Greenwood Unity CV2SVGIP User manual

Unity CV2GI / CV2SVGI
Decentralised Mechanical Extract Ventilation (dMEV)
Installation Instructions
Commissioning Data:
To be completed by the
Commissioning Engineer.
Refer to User / Homeowner Guide
also supplied.
Notice:
For Wall Mounting:
To ensure IPX5 install fan with
orientation arrows facing upwards.
(See section 2.3, figure 5)

2
Contents
Page
1.0 General Description / hysical Specification 3
2.0 Installation Instructions 5
2.1 General Preparation 5
2.2 Positioning / Application 5
2.3 Wall Mounting 6
2.4 Ceiling Mounting 7
2.5 Ducting Guidelines 8
2.6 Electrical 9
2.7 Wiring 10
2.8 SELV Box Installation 11
2.9 On Site Commissioning / Set Up 13
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.

3
Overview
Unity CV2GIP / CV2SVGIP is a continuously running (dMEV) 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.
The concept revolves around ‘one product’, which has been designed to
be flexible in application (ceiling and wall installations) and to meet the
performance requirements of all ‘wet’ rooms within a dwelling. The Unity
CV2GIP / CV2SVGIP features new Greenwood TimerSMARTTM and
Greenwood HumidiSMARTTM technology (fully automatic integral delay /
over-run timer and humidity functions) which monitor the homeowners’
environment. For enabling / disabling features see section 2.8 On Site
Commissioning.
A 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 (see section - 2.6 Electrical).
This product features on PCDB, part of the process will require the
Installation Checklist for dMEV products to be completed and submitted
to building control, available at www.ncm-pcdb.org.uk, along with all other
relevant paperwork.
Record sheets for commissioning information are provided; please refer to
section 4 of the User / Homeowner Guide also supplied with the product.
Packaging Includes –
Ancillary Items: 100mm round ducting or
Flat duct (110 x 54mm) or (204 x 60mm).
100mm grille & appropriate boost switch (GS2).
PFACV2 - Picture Frame Adaptor.
1.0 General Description / hysical Specification
1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
CV2GIP
1 x Unity dMEV Unit
1 x Loose item set
1 x Installation Instructions
1 x User / Homeowner Guide
CV2SVGIP
1 x Unity dMEV Unit
1 x SELV Box
1 x Loose item set
1 x Installation Instructions
1 x User / Homeowner Guide

4
1.1.7
1.1.8
1.1.9
1.1.10
1.1.11
1.1.12
1.2
Front Side
Ø 199 mm 129.5 mm
62 mm
Ø 99 mm
Ø 178 mm
68 mm
48 mm
Warning: 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.
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.
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 window materials, etc.
The CV2SVGIP fan must only be installed by using the supplied Safety
Extra Low Voltage (SELV) controller, corresponding to the markings on
the appliance.
hysical Specification

5
Figure 1: Back Plate Screw Fixtures
General reparation
The Unity CV2GIP / CV2SVGIP 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.
Technical Services can be contacted on [phone] should you
have any questions in respect of this.
Installation of the unit should be in accordance with the current
editions of Building Regulations and BS7671: IEE Wiring
Regulations.
Electrical installation must only be carried out by a qualified
Electrician.
ositioning / Application
The unit can be installed on a wall or ceiling mounted and ducted.
The unit must be securely mounted using all four fixing holes provided
(see Figure 1).
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.2
2.2.1
2.2.2
2.0 Installation Instructions
Using No.8 screws provided,
ensure that all four fixing
points on the back plate are
securely fitted

6
2.3
2.3.1
2.3.2
123
6
45
To remove outer front cover, rotate to the
left until retaining clips are released. Then
loosen the 3 fixing screws (see Note above).
Carefully open the electronics cover until
retention hinge is fully extended.
Cut the duct to width of the plasterboard or
tiled wall with slight fall to exterior.
(Make provisions for cable).
Using the four No 8 screws, secure fan
body to the wall. The electrical cable
passes through as appropriate. Wire fan
(See wiring details).
7
Carefully close the electronics cover,
ensuring that the outer rubber seal edges
are positioned correctly back into the fan
body.
Fully tighten the 3 fixing screws until they lock to
maintain IPX5 and avoid possible hazard. To
attach the outer front cover, rotate to the right,
utilising the guidance rail, until firmly secured by
the retaining clips.
Wall Mounting
Determine the most ideal location for the unit for this installation, also
taking account of the electrical services.
Ensure there is adequate access for installation and eventual
replacement. Note: The electronics cover has been designed to retain
and hold screws, for ease, when positioning/mounting the product to a
surface.
To maintain IPX5 and avoid possible hazard,
please mount the fan with orientation symbol
arrows facing upwards.
9
Screw the protective wall grille over the
external duct opening.
8
Fill in any gaps with mortar or foam and
make good internal and external walls.
Make sure that ducting remains circular.
Ø = 117mm

