NuAire FAITH User manual

04. 11. 19. Document Number 671871 1
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
FAITH (dMEV)
230V / 24V DC SELV Flush Mounted
Domestic Continuous Extract Fans
Installation and Maintenance IPX4*
1.0 SAFETY INFORMATION
•The installation must be completed by competent persons in accordance with good
industry practice and should conform to all governing and statutory bodies i.e. IEE,
CIBSE, HVCA, etc.
•If the environment in which the product is installed also houses a fuel-operating
device (water heater, methane stove etc. that is not a “sealed chamber” type), it
is essential to ensure adequate air intake, to ensure good combustion and proper
equipment operation.
•Ensure adequate air return into the room in compliance with existing regulations in
order to ensure proper device operation. Ensure the fans capability by checking the
performance fan curve. Flexible ducting is not recommended.
•Disconnection from the supply mains must be incorporated within the fixed wiring in
accordance with the wiring regulations and shall have a minimum contact separation
of 3mm in accordance with the latest edition of the IEE Wiring Regulations.
•In case of window installation it is necessary to use the appropriate window kit,
which is not included. Glass thickness from 11mm to 35mm.
•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 supervision or instruction concerning use of the appliance
in a safe way and understand the hazards involved. Cleaning and user maintenance
should not be made by children without supervision. The unit is not intended for use
by persons (including children) with reduced physical, sensory or mental capacities
or those with a lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the unit from a person responsible for
their safety. Children should be supervised to ensure that they do not play with the
unit.
*For wall/window mounted installations only

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Installation and Maintenance FAITH - 230V / 24V SELV Extract Fans
2
2.0 INTRODUCTION
These high quality extractor fans are mechanical ventilation units
designed to ensure air extraction in small / medium sized rooms. The
units are suitable for air discharge directly to the outside or in the
presence of short ducted system.
Please read these instructions carefully before installing the fan unit.
Failure to comply with these instructions could reduce both the life and
performance of the product and may invalidate the warranty. Nuaire
assume no responsibility for damage to persons or property resulting
from failure to observe the regulations contained in this booklet.
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 supervision
or instruction concerning use of the appliance in a safe way and
understand the hazards involved. Cleaning and user maintenance
should not be made by children without supervision. The unit is not
intended for use by persons (including children) with reduced physical,
sensory or mental capacities or those with a lack of experience and
knowledge, unless they have been given supervision or instruction
concerning use of the unit from a person responsible for their safety.
Children should be supervised to ensure that they do not play with the
unit.
2.1 Unit Features
•Construction Material: High quality, impact and UV-resistant ABS.
•Unit fascia is removable for cleaning without the use of tools.
•Single phase DC brushless motor with locked rotor protection.
•Motor mounted on high quality ball bearings.
•The fan is double insulated: no earth connection is required.
•Trickle speed selectable: 4, 6, 8, 10, 13 l/s or off.
•Option to boost through a Switch Live (SL) connection or pull cord.
Boost speed selectable: 8, 13, 15, 18, 20 or 25 l/s.
•Three button, three digit 7 segment LED display, for configuration
•Installation type selection available (through wall or ducted).
•Timer and integral humidistat.
•Constant volume facility.
•IPX4 rating with wall installation.
•Power supply 220V to 240V~ 50/60Hz.
•Operating temperature: 0°C to +40°C
2.2 Code Descriptions
UNIT DESCRIPTION
FAITH 230V Continuous Mixed Flow Extract Fan
FAITH 230V Decentralised Mechanical Extract Ventilation
fan (dMEV) – see Section 6.11
FAITH-SELV SELV 24V D.C. Extract Fan
FAITH-WKIT Window Kit for FAITH Units
FAITH-WP Wall Plate for FAITH Units
3.0 DIMENSIONS
164
82
46
Ø 99
101
15
15
134
61
134
61
42
134
115
Figure 1. FAITH Dimensions
Figure 2. SELV Transformer Dimensions

04. 11. 19. Document Number 671871 3
Installation and Maintenance
4.0 INSTALLATION
Before commencing any work read the following instructions carefully
and ensure you have the necessary competency to complete the work
safely.
