6
27. 11. 17. Leaflet Number 671721
Installation and Maintenance
The WH1 Wall Mounted Range of Units
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.
5.0 Electrical Connection
Please note: the electrical connection of the unit must be 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: 1.3 Amp
Fuse rating:
3 Amp
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.
Fuse 2A
MAINS
230V
50Hz
Room
light
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
Unit serving kitchen and bathroom
Figure 12.
Unit serving kitchen and two bathrooms
Figure 13.
SWL2 L
SWL1
L
N
C
N
7
E
X
T
R
A
C
T
C
N
6
S
U
P
P
LY
BLU
WHI
YEL
RED
SUPPL
Y
BYP
ASS
SUPPLY F
AN
EXTRACT F
AN
B
L
U
B
R
N
B
R
N
B
L
U
EXTRACT F
AN
B
L
U
B
R
N
EXTERNAL PUMP
BLU
WHI
YELI
RED
F
A
IL
CN8
TH1
TH2
L N
CN5
Connection to Remote Fail
Indicator Ref: MRXBOX95-RFI
(Optional)
3
2
Figure 11a.
Note: Wiring is for reference
purposes only as the connections
in fig. 11a are factory fitted.
The unit is pre-wired with a
2 metre fly lead.
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 11b. 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 (fig 11b). The cable should be fed
through rubber blanking plug to provide a seal when
the cover is re-fitted.
Connector for
Ecosmart devices
Power Cable
Fuse 2A
MAINS
230V
50Hz
Room
lights
Light
switches
(Double
Pole)
N
L
3 Pole
isolator
Kitchen switch
Green/yellow
Blue
Brown
Black
Supply cord
from unit
Optional s
peed 3
switch
Grey
5.1 Optional Controls
For further information contact Nuaire on 029 2085 8400.
If more than one Ecosmart sensor is required
please use MRXBOX-JB and refer to leaflet
No. 671700 for installation instructions.
Supply Supply Extract Extract
Speed1 Speed2 Speed1 Speed2
