Unity CV2.1 User manual

Unity CV2.1
Installation and Operating Instructions
The Unity CV2.1 is a continuously
running extract fan, designed to offer a
simplistic approach to meet Building
Regulations and provide an energy
efficient domestic ventilation solution to
improve indoor air quality in dwellings.
Please read instructions before
commencing the installation.
Please make these instructions
available for the user.

Overview
2
The Unity CV2.1 is a continuously running fan that revolves around ‘one
product’, which has been designed to be flexible in application and to
meet the performance requirements of all ‘wet’ rooms within a dwelling.
This product features on the PCDB, part of the process will require the
Installation and Commissioning Checklist for dMEV products to be
completed, see page 7 for details.
Important:
Please read these instructions before commencing the installation
•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. Children shall not play with the appliance.
•Cleaning and user maintenance shall not be made by children without supervision. Ensure
the fan is switched off from the mains supply before cleaning commences.
•Where an open-flued oil or gas-fuelled appliance is installed, precautions must be taken to
avoid a back-flow of gases into the room.
•When installing wall mounted fans, ensure that there are no buried cables or pipes in the way.
It is recommended that this fan is mounted >1.8m above floor level and within 400mm of the
finished ceiling.
•The fan should not be sited where it would be subject to a direct heat source in excess of 40°C.
•Observe appropriate safety precautions if working on steps or ladders.
•Wear eye protection when breaking out wall or ceiling materials, etc.
•To disassemble the unit, disconnect from mains supply and use a screwdriver to segregate the
electronic components and motor from the plastic housing. Dispose items in accordance with WEEE.
WEEE Statement
This product may not be treated as household waste. Instead it should be handed to an appropriate
collection point for the recycling of electrical and electronic equipment. For more detailed information
about the recycling of this product, please contact your local council office or your household waste
disposal service.
The Unity CV2.1 features Greenwood TimerSMARTTM and Greenwood HumidiSMARTTM technology (fully automatic
integral delay / overrun timer and humidity functions) which monitor the homeowners' environment.
The boost speed facility is provided to increase the ventilation rate during peak times, helping to provide a
comfortable indoor environment. Either a 'switch-live' light switch or an alternative boost switch (not supplied)
should be wired to provide this operation.
Note: These functions only affect the higher extract boost mode, your fan will continue to ventilate at the
lower trickle mode.
Key: Installer Information pages 2 - 8 User Information pages 9 - 11

Ø = 105
Installation Preparation
3
Installation Preparation
Electrical installation must only be carried out
by a qualified Electrician and in accordance
with local regulations.
The Unity CV2.1 fan is supplied with a
100mm nominal spigot for connection of
ducts for installation - 100mm diameter rigid
or 110mm semi-rigid ducting should be used
to provide the best performance levels
required for compliance with Building
Regulations.
Wall Preparation
Preparing your fan for installation
Upon removal from packaging, rotate ‘outer cover’
anticlockwise until retaining clips are released and
place the cover to one side.
Loosen retaining screw in main body cover and
rotate anticlockwise to remove.
Main body
Outer cover
Cut the duct to depth of the
plasterboard or tiled wall
with slight fall to exterior
(Make provisions for cable).
Fill in any gaps with mortar
or foam and make good
internal and external walls.
Make sure that ducting
retains its original shape.
Ø = between 102 - 117
(to suit ducting di ensions)
Allow a clearance of 50 fro
wall/ceiling edges around the fan.
Ceiling Preparation
Cut an
opening
through the
ceiling for
the fan and
electrical
cable.
X = 65 Ø = 105
Ø
X
Retaining
screw
CV3 Cover Ø 197mm
126mm
Ø 99mm
48mm
68mm
Ø 178mm
58mm
The unit can be installed on a wall, window (with separate adaptor kit) or ceiling mounted and ducted.
Window Preparation
Cut circular hole
within window pane.
• minimum Ø = 118mm
• maximum Ø = 130mm
See instructions
with window kit for
installation details.
CV2.1 Cover Ø197

Installation
4
Installation
Loosen retaining screw until
you can rotate main body
cover of the fan anticlockwise
to ‘unlock position’ and
remove cover
Connect ducting to the spigot on
the back of the Unity CV2.1
Note: If using flexible ducting,
ensure this is pulled taut (to a
min. 90% stretch capacity)
between fan and termination
Retaining screw
STEP 1
STEP 2
Lock position Unlock position