The installation must be completed by competent persons in
accordance with good industry practice and should conform to all
governing and statutory bodies i.e. IEE, CIBSE, HVCA, etc.
If the environment in which the product is installed also houses a
fuel-operating device (water heater, methane stove etc., that is not a
“sealed chamber” type), it is essential to ensure adequate air intake, to
ensure good combustion and proper equipment operation.
Ensure adequate air return into the room in compliance with existing
regulations in order to ensure proper device operation. Ensure the fans
capability by checking the performance fan curve. Flexible ducting is
not recommended.
Ensure that the fan or exhaust grille are not obstructed, to guarantee
optimum air passage.
4.1 Wall Installation (FAITH and FAITH-SELV)
1. Select a suitable position for the fan that keeps the duct as short
and as straight as possible (ideally on a wall within 400mm of the
ceiling).
2. Cut a hole in the wall to suit the outside diameter of the ducting or
wall-liner. Install the duct or wall-liner taking care to seal at both
ends between it and the wall using proprietary waterproof mastic.
3. Remove the magnetic fascia of the fan by pulling the fascia straight
off.
4. Loosen the front fan plate by unscrewing the front fixing screws
(Figure 3).
5. Use a small flat-head screwdriver to release the retaining clips
between the front fan plate and fan backplate. Remove front fan
plate (Figure 4).
6. Position the fan in the duct and mark the four retaining screw
positions through the fan backplate. Fit screw anchors suitable for
the wall construction.
7. If installing via recessed cable entry, drill a hole of sufficient diameter
in the fan backplate to fit the rubber grommet and allow the supply
cable to pass through the backplate (Figure 5).
8. Screw the backplate to the wall in positions marked earlier.
9. For surface cable entry remove the white rubber cable gland (Figure
6) and cable clamp from the backplate, cut the cable gland to the
required diameter and thread the supply cable through the gland.
Slot the gland into place in the fan backplate.
10. For recessed cable entry, fit the rubber grommet into the hole
drilled in step 7 and thread the supply cable through the grommet.
11. Complete the wiring by following the relevant wiring diagram in
section 5.0. Ensure that the cable gland is slotted into place in the
backplate, for surface cable entry the cable is to be secured via the
cable clamp (Figure 7 & Figure 8).
12. Replace the front fan plate, an audible "Click" should be heard
when the front cover clips into place. Fix with the screws provided,
and replace the fascia.
Figure 3. Unscrewing
front fixing screws.
Figure 4. Releasing
retaining clips with
flat-head screwdriver.
Figure 5. Drilling fan
backplate for recessed
cable entry.
Figure 6. Removing cable
gland for surface cable
entry.
Figure 7. Cable
installation for surface
cable entry.
Figure 8. Cable
installation for
recessed cable entry.

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Installation and Maintenance FAITH - 230V / 24V SELV Extract Fans
4
Figure 9. Drilling
SELV transformer
backplate for
recessed cable
entry.
Figure 10.
Removing
cable glands
and clamps for
surface cable
entry.
Figure 11.
Securing supply
cable with
cable glands
and clamps for
surface cable
entry.
Figure 12.
Removing
cable glands for
recessed cable
entry.
Figure 13. Fitting
cable glands for
recessed cable
entry.
4.2 SELV Transformer Installation (FAITH-SELV Only)
1. Remove the cover of the SELV transformer by unscrewing the front
fixing screws.
2. Select a suitable position for the SELV transformer and mark the four
retaining screw positions through the transformer backplate.
3. If installing via recessed cable entry, drill a hole of sufficient
diameter in the backplate for the supply cable (Figure 9).
4. Fit screw anchors suitable for the wall construction and screw the
backplate to the wall in positions marked earlier.
5. For surface cable entry remove the two white rubber cable
glands from the backplate (Figure 10), cut the cable glands to the
required diameter, thread the supply cables through the glands
whilst ensuring the cable glands are both slotted into place in the
backplate and that the cables are secured via the cable clamps
(Figure 11).
6. For recessed cable entry remove the two white rubber cable glands
from the backplate (Figure 12) and slot them into place in the
transformer backplate (Figure 13).
