Nuaire Group CYFAN Instruction Manual

Nuaire Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2085 8400 F: 029 2085 8444 E: [e-mail] W: www.nuaire.co.uk
1.0 CYFAN Extract Fans
The Nuaire CYFAN 230V/24V DC SELV extract fans have been
designed to ventilate areas such as the bathroom, toilet, kitchen,
utility rooms etc (splash zone 2).
The unit package offers the installer 2 alternative mounting options.
Fig 1a. Surface mounting on Fig 1b. Semi-Recessed
a cavity wall. mounting in a cavity wall.
Accessories and kits available for CYFAN:
•Wall mounting kit
Product Code Colour option
CYFAN-WALLKIT-WH White
CYFAN-WALLKIT-BR Brown
CYFAN-WALLKIT-COT Cotwolds
CYFAN-WALLKIT-TC Terracotta
•Optional window mounting kit (Part number: CYFAN-WKIT).
•Optional subsidiary spigot kit for ventilation of adjacent
bathroom/separate toilet (Part number: CYFAN-DKIT).
•Semi-recessed mounting kit (Part number: CYFAN-RKIT).
•Optional filter available (Part number: 7702017).
The unit discharges air through a 100mm or 125mm dia. spigot which
for surface and semi-recessed mounted units exits at the rear
of the unit. The subsidiary spigot kit allows the fan to extract
air through the side of the fan via a 50mm dia. spigot.
The motor is 24V brushless DC. Bearings are sealed, self-
lubricating ball type with integral locked rotor protection.
Units are supplied with a separate transformer enclosure
if fans are required for SELV usage.
2.0 Fan Installation General
Installation must be completed by qualified personnel.
A solid non reverberant mounting position must be
selected and passages for ductwork from the outlet
spigot, as well as electrical connection prepared.
Compatible ductwork should have already been installed.
Procedure
Unpack the fan unit and other components and ensure
all parts are included against the components checklist on the right.
121. 10. 13. Leaflet Number 671629
CYFAN Extract Fans
230V/24V DC SELV Surface and
Semi-Recessed Mounted Domestic Fans
Installation and Maintenance
Fig 3. General view of unit and components.
8
5
3
47
6
The EMC Directive
2004/108/EC
The Low Voltage
directive
2006/95/EC
13
12
10
11
9
1
Spring.
Key to fan components
Item No. Part No. Description Quantity
1. 041265 Fan Skirt 1
2. 041270 Recessed frame see fig 7. 1
3. 041269 Fan Body 1
4. 041266 Front cover 1
5. 041267 Fan Grille 1
6. 830296 PCB Assembly 1
7. 041277/8 Fan Scroll 1
8. 041568 PCB cover 1
9. 041275 125mm dia Spigot 1
10. 041276 100mm dia Spigot 1
11. 041285 125mm dia backdraught shutter 2
12. 041286 100mm dia backdraught shutter 2
13. 041279 Impeller 1
2.1 Back draught shutters Fig 2.
Are suitable for intermittent operation only
therefore are not to be fitted when using
in continuous operation.
On using intermittent operation we
recommend that the back draught shutters
are not fitted when duties are set less than
15 l/s and for installations other than directly
through the wall to avoid failure of the shutters
opening. Shutters are clipped into place.
Ensure the spring is fitted in lower position.

