NuAire CYFAN User manual

1
18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFAN
230V / 24V DC SELV Surface Mounted &
Semi-Recessed Domestic Extract Fans
Installation Manual
IPX4*
*Wall / Window
Mounted
Installations Only
1.0 SAFETY INFORMATION
• The provision of the electrical supply and the connection of the unit to the electrical supply
must be carried out by a qualified electrician in accordance with latest edition of the wiring
regulations.
• 24V fan units must be installed in accordance with these instructions and IEE Wiring Regulations
BS7671 for SELV installations.
• In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance
must not be supplied through an external switching device, such as a timer, or connected to a
circuit that is regularly switched on and off by the utility.
• All-pole disconnection from the mains as shown in the wiring diagram must be incorporated
within the fixed wiring and shall have a minimum contact separation of 3mm in accordance with
latest edition of the wiring regulations.
• Isolate from power supply before removing any covers. During installation / maintenance ensure
all covers are fitted before switching on the mains supply.
• Ducting must be securely fixed with screws to the spigot to prevent access to live parts. Duct
runs terminating close to the fan must be adequately protected by suitable guards.
• Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.
• This appliance should not be used by children or persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge, unless they have been given supervision
or instruction concerning the safe use of the appliance by a person responsible for their safety.
Children shall not play with the appliance. Cleaning and user maintenance shall not be carried
out by children.
1.1 Hazard Symbols
REFER TO INSTRUCTION MANUAL
Read and understand the installation and maintenance manual before installing,
operating or maintaining this product.
1.2 Important Information
This manual contains important information on the safe and
appropriate assembly, transport, commissioning, operation,
maintenance, disassembly and simple troubleshooting of the product.
While the product has been manufactured according to the accepted
rules of current technology, there is still a danger of personal injury or
damage to equipment if the following general safety instructions and
the warnings contained in these instructions are not complied with.
•Read these instructions completely and thoroughly before
working with the product.
•Keep these instructions in a location where they are accessible
to all users at all times.
•Always include the operating instructions when you pass the
product on to third parties.
1.3 Personal Protective Equipment
The following minimum Personal Protective Equipment (PPE) is
recommended when interacting with Nuaire product:
•Protective Steel Toed Shoes - when handling heavy objects.
•Full Finger Gloves (Marigold PU800 or equivalent) - when
handling sheet metal components.
•Semi Fingerless Gloves (Marigold PU3000 3DO or equivalent)
- when conducting light work on the unit requiring tactile
dexterity.
•Safety Glasses - when conducting any cleaning/cutting operation
or exchanging filters.
•Reusable Half Mask Respirators - when replacing filters which
have been in contact with normal room or environmental air.
Nuaire would always recommend a site specific risk assessment by a
competent person to determine if any additional PPE is required.

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
2.0 INTRODUCTION
The Nuaire CYFAN centrifugal extract fan is a major advancement
and has been designed to meet the flow rates for all wet room
applications such as the bathroom, kitchen, utility and WC etc.
The unit discharges air through a 100mm or 125mm diameter 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 diameter 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.
2.1 Unit Operation Includes 230V To 24V Conversion,
Continuous Or Intermittent
The fan can be converted to operate as a 24V DC SELV for zone 1
and 2 applications. The fan has the option to select continuous or
intermittent operation up to an installed performance of 60 l/s.
2.2 Mounting options
The CYFAN range can be:
•Surface Mounted
•Semi-Recessed Mounted: Using the optional extra Semi-Recessed
mounting frame kit suitable for 100mm and 125mm diameter
duct, consists of mounting plate and mounting flange.
•Window Mounted: Using the optional kit.
•Surface Mounted With Side Spigot: Using the optional kit (see
section 2.3 for part numbers).