7. Complete the wiring by following the relevant wiring diagram in
section 5.0.
8. Replace the SELV transformer cover and fix in place with the screws
provided.

04. 11. 19. Document Number 671871 5
Installation and Maintenance
5.0 WIRING
Disconnection from the supply mains must be incorporated within the
fixed wiring in accordance with the wiring regulations and shall have
a minimum contact separation of 3mm in accordance with the latest
edition of the IEE Wiring Regulations.
Before connecting the product to the power supply or the power outlet,
ensure that:
•The data plate (voltage and frequency) correspond to those of the
electrical mains.
•The electrical power supply/socket is adequate for maximum unit
power. If not, contact a qualified technician.
The electrical system to which the unit is connected must comply with
regulations.
5.1 FAITH
Mains
230V
50Hz
L
N
Fuse 2 amp
(BS 1362)
Double
Pole Switch Optional
Lamp
3 Pole
Isolator Fan Unit
230V
AC
LS
L
N
Mains
230V
50Hz
L
N
Fuse 2 amp
(BS 1362)
Double
Pole Switch Optional
Lamp
3 Pole
Isolator SELV Power
Unit
Fan Unit
24V
DC
24V
DC
230V
AC
LS
L
N
+
-
S
-
+
S
Mains
230V
50Hz
L
N
Fuse 2 amp
(BS 1362)
2 Pole
Isolator SELV Power
Unit
Fan Unit
24V
DC
24V
DC
230V
AC
LS
L
N
+
-
S
-
+
S
5.2 FAITH-SELV
Figure 14. 3 Core FAITH Wiring
Figure 16. 3 Core FAITH-SELV Wiring
Figure 17. 2 Core FAITH-SELV Wiring
IMPORTANT
When wiring to the PCB terminals, do not overtighten the screws.
IMPORTANT
Do not over tighten terminal block screws, maximum torque 0.15Nm
Mains
230V
50Hz
L
N
Fuse 2 amp
(BS 1362)
2 Pole
Isolator Fan Unit
230V
AC
LS
L
N
IMPORTANT
Isolation: Before commencing work, ensure the unit, switched live
and any controls are electrically isolated from the electric supply.
Figure 15. 2 Core FAITH Wiring

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Installation and Maintenance FAITH - 230V / 24V SELV Extract Fans
6
6.0 OPERATION
Read this manual carefully before operating the product and keep it in a
safe place for reference.
The unit is provided with a 7 segment LED display which is visible by
removing the fascia. The LED display illuminates upon pressing any
button, and stays on for 10 seconds after the last button press.
IMPORTANT
Additional Safety Feature: When the front cover support is
removed, the impeller stops turning. To aid with installation, this
feature is disabled for the first 60 minutes of operation.
6.1 Description of Operation
Upon power-up, the unit works at 'trickle' speed ('A').
If humidistat is activated, the unit works at 'comfort boost' speed ('b').
If the SL or pull-cord is activated, the unit runs at 'boost' speed ('B').
After the pull cord switch is turned off, the fan continues to run at
'boost' speed for a settable period of time, then it returns to selected
'trickle' speed (or to 'comfort boost' speed in case automatic humidistat
operation is on). The front cover LED illuminates to indicate when the
pull cord switch is on.
The run-on timer function is activated only if the SL has been on for
at least 3 minutes. This function does not activate with use of the pull
cord.
6.2 Run Hours Monitor
An integral run time monitor is included with the unit. Upon power-up
the display shows the running hours counter in a user friendly format.
E.g. -> (1 year) -> (4 months) -> (6 days) ->
(13 hours) -> ...
Note that due to the format of a 7 segment display 'm' cannot be used
for months with being displayed in its place.
6.3 Unit of Measure
All air volumes shown on the unit for trickle, comfort boost and boost
and in litres per second (l/s), this is displayed on the unit as a lower case
'u' ( ).
Unit of Measure ( )
Setting Value Displayed
l/s (Default)
6.4 Trickle Speed
Upon power up and in the absence of an active SL or pull cord, the unit
will run continuously at a settable trickle speed of between 0-13 l/s.