Isolation - Before commencing work make sure
that the unit, and Nuaire control are
electrically isolated from the mains supply.
Note: The product contains a safety feature which switches
off the fan when the fan grille is removed. Ensure this grille
is in place before attempting to power the fan up (see Fig 3).
2.2 Fan Installation - Surface Mounted
(230V Version)
Procedure
1. Unpack the unit and components. Remove the front cover and
grille assemblys.
2. Remove the PCB cover by removing screws.
3. Pull the PCB assembly forward, disconnect and remove the
fan assembly.
4. Place the unit in the mounting position and use the base as a
template to mark the discharge spigot and mounting holes onto
the surface.
5. Core cut the hole for the spigot to 100mm or 125mm dia.
6. Drill and plug the mounting surface if necessary and secure the
case to the surface taking care not to twist or distort the case.
7. If the pull-cord is not required - remove it completely.
8. Wire as per wiring diagram options, (see 2.4 below right).
9. Complete the installation by securing the PCB cover, the front
cover and grille assembly.
10. Adjust control settings as required.
2.3 Fan Installation - Surface Mounted
(24V Version)
Procedure
1. Unpack the unit and components. Remove the front cover and
grille assembly.
2. Remove the PCB cover by removing screws.
3. Remove the PCB assembly from the fan body by pulling forward
and disconnect and remove the fan assembly.
4. Separate section 2 of the PCB from section 1 by cutting the tabs
in the positions shown. (see fig 5).
5. Place section 1 of the PCB into the transformer enclosure
supplied with the fan (see fig 14/15b). Install the transformer as
the instructions in section 5.1.
6. Replace section 2 of the PCB into the fan unit. Complete the
installation of components by securing the PCB cover on the fan.
7. Place the unit in the mounting position and use the base as a
template to mark the discharge spigot and mounting holes onto
the surface.
8. Core cut the hole for the spigot to 100mm or 125mm dia.
9. Drill and plug the mounting surface if necessary and secure the
case to the surface taking care not to twist or distort the case.
10. If the pull-cord is not required - please remove it.
11. Wire as per 24V wiring diagram, (see 2.4 below right).
12. Complete the installation by securing the front cover and
grille assembly.
13. Adjust control settings as required.
Fig 4. Remove PCB cover from casing.
Fig 5. Separate section 1 of the PCB (Power supply 230V/24V) from
section 2 (Control PCB 24V DC) by cutting the tabs in the positions
shown with the dotted circles.
2.4 Wiring options
221. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
PCB coverPCB assembly
Section 2 (Control PCB 24V DC)
Motor connection
Mains supply
24V SELV
output
24V SELV
input
Connection
to pull-cord
SL N L
Transformer
Terminal block
SL
0
24V
24V
0
SL
Terminal block
Section 1
(Power supply
230V to 24V)
SL
N
L
Optional lamp
N
L
Fuse 2A
Mains
230V
50Hz
Fan unit
Remote/light switch
Unit serving bathroom (via remote switch)
N
LFuse 2A
Mains
230V
50Hz
Fan unit
Unit serving bathroom or kitchen (via pull-cord)
N
L
24V
0
SL
N
LFuse 2A
Mains
230V
50Hz
3 Pole isolator
24V SELV Wiring (via remote switch)
N
LFuse 2A
Mains
230V
50Hz
2 Pole isolator
24V SELV Wiring (via pull-cord)
SL
N
L
24V
0
SL
N
L
24V
0
Transformer
Box
Link required
24V
0
SL
Fan unit
(Section 2 PCB)
Transformer
Box
Fan unit
(Section 2 PCB)
2 Pole isolator
3 Pole isolator

Note: For 24V version, follow points 4, 5 and 6 in (in section 2.3
Fan Installation - Surface Mounted 24V Version)
on page 2, as a transformer must be used with 24V versions.
24V fan units must be installed in accordance with these
instructions and IEE Wiring Regulations BS7671
for SELV installations.
For good EMC engineering practice, any sensor
cables or switched live cables should not be placed within 50mm
of other cables or on the same metal cable tray
as other cables.
321. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
Mounting
Flange
Mounting
Plate
3 screw set
(supplied)
Mounting
Plate.
A
AAA
Ceiling.
Ceiling.
Cut bracket flush with
mounting surface of wall
Fan unit rear
spigot fits
into back of
mounting
frame and
into ducting
Fan Unit
Semi-Recessed
mounting flange
Mounting
plate
185mm
200mm
2.5 Fan Installation - Semi-Recessed
Mounting (230V and 24V Versions)
Fig 7. Optional extra Semi-Recessed mounting frame kit suitable
for 100mm and 125mm dia duct, consists of mounting plate and
mounting flange.
Fig 8.Wall mounted using the Semi-Recessed mounting kit.
Procedure
1. Prepare an opening 200mm x 185mm in the mounting position.
It is assumed that a solid, non-reverberant mounting position
has been selected and the necessary compatible ductwork is
already installed.
2. Position the mounting bracket in the previously prepared
aperture so that the ends of the bracket are flush with the
surface of the wall. Secure the bracket top and bottom with
suitable fixings (by others).
3. Unpack the fan unit and components. Remove the front cover
and grille assembly by removing screws, and remove the fan
skirt.
4. Fit frame to fan body.
5. Remove the PCB cover by removing screws.
6. Pull the PCB assembly forward and disconnect the fan assembly.
7. Remove the fan assembly.
8. Secure the back of the fan case to the mounting bracket using
the 3 screws supplied taking care not to twist or distort the case.
Note: Fit mounting flange to fan before securing to bracket.
9. If the pull-cord is not required - remove it completely.
10. Wire as one wiring diagram option, (see 2.4).
11. Complete the installation by securing the PCB, the PCB cover, the
fan assembly, front cover and grille assembly.
12. Adjust control settings as required.
Fig 9. Semi-Recessed mounting plate installed into wall aperture.
Fig 10. Ceiling mounting using the Semi-Recessed mounting kit.
First cut an aperture for the fan in the ceiling, cut and fit (A) timber
supports (not supplied) and fit fan as shown. Note: Remove the
shutters from the spigot if you are mounting CYFAN in the ceiling.
Note: pull-cord must be removed.
Part No. 041270.
Part No. 770216.

