FAN AND ANCILLARY CONTROL
EQUIPMENT MUST BE ISOLATED FROM THE
POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE.
NBR High Pressure Axial 100,125 & 150 Basic
Single speed fan. Controlled by remote switch (e.g. light switch or auto sensor) Fig.1.
NBR High Pressure Axial 100,125 & 150 Timer
Single speed with overrun timer. The fan can be wired to a lighting circuit switch. Fig.3. or wired for a
basic on/off operation wire as Fig 2.
When switched ‘ON’, the fan will operate at full speed and will continue to run for a pre-set time after
the switch is turned ‘OFF’.
TIMER ADJUSTMENT
BEFORE ADJUSTING THE TIMER, SWITCH OFF THE MAINS SUPPLY. TIMER SHOULD
ONLY BE ADJUSTED BEFORE OR DURING INSTALLATION.
1. Remove the fan grille. The controller is factory set at 15 minutes approx. The overrun
time period can be adjusted from 5-30 minutes by altering the adjuster on the control
PCB. Note the exact min/max time may vary between products.
2. To REDUCE the operating time, use a small screwdriver to turn the adjuster Fig.4.
ANTI-CLOCKWISE.
3. To INCREASE the operating time, use a small screwdriver to turn the adjuster Fig.4.
CLOCKWISE.
4. Replace the fan grille.

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NBR High Pressure Axial 100mm PIR
Single speed with PIR (passive infra-red) detector and overrun timer. The fan starts automatically when
a movement is detected and will continue to operate for the set overrun time period. Fig. 1.
The fan can also be wired to a lighting circuit switch. Fig.3. so it can be started by the light switch or the
PIR detector.
TIMER ADJUSTMENT
BEFORE ADJUSTING THE TIMER, SWITCH OFF THE MAINS SUPPLY. TIMER SHOULD
ONLY BE ADJUSTED BEFORE OR DURING INSTALLATION.
1. Remove the fan grille. The controller is factory set at 15 minutes approx. The overrun
time period can be adjusted from 5-30 minutes by altering the adjuster on the control
PCB.
2. To REDUCE the operating time, use a small screwdriver to turn the adjuster Fig.5.
ANTI-CLOCKWISE.
3. To INCREASE the operating time, use a small screwdriver to turn the adjuster Fig.5.
CLOCKWISE.
4. Replace the fan grille.
NBR High Pressure Axial 100,125 & 150 Humidity Timer
The fan contains an integral humidity controller. In automatic mode the controller switches the fan on at
full speed when the room Relative Humidity (RH) increases. The fan will continue to run until the room
RH falls.
These fans also include a built in timer function. This gives the fan a fixed over run time of approx. 15
mins. The timer can be deactivated by removing the Jumper JP1, (Fig. 6)
HUMIDITY SET-POINT ADJUSTMENT
BEFORE ADJUSTING THE CONTROLLER, SWITCH OFF THE MAINS SUPPLY.
HUMIDISTAT SHOULD ONLY BE ADJUSTED BEFORE OR DURING INSTALLATION.
1. Remove the fan grille.
2. To INCREASE SET POINT, turn the adjuster clockwise. This will reduce the internal
Relative Humidity set point at which the fan switches on. (Fig. 6)
3. To REDUCE SET POINT, turn the adjuster anti-clockwise. This will increase the
internal Relative Humidity set point at which the fan switches on. (Fig. 6)
The integral pullcord activates the internal 15 minute timer. The timer can be cancelled by pulling the
pullcord again. The pullcord can be removed by cutting the cord.
COMFORT MODE (Humidity Timer models only)
The Humidity Timer models include Comfort Mode that can be activated via holding the pullcord for 5
seconds.
This feature delays the LS input boost operation for a maximum of 20 minutes to reduce noise and cold
drafts while bathing. After the LS is disconnected, the fan will switch on for the same period the LS had
been active (up to 20 minutes), plus the overrun time period if selected (0 or 15 minutes).
The LED will slowly blink repetitively (every 4 seconds) during comfort mode lead-in time period. The
LED transitions from blinking to solid LED on when LS boost is activated.
The fans internal Relative Humidity sensor is disabled during Comfort Mode.
This feature resets if there is a power cut.
SPEED SELECTION (Humidity Timer models only)
The fan can be set to run on high or low speed depending on the installation requirements.
The fan is factory set to low speed with jumper JP2 fitted. To activate the high speed setting remove
jumper JP2. (Fig. 6)