6.4.1 Setting Trickle Speed
Select the trickle speed setting on the unit by pressing the menu button
until the first digit on the 7 segment display shows an upper case 'A'
( ).
Press '+' or '-' to raise and lower the trickle speed between the values
given in the table below.
Trickle Speed ( )
Setting (l/s) Value Displayed
0
4 (Default)
6
8
10
13
6.5 Comfort Boost Speed
The unit will run at a settable comfort boost speed of between 6-25 l/s
when either of the below conditions have been met.
•The humidistat has been activated.
•The run-on timer has been activated.
6.5.1 Setting Comfort Boost Speed
Select the comfort boost speed setting on the unit by pressing the
menu button until the first digit on the 7 segment display shows an
lower case 'b' ( ).
Press '+' or '-' to raise and lower the comfort boost speed between the
values given in the table below.
Comfort Boost ( )
Setting (l/s) Value Displayed
6
8
10
13 (Default)
15
18
20
25*
* 25 l/s is only available when through the wall installation is selected
(see section 6.8).
6.6 Boost Speed
The unit and will run at a settable boost speed of between 8-25 l/s
when either of the below conditions have been met.
•The SL (Switched Live) has been activated.
•The pull cord has been activated.
6.6.1 Setting Boost Speed
Select the boost speed setting on the unit by pressing the menu button
until the first digit on the 7 segment display shows an upper case 'B'
( ).
Press '+' or '-' to raise and lower the boost speed between the values
given in the table below.
Menu Minus (-) Plus (+)
Figure 18. 7 segment display buttons

04. 11. 19. Document Number 671871 7
Installation and Maintenance
Boost ( )
Setting (l/s) Value Displayed
8
13
15
18
20
25* (Default)
* 25 l/s is only available when through the wall installation is selected
(see section 6.8).
6.7 Constant Flow Operation
Selecting constant flow operation allows the unit to alter its speed to
account for variations in external resistance caused by changing wind
conditions, ensuring the chosen airflow rate is supplied. This option will
not disable trickle or boost functions.
6.7.1 Choosing Constant Flow
Select constant flow on the unit by pressing the menu button until the
first digit on the 7 segment display shows a lower case 'c' ( ).
Press + or - to raise and select the appropriate installation type as given
in the table below.
Constant Flow ( )
Setting Value Displayed
Off (Default)
On
6.8 Installation Type
The unit will scale its speed to obtain the air flow rates given for the
trickle, comfort boost and boost speeds based on installation type.
'Through Wall' installation is typically for fans that are mounted on an
external wall / window and extract direct to the outside.
An 'In Room' installation is typically for fans that are mounted on the
ceiling or internal wall and which are ducted to the outside. Note, the
unit will run at a higher RPM when 'In Room' installation is selected.
6.8.1 Setting Installation Type
Select the installation type on the unit by pressing the menu button
until the first digit on the 7 segment display shows an upper case 'I'
( ).
Press + or - to raise and select the appropriate installation type as given
in the table below.
Installation Type ( )
Setting Value Displayed
Through Wall (Default)
In Room - Ducted
6.9 Humidity
An integral humidistat is included with the unit and has an adjustable
threshold of 65-95%. If the humidistat is activated, the unit runs at
comfort boost speed and continues running for a fixed 5 minute
run-on cycle after humidity levels drop below the selected threshold.
In AUTO mode, the humidistat triggers if there’s a steep humidity
variation and humidity is over 65%.
6.9.1 Setting the Humidistat
Select the humidistat setting on the unit by pressing the menu button
until the first digit on the 7 segment display shows a lower case 'h' ( ).
Press the '+' or '-' to raise and lower the humidistat threshold between
the values given in the table below.
Humidistat Threshold ( )
Setting Value Displayed
AUTO (Default)
65%
75%
85%
95%
OFF
6.10 Run-on Timer
An integral run-on timer is included with the unit which is easily
adjustable between 1-25 minutes. When the SL is deactivated, the unit
runs at comfort boost speed and continues running for a fixed time run-
on cycle according to the setting of the run-on timer.
