220
-
240V~50Hz
Lo
-
Carbon
MVDC & SENTINEL
MULTIVENT
RANGE
VENTILATION SYSTEMS
Installation and Wiring Instructions
ORIGINAL ENGLISH MANUAL. DOWNLOAD THE APP HERE:
PLEASE KEEP THIS MANUAL AND READ IN CONJUNCTION WITH THE ILLUSTRATIONS.
Stock Ref. N°
MVDC-MS 437634C
MVDC-MSH 443298B
MVDC-MSH UniFlex 498502
SMV-H 445655B
SMV-HX 495360
SMV-HX CO² 495361
SMV PLUS-H 407849A
SMV PLUS-HX 495362
SMV PLUS-HX CO² 495363
SMV PLUS-H 496186
(Ventair)
X-Units have wireless controls and
Bluetooth capability.
IPX2
Installation and Wiring Instructions for the Multivent Multi-Speed Extract Fans.
IMPORTANT:
READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION
Do not install this product in areas where the following may be present or occur:
Excessive oil or a grease laden atmosphere.
Corrosive or flammable gases, liquids or
vapours.
Subject to direct water spray from hoses.
All wiring must be in accordance with the current IEE wiring regulations BS7671, or appropriate standards
of your country. Installation should be inspected and tested by a suitably qualified person after completion.
Ensure the mains supply (voltage, frequency and phase) complies with the rating label.
The unit should be provided with a local double pole fused spur fitted with a 3A fuse having a contact
separation of at least 3mm.
Units showing on the rating label incorporate an earth connection for functional purposes only.
Units showing on the rating label have a Protective Earth.
Precautions must be taken to avoid the backflow of gases into the building from the open flue of gas or
other fuel-burning appliances.
Ambient temperatures higher than 40°C
and lower than -20°C.
Possible obstructions that may hinder
access to or removal of the unit.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
Young children should be supervised to ensure that they do not play with the appliance.
Cleaning and user maintenance shall not be made by children
The installer is responsible for the installation and electrical connection of the unit on site. It is the
responsibility of the installer to ensure that the equipment is safely and securely installed and left only
when mechanically and electrically safe.
All regulations and requirements must be strictly followed to prevent hazards to life and property, both
during and after installation, and during any subsequent servicing and maintenance.
Certain applications may require the installation of sound attenuation to achieve the sound levels required.
The unit must not be connected directly to a tumble drier.
The exhaust grille should be located in accordance with building regulation and be at least 300mm away
from any flue outlet.
This product and associated duct installation should be carried out in accordance with the Domestic
Ventilation Compliance Guide.
Models that support Radio and Bluetooth communication the below applies
Bluetooth variants contain FCC ID: S9NSPBTLERF
Bluetooth LE: -12dBm EIRP (63μW), nominal 2450MHz.
Bluetooth v4.1 compliant
Bluetooth and radio variants obtained RED certificate: No. 0051-RED-0011 REV. 0
Zirconia Wireless: -14dBm EIRP nominal 868MHz.
The manufacturer hereby assure that this type of Bluetooth radio and 868MHz radio
equipment complies with RED Directive 2014/53 / EU
The full text of the EU Declaration of Conformity can be found at the following URL:
https://www.vent-axia.com/range/centralised-mechanical-extract-ventilation-mev
2
INTRODUCTORY NOTES
The MVDC & Sentinel Multivent units are designed for simultaneous extract ventilation of multiple wet
rooms such as bathrooms, kitchens and toilets. The units use a highly efficient backward curved centrifugal
motor impeller set and are designed for continuous 24-hour use.