7
2.4
2.4.1
2.4.2
3
4 5
To remove outer front cover, rotate to the
left until retaining clips are released. Then
loosen the 3 fixing screws (see Note above).
Cut an opening through the ceiling for the
fan and electrical cable.
Place flexible or rigid ducting over the
spigot of the fan. Fit ducting to spigot using
appropriate method. Refer to section 2.5.
8
Diagram depicting typical installation ducted
through roof soffit. If ducted via a roof vent
follow guidelines set out with the Domestic
Ventilation Compliance Guide.
1
9
Diagram depicting typical installation ducted
through roof to external wall.
Fully tighten the 3 fixing screws until they lock
to maintain IPX4 and avoid possible hazard. To
attach the outer front cover, rotate to the
right, utilising the guidance rail, until firmly
secured by the retaining clips.
7
6
Carefully close the electronics cover,
ensuring that the outer rubber seal edges
are positioned correctly back into the fan
body.
2
Carefully open the electronics cover until
retention hinge is fully extended.
X = 65 Ø = 105mm
Ceiling Mounting
Determine the most ideal location for the unit for this installation, also
taking account of the electrical services.
Ensure there is adequate access for installation and eventual
replacement. Note: The electronics cover has been designed to retain
and hold screws, for ease, when positioning/mounting the product to a
surface.
To maintain IPX4 the unit must be securely
mounted using all four fixing holes provided
(see section 2.2). Wire fan (See wiring
details).

8
Ducting Guidelines
A 100mm nominal diameter spigot is provided for connection to ducting.
Ductwork should be securely connected to fan spigot. Failure to do this
will cause unnecessary air leakage and may impair performance.
All duct connections require sealing. Where ducts are installed against a
solid structure this can be difficult to achieve. In such locations
preassembly of duct sections should be considered. This will require that
connections are permanent to ensure the seal is maintained during
installation.
If applicable, Fire dampers MUST BE FITTED in accordance with Part B
of the Building Regulations.
Rigid Ducting - Install using the least number of fittings to minimise
resistance to airflow. Where access to ducts will not be possible after
construction is complete, i.e. within floor and wall voids, consideration
should be given to permanent connection and sealing with an appropriate
non-hardening sealant, and not using duct tape to achieve connection and
sealing.
Flexible Ducting - Ensure ducting lengths are kept to minimum and
ducting is pulled taut so that it is smooth and straight. Where bends are
necessary, and where ducting is run in restricted areas, ensure the
ducting is not crushed. Connection of lengths of flexible duct must use a
rigid connector and jubilee clips or similar to ensure a long term seal is
achieved. Connection of lengths of flexible duct should not be taped-only.
The fan exhaust must terminate to external air and be protected by a
suitable wall or roof terminal. Roof terminal to have a minimum equivalent
free area of 7,500mm2.
2.5
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.5.6

9
Electrical
Installation or disconnection must be carried out by a qualified
Electrician and all wiring must conform to IEE Wiring or local
Regulations.
Isolate electricity supply before starting work.
The Unity CV2GIP fan is double insulated and does not require an earth.
The Unity CV2SVGIP SELV fan is a class III and does not require an earth.
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.
The recommended alternative ‘switch-live’ switch for use is the -
GS2 switch.
The fan must not be mounted above or closer than 1m to the
cooker where it could be affected by excessive heat or moisture.
2.6
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
GS2 Remote Switch ositions Function
Trickle (I) Fan running at trickle speed
Boost (II) Fan running at boost speed
II
I

10
Wiring Details
Strip cable to correct lengths as shown in Figure 2 - Diagram 2.a.
Insert cable through cable entry point (A), and then clamp cable
using the cable clamp (B).
Push the wires into the terminal block (C) as per wiring diagram
(see section 2.7).
Tighten screws of the terminal connection.
Note: A facility to park the earth cable has been provided (D); as the fan
is double insulated no connection to earth is required.
2.6.8
(A)
(B)
(D)
(C)
Diagram 2.a.
(C)
Figure 2 - Wiring Details
230V
(C)
SELV

