Zehnder Rittling Centair CMEV.4e User manual

Centair
CMEV.4e / CMEV.4eHT
Mechanical Extract Ventilation (MEV) System
User / Homeowner Guide
Commissionin and Inspection Record:
Located on page 5 of this guide should have been completed by the Commissioning Engineer.

User / Homeowner Information Page
1.0 Ventilation in Your Home 2
2.0 General Overview 3
3.0 Servicing / Maintenance 4
4.0 Commissioning & Inspection record 5
5.0 Declaration of Performance (DOP) 9
6.0 Guarantee / Warranty Information 11
Contents
Overview
Your home has a continuously running ventilation (MEV) system installed. This consists of a central extract
system that is linked by a network of ducts to extract air on a continual basis from the following areas in
residential dwellings –
• Kitchen
• Bathroom
• Utility Room
• WC / Cloakroom
• Ensuite Bath / Shower Room
2
1.0 Ventilation In Your Home
Figure 1

3
Depending on the way your MEV unit has been installed the specific operation of your fan may vary. The unit
has three speeds available but may not have been wired to use them all. Options are –
1) Trickle Speed: Operating on a continual basis.
2) Medium Speed: Activated automatically using external sensor control or manually with GS1
switch.
3) Boost Speed: Activated automatically using external sensor control / light-switch or
manually with GS1 / GS2 switch.
Note; Not all three speeds may be operational. Medium speed may be disconnected (when using only a
light-switch or GS2 switch without an additional external sensor control).
To maintain good indoor air quality within the dwelling it is important that the ventilation system remains in
operation at all times unless powered down periodically for maintenance/repair.
Depending on when your home was built background window trickle ventilators may be provided in dry habitable
rooms. Trickle vents should not be installed in the same rooms as the mechanical extract valves as overall
ventilation effectiveness can be reduced.
Warnin : 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 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.
If the supply cord is dama ed, it must be replaced by a special cord/assembly available
from the manufacturer or its service a ent. The replacement must be carried out by a
qualified Electrician in accordance with IEE or local re ulations.
SMART Technolo y - CMEV.4eHT Only
To maintain a healthy indoor environment the CMEV.4eHT includes SMART technology for Over-run Timer
(Greenwood TimerSMARTTM) and Humidity (Greenwood HumidiSMARTTM).
Greenwood TimerSMARTTM monitors the length of time that there is an occupancy presence within a wet-room
and provides a fixed over-run time period to best match the length of time that the ‘switch live’ is active (as
shown below):
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
CMEV.4eHT is not on boost for prolonged periods of time due to the higher ambient humidity levels caused
during the hot summer months.
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.
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.0 General Overview
Time ‘Switch Live’ is Active Over-run Boost Period
0 – 5 minutes No over-run
5 – 10 minutes 5 minutes
10 – 15 minutes 10 minutes
15+ minutes 15 minutes
II
I
II
I
GS2 switch markings -
Trickle (I) & Boost (II)
Operation
GS1 switch markings -
Trickle (Centre) Medium (I)
& Boost (II) Operation
(For use with CMEV.4eHT only)

4
CMEV.4e & CMEV.4eHT units contain a self-cleaning backward curved impellor that requires no servicing.
The fan motor has sealed for life bearin s, which do not require lubrication.
Periodic cleaning of the ceiling extract valves should be carried out as required taking care not to adjust the
valves set position as this may cause either under ventilation or unnecessary over ventilation to occur.
Consideration should be given to access for complete unit replacement. For installations where the unit is
hidden behind a panel we recommend a minimum size access panel of 600mm2. This is to ensure that the
ducts can be disconnected and reattached with ease. (See Figure 2).
Figure 2 – Access for Maintenance
3.1.1
3.1.2
3.1.3
3.1.4
3.0 Servicin / Maintenance
Footprint of CMEV.4e
& CMEV.4eHT
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.
2.1.9

Part 2a – Installation details
2.1 Installation Checklist – General (all Systems) Tick as appropriate
Has the system been installed in accordance with
manufacturer’s requirements?
Have relevant system installation clauses been followed as detailed in
Tables 1 3 5 and 7 as applicable?
Type of ductwork installed
(e.g. rigid semi-rigid)
If any deviation from Tables 1 3 5 and 7
these should be detailed here.
Description of installed controls (e.g. timer
central control humidistat PIR etc)
Location of manual/override
controls
This section should be used to record all installation details. The Commissioning Engineer should use the
following Parts 1 to 3 to record important information relating to the installation of which should be
incorporated into the Home Information Pack for the homeowner to keep.
• Part 1 – System details and declarations
• Part 2a – Installation details
•Part 2b – Inspection of installation
• Part 3 – Air flow measurement test and commissioning details
4.4.1
5
4.0 Commissionin & Inspection Record
Part 1 – System details and declarations
1.1 Installation Address Details
Dwelling Name/Number
Street
Locality
Town
County
Post Code
1.2 Installation Details
System Classification* System 3 – Mechanical Extract Ventilation
Manufacturer Zehnder Group UK Limited
Model Number
Serial Number (where available)
Location of MEV Unit
*Note. If a system has been installed that is not defined by System 1 to 4 in Approved Document F further installation checks
and commissioning procedures may be required. Seek particular guidance from the manufacturer for these systems.
Yes No
Yes No

