6
nuaire.co.uk
029 2085 8400
19. 08. 19. Leaflet Number 671858
Installation and Maintenance
MRXBOXAB-ECO-LP1SW Mechanical Ventilation Unit with Heat Recovery
EXTRA
EXTRA
CT F
CT F
AN
LI
AF
Supply Extract Supply Extract Supply Extract
SPEED 1
SPEED 2
SPEED 3
3
2
7.0 ELECTRICAL CONNECTION
IMPORTANT
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.
Please note: 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.
Electrical details:-
Voltage: 240V 1ph 50Hz
Consumption: LP1 - 1.3 Amps
Fuse rating: 3 Amps
NOTE: 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.
Note: Wiring is for reference
purposes only as the
connections above are
factory fitted.
Connection to Remote Fail
Indicator Ref: MRXBOX95-RFI
(optional).
Fuse 2A
MAINS
230V
50Hz
light
Room
Light
switch
(Double
Pole)
N
L
3 Pole
isolator
Kitchen switch
Blue
Brown
Black
Optional speed 3 switch
Supply cord
from unit
Grey
Green/yellow
Fuse 2A
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 speed 3 switch
Grey
Unit serving kitchen and bathroom
Unit serving kitchen and two bathrooms
Figure 11. PCB Details
Figure 12.
Figure 13.
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.
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.
Figure 14.
Connection of summer/winter switch
Black
2 core cable
from unit
Red
Volt free Summer / Winter Switch (supplied with unit)
Polarity is inconsequential
Warning! - Do not connect to mains!
7.1 Examples of Typical Wiring Layouts