2.3 CYFAN Ancillaries
•Wall Mounting Kit
Part Number Colour
CYFAN-WALLKIT-WH White
CYFAN-WALLKIT-BR Brown
CYFAN-WALLKIT-COT Cotswold
CYFAN-WALLKIT-TC Terracotta
•Optional window mounting kit - Part number: CYFAN-WKIT
•Optional 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
2.4 Box Contents
The following components are included:
2.4.1 Fan Body
•Fan Scroll including Motor and Removable Impeller
•Control / PSU PCB, complete with Boost Pull Switch
•PCB Cover
•Front Grille
•Front Cover
•100mm Spigot (fitted)
•Additional 125mm Ø Spigot
•2x 100mm Back Draught Spigot
•2x 125mm Back Draught Spigot
•24V Transformer Enclosure
•15mm deep mounting skirt
2.4.2 Fixing Kit
•8x No6 x 3⁄4" Pozi Pan Screw
•6x No6 x 1⁄2" Pozi Pan Screws
•2x No8 x 3⁄8" Pozi Pan Screws
•3x Cable Clamps
•1x Shutter Spring
2.5 Dimensions (mm)
2.5.1 CYFAN
208
207
179
137
124 dia.
99 dia.
201
Back view
Side view
Top view
Front view
1 CYFAN Dimensions

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
4 Spigot Change Screw Locations
3.2 Backdraught Shutter Installation
The CYFAN kit comes complete with back draught shutters for
100mm and 125mm spigots however these are not fitted as standard
and should not be used when using your CYFAN in continuous
operation.
It is also recommended that you should not fit back draught shutters if
your intermittent operation duties are below 15 l/s and for installations
other than directly through the wall application to avoid failure of the
shutters opening.
Please follow these simple steps to fit your back draught shutters if
required: It is advised to fit the shutters before installing the fan
unit.
•Collect all required parts
•125mm shutters (2 of 41285) or 100mm shutters (2 of 41286)
•Spring (Part of Fixing Kit 770173)
Fit 1 of the required diameter shutters with the part number facing in,
by placing the bottom pin into the bottom hole, slightly deflect the
shutter and then fit the top pin into the top hole. Repeat this process
for the other shutter.
5 Backdraught Shutter Spring Installation
Spring.
2.5.2 Window Kit (Optional)
2 Window Kit Dimensions
48.0
Window thickness
971 x 202
150.0
802 x 702
3.0 INSTALLATION PREPARATION
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.
Fan Cover Fan Grille Fan Scroll Fan Casing
Impeller
3 Unit Exploded View
3.1 Spigot Change
For kitchen installations it is recommended that the 125mm diameter
spigot is fitted.
•Remove the front cover and grille.
•Remove fan scroll from fan casing (Do not disconnect wiring).
•Using a PH2 screw head driver remove 4 of No.8 x 1/4" screws.
•Remove spigot.
•Place the required spigot into position (Figure 4).
•Replace 4x No8 1⁄4" screws.
•Replace fan scroll on fan casing.
•Replace front cover and grille.

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
3.3 Conversion from 230V to 24V
•Unpack the fan unit, components and transformer. Ensure that
all parts listed on page 1 are present. If not please contact the
manufacturer for replacement / missing parts.
•Place the front cover and inlet grille to one side.
•Remove the PCB cover by removing 2 off No.6 x 1/2" screws.
•Partially remove the PCB assembly from the fan casing by placing
a fingertip behind the dip switches and pulling the PCB away from
the fan casing (Figure 6).
•Separate section 2 of the PCB from section 1 by cutting the tabs in
the positions shown (Figure 7). Replace section 2 of the PCB into
the fan unit.
6 PCB Cover Removal
PCB coverPCB assembly
7 Separated PCB Sections
Motor
connection
Section 2 (Control PCB 24V DC)
24V SELV
output
24V SELV
input
Connection
to pull-cord
SL N L
Transformer
SL
0
24v
24V
0
SL
Mains supply
terminal block
Section 1
(Power supply
230V to 24V)
3.4 Transformer Enclosure (24 Volt units only)
24V fan units must be installed in accordance with these
instructions and IEE Wiring Regulations BS7671 for SELV
installations.
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.
