Specifications

6.4.2.1
Nominal
heating
inPut
The
pressure
must
be
as
follows:
intetbressure:20
mbar
(8.08
in'
WG)
main
burner
pressure
(cold
and
hot):
vcw
2011
vcw
2511
VCW-sine
18
9.0
mbar
(3.61
in.
WG)
9.0
mbar
(3.61
in.
WG)
10.6
mbar
(4.26
in.
wG)
The apoliance
is
regulated
at
factory
to
the
.b'ti"5i
neating
influt.
Therefore
it
is
not
n"lJ""urv
to a[6r
thb
setting
of
.input
or
output
"itne
g"d gouernor
during
installation'
1
pilot
adiustment
screw
2
pilot gas
filter
3
DC
solenoid
+ main
burner
Pressure
test
Point
5
gasgovenor
6
blocking
Plate
7
inLipti.irte
test
point
(near rear
plate)
6.4.3
Flue
Check
that
there
is
no
spillage
of
products,of
JomOustion
from
the
down
draught
diverter
by
carryinq
a
spillage
test
as
detalleo
In
t:D
il6'
i
r.
thppiicaote
only
to
open{lued
aooliances.)
Check
appearance
ol
llames
In
lii,irl"-"iihrtish
thatihere
is
adequate
air
for
LturitLn,
check
also
as
outlined
under
3'5'3
ii'tn"l"li
lriv
tvpe
of
extract
fan
fitted'
6.4.4
Flame
tailure
device
Check
the
operation
of
the
flame
failure
devic.e
"'"'ini
donoiuoiler
to
ensure
that
the
device
will
"iir,li
"tt
sit
to
the
main
burner
within
60
seconos.
6.4.5
Flow
thermostat
Check
the
flow
thermostat
and
all
automatic
Jontiofs
are
operating
satisfactorily'
Readjust
controls
to appropriate
settings.
6.5
Water
soundness
Allow
the
water
system
to
reach
maximum
woif<inq
temperatuie
and
examine
for
water
iornon""...
ihe system
should
then
be
turned
off
ind
rapidly
drained
while
still
hot'
The
water
iu.t".
should
again
be
filled
and
cleared
of
air
idcis.
Sealed
sistems
should
be
adjusted
to
the
initial
system
design
pressure
of
1,2bar'
Examine
for
water
soundness.
B
6.6
User's
instructions
Hand
the
instructions
for
use
to
the
user
for
l"T"niio"
unO
instruct
in
the
safe
operation.of
ii. aooriince.
Advise
the
user
of
the
oi"cauiibns
necessary
to
prevent
damage
to
ihe svstem
and
to
the
building
if
th-e
system
JoLJ'not
remain
operative
during
frost
con-
ditions.
Note:
Leave
installation
and
servicing
instructions
at
the
meter'
For
continued
efficient
and
safe
operation,
"iirt-viiiii"ni
ippliance
should
be
serviced
liLaiion"e
a'vear
bv
a
qualified
servicing
company'
It
is
important
and
strongly
re-comm.ended
that
ariangements
are
made
for
a
-!44!!!!9
ilt
cA-sr6ereLtwith
a
qualified
servicing
ififfiv
to ensure
regular
servicing'
24
Please
contact
your
senticing
company'
Vo-u-r
nearestVaillint
office
oryour
local
gas
region,
o
o
N
=
o
o
Fig.35