Installation
Wire the fan
STEP 3
Secure using outer 4 fixing points
on a smooth flat surface, using
No. 8 screws provided
Secure via cable clamp
Note: This part must be fitted to
comply with safety standards
Unity 230V Wiring Details
IPX5 Wall, IPX4 Ceiling, 220-240V ~ 50Hz / 1Ph, 7 Watts max.
Cable size: Fixed flat wiring 2 core 1mm2, 3 core 1/1.5mm2
Strip cable to correct lengths and insert cable through cable entry point at the back of the fan.
Tighten cable clamp and push wires into the terminal block as per wiring diagram, tighten
screws of the terminal block.
Note: A facility to park the earth cable has been provided; as the fan is double insulated no
connection to earth is required.
Electrical Installation Preparation
Installation or disconnection must be carried out by a qualified Electrician and all wiring must conform to local
regulations. Isolate electricity supply before starting work.
A triple-pole switch having a minimum contact separation of 3mm must be used to provide isolation for the
unit. When supplied from a 6 amp lighting circuit no local fuse is required. If electricity is not supplied via the
lighting circuit, a localised 3 amp fuse must be used.
5

Installation
6
A 100mm nominal diameter spigot is provided for connection to ducting. Ductwork should be securely
connected to the back of the fan. Failure to do this will cause unnecessary air leakage and may impair
performance.
Reattach the front cover by
rotating clockwise, utilising
the guidance rail, until firmly
secured by the retaining clips
STEP 5
Retaining screw
Unlock position Lock position
Turn power off and locate main body cover via the arrow & unlock
position, rotate clockwise to ‘lock position’
Tighten retaining screw until main body cover cannot be opened.
Turn power on and follow respective commissioning on page 8
STEP 4

Commissioning
7
Note: Selection lights should remain on for approximately 10 seconds to enable the setup and status of the fan
to be observed and checked, upon which time the selected commissioning settings should lock out.
Commissioning your Unity CV2.1
Upon first power up, your Unity CV2.1 will commence a diagnostic check, whereby the capacitive touch buttons
will flash. You should hear a range of beeps, 1 long beep followed by 3 short beeps. Following diagnostic
completion, the 'Kitchen and Bathroom' buttons will start to flash, follow the steps for commissioning airflow.
Installation Checklist & Inspection Record
This product features on the PCDB, part of the process will
require the Installation and Commissioning Checklist for dMEV
products to be completed and submitted to building control and
incorporated into the homeowner pack.
This documentation is available at
https://www.greenwood.co.uk/part-f
or via the QR codes in this section.
Step 2
Press Bathroo or Kitchen button
- light will go solid
Boost Airflow button will flash
– factory setting:
Press speed adjust ent buttons to
required level and verify
- re-press Boost button to confir
Trickle Airflow button will flash
– factory setting:
Press speed adjust ent buttons to
required level and verify
- re-press Trickle button to confir
Step 1
Step 3
For Hu idiSMART press button to
turn on
- light will go solid
For Ti erSMART press button to
turn on
- light will go solid
Step 5
Step 4
Bathroo 8 l/s Kitchen 13 l/s
Bathroo 6 l/s Kitchen 8 l/s

Commissioning
8
Resetting your Unity CV2.1 must be carried out by a qualified electrician or
competent person.
Whist the fan is running, remove both the outer cover and main body cover of the
fan (see installation section page 4).
Locate the ‘reset’ button and depress using a small ‘pin-sized’ tool for 3 seconds.
All lights will turn on to show the unit has been reset.
Turn the power OFF to the fan refit the main body cover.
Locate main body cover via the arrow & unlock position, rotate clockwise to
'lock position'.
Tighten retaining screw until main body cover cannot be opened.
Turn the power to the fan ON recommission (see page 7).
Note: Your fan will remember its previous timer and humidity settings, if required,
these can be changed during the recommissioning section.
To master reset and recommission your Unity CV2.1
Airflow Settings
l/s
Trickle
Boost
Bathroom
(Default)
6
8
Kitchen
(Default)
8
13
Performance Graph - airflow characteristics