After the run-on time has expired, the unit returns to trickle speed.
If the SL does not stay active for 3 minutes run-on is not performed.
In AUTO mode the run-on timer works automatically according to
the user's habits with the run-on time increasing depending on how
long the SL is active. The principles behind this mode of operation are
described below.
•If SL is active for under 3 minutes, the unit does not run-on.
•If SL is active for between 3-10 minutes, the unit runs-on for 5
minutes.
•If SL is active for between 10-20 minutes, the unit runs-on for 10
minutes.
•If SL is active for over 20 minutes, the unit runs-on for 15 minutes.
6.10.1 Setting the Run-on Time
Select the run-on time setting on the unit by pressing the menu button
until the first digit on the 7 segment display shows a lower case 't' ( ).
Press '+' or '-' to raise and lower the run-on time between the values
given in the able below.
Run-On Timer ( )
Setting (minutes) Value Displayed
AUTO (Default)
1
5
10
15
20
25
OFF

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Installation and Maintenance FAITH - 230V / 24V SELV Extract Fans
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6.11 Decentralised Mechanical Extract Ventilation (dMEV)
FAITH units are suitable for decentralised mechanical extract
ventilation and are recognised by the Government’s Standard
Assessment Procedure (SAP) under the Product Characteristic Database
(PCDB).
In order to meet requirements, the unit must be set to the below
specifications:
•Run continuously (see Section 6.4) at 4, 6 or 8l/s, depending on
the requirements under Part F of the building regulation, Table 5.1a.
•Boost speed (see Section 6.6) should be set at 6, 8 or 13 l/s, again
see Building Regulation Part F Table 5.1a.
•Comfort Boost (see Section 6.5) should be set between trickle
speed and boost speed settings .
•Constant Flow – ON (see Section 6.7).
•Through Wall or In-Room (ducted) installation (see Section 6.8).
•All other settings are as per customers’ requirements.
7.0 MAINTENANCE
Before any maintenance or cleaning operation, switch off the fan and
disconnect from the power supply.
The magnetic front cover can be removed and cleaned with water and
a mild detergent using a soft cloth and the motor fan assembly can
be cleaned with a dry brush or dry cloth. Any other maintenance or
cleaning should be carried out by properly qualified personnel.
Ensure the unit does not come into contact with any kind of liquid
or solvent. If this should occur, contact a qualified technician before
reassembling the fan.
NOTE: The motor does not require lubrication as it is of the
maintenance free "sealed for life" type.
8.0 WARRANTY
The 5 year warranty starts from the day of delivery and includes parts
and labour for the first year. The remaining period covers replacement
parts only.
This warranty is void if the equipment is modified without
authorisation, is incorrectly applied, misused, disassembled, or not
installed, commissioned and maintained in accordance with the details
contained in this manual and general good practice.
The product warranty applies to the UK mainland and in accordance
with Clause 14 of our Conditions of Sale.
If any abnormalities in operation are detected, disconnect the unit from
the supply and contact a qualified technician immediately. Use original
spare parts only for repairs.
If the supply cord is damaged, it must be replaced by the manufacturer,
its service agent or similarly qualified persons in order to avoid a hazard.
Technical or commercial considerations may, from time to time, make it necessary to alter the design, performance and dimensions of equipment
and the right is reserved to make such changes without prior notice.
9.0 DISPOSAL AND RECYCLING
Information on disposal of units at the end of life.
This product complies with EU Directive 2002/96/EC.
The symbol of the crossed-out dustbin indicates that this
product must be collected separately from other waste at
the end of its life. The user must, therefore, dispose of the
product in question at suitable electronic and electro-
technical waste disposal collection centres, or else send
the product back to the retailer when purchasing a new,
equivalent type unit.
Separate collection of decommissioned equipment for recycling,
treatment and environmentally compatible disposal helps to prevent
negative effects on the environment and on health and promotes the
recycling of the materials that make up the equipment.
Improper disposal of the product by the user may result in
administrative sanctions as provided by law.
10.0 AFTER SALES ENQUIRIES
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department.
Telephone [phone]
[e-mail]