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05. 11. 21. Document Number 671999
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO-LP2B
Installation Manual
3.10 Typical Ducting Installation - Opposite Hand Unit Configuration
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Typical Ducting Installation - Opposite Hand Unit Configuration
Supply air to
lounge via
in ceilings.
Air Valve
Extract air from
kitchen via
in ceilings.
Air Valve
Supply air to
bedrooms via
in ceilings.
MVHR-DRAIN
Air Valve
condensate drain,
running to SVP.
mounted unit.
Nuaire ceiling void
Extract air from
bathroom via
in ceilings.
Air Valve
Exhaust air from
kitchen/bathroom to
outside via air brick.
Supply and extract
ducts from external
air bricks to the unit
needs to be insulated.
Top of ceiling void.
Minimum distance as
specified in Building
Regulations.
Intake air from
outside via air brick.
4.0 ELECTRICAL INSTALLATION
For good EMC engineering practice, any sensor cables or switched
live cables should not be placed within 50mm of other cables or on
the same metal cable tray as other cables.
The electrical connection of the unit must be carried out by a
qualified electrician.
The unit is supplied with a flexible cord for connection to the mains
supply.
4.1 Electrical Information
Electrical details:
Voltage: 240V 1ph 50Hz
Consumption: 1.3 Amp
This unit must be earthed.
The cable from the mains power supply should be connected to a
fixed wiring installation, via a fused isolator, in accordance with
current IEE wiring regulations.
Wiring is for reference purposes only as the connections in Figure 11 are
factory fitted. The unit is pre-wired with a 2 metre fly lead.
4.2 PCB Details
Supply Supply Extract Extract
Speed1 Speed2 Speed1 Speed2
11
PCB Details
4.3 Wiring Diagrams
4.3.1 Unit Serving Kitchen & Bathroom
Disconnection from the
supply mains must be
incorporated within the fixed
wiring in accordance with the
wiring regulations and shall
have a minimum contact
separation of 3mm.
3A Fuse
(BS 1362)
MAINS
230V
50Hz
Light
Room
Light
Switch
(Double
Pole)
N
L
3 Pole
Isolator
Kitchen Switch
Blue
Brown
Black
Optional 3 Speed Switch
Supply Cord
From Unit
Grey
Green / Yellow
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Wiring Diagram - Kitchen & Bathroom