8 24V PCB Section Installed In Transformer Enclosure Following
24V Wiring Completion
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
3.4.1 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 arm’s reach is defined as 0.6 metres from the edge of the bath or
shower up to a height of 2.25 metres.
•Installing the Transformer
•Remove the transformer cover.
•Position the transformer base enclosure on mounting surface and
route cables through knock outs. Mark the fixing points on the
mounting surface. Secure using suitable fixings (by others).
•Before fitting section 1 of the PCB into the transformer enclosure
connect wiring as shown in section "5.3.5 Window Kit Installation
Procedure" on page 8. Fit section 1 of the PCB by first slotting
the bottom edge (Figure 9) into the fixing clip inside the base
of the transformer enclosure then press on the transformer
and terminal block until the PCB clicks into place. Complete by
replacing the transformer cover using the screws provided. Keep
vents clear of obstruction.
•Complete the installation of components by securing the
PCB cover on the fan. No earth is to be connected between
transformer and fan.
9 Installing Section 2 of PCB into Transformer Enclosure
Place section 1 of PCB
into the transfomer enclosure
Top fixing clip
Slot for small flat screwdriver to come from
underneath the transformer to push clip to one side

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
3.4.2 Wire Sizes for Transformer Installation
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 adhered to.
To avoid cable insulation contact with hot transformer, always use
the knock out at PCB end.
Cable Type Cable Size
Main Supply - 230V 0.5 mm sq
Transformer to Fan Cable Runs (max. 10 metres ) - 24V Units Only
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
4.0 ELECTRICAL INSTALLATION
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 commencing work, ensure the unit, switched live and any
controls are electrically isolated from the electric supply.
4.1 Wiring Diagrams - 24V
4.1.1 Wiring - 24V SELV Via Remote Switch
10 Wiring - 24V SELV Via Remote Switch
24V
0
SL
N
L
(BS 1362)
Fuse 2A
Mains
230V
50Hz
3 Pole isolator
N
L
Fuse 2A
(BS 1362)
Mains
230V
50Hz
2 Pole isolator
SL
N
L
24V
0
SL
N
L
24V
0
Transformer
Box
24V
0
SL
LINK REQUIRED
Note: if not fitted fan will
run at full speed only
Fan unit
(Section 2 PCB)
Transformer
Box
Fan unit
(Section 2 PCB)
2 Pole switch
4.1.2 Wiring - 24V SELV Via Pull Cord
11 Wiring - 24V SELV Via Pull Cord
24V
0
SL
N
L
(BS 1362)
Fuse 2A
Mains
230V
50Hz
3 Pole isolator
N
L
Fuse 2A
(BS 1362)
Mains
230V
50Hz
2 Pole isolator
SL
N
L
24V
0
SL
N
L
24V
0
Transformer
Box
24V
0
SL
LINK REQUIRED
Note: if not fitted fan will
run at full speed only
Fan unit
(Section 2 PCB)
Transformer
Box
Fan unit
(Section 2 PCB)
2 Pole switch
4.2 Wiring Diagrams - 230V
4.2.1 Wiring - 230V Via Remote Switch
12 Wiring - 230V Via Remote Switch
SL
N
L
Optional lamp
N
L
Mains
230V
50Hz
Fan unit
N
L
Mains
230V
50Hz
Fan unit
N
L
2 Pole isolator
3 Pole isolator
Fuse 2A
(BS 1362)
Fuse 2A
(BS 1362)
2 Pole switch
4.2.2 Wiring - 230V Via Pull Cord
13 Wiring - 230V Via Pull Cord
SL
N
L
Optional lamp
N
L
Mains
230V
50Hz
Fan unit
N
L
Mains
230V
50Hz
Fan unit
N
L
2 Pole isolator
3 Pole isolator
Fuse 2A
(BS 1362)
Fuse 2A
(BS 1362)
2 Pole switch
4.3 Wiring Diagrams - 230V Two Rooms Via Side Spigot
4.3.1 Wiring - 230V Two Rooms Via Remote Switches
14 Wiring - 230V Two Rooms Via Remote Switches
Fuse 2A
(BS 1362)
N
L
Mains
230V
50Hz
Fan unit
N
L
N
L
Mains
230V
50Hz
Fan unit
SL
N
L
2 Pole isolator
3 Pole isolator
Fuse 2A
(BS 1362)
2 Pole
switch
2 Pole
switch
4.3.2 Wiring - 230V Two Rooms Via Pull Cords
15 Wiring - 230V Two Rooms Via Pull Cords
Fuse 2A
(BS 1362)
N
L
Mains
230V
50Hz
Fan unit
N
L
N
L
Mains
230V
50Hz
Fan unit
SL
N
L
2 Pole isolator
3 Pole isolator
Fuse 2A
(BS 1362)
2 Pole
switch
2 Pole
switch

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
5.0 MECHANICAL INSTALLATION
5.1 Surface Mounted Installation
5.1.1 Fan Installation
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.