User Information
9
Time ‘Switch Live’ is Active
0–5minutes
5–10 minutes
10 – 15 minutes
15+ minutes
Over-run Boost Period
No over-run
5 minutes
10 minutes
15 minutes Note: the first 5 minutes will
not activate an over-run.
Greenwood HumidiSMARTTM monitors the ambient humidity within the wet room environment and looks for
short peaks of humidity made by either showering or bathing. This smart technology ensures that your
Unity CV2.1 is not on boost for prolonged periods of time, removing nuisance running noise and unnecessary
energy wastage typically associated with increases to background humidity which naturally occurs with the
changing seasons.
To View Fan Set Up / Status
To Change the TimerSMART / HumidiSMART Settings
To identify current fan status, press any button to activate the panel. Upon identification of controls status,
either press:
to activate or deactivate the TimerSMART
to activate or deactivate the HumidiSMART
Please note the light should come on to indicate that the function is active.
Note: After approximately 10 seconds of inactivity, the LED lights should turn off and save selection settings.
Note: Both features are factory set to 'off', both can be activated at the same time.
Press any button to activate the panel. The current fan
set up / status will be shown via the red LED lights.
Example shows:
•Bathroom setting selected
•Boost mode activated
•HumidiSMART feature selected
Note: The Unity CV2.1 is commissioned during
installation to provide the correct airflow requirements
for your dwelling. Post adjustment of the room setting
or airflow speeds is not available.
Greenwood TimerSMARTTM monitors the length of time that there is an occupancy presence within a wet room
(via the ‘switch-live’) and provides a fixed over-run time period to best match the length of time that the ‘switch
live’ is active (as shown below):
SMART Technology
To maintain a healthy indoor environment the Unity CV2.1 includes SMART technology for Over-run Timer
(Greenwood TimerSMARTTM) and Humidity (Greenwood HumidiSMARTTM).

User Information
10
Servicing / Maintenance
Service / Maintenance must be carried out by a trained / competent person.
The Unity CV2.1 fan contains a unique backward curved mixed flow impellor that has been designed to reduce
build-up of dirt. The fan motor has sealed for life bearings, which do not require lubrication.
Periodic cleaning of the fans front cover and casing can be carried out using a soft damp cloth.
Always isolate fan from mains supply before cleaning.
Do not use solvents to clean this fan.
Cleaning and user maintenance shall not be made by children without supervision.
Please note that your stored fan settings will not be lost during any interruptions to your fan’s power supply.

User Information
11
How do I change my fan’s settings
To identify current fan status, press any button on the fan to
activate the LED lights. Upon identification of control status, press
the required icon to change the settings (note, the light should
come on to indicate that the function is active):
Touch TimerSMART button for on or off
Touch HumidiSMART button for on or off
After approximately 10 seconds of inactivity the LED light should
turn off and save selection settings.
Note: Both features can be activated at the same time.
Troubleshooting
I don’t think that my fan is working
My fan is running all the time
My fan is running faster and noisier
My fan still runs faster and noisier
when I turn the light off
Why can’t I turn the fan off
Answer
The fan is very quiet when the room’s light is off, but it is still
extracting and working to provide you with enhanced comfort
If in doubt, remove the front cover to expose the fan. If
the fan impellor is not rotating then contact your local
installer.
This is correct; it will run at a low speed whilst your room is
unoccupied to provide continuous ventilation
Your fan will automatically go into “boost” mode when you turn
the light on or if the HumidiSMART is activated, when you have a
bath / shower / generate steam via cooking
The fan will run at a faster speed which generates more noise as
more air is being extracted
Has the bathroom light been left on for more than 5 minutes?
If yes, your fan has the TimerSMART activated and the fan will
run at the higher noisier “boost” rate between 5 - 15 minutes and
it will then return to the lower quieter continuous speed setting
Your fan has been designed to ventilate the room continuously (i.e.
24/7) to improve the indoor air quality and enhance your comfort
Question

Zehnder Group UK Limited
Watchmoor Point, Camberley,
Surrey, GU15 3AD
Customer Services: [phone]
Technical Services: [phone]
Email: [email protected]
Web: www.greenwood.co.uk 40025869 – June 2022
All information is believed correct at time of going to press. All dimensions referred to are in millimetres unless
otherwise shown. E&OE.
All goods are sold according to Zehnder Group International Sales Standard Conditions of Sale which are
available on request. See website for warranty period details.
Zehnder Group International Sales reserves the right to change specifications and prices without prior notice.
© Copyright Zehnder Group UK Ltd 2022.