5
14. 02. 14. Leaflet Number 671496
Installation and Maintenance
MRXBOX95-LH1/LH2 Mechanical Ventilation with Heat Recovery
See fuse
rating
MAINS
230V
50Hz
Room
light
Light
switch
(Double
Pole)
N
L
3 Pole
isolator
Kitchen switch
Green/yellow
Blue
Brown
Black
Summer
bypass
switch
Grey (only used
on bypass unit)
Supply cord
from unit
Unit serving kitchen and bathroom
Unit serving kitchen and two bathrooms
MAINS
230V
50Hz
Room
lights
N
L
3 Pole
isolator
Kitchen switch
Green/yellow
Blue
Brown
Black
Summer
bypass
switch
Grey (only used
on bypass unit)
Supply cord
from unit
See fuse
rating
Light
switches
(Double
Pole)
Figure 8.
Figure 9.
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.
4.0 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: LH1 - 1.3 Amp
LH2 - 2.2 Amp
Fuse rating:
LH1 - 3A Amp
LH2 - 5A 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.
S
W
L
Fan Failure
Indicator
S
U
P
P
L
Y
E
X
T
R
A
C
T
RE
D
YE
L
WH
I
BL
U
RE
D
YE
L
WH
I
BL
U
FA
N 1
S
UP
PL
Y
L
N
S
U
P
P
L
Y
T
E
M
P
F
A
IL
Fan
Connections
Connection to
Remote Fail
Indicator
(See 5.0)
Speed Control
Pots (See 6.0)
C
o
n
n
e
c
t
io
n
t
o
s
u
p
p
ly
c
o
r
d
2
3
0
V
I
N
5
0
H
z
M
a
in
s
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.
Earth point
L
N
N
L
FA
N 2
S
UP
PL
Y
B
Y
P
A
S
S
Power
Indicator
3
2
Figure 7.