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SERVICING AND MAINTENANCE
WARNING: THE FAN AND ANCILLARY CONTROL
EQUIPMENT MUST BE ISOLATED FROM THE
POWER SUPPLY DURING MAINTENANCE.
1. At intervals appropriate to the installation, the fan should be inspected and cleaned to ensure there
is no build up of dirt or other deposits.
2. Wipe the inlets and front face with a damp cloth until clean.
The fan has sealed for life bearings, which do not require lubrication.
Fig.1: NBR High Pressure Axial 100,125,150 Basic and 100 PIR
Fig.2: NBR High Pressure Axial 100,125,150 Timer models
100,125,150 Humidity Timer models (Timer /Humidistat disabled)
220-240V
~ 50Hz
220-240V
~ 50Hz
3 AMP
MAX
3 AMP
MAX

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FIG. 5: PIR TIMER
Timer Adjustment
Fig.3: NBR High Pressure Axial 100,125,150 Timer, 100 PIR and
100,125,150 Humidity Timer Models
Disposal
This product should not be disposed of with household waste. Please recycle where facilities exist.
Check with your local authority for recycling advice
Timer
Adjustment
Timer Adjustment
To REDUCE the operating time, use a small
screwdriver to turn the adjuster ANTI-CLOCKWISE.
To INCREASE the operating time, use a small
screwdriver to turn the adjuster CLOCKWISE.
FIG. 4: TIMER
220-240V ~ 50Hz
N
L
LS
3 AMP
MAX
Timer Adjustment
To REDUCE the operating time, use a small
screwdriver to turn the adjuster ANTI-
CLOCKWISE.
To INCREASE the operating time, use a small
screwdriver to turn the adjuster CLOCKWISE.

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FIG. 6: HUMIDISTAT-TIMER
LED will flash
when Comfort
Mode is active
Humidity Adjustment
To INCREASE SET POINT, turn the adjuster clockwise.
This makes the controller LESS sensitive.
To REDUCE SET POINT, turn the adjuster anti-
clockwise. This makes the controller MORE sensitive.
Speed selection (JP2).
The fan is factory set to low speed with jumper JP2 fitted.
To activate the high speed setting remove jumper JP2.
Timer Function (JP1)
JP1 to deactivate the timer, remove the jumper.
15min. timer = jumper in.
No timer = jumper out.
Humidity
Adjustment
JP1
JP2
The Guarantee
Applicable only to products installed and used in the United Kingdom. For details of guarantee outside the United Kingdom
contact your local supplier.
Vent-Axia guarantees this product for 5 years from date of purchase against faulty material or workmanship. In the event of any
part being found to be defective, the product will be repaired, or at the Company’s option replaced, without charge, provided that
the product:-
Has been installed and used in accordance with the instructions given with each unit.
Has not been connected to an unsuitable electricity supply. (The correct electricity supply voltage is shown on the
product rating label attached to the unit).
Has not been subjected to misuse, neglect or damage.
Has not been modified or repaired by any person not authorised by the company.
IF CLAIMING UNDER TERMS OF GUARANTEE
Please return the complete product, carriage paid to your original supplier or nearest Vent-Axia Centre, by post or personal visit.
Please ensure that it is adequately packed and accompanied by a letter clearly marked “Guarantee Claim” stating the nature of
the fault and providing evidence of date and source of purchase.
The guarantee is offered to you as an extra benefit, and does not affect your legal rights
Head Office: Fleming Way, Crawley, West Sussex, RH10 9YX.
UK NATIONAL CALL CENTRE, Newton Road, Crawley, West Sussex, RH10 9JA
SALES ENQUIRIES: Tel: [phone] Fax: [phone]
TECHNICAL SUPPORT: Tel: [phone] Fax: [phone]
For details of the warranty and returns procedure please refer to www.vent-axia.com or write to Vent-Axia, Fleming Way, Crawley, RH10 9YX
496678B 1120
Pull and hold
For 5 Seconds
Comfort mode (On Pullcord)
To activate the comfort mode pull and hold the
pullcord for 5 Seconds. The LED will flash to
indicate that comfort mode has been set.