6
2.2 Installation En ineers Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/
Registration Number (if applicable)
Date of Installation (completion)
Part 2b – Inspection of Installation
This section should be completed before completing Part 3.
2.3a Visual Inspections – General (all Systems) Tick as appropriate
Total installed equivalent area of background ventilators in dwelling?
Total floor area of dwelling?
Does the total installed equivalent ventilator area meet the requirements given in
Tables 5.2a 5.2b or 5.2c in ADF?
Have all background ventilators been left in the
open position?
Have the correct number and location of extract fans/terminals been installed
that satisfy Table 5.2a in ADF?
Is the installation complete with no obvious
defects present?
Do all internal doors have sufficient undercut to allow air transfer between rooms
(i.e. 10 mm over and above final floor finish)?
Has all protection/packaging been removed (including from background ventilators)
such that system is fully functional?
For ducted systems has the ductwork installation been installed in such manner that
air resistance and leakage is kept to a minimum?
Are the correct number and size of background ventilators provided that
satisfy ADF?
Has the entire system been installed such that there is sufficient access for routine
maintenance and repair/replacement of components?
2.3b Visual Inspections – General (Systems 3 and 4 only)
Have appropriate air terminal devices been installed to allow
system balance?
Has the heat recovery unit (System 4 only) and all ductwork been effectively insulated
where installed in unheated spaces?
Condensate connection is complete and drains to an appropriate location
(System 4 only)?
mm
m2
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No

7
2.3c Other Inspections – General (Systems 1, 3 and 4 only)
Upon initial start up was any abnormal sound or vibration experienced
or unusual smells detected?
2.3d Inspector’s Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/
Registration Number (if applicable)
Date of Inspection (completion)
Yes No
Measured
Air Flow
High Rate (l/s)
Design Air Flow
High Rate (l/s)
Refer to Table 5.1a ADF
Measured
Air Flow
Low Rate (l/s)
Design Air Flow
Low Rate (l/s)
Refer to Table 5.1a in ADF
Part 3 – Air flow measurement test and commissionin details
3.1 Test Equipment
Schedule of air flow measurement equipment used Date of last UKAS calibration
(model and serial)
1.
2.
3.
3.3 Air Flow Measurements (Extract) – System 3 and 4 only
Room reference
(location of terminals)
Kitchen
Bathroom
En Suite
Utility
Other…
Other…
Other…

3.5 Commissionin – Systems 3 and 4 only
Have controls been set-up in accordance with the manufacturer’s recommendations?
Have all distribution grilles been locked to prevent unauthorised adjustment?
3.6 Test En ineer’s Details
Name
Company
Address Line 1
Address Line 2
Telephone Number
Post Code
Signature
Competent Person Scheme/
Registration Number (if applicable)
Date of Test
Yes No
Yes No
8

9
5.0 Declaration of Performance
Supplier Name or Trade Mark
Supplier Model Identifier and ptions Installed
SEC in [kWh/(m2a)] specific energy consumption
(Cold, Average, Warm)
SEC Class
(Cold, Average, Warm)
Declared Typology
Type of Motor Drive Installed
Type of Heat Recovery
Heat Recovery Efficiency
Maximum Flow Rate in (m3/h) / (l/s)
Electric Power Input at Maximum Flow Rate (W)
Sound Power Level (LWA) in dB(A))
Reference Flow Rate in (m3/h) / l/s)
Reference Pressure Difference
SPI in [W/(m3/h)]
Control Factor and Typology
Declared Maximum Internal and External Leakage (%)
Position and Description of Visual Filter Warning
Internet Address for Preassembly / Disassembly Instructions
AEC (kWh electricity/a) for Each Climate
(Cold, Average, Warm)
AHS (kWh electricity/a) for Each Climate
(Cold, Average, Warm)
Greenwood Airvac
Local Demand Control
(with 2 or more sensors)
-54.6 -27.5 -12.0
A+ BE
Unidirectional
Variable Speed
None
n/a
352 / 98
36
51
245 / 68
50
0.06
.65
Internal: n/a
External: n/a
n/a
www.greenwood.co.uk
0.3 0.3 0.3
55.4 28.3 12 .8
Greenwood Airvac
Central Demand Control
(with 1 sensor)
-41.6 -20.6 -8.6
ADF
Unidirectional
Variable Speed
None
n/a
352 / 98
36
51
245 / 68
50
0.06
.85
Internal: n/a
External: n/a
n/a
www.greenwood.co.uk
0.5 0.5 0.5
42.9 21.9 9.9
Declaration of Performance
Residential Ventilation Unit Greenwood Centair CMEV.4e / HT

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