5
08. 05. 14. Leaflet Number 671640
Installation and Maintenance
MRXBOX95AB-WM2 Mechanical Ventilation with Heat Recovery & Summer Bypass
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: WM2 - 1.3 Amp
Fuse rating:
3 Amp
NOTE This unit must be earthed.
The three core 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
Fuse 2A
MAINS
230V
50Hz
Room
lights
Light
switches
(Double
Pole)
N
L
3 Pole
isolator
3 Pole
isolator
Kitchen switch
Kitchen switch
Blue
Brown
Black
Optional summer boost switch
Supply cord
from unit
Green/yellow
Blue
Brown
Black
Supply cord
from unit
Optional summer boost switch
Grey
Grey
Green/yellow
Unit serving kitchen and bathroom
Unit serving kitchen and two bathrooms
Figure 9.
Figure 10.
S
WL
2
L
S
WL1
L
N
C
N
7
E
X
T
R
A
C
T
C
N
6
S
U
P
P
L
Y
BLU
WHI
YEL
RED
S
UPPL
Y
B
YP
ASS
SU
PPL
Y FAN
EXTRA
CT F
AN
B
L
U
B
R
N
B
R
N
B
L
U
EX
TRACT F
AN
B
L
U
B
R
N
EXTERN
AL PUMP
BLU
WHI
YELI
RED
F
A
IL
CN8
TH1 TH2
L
N
Supply Supply Extract Extract
Trickle
Boost Trickle
Boost
CN5
Connection to Remote Fail
Indicator Ref: MRXBOX95LH-RFI
3
2
Note: Wiring is for reference
purposes only as the connections
above are factory fitted.
The unit is pre-wired with a
2 metre fly lead.
Figure 8.
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.
