Vent-Axia Centra Series Assembly instructions

CONTINUOUS EXTRACT FAN
Installation and Wiring Instructions
Stock Ref. N°
44 17 82 B
PLEASE READ INSTRUCTIONS IN CONJUNCTION WITH ILLUSTRATIONS.
PLEASE SAVE THESE INSTRUCTIONS.
Centra
IPX4
220-240V~50Hz

2
Installation and Wiring Instructions for the Centra 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.
J. Young children should be supervised to ensure that they do not play with the appliance.
DESCRIPTION
The Centra 100mm fan is a continuously running extract fan for kitchens, utility rooms,
bathrooms and toilets.
The product incorporates an airflow detection system that detects the installation duct
resistance and maintains the correct fan speed to achieve the preset extract flow rate of
either 6l/s, 9l/s or 15l/s, minimising energy use and noise (see Section C-Setup for more
information).
Long life ball bearing DC motor with anti-vibration mounts provides virtually zero noise
transmission into plasterboard/panels for silent operation.
The fan can be wall or panel/ceiling mounted.
ACCESSORIES (not supplied)
WALL FITTING KIT
A range of white (stock ref. 254102) or brown (stock ref. 254100) 100mm wall kits are
available for installing into most walls using telescopic liners supplied.

3
A. 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 closed duct system of
at least 1.2m long or protected by an exterior air grille that must comply with the
standard requirements of your country to prevent access to the fans impeller.
2. Cut a 105mm diameter hole.
3. Loosen the screw at the bottom of the grille and remove the front grille. Mark the
screw centres through the holes in the fan back plate. Drill, plug and screw into
position.
4. Attach ducting as required for the installation.
5. Wire the fan as described in Section B-Wiring. Adjust any settings as required
(see Section C-Setup).
6. Replace the grille and tighten the retaining screw.
7. After installation, ensure impeller rotates freely.
WALL MOUNTING
1. For wall mounting cut a 117mm diameter hole 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. Loosen the screw in the bottom of the grille and remove the front grille. Mark the
screw centres through the holes in the fan back plate. Drill, plug and screw into
position.
3. Fix exterior grille into position with the louvres positioned downwards. (Note:- The
grille must comply with the standard requirements of your country to prevent
access to the fans impeller).
4. Wire the fan as described in Section B-Wiring. Adjust any settings as required
(see Section C-Setup).
5. Replace the grille and tighten the retaining screw.
6. After installation, ensure impeller rotates freely.
B. 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 only be made from the rear of the fan.
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 ensure all terminal
connections and cable clamps are securely fastened.
3. Ensure the impeller rotates and is free from obstructions.

4
C. SETUP
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE
ISOLATED FROM THE POWER SUPPLY DURING THE INSTALLATION /
OR MAINTENANCE.
Accessing the control settings – (Fig. 4 and 5)
1. Loosen the screw in the bottom of the grille and remove the front grille.
2. Carefully pull the inner cap from the centre of the fan away from the chassis.
3. Adjust the settings as outlined below.
Trickle speed selection (6l/s or 9l/s) – (Fig. 7)
In normal running mode the fan can extract at either 6l/s (22m3/h) or 9l/s (32m3/h) flow
rate. The fan will boost to 15l/s (54m3/h) when the LS connection is switched.
Factory set at 6l/s (22m3/h).
Remove jumper connector (JP1) if 9l/s (32m3/h) extract flow rate is
required.
Airflow detection system – enable/disable (Fig. 8)
The airflow detection system will detect the installation duct resistance and also react to
external wind conditions to ensure the fan maintains a constant extraction rate. This can
cause the fan to ramp up and down and in most applications will not be required. To turn
this feature on, complete the following:
Push switch (SW1) into the on position to turn on constant flow mode.
Push switch (SW1) into the off position to turn off constant flow mode.
(Factory set)
IMPORTANT – On first power up, the fan will run through its initialisation routine. This
will involve the fan running on maximum speed for 10-20 seconds. After which the fan
will run as normal and will not need to be initialised/calibrated again. The fan will
remember its settings if there is a power cut.
D. 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. Carefully push the front panel of the grille upwards away from the base part of the
grille (fig. 6).
3. Wipe the inlets and front face with a damp cloth until clean.
The fan has sealed for life bearings, which do not require lubrication.
Siting
the
fan.
 

