Installation
21
Connect the Power Supply
WARNINGS
1.
MAINS
SUPPLY
VOLTAGES
(220
‐
240
V
AC)
ARE
PRESENT
IN
THIS
EQUIPMENT
WHICH
MAY
CAUSE
DEATH
OR
SERIOUS
INJURY
BY
ELECTRIC
SHOCK.
ONLY
A
QUALIFIED
ELECTRICIAN
OR
INSTALLER
SHOULD
CONNECT
THE
POWER
SUPPLY
TO
THIS
UNIT.
2.
THIS
UNIT
MUST
BE
CORRECTLY
EARTHED.
This
unit
is
designed
for
operation
from
a
single
‐
phase
alternating
current
source
(220
‐
240
V
AC).
A
1.5
m
cable
is
connected
internally
to
the
unit
for
connection
to
a
switched
fused
spur.
To
connect
the
power
supply:
1.
Ensure
the
local
AC
power
supply
is
switched
off.
2.
One
end
of
the
power
cable
supplied
is
already
connected
to
the
unit
and
routed
through
the
Cable
Inlet
Plate
via
a
suitable
gland
to
ensure
the
IP
rating
of
the
unit
is
not
affected.
3.
Connect
the
other
end
of
the
cable
to
the
switched
fused
spur.
4.
Use
cable
clamps
and
clips
to
secure
the
cable,
as
appropriate.
Connecting a Boost (Light) Switch
A
Switched
Live
(LS1
or
LS2)
may
be
used
to
boost
the
airflow
when
a
light
is
turned
on,
for
instance
in
a
bathroom
or
kitchen.
Note
that
the
LS2
connection
has
a
boost
start
time
delay
of
5
minutes.
In
the
event
that
the
unit
is
inadvertently
left
running
on
boost,
it
will
revert
to
normal
speed
after
2
hours.
Power
supplied
to
the
unit
via
the
LS1
or
LS2
connections
must
be
supplied
via
the
same
circuit
as
the
incoming
L
mains
as
indicated
on
p20.