5.1.2 Required Tools
•Drill
•PH2 Screwdriver
•Terminal Screwdriver
•Tape Measure
•100 / 125mm diameter core cutter
5.1.3 Surface Mounted Fan Installation Procedure
•Unpack the fan unit and other components, and ensure that all
parts listed in section "2.4 Box Contents" on page 2. If not
please contact the manufacturer for replacement / missing parts.
•Place the front cover and inlet grille to one side.
•Remove the PCB cover by removing 2 off No.6 x 1/2" screws.
•Partially remove the PCB assembly from the fan casing by placing
a fingertip behind the dip switches and pulling the PCB away from
the fan casing (Figure 17).
•Disconnect and remove the fan scroll from assembly and
completely remove the PCB assembly. If the pull cord is not
required, remove it completely.
•Using the template in section "10.0 DRILL PATTERN TEMPLATE" on
page 13, mark out the position of the spigot hole (depending on
spigot size chosen) and the four mounting holes.
•Core cut centre and drill and plug mounting holes.
•Choose one of the four cable entries on the fan skirt for the supply
wiring and carefully trim out or alternatively feed cable through
hole in wall.
•Secure skirt to wall (fixings supplied by others). Note: use wood
screws not countersink screws to avoid distorting the skirt.
•Feed cable through the back of the fan casing and wire cable
into the PCB terminal block (see section "4.0 ELECTRICAL
INSTALLATION" on page 5).
•Replace PCB into fan casing and secure cable into place using cable
clamps and screws provided in the CYFAN fixing kit.
•Secure unit to skirt using 4 off No.6 x 1/2" screws provided.
•Replace fan scroll assembly and plug motor into PCB, replace PCB
fully into position by pushing the dip switches.
•Replace PCB cover by fitting with 2 off No.6 x 1/2" screws.
•Fit front inlet grille using 4 off No.6 x 3/4" screws found in the
fixing kit.
•Remove rubber gasket and adjust control to required settings
shown in section "6.0 OPERATION" on page 12. Once required
settings are complete and desired airflow rate is achieved replace
rubber gasket.
•Complete the fan installation by fitting (push fit) the front cover.
16 Unit Surface Mounted On Cavity Wall
17 Removing PCB Cover
PCB coverPCB assembly
Unit fixing holes
Wall fixing
holes
Cable cut-outs
Wall fixing
holes
18 Unit Installation Using Fan Mounting Skirt

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
5.2 Surface Mounted Installation
5.2.1 Fan Installation
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.
5.2.2 Required Tools
•Drill
•PH2 Screwdriver
•Terminal Screwdriver
•Tape Measure
•100 / 125mm diameter core cutter
19 Removing PCB Cover
PCB coverPCB assembly
20 Semi-Recessed Ceiling Mounted Unit
Plate.
A A A A
Ceiling Mounting
Ceiling
5.2.3 Semi-Recessed Fan Installation Procedure
•Unpack the fan unit and other components, and ensure that all
parts listed in section "2.4 Box Contents" on page 2. If not
please contact the manufacturer for replacement / missing parts.
