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17. 11. 21. Document Number 671861
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
MRXBOXAB-ECO3-AE(OH)SW & MRXBOXAB-ECO5-AE(OH)(SC/SW)
Installation Manual
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
Unit
Consumption
ECO3
1.2 Amp
ECO5
2 Amp
Voltage: 240V 1ph 50Hz
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.
If an Ecosmart device is to be connected the removable cover found
next to the power cable exit on the base panel of the enclosure
should be removed by loosening the two screws, the Ecosmart
cable can then be connected to the underside of the MVHR unit
within. The cable should be fed through rubber blanking plug to
provide a seal when the cover is re-fitted.
4.2 Wiring Diagrams
4.2.1 Unit Serving Kitchen And Bathroom
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Wiring Diagrams - Unit Serving Kitchen And Bathroom
ECO3:
3A Fuse (BS 1362)
ECO5:
5A 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
4.2.2 Unit Serving Kitchen And Two Bathrooms
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Wiring Diagram - Unit Serving Kitchen And Two Bathrooms
MAINS
230V
50Hz
Room
Lights
Light
Switches
(Double
Pole)
N
L
3 Pole
Isolator
Kitchen Switch
Blue
Green / Yellow
Brown
Black
Supply Cord
From Unit
Optional 3 Speed Switch
Grey
ECO3:
3A Fuse (BS 1362)
ECO5:
5A Fuse (BS 1362)
4.2.3 Summer / Winter Switch
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Wiring Diagram - Summer / Winter Switch
Black
2 core cable from
ventilation unit
Red
Volt free Summer / Winter Switch
(supplied with ventilation unit)
Polarity is inconsequential
Warning! - Do not connect to mains!
EXTRA
EXTRA
CT F
CT F
AN
Supply Extract Supply Extract Supply Extract
SPEED 1
SPEED 2
SPEED 3
Wiring is for
reference purposes
only, connections
shown are factory
fitted.
The unit is pre-wired
with a 2 metre fly
lead.
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PCB Details