Vent-Axia Multihome Basic NL Assembly instructions

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IPX2

220-240V~50Hz

MULTIHOME

RANGE

VENTILATION SYSTEMS

Installation and Wiring Instructions

Basic (NL) 8000001174

Wireless (NL) 8000001175

Basic Perilex (NL) 8000001176

Basic Perilex CO2(NL) 8000001260

Wireless Perilex (NL) 8000001177

Wireless Perilex CO2(NL) 8000001261

Wireless (BE) 1003000074

Uniflexplus+ Wireless (BE) 1003000075

Wireless CO2(BE) 1003000077

Uniflexplus+ Wireless CO2(BE) 1003000078

Installation and Wiring Instructions for the Multihome 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.



Ambient temperatures higher than 40°C

and lower than -20°C.



Possible obstructions that may hinder

access to or removal of the unit.



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.



This appliance incorporates an earth connection for functional purposes only



Precautions must be taken to avoid the back-flow of gases into the building from the open flue of gas or

other fuel-burning appliances.



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 done 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 at least 600mm 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

INTRODUCTORY NOTES

The Multihome units are designed for simultaneous extract ventilation of multiple 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. Approved for ventilation according to NBN D50-001 (BE)

and NEN-en 13053 (NL). Units are supplied ready to use and include a power plug or Perilex lead.

The units feature 4 settable speeds and can be configured to change speed based on a wide range of

sensor or control inputs as depicted below

Figure 1

Model

Settable

Speeds

Max

airflow

(m3/hr

@150

Pa)

Switched

Live Input

(LS)

RS485

Connection

Analogue

and

Digital

Input

Humidity

Sensor

(Internal)

CO2

Sensor

(Internal)

Wireless

Receiver

Bluetooth

Multihome

Basic (NL)

300

Yes

Multihome

Wireless (NL)

368

Yes

Multihome

Basic Perilex

(NL)

300

Yes

Multihome

Basic Perilex

CO2(NL)

300

Yes

Multihome

Wireless

Perilex (NL)

368

Yes

Multihome

Wireless

Perilex CO2

(NL)

368

Yes

Multihome

Wireless (BE)

368

Yes

Multihome

Wireless CO2

(BE)

368

Yes

Multihome

Uniflexplus+

Wireless (BE)

368

Yes

Multihome

Uniflexplus+

Wireless CO2

(BE)

368

Yes

Figure 1

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, Digital, Analogue, Wired and Wireless inputs

the units will perform a step change in speed to the appropriate new level. In the case of the Humidity

Sensor and CO2sensor the unit can be programmed to give a response to the change in conditions.

Pressure vs Flow curves

Wireless (NL) 8000001175

Wireless Perilex (NL) 8000001177

Wireless Perilex CO2(NL) 8000001261

Wireless (BE) 1003000074

Uniflexplus+ Wireless (BE) 1003000075

Wireless CO2(BE) 1003000077

Uniflexplus+ Wireless CO2(BE) 1003000078

Basic (NL) 8000001174

Basic Perilex (NL) 8000001176

Basic Perilex CO2(NL) 8000001260

Figure 2

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. The unit can

be mounted horizontally or vertically. It can be positioned on the floor, wall or ceiling.

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 thereby avoid an increase in speed, power

consumption and sound 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. Tryto minimize the systems pressure dropby designing for lower in-duct velocitiesand connect to

the rooms with low pressure drop ceiling valves.

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. Anti-vibration mounts; acoustic mat or rubber bushes can also be used.

Fixings (not supplied) must be capable of securing 4 x the weight of the unit. Unit weight: 4.1kg

To maintain the Ingress Protection (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. Do not mount the unit with the outlet duct pointing down.

See the dimensional details below for the mounting hole positions.

Spigots are 125mm diameter. 125 –150mm accessory adaptors are available.

When installing Ø90mm ducting onto a Uniflexplus+ unit, keep inserting the

ducting into the sockets until three clicks have been heard.

Full insertion of the ducting is necessary to achieve a

seal with the unit.

Cover removal slots.

Figure 3

Figure 4

Figure 5

Figure 6

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.

Figure 7

Figure 8

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 Unit Adjustment section on page 12 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 low voltage twisted pair, data cable for accessories that 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 when connecting via the Low Voltage connections (B), as

the controller should determine when the fan is running at Boost or Normal speeds. Use the LS

connection described above if a timer is needed.

Figure 9

CONNECTION DIAGRAM

A: Main power connections

The LS1, LS2 and NS terminals are electrically isolated.

If the LS connections are used, a connection must be made with the NS terminal.

This can be via a jumper or dedicated neutral connection.

This appliance incorporates an earth connection for functional purposes only.

Connection

Description

Live (220-240Vac)

Neutral

Functional Earth

LS1

Live Switched 1, (220-240Vac), isolated

LS2

Live Switched 2 (220-240Vac), isolated

Neutral Switched, isolated

Main power

connections

Low voltage

connections,

if fitted

Figure 10

Figure 11

B: Low voltage connections

For best performance use 4-core, low voltage, twisted pair, telecoms type cable for accessories.

Figure 12

Position

Label

Description

Action

RS485

5V Output, Max 250mA

RS485 communication to wired accessories.

Data connection (B, C) if available.

The 5V and Ground connections are available on all units.

A+

Data

B-

Data

GND

Ground

D IN 2

COM

Digital input common

Go to Boost speed (Min.1V, max. 6V).

The 5V output from the RS485 connection can be used as

a power supply

Digital input 2

D IN 1

COM

Digital input common

Go to Low speed (Min.1V, max. 6V).

The 5V output from the RS485 connection can be used as

a power supply

Digital input 1

D OUT 2

COM

Digital output common

Unpowered Boost indicator Switch

(switching 6V 50mA max)

Digital output 2

D OUT 1

COM

Digital output common

Unpowered LED fault indicator switch

(switching 6V 50mA max)

Digital output 1

AN 2

Analog input 2

0-10V analogue input.

Two user settable voltage thresholds with two user settable

actions. The unit will run at Normal when supplied voltage is

between the two thresholds.

GND

Ground

AN 1

Analog input 1

GND

Ground

RS485 Wired inputs

The RS485 terminals are used to connect compatible sensors and switches.

The connection allows sensors be daisy chained to simplify wiring. The maximum length of cable run from

the unit is limited to 250m. Once accessories are wired to the unit, they must be paired to the unit to

function correctly.

RS485 Wired input connection diagram

Figure 13

Figure 14

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