•Place the front cover and inlet grille to one side.
•Remove the PCB cover by removing 2 off No.6 x 1/2" screws.
•Partially remove the PCB assembly from the fan casing by placing
a fingertip behind the dip switches and pulling the PCB away from
the fan casing (Figure 20).
•Disconnect and remove the fan scroll from assembly and
completely remove the PCB assembly. If the pull cord is not
required, remove it completely.
•Using the template on page 13, mark out the position of the spigot
hole (depending on spigot size chosen) and the four mounting
holes.
•For 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. Remove the
shutters from the spigot if you are mounting CYFAN in the
ceiling. Pull-cord must be removed.
•Core cut centre and drill and plug mounting holes.
•Choose one of the four cable entries on the fan skirt for the supply
wiring and carefully trim out or alternatively feed cable through
hole in wall.
•Secure skirt to wall (fixings supplied by others). Note: use wood
screws not countersink screws to avoid distorting the skirt.
•Feed cable through the back of the fan casing and wire cable
into the PCB terminal block (see section "4.0 ELECTRICAL
INSTALLATION" on page 5).
•Replace PCB into fan casing and secure cable into place using cable
clamps and screws provided in the CYFAN fixing kit.
•Secure unit to skirt using 4 off No.6 x 1/2" screws provided.
•Replace fan scroll assembly and plug motor into PCB, replace PCB
fully into position by pushing the dip switches.
•Replace PCB cover by fitting with 2 off No.6 x 1/2" screws.
•Fit front inlet grille using 4 off No.6 x 3/4" screws found in the
fixing kit.
•Remove rubber gasket and adjust control to required settings (see
section "6.0 OPERATION" on page 12). Once required settings
are complete and desired airflow rate is achieved replace rubber
gasket.
•Complete the fan installation by fitting (push fit) the front cover.
Push fit fan
cover to fan
grille
Fit fan grille to inner
fan case using 4 fixing
screws (No 6 x 3/4”)
Foam strip
Fix fan skirt to inner fan
case using 4 of fixing
screws (No 4 x 3/8”)
Ensure plate edge is
flush with the surface
of the wall for a flush fit
Fan cover Fan grille
Semi-recessed
mounting flange
Sealing
plate
Fan
motor
Blower
release tab
Inner
fan case
Mounting plate to be placed
within previously prepaired
aperture/opening
(205mm x 185mm) fix into
place using appropriate fixings
(supplied by others).
Use 4 of M4 x 16
screws to secure
inner fan case to the
mounting plate
21 Semi-Recess Mounting Kit Suitable For 100mm And 125mm Diameter Duct

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
5.3 Window Mounted Installation
5.3.1 Fan Installation
Window mounting requires the optional mounting kit,
Part number: CYFAN-WKIT.
Installation must be completed by qualified personnel.
5.3.2 Required Tools
•Drill
•PH2 Screwdriver
•Terminal Screwdriver
•Tape Measure
5.3.3 Window Fan Installation Procedure
•Unpack the fan unit and window kit components, and ensure that
all parts listed are present (see sections "2.4 Box Contents" on
page 2 & "5.3.4 Window Kit Contents" on page 8). If not
please contact the manufacturer for replacement / missing parts.
•Place the front cover and inlet grille to one side.
•Remove the PCB cover by removing 2 off No.6 x 1/2" screws.
•Partially remove the PCB assembly from the fan casing by placing
a fingertip behind the dip switches and pulling the PCB away from
the fan casing (see "22" on page 8).
•Disconnect and remove the fan scroll from assembly and
completely remove the PCB assembly. Note: if the pull cord is not
required, remove it completely.
•Feed wiring flex through the back of the fan casing and secure into
place using cable clamps and screws provided in the CYFAN fixing
kit.
•Secure the case to the window kit. Note: care must be taken not to
twist or distort the case whilst fitting.
•Partially replace PCB into the fan casing and wire flex into the
terminal block.