Note: For 24V version, follow points 4, 5 and 6 in (in section 2.3
Fan Installation - Surface Mounted 24V Version)
on page 2, as a transformer must be used with 24V versions.
421. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
Fan with spigot kit.
subsidiary spigot kit inner fan
body with 2 spigot holes.
subsidiary spigot kit outer
fan skirt with 1 spigot hole.
Install the 50mm dia. subsidiary spigot from inside both the
inner fan body and outer skirt. Turn the spigot a quarter turn to
lock.
Reinstall inner fan
components, grille and
outer front cover.
The outer fan skirt can be
rotated if required which
enables the spigot hole to
be positioned on the right
or left side to meet the
application requirements.
2.6 Fan Installation - Optional subsidiary
Spigot Kit (230V and 24V Versions)
For ventilation of bathroom and separate
toilet when adjacent to each other.
The subsidiary Spigot Kit incorporates:
1. A new outer fan skirt with one 50mm dia. hole in the side.
2. A new fan body with a 55mm dia. hole in each side.
3. A 50mm dia. sub spigot.
Fig 11. Example of a subsidiary spigot kit (Code: CYFAN-DKIT).
Note: 50mm grille available (Code: 501G).
Procedure
1. Unpack the fan unit and components, and the subsidiary
spigot kit.
2. Remove the front cover and grille assembly from the fan unit by
removing screws.
3. Remove the PCB cover by removing screws.
4. Pull the PCB assembly forward and disconnect the fan assembly.
5. Remove the fan assembly.
6. Reinstall all of the components into the inner fan body of the
subsidiary spigot kit. The inner fan body should now be installed
into the outer fan skirt supplied with the subsidiary spigot kit.
Ensure that the spigot hole in the side of the outer fan skirt is on
the correct side, as this outer casing can be rotated to meet the
application requirements (see fig 11).
7. Install the 50mm dia. spigot from inside the inner fan body
through the hole in the fan body and outer fan skirt. (see fig 11).
8. Wire as one wiring diagram option, (see 2.7 below).
9. Install fan unit and duct as required.
Fig 12. Typical installation example of fan unit with subsidiary spigot
kit in bathroom and adjacent toilet application.
2.7 Wiring options
Fuse 2A
N
L
Mains
230V
50Hz
Wiring for two room installation (No Run-on)
Wiring for two room installation (Using Run-on)
Fan unit
N
L
Fuse 2A
N
L
Mains
230V
50Hz
Fan unit
SL
N
L
2 Pole isolator
3 Pole isolator
24V
0
SL
N
LFuse 2A
Mains
230V
50Hz
3 Pole isolator
24V SELV Wiring (via remote switch)
N
LFuse 2A
Mains
230V
50Hz
2 Pole isolator
24V SELV Wiring (via pull-cord)
SL
N
L
24V
0
SL
N
L
24V
0
Transformer
Box
Link required
24V
0
SL
Fan unit
(Section 2 PCB)
Transformer
Box
Fan unit
(Section 2 PCB)

5
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
3.0 Fan Unit Dimensions (mm)
208
207
124 dia.
99 dia.
201
179
137
Front view Back view
Top view Side view
21. 10. 13. Leaflet Number 671629

621. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
4.0 CYFAN Controls
Fig 13.View of PCB assembly control cover and functions.
a) Default setting
As a default Cyfan units are set as follows:
•Intermittent setting – fan will only operate from pull-cord or
switched live to boost flowrate
•Continuous running (background ventilation) – OFF
•Humidity sensing – OFF
•Air flow rate (boost) – 30 l/s
•Run-on timer (from switched live only) – 1 min
b) Building regulations Part F 2010
flowrates
Room Intermittent extract Continuous extract
Minimum rate Minimum Minimum
high rate low rate*
Kitchen 30 l/s adjacent to hob; 13 l/s 8 l/s
or 60 l/s elsewhere
Utility room 30 l/s 8 l/s 6 l/s
Bathroom 15 l/s 8 l/s 6 l/s
Sanitary 6 l/s 6 l/s 6 l/s
accommodation
*Recommended values, please refer to Part F for further information
c) Continuous/intermittent switch
Continuous – fans running to provide background ventilation. The
amount of airflow can be set between 6 to 30 l/s.
Operating the pull cord or remote switch will boost the fan to the
adjustable set point available between 8 to 60l/s
Intermittent – fan does not operate continuously but only when the
pull cord or remote switch is activated. The amount of airflow is
adjustable from 8 to 60 l/s.
d) Humidity switch
The default setting is off. Switching to ‘on’ will enable the unit to
sense the humidity in the room. The fan will switch itself on when
the humidity rises above 50% and will slowly speed up as the
humidity rises. The maximum speed will be that set by the boost
dial.
e) Run-on timer
The run-on timer is adjustable from 1 to 30 mins and can operate
off a remote switch (e.g. bathroom light switch).
f) Airflow adjustment
The unit adjustment dials have been set for a unit that has been
installed directly through a wall and with a 125mm spigot. If the
100mm spigot is used and resistance is placed on the fan (long duct
runs) the airflow should be checked using an appropriate measuring
instrument.
g) Special installations
For ventilation from two rooms (section 2.7) boost setting should be
set at 30 l/s to enable sufficient ventilation from the toilet area.
Power Consumption 230V
Unit input power (watts) 33
Full load current (amps) 0.3
Starting Current (amps) 0.3
5.0 Installation of Transformer Enclosure
(24 Volt units only)
The enclosure containing the transformer is intended to be mounted
out of sight (e.g. in a loft, cupboard, under floorboards etc.).
However, if this is not possible the transformer enclosure should be
mounted as close to the ceiling, or as far from the "splash zone" as
possible (see below for definition of the splash zone).
As can be seen from the table of wiring sizes, it is advisable to place
the enclosure as close to the fan as possible to reduce the costs of
wiring and assist in installation.
‘Splash zone’
The ‘Splash Zone’ can be considered to be an area within a bathroom
or shower room where a person using the bath or shower can
effectively reach.
An arms reach is defined as 0.6 metres from the edge of the bath or
shower up to a height of 2.25 metres.
continued on page 7.
Fan Failure
Boost
Humidity
Fan Run
Humidity
off/on
Continuous/
intermittent
operation
630
15
Continuous
(l/s)
Intermittent/
boost (l/s)
60
30
15
30
15
1
Run-on
(mins)
8
Part Number 060914

5.1 Procedure for fitting the transformer
1. Remove the cover.
2. Position the base enclosure on mounting surface and route
cables through knockouts. Mark the fixing points on the
mounting surface. Secure using suitable fixings (by others).
3. Before fitting the PCB into the enclosure connect wiring as
shown in (24V wiring and fig 5. page 2). Fit section 1 of the PCB
by first slotting the bottom edge (see fig 14/15b) into the fixing
clip inside the base of the enclosure then press on the
transformer and terminal block until the PCB clicks into place.
Complete by replacing the cover using the screws provided.
4. Keep vents clear of obstruction.
Note: No earth is to be connected between transformer and fan.
Fig 14.View of section 1 of PCB assembly.
Section 1 (Power supply 230V to 24V)
Mains supply
24V SELV
output
SL N L
Transformer
Terminal block
Bottom edge of PCB.
SL
0
24V
Terminal block
6.0 Maintenance
CYFAN - designed for ease of cleaning
It is recommended that all units are inspected and cleaned
approximately every eighteen months. Clip off the front facia,
remove the grille and a magnet will deactivate the fan. Remove the
impeller and clean in warm soapy water, The fan will re-start when
the impeller, grille and front cover are replaced.
Fig 16. Cleaning impeller.
7.0 Optional filter
Filters are available to fit inside the grille of the fan unit.
Optional filter (Part number 770217).
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.
9.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our Technical Support
department will be happy to provide any assistance required.
Technical Support
on 029 2085 8400
721. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
120mm 85mm
35mm
40mm
85mm
Side view End view
Plan view
Cover fixings
Section 1 of PCB
Bottom fixing clip
Top fixing clip
Fig 15a. 24V Transformer dimensions (mm) and details.
Note to installing
electrician:
To avoid cable
insulation contact
with hot
transformer, always
use the knockout at
PCB end.
Removing the impeller for cleaning.
Note: The impeller only fits on one way to ensure correct balancing.
5.2 Transformer Installation notes for
wiring sizes
It is important to note that the size of wire used between the
transformer and the fan unit can have an adverse effect on the
units performance if the following table is not adherred to.
Mains Supply: (230V) 0.5mm sq.
Transformer to fan (24V units only)
Cable run (max. 10 metres) Cable size
Up to 2m 0.75 mm sq.
Up to 4m 1.0 mm sq.
Up to 6m 1.5 mm sq.
Up to 10m 2.5 mm sq.
Fig 15b. Place section 1 of the PCB into the enclosure supplied with
the fan, and install as instructions opposite.

821. 10. 13. Leaflet Number 671629
Installation and Maintenance CYFAN 230V/24V SELV Surface and Semi-Recessed Mounted Domestic Fans
Western Industrial Estate
Caerphilly United Kingdom
CF83 1NA
T: 029 2085 8400
F: 029 2085 8444
E: [e-mail]
W: www.nuaire.co.uk
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.