5
Fig.2 Continuous boost (15l/s) with no trickle facility
Fig.3 Continuous trickle with boost facility
Fig.1 Continuous trickle (6l/s or 9l/s) with no boost facility
Fig.4. Removing the grille for wiring and setting the controls
1. Loosen screw. 2. Pull grille slightly away from
bottom edge.
3. Push grille upwards until
clear from the fan chassis.

6
Fig.8. Airflow detection system
Auto sensing mode = Push switch (SW1)
into the on position to turn on airflow
detection system.
Manual mode = Push switch (SW1) into
the off position to turn off airflow
detection system.
1
2
O
N
Fig.7. Speed Selection
9l/s = Remove Jumper Connector
6l/s = Replace Jumper Connector (factory set)
(For 15l/s, permanently link terminal
connections L to LS)
Flow rate conversion:
6l/s = 22m3/h
9l/s = 32m3/h
Fig.5. Accessing the control settings Fig.6. Removing the front grille panel for cleaning.
SW1 Dip
switch
On Off (factory set)
IMPORTANT:
DO NOT
CHANGE DIP
SWITCH 2.
LEAVE IN OFF
POSITION
1
2
O
N
JP1
JUMPER

PRODUCT FICHE
For Residential Ventilation Units (Complying Commission Delegated Regulation (EU)
No 1254/2014
Name: Vent‐Axia
ModelID(StockRef.):Lo‐CarbonCentra
dMEV‐441782
SECClassC
SECValue('Average')26.23
SECValue('Warm')11.86
SECValue('Cold')51.31
LabelRequired?(Yes/No=Outofscope)No
Declaredas:RVUorNRVU/UVUorBVURVU‐UVU
SpeedDrive2‐Speed
TypeHRS(Recuperative,Regenerative,None)None
ThermalEff:[(%),NA(ifnone)]N/A
Max.FlowRate(m3/h)54.00
Max.PowerInput(W):(@Max.FlowRate)2.40
LWA:SoundPowerLevel(dB)33.02
Ref.FlowRate(m3/s)0.01
Ref.PressureDiff.(Pa)N/A
SPI[W/(m3/h)]0.06
ControlFactor&ControlTypology:(CTRL/Typology)
ControlFactor;CTRL0.65
ControlTypologyLocalDemand
Control
Declared:‐MaxInternal&ExternalLeakageRates(%)forBVUs
orcarryover(forregenerativeheatexchangersonly),
‐&Ext.LeakageRates(%)forDuctedUVUs;
N/A
MixingRateofNon‐DuctedBVUsnotintendedtobeequipped
withoneductconnectiononeithersupplyorextractairside;N/A
PositionanddescriptionofvisualfilterwarningforRVUs
intendedforusewithfilters,includingtextpointingoutthe
importanceofregularfilterchangesforperformanceand
energyefficiencyoftheunit
N/A
ForUVUs(InstructionsInstallRegulatedSupply/ExtractGrilles
Façade)InF&W
InternetAddress(forDisassemblyInstructions)www.vent‐axia.com
Sensitivityp.Variation@+20/‐20Pa:(forNon‐DuctedVus)N/A
AirTightness‐ID/OD‐(m3/h)(forNon‐DuctedVus)N/A
AnnualElectricityConsumption:AEC(kWh/a)0.52
AnnualHeatingSaved:AHS(kWh/a)
AHS:Average26.23
AHS:Warm11.86
AHS:Cold51.31


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 Ltd, Fleming Way, Crawley, RH10 9YX
449430 B 1116
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 its products for two 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 effect your legal rights