Zehnder Rittling Unity ZCV3si User manual

Zehnder Unity ZCV3si
Installation and Operating Instructions
The Unity ZCV3si 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 ZCV3si 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.
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,
e.g. at least 600mm distance from cooker hob.
•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.
Your Unity ZCV3si may have the following features activated:
* Intelligent sensing via the Smart Timer and Humidity technology (fully automatic integral delay / over-run timer and
humidity functions) which monitor the homeowners’ environment.
* Delay-on-timer, set between 1-60 minute period.
* A 'do not disturb' night mode where your fan will not boost for a period of time upon activation of the
light switch.
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 - 9 User Information pages 10 - 11

Ø = 105mm
Installation Preparation
3
Installation Preparation
Electrical installation must only be carried out
by a qualified Electrician and in accordance
with local regulations.
The Unity ZCV3si fan is supplied with a
100mm nominal spigot for connection of
ducts for installation - 100mm diameter rigid
duct 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 102mm - 117mm
(to uit ducting dimen ion )
Allow a clearance of 50mm from
wall/ceiling edge around the fan.
Ceiling Preparation
Cut an
opening
through the
ceiling for
the fan and
electrical
cable.
X = 65 Ø = 105mm
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.
ZCV3 i Cover Ø197mm

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 ZCV3si
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 pages 7 & 8
STEP 4

Commissioning
7
Commissioning your Unity ZCV3si … via the fan
Upon first power up, your Unity ZCV3si will commence a diagnostic check, whereby the capacitive touch
buttons will flash. You should hear a range of beeps, 1 long beep followed by between 2-4 short beeps
(depending on how the unit has been configured).
Following diagnostic completion, the
‘Kitchen and Bathroom’ buttons will
start to flash. Select required flow
rate, the light adjacent to your
selection will go solid.
Boost Airflow button will flash, press
the speed adjustment buttons ‘+/-‘
to required level, repress button to
confirm.
Trickle Airflow button will flash, press
the speed adjustment buttons ‘+/-‘
to required level, repress button to
confirm.
Select required settings for smart timer and humidity and refit the ‘outer cover’ onto fan (see Step 5 on page 6).
Default setting: Off
To activate, press required button the light adjacent to
your selection will go solid.
The Smart Humidity sensor automatically registers the speed at which the humidity in the room changes. If there
is a rapid change it reacts to a rise in room humidity caused by the user and switches on the ventilator.
The Smart Timer 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):
Note: the first 5 minutes will not activate an over-run.
Kitchen
Smart Timer icon Smart Humidity icon
Room Basic ventilation Boost ventilation
Small bathroom 18 m3/h 29 m3/h
Kitchen / large bathroom 29 m3/h 47 m3/h
Bathroom Plus
Trickle
Boost Minus
Time ‘Switch Live’ is Active
0 – 5 minutes
5 – 10 minutes
10 – 15 minutes
15+ minutes
Over-run Boost Period
No over-run
5 minutes
10 minutes
15 minutes
Factory Settings

Commissioning
8
NFC Location for
use with APP only
Commissioning your Unity ZCV3si … via the APP
Download our ‘Unity CV3 APP’ onto your android device via the link available
from Google Play.
Note: Your device must be NFC capable with NFC enabled (some devices may not work whilst in a case).
Minimum Android operating requirements for functionality via the APP is OS 4.3.
Upon first power up, your Unity ZCV3si will commence a diagnostic check, whereby the capacitive touch
buttons will flash. You should hear a range of beeps, 1 long beep followed by between 2-4 short beeps
(depending on how the unit has been configured).
Following diagnostic completion, the ‘Boost’ button and 3
higher speeds will start to flash.
Note: Do not press any buttons.
Open the ‘Unity CV3 APP’, remove ‘outer cover’ of your fan
and when prompted match your Android device’s NFC with
the NFC symbol on the ‘main body’ of the fan (please refer
to your Android device instructions for the NFC location).
Click on the 'Product Setup' section and follow the APP on
screen instructions.
Airflow
18 m3/h
29 m3/h
36 m3/h
47 m3/h
58 m3/h
See matrix below for motor speed % setup:
Upon completion, press 'save' and place the NFC symbol on your phone on the NFC symbol on the main body
of the fan.
Upon confirmation of required set up via the APP, your Unity ZCV3si will start to go through its initialisation
sequences for the respective flow rate commissioning. Refit the ‘outer cover’ onto your fan (see Step 5 on
page 6).
Results based on a ‘through wall’ installation
Without Grille
31%
41%
48%
61%
74%
With Grille / Flymesh
32%
43%
52%
65%
78%

Commissioning
9
Resetting your Unity ZCV3si 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 r ecommission either via your fan or the APP,
refer to respective commissioning section (for via the fan see page 7 or for via the
APP see page 8).
The Unity ZCV3si will start to go through its initialisation sequences for the
flow rate commissioning. See page 7 for fan status.
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 ZCV3si
Retaining screw
Unlock position Lock position

User Information
10
Servicing / Maintenance
Service / Maintenance must be carried out by a trained / competent person.
The Unity ZCV3si 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.
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
Press button on fan
• If the 'trickle or boost' symbols with a flow rate lights up,
your fan has been commissioned locally. You can change
the following settings:
• Touch Smart Timer button for on or off
• Touch Smart Humidity button for on or off
If only the 'trickle or boost' symbols & no airflow speeds light
up, your fan has been commissioned via our APP. To review /
change your settings, download our ‘Unity CV3 APP’ from
Google Play. You can view your settings by removing the front
cover and placing your android device over the NFC symbol.
Follow APP to read settings on your device for:
• If fan setup has been locked you cannot change anything
• If unlocked you will be able to adjust:
• Smart Humidity on / off
• Selected timer mode:
o Smart Timer on / off
o Silent mode delay-on-timer, 1-60 minute range
• Night mode setting to deactivate the boost mode during
your selected time period
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 Smart Humidity 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 Smart Timer 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 Deutschland GmbH • Sales International • Almweg 34 • 77933 Lahr • Germany
T [phone]
[e-mail] • www.international.zehnder-systems.com 05.10.1067 – December 2019
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 Sales International Standard Conditions of Sale which are
available on request. See website for warranty period details.
Zehnder Group Sales International reserves the right to change specifications and prices without prior notice.
© Copyright Zehnder Group UK Ltd 2019.