•Replace fan scroll assembly and plug motor into PCB, replace PCB
fully into position by pushing the dip switches.
•Replace PCB cover by fitting with 2 off No.6 x 1/2" screws.
•Fit front inlet grille using 4 off No.6 x 3/4" screws found in the
fixing kit.
•Remove rubber gasket and adjust control to required settings (see
section "6.0 OPERATION" on page 12). Once required settings
are complete and desired airflow rate is achieved replace rubber
gasket.
•Complete the fan installation by fitting (push fit) the front cover.
22 Removing PCB Cover PCB coverPCB assembly
23 Rear Cable Clamp
5.3.4 Window Kit Contents
CYFAN-WKIT Checklist
Quantity Description Part No.
1 off Window Cover 041351
1 off Outside Clamp 041350
1 off Inner Clamp 041349
2 off Back-draught Shutter 041286
1 off Screw Kit Containing Shutter Spring 772285
Screw-Kit (772285) Checklist
Quantity Description Part No.
2 off No.8 x 1” CSK HD Supascrew 691646
4 off No.8 x 1-1/2” CSK HD Supascrew 680193
4 off No.8 x 1-3/4” CSK HD Supascrew 691647
2 off No.8 x 2-1/4” CSK HD Supascrew 691648
3 off No.8 x ¾” Panhead Pozi
(Main Case to Inner Clamp)
180394
1 off Spring 580069
5.3.5 Window Kit Installation Procedure
The window kit is designed for mounting the unit into windows 4mm to
32mm thick using a 125mm diameter hole in the glass (Figure 24).
•Employ a qualified glazier to cut a hole 125mm diameter in
the glass or, alternatively, replace your window with new glass
incorporating a pre-cut hole.
•The outer assembly consists of a cover complete with clamping
plate and an ‘O’ ring seal. The clamping plate incorporates a
moulded spigot which is designed to locate inside the 125mm
diameter hole in the glass.
•Back draught Shutters (Figures 5 & 25) are clipped into Inner
clamp and the spring is fitted in the lower position).
•Position the assembly on the outside of the glass. If only one
person is installing the fan it may be helpful to tape the assembly
to the outside glass at this stage during installation as all fixings
and assembly are completed from inside.
•Working from inside the room with the clamp. Position this inner
clamp over the hole in the glass and line up the 4 mounting holes.

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18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
•Select appropriate screws from the screws kit supplied for
mounting into different thickness’s of glass, see section "5.3.6
Window Mounting Screws". Should the screws foul on the back of
the grille during installation, replace with the next size down. There
are 2 long and 2 short screws for each thickness of glass with the
shorter screws located at the top.
•Using four screws locate the screw bosses in the outer assembly
and draw the inner and outer assemblies together. Remove any
tape supporting the outer assembly and continue to draw the units
together until the ‘O’ ring is compressed on the window. Do not
over tighten the fixing screws as this may distort the assembly.
•Wire unit in accordance with the appropriate wiring diagram.
A cable clamp is provided inside the case. The remaining
installation procedures for Window Mounting are as the
description in section "5.3.3 Window Fan Installation
Procedure".
5.3.6 Window Mounting Screws
Window Thickness Quantity Screw Size
4 - 11 mm 2 off No.8 x 1” CSK HD Supascrew
2 off No.8 x 1-1/2” CSK HD Supascrew
12 - 21 mm 2 off No.8 x 1-1/2” CSK HD Supascrew
2 off No.8 x 1-3/4” CSK HD Supascrew
22 - 32 mm 2 off No.8 x 1-3/4” CSK HD Supascrew
2 off No.8 x 2-1/4” CSK HD Supascrew
125mm dia.
hole in glass
24 Hole Cut In Glass For Window Installation
25 Hole Cut In Glass For Window Installation
Backdraught
Shutter x 2
Spring
Inner Clamp
Backdraught shutter x 2
Window cover and
outside clamp assembly
Window 4mm to 32mm thick glass
cut 125mm dia. hole for fan
Window Inside Clamp
Spring
Fan Skirt and
Body Assembly
Window Screw
180394 Pan Head Screws x 4
short x 2
Cable entry
Window screw long x 2
26 Window Mounted (4 - 32 mm Thick) Using Optional Window Mounting Kit With 125 mm Diameter Hole In The Glass

10
18. 02. 21. Document Number 671886
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
CYFANInstallation Manual
5.4 Surface Mounted With Side Spigot Installation
CYFAN-DKIT is recommended for Intermittent Extract Only.