11
Wiring Diagrams
2.7
Fan Specifications
230V Model: IPX5 Wall, IPX4 Ceiling 220-240V ~ 50Hz / 1Ph
5 Watts max.
SELV Model: IPX5 Wall, IPX4 Ceiling 24DC: between controller
and fan 220-240V ~ 50Hz / 1Ph 5 Watts max.
Cable Sizes: Mains: Fixed flat wiring 2 core 1mm2, 3 core
1/1.5mm2
SELV Output: Circular wiring 3 core 0.75mm2
CV2GI
CV2SVGI
2.6.9
SELV Box Installation
Install SELV Back Plate and Power Supply (see images on page 12),
using the two fixing holes, in a suitable location outside of the room
where the Unity SELV fan (CV2SVGIP) is installed. The location should be
as such that air can circulate around the Power Supply unit and it should
never be covered.
The distance between the fan and the SELV Back Plate and Power Supply
should be kept to a minimum and ideally not be greater than 3.0m.
Strip cable to correct length (as shown in section 2.6.8) for CV2SVGIP and
SELV Back Plate.
2.8
2.8.1
2.8.2
2.8.3

12
Insert mains cable (A) and clamp using cable clamp provided (B).
Push the wires into the
terminal block (C) as per the
wiring diagram (see section
2.7). Tighten the terminal
block screws and ensure a
good connection.
Push circular low voltage
cable through cable entry point (D) and then secure cable using the cable
clamp (E).
Push the wires into the terminal block (F) as per the wiring diagram (see
section 2.7). Tighten the terminal block screws and ensure a good
connection.
Before fitting the SELV Box
Top remove suitable cable
knock outs that best suit
the entry position of both
the mains and low voltage
cables, ensure that they
are dressed and that all
sharp edges are removed to ensure cable insulation is not damaged.
Fit SELV Cover to SELV
Back Plate and Power
Supply and secure using
the 4 screws provided.
Insert low voltage cable
through the Unity fan’s
cable entry point and then secure cable using the cable clamp.
Push the wires into the fan’s terminal block as per the wiring diagram
(see section 2.7). Tighten the terminal block screws and ensure a good
connection.
2.8.4
2.8.5
2.8.6
2.8.7
2.8.8
2.8.9
2.8.10
2.8.11
From
Mains
Supply
AB
CFD
E
To CV2SVGIP
Fan Terminal
Cable entry knock outs
SELV Cover SELV Back Plate
Fixing Hole

13
Room Selection Buttons
(Bathroom / Kitchen)
Speed
Adjustment
HumidiSMART
On / Off
Boost Airflow
Commissioning
TimerSMART
On / Off
Trickle Airflow
Commissioning
On Site Commissioning / Set Up
This section covers set up, configuration of the unit for installation and
altering pre-set factory settings.
Removal of the Front Cover and Control anel Functions
Twist outer front cover anti-clockwise to remove. You will then see the
Control Panel.
2.9
2.9.1
2.9.2
Control anel

14
2.9.3
Step 2
Press Bathroom or Kitchen button
- light will go solid
Boost Airflow button will flash
– factory setting:
Press speed adjustment buttons to
required level and verify
- re-press Boost button to confirm
Trickle Airflow button will flash
– factory setting:
Press speed adjustment buttons to
required level and verify
- re-press Trickle button to confirm
Step 1
Step 3
For HumidiSMART press button to
turn on
- light will go solid
For TimerSMART press button to
turn on
- light will go solid
Step 5
Step 4
Bathroom 8 l/s Kitchen 13 l/s
Bathroom 5 l/s Kitchen 8 l/s
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
On first power up, both
Bathroom and Kitchen Room
selection button lights should
start to flash to indicate that
an appropriate installation
setting needs to be selected.

To Reactivate Commissioning Mode
Press any button to activate the panel. The current fan setup / status
should be shown via the panel lights.
To enter the commissioning mode press and hold [-/+] buttons
simultaneously for approximately 3 seconds until the Bathroom &
Kitchen lights flash – airflow settings from previous commissioning
should be recalled, these can now be re-adjusted.
Note: To ‘master reset’ press and hold [-/+] buttons simultaneously for
approximately 10 seconds until all lights flash to indicate the fan has
been reset to factory settings and then revert to both room selection
lights at start of commissioning mode.
erformance Graph Airflow Characteristics.
15
2.9.4
2.9.5
Note: The Unity CV2GIP / CV2SVGIP will automatically compensate for
fluctuations in back pressure, to meet Building Regulation requirements.

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 UK Ltd’s Standard Conditions of
Sale which are available on request. See website for warranty period details.
Zehnder Group UK Ltd reserves the right to change specifications and prices
without prior notice. © Copyright Zehnder Group UK Ltd 2017.
Zehnder Group UK Limited
Watchmoor Point, Camberley,
Surrey, GU15 3AD
Customer Services: [phone]
Technical Services: [phone]
Email: [e-mail]
Web: www.greenwood.co.uk
05.10.920 Issue 6 September 2017