1701ULTRA(EC)GBEN, p. 22/29
12.
MAINTENANCE
Attention
It
is
recommended
that
maintenance
is
carried
out
at
least
once
a
year.
More
frequent
servicing
may
be
required
dependent
upon
the
environmental
circumstances
where
the
air
heater
is
installed.
Regular
inspection
is
necessary,
especially
in
dirty
areas,
to
assess
the
servicing
frequency.
Removal
of
service
panel
1.
Remove
door
lock
at
upper
and
underside.
2.
Lift
the
panel
holding
it
at
the
bottom.
Substitution
of
combustion
air
fan
1.
Turn
off
the
main
gas
supply.
2.
Set
the
room
thermostat
so
there
is
no
heat
demand.
3.
Wait
until
the
air
circulation
fan
has
stopped
running.
4.
Check
that
the
electrical
supply
is
turned
off.
5.
Remove
the
service
panel
(see
‘removal
of
service
panel’).
6.
Disconnect
the
plugs
from
the
combustion
air
fan.
7.
Remove
the
bolts
between
the
combustion
air
fan
and
the
(bent)
gas
supply
tube.
Remove
the
gasket.
8.
Remove
the
fixing
screws
(or
the
assembly
in
case
of
a
ULTRA
075/100
EC)
connecting
the
air
intake
restriction
and
the
combustion
air
fan.
9.
The
combustion
air
fan
can
now
be
removed.
10.
Remove
all
the
dust
from
the
combustion
air
fan
with
a
soft
cloth
or
brush.
11.
Check
that
the
motor
and
the
turbine
are
undamaged.
12.
Replace
all
parts
in
reverse
order.
Substitution
of
bulb
thermostat
LC3
1.
Wait
until
the
air
circulation
fan
has
stopped
running.
2.
Before
starting,
ensure
that
the
electrical
supply
is
turned
off
and
locked.
3.
Remove
the
service
panel
(see
‘removal
of
service
panel’).
4.
Remove
the
bracket
by
using
the
LC3.
5.
Disconnect
the
electrical
connections
on
the
bulb
thermostat.
6.
Remove
the
fixing
screws
connecting
the
bulb
thermostat
to
the
electrical
wiring
panel.
7.
The
whole
bulb
thermostat
is
now
loose
and
can
be
removed.
8.
Replace
all
parts
in
reverse
order.
Substitution
of
bulb
thermostat
LC1
1.
Remove
the
thermocouple
via
the
air
outlet
side
of
the
air
heater.
2.
Follow
the
above
instructions
No
6
to
8
for
the
bulb
thermostat
LC3.
Cleaning
&
substitution
of
burner
When
cleaning
and
re
‐
installing
the
burner,
it
is
necessary
to
make
use
of
a
kit
specially
designed
for
ULTRA/ULTRA
EC
units.
Use
only
kits
which
are
approved
by
the
manufacturer
and
which
are
appropriate
for
your
appliance.
Use
kit
number
36
25192
025
for
unit
ULTRA
(EC)
type
025
–
For
all
other
types,
use
kit
number
36
25192
035.
Always
consult
your
distributor
at
the
slightest
doubt.