Depending on the model, they feature either 3 or4 settable speeds and can be configured to change speed
based on a wide range of sensor or control inputs as depicted below
Model MVDC-MS MVDC-MS H
Speeds 3 3 4 4 4 4 4 4
Max airflow
m3/hr (0Pa)
Switched Live Input
(LS)
RS485
Connectivity
Analogue Input
0-10V
Digital Input Yes Yes Yes Yes Yes Yes Yes Yes
Humidity Sensor No Yes Yes Yes Yes Yes Yes Yes
430 430 463 463 463 573 573 573
Yes Yes Yes Yes Yes Yes Yes Yes
No No Yes Yes Yes Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes Yes
SMV
H
SMV
HX
SMV
HX Co2
SMV Plus H SMV Plus
HX
SMV Plus
HX Co2
CO2 Sensor No No No No Yes No No Yes
Wireless Receiver No No No Yes Yes No Yes Yes
The units can be precisely programmed to determine how they respond to changes in sensor values or the
status of the various signal inputs. The units will run at a normal flowrate until a sensor or input change
causes it to change speed. In the case of the Switched Live and Digital inputs the units will perform a step
change in speed to the appropriate new level. In the case of the Analogue inputs, Humidity Sensor and
CO2 sensor the unit can be programmed to give a proportional response to the change in conditions.
INSTALLATION
Position the unit, taking into consideration the position of the rooms to be ventilated, the exhaust position
and the electrical services. Ensure there is adequate access for installation and maintenance.
If the unit is sited in the heated void of the dwelling a condensate drain should not be necessary.
When sited in a cold void, consideration should be given to fitment of a condensate drain. Alternatively, the
unit and ducting can be externally insulated to minimize condensation within the units housing.
To reduce the system resistance in your duct system, and therefore lower the speed, power consumption
and noise of the fan, follow these guidelines:
1.1. Keep the length of duct runs to a minimum, particularly the exhaust duct run.
1.2. If you need to use flexible ducting, make sure that it is fully extended and not crushed,
sagging or torn.
1.3. Try to minimize the use of diffusers/valves by having similar length duct runs to the inlets.
1.4. The bend radius (measured to the inside of the bend) should be at least 1x the duct diameter.
1.5. Avoid having any bends, filters or other obstructions within 250mm of the fan inlets and outlet.
1.6. Set the valves to their maximally opened positions for a minimal pressure drop.
Securely mount the unit through the mounting holes on the casing using appropriate fixings for the
mounting substrate. It is recommended that anti-vibration mounts, acoustic mat or rubber bushes are used.
Fixings (not supplied) to be capable of securing 4 x the weight of the unit. Unit weight: 4.1kg
3
To maintain the IPx2 rating of the unit, the unit must NOT be mounted with the cover removal slots
facing upwards, or at an angle where they are visible from above.
All other orientations are acceptable.
See the dimensional details below for the mounting hole positions.
-Spigot diameters are 125mm
4
i. Base mounted Installation with ducting radiating out horizontally.
ii. Vertically mounted Installation with the exhaust spigot at top. The electrical connections must
come out of the bottom of the unit in order to maintain the water ingress protection.
5
iii. Ceiling mounted Installation with ducting radiating out horizontally.
WIRING
WARNING:
THE UNIT AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
FROM THE POWER SUPPLY DURING THE INSTALLATION / OR
MAINTENANCE. THIS UNIT MUST BE EARTHED.
1. To remove the cover, use a coin or similar; depress the retaining tabs via the slots in the side of the
unit.
2. With the power off, connect a suitable mains power cable from a switched, fused spur to the screw
terminal block. Use the cable clamps and clip provided to secure the lead.
3. Two mains voltage Live Switched (LS1 and LS2) connections are provided and can be used to
trigger a change in speed. Common inputs would be from a bathroom lighting circuit. When
commissioning the unit, a delay on timer and an overrun timer can be selected and adjusted in the
software using the buttons and screen. See Commissioning section on page 9 of this document for
details.
4. The switched live output (230Vac) from any other switch or controller, (such as a simple latching pull
cord or push button switch, humidistat or PIR detector) can be connected to the LS terminal instead
of connecting to a lighting circuit.
5. Important: Use 4-core, low voltage, twisted pair, telecoms type cable for accessories (Vent-Axia part
number 459931). Accessories are connected via the IO (Input Output) PCB; see the Low Voltage
Connections diagram. Use the cable clamp and grommet provided.
6. There are no delay-on or overrun timers with the volt-free connection as the controller should
determine when the fan is running at Boost or Normal speeds. Use the LS connection described
above if you want a timer.
Units showing on the rating label incorporate an earth connection for functional purposes only.
7.
Units showing on the rating label have a Protective Earth.
8.
6
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