5.4.1 Fan Installation
Surface mounting with side spigot requires the optional mounting
kit, part number: CYFAN-DKIT.
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.
Fan with spigot kit.
Inlet Grille, supplied
with CYFAN-DKIT.
3M length of duct supplied with CYFAN-DKIT
(Alternatively standard 50mm waste pipe can be used).
27 Typical Installation Example Of Fan Unit With Ancillary Spigot Kit
In Bathroom And Adjacent Toilet
5.4.2 Required Tools
•Drill
•PH2 Screwdriver
•Terminal Screwdriver
•Tape Measure
5.4.3 Spigot Kit Contents
•Replacement Outer Fan Skirt with 50mm diameter hole in one side
•Replacement Fan Body with 55mm diameter hole in each side
•50mm diameter Spigot
•3M of 50mm Duct
•Inlet Grille with Filter
•Reduction Filter
5.4.4 Installation Procedure
•Unpack the fan unit and components, and the subsidiary spigot
kit. Ensure that all parts are present. If not please contact the
manufacturer for replacement / missing parts.
•Place the front cover to one side.
•Place the reduction filter over the grille. Secure the filter by
pressing the filter under the lugs located around the grille (Figure
29).
•Remove the PCB cover by removing 2 off No.6 x 1/2" screws.
•Partially remove the PCB assembly from the fan casing by placing
a fingertip behind the dip switches and pulling the PCB away from
the fan casing (Figure 30).
•Disconnect and remove the fan scroll from assembly and
completely remove the PCB assembly. if the pull cord is not
required, remove it completely.
•If using surface mounted wiring the 15mm fan skirt must be used,
see point 13 onwards.
•Core cut a hole through mounting surface at desired mounting
position to suit the size of the discharge spigot required, 100mm or
125mm diameter.
•Place the fan casing in the mounting position (spigot placed
into core cut hole) and use the base as a template to mark the
mounting screw hole positions (x4). Remove casing once marks
are made.
•Drill and plug (if necessary) the mounting surface.
•Feed wiring flex through the back of the fan casing and secure into
place using cable clamps and screws provided in the CYFAN fixing
kit.
•Secure the case to the surface (fixings supplied by others). Care
must be taken not to twist or distort the case whilst fitting.
•Partially replace PCB into the new fan casing and wire flex into the
terminal block (see section "4.0 ELECTRICAL INSTALLATION" on
page 5).
•Whilst utilising the fan skirt, use the template in section "10.0
DRILL PATTERN TEMPLATE" on page 13 to mark out the position
of the spigot hole (depending on spigot size chosen) and the four
mounting holes.
•Core cut centre and drill and plug mounting holes.
•Choose one of the four cable entries and carefully trim out.
•Secure skirt to wall (fixings supplied by others). Use wood screws
not countersink screws to avoid distorting the skirt.
•Feed cable through skirt and offer up fan case to skirt. Feed cable
through unit and secure unit to skirt using 4x No.6 x 1/2" screws
provided.
•Replace fan scroll assembly and plug motor into PCB, replace PCB
fully into position by pushing the dip switches.
•Replace PCB cover by fitting with 2 off No.6 x 1/2" screws.
•Fit front inlet grille with reduction filter fitted using 4 off No.6 x
3/4" screws found in the fixing kit.
•Remove rubber gasket and adjust control to required settings (see
section "6.0 OPERATION" on page 12). Once required settings
are complete and desired airflow rate is achieved replace rubber
gasket.
•Complete the fan installation by fitting (push fit) the front cover.