Glow-worm ASCOT 1.4S - Page 13

6.6
Thermocouple
Rcmovs
lront
casc
as
Section
6.
l.
Rcmovc
rhe
scaling
platcs
hcld
in
placc
by rhc two
N'15
scrctvs,
scc diagram
15.
\\/ithdraw
thermocouplc
lrom
rhc pilot
assembly.
This
is
bcst
achievcd
by
pulling
rhc
rhermocouplc
from
undersidc
of
basc.
Withdrau,
the
thermocouple.
Repl:ce
in reverse
ordcr
ensuring
frat
rhe
scaling
plates
seal
correctly
ancl
that
thc
rhermocouole
connection
is providing
a
good
contact.
Note.
A
quarrer
turn
beyond
finger
tight
is
sufficien
r.
6.7
Spark
Electrode
Rcmove
rhe
pilot
assernbll,
as
Secrion
6.5.
undo
r\.13
scrc\\,
sccuring
the
spark elecrocle
to
pilot
assembly
bracket.
Rcplacc
in
reverse
order
cnsuring
that
the
gap
bclu,ecn
the
spark
elecrodc
and
pilot
burncr
as
shorvn
in
diagram
13.
6.8
Piezo
Unit
Rcmovc
control
ray
b1,
pulling
foru,ard
and
disengaging,
scc
diagram
14.
Rcmove
ignirion
lcad
from rcar
o[
piczo
unit,
scc
diagram
19.
Rcmovc
thc M5
scrcw
sccuring thc piczo
button
rctaincr.
Rcmovc piczo
button and
unscrcrv
piczo
unit.
Rcplace
in revcrsc
ordcr.
6.9
Pilot
Filter
Rcmove
conrrol rray
by
pulling
forward
and
discngaging,
see
diagram
14.
DisconnecI
rhc
pilor
supply,
tubc
at
conncction
to
main
gas
control
unit and
withdraw
thc
tubc. scc
diagram
19.
Rclcase
the
pilot
filrcr
cap,
notc
posirion
ol
scaling
washcr.
Rcmovc
filrcr
and
scaling
s,ashcr
from
housing,
rcneu,
thc
filtcr
and
scaling
lvashcr.
Rcplace
in
rcvcrsc
ordcr.
6.10
Main
Gas
Control
Unit
Removc
conlrol
tra;,
by'
pulling
fonvard
and
discntaqinc,
sce diagram
14.
Turn
thc
gas
:crvicc
cock
ol'l', scc
diasrarn
19.
DisconnccI
rhc
pilor
l'ccd
rubc
a[ connccrion
[o
lnain
qas
control
unit.
PIEZO
RETAI
BUTTON
:'* \
PILOT
SUPPLY
TUBE CONNECTION
M5
SCREW
N
PILOT
CONNECTOR
(FTLTER
CAP)
GAS
FEEDTUBE
UNION
NUT
PILOT
FILTER
HOUSING
,/
M5
scREW
,/
/
,^r^*ocouPLE
UNION
NUT
/
cAs
rNLET
TAIL
\
I
\,\
\u,,
IGNITION
LEAD
B
LACK
MAIN
GAS
CONTROL
UNIT
M5
SCREW
./-Z ll \
|
tsr
I
rull\
|
ufe':il'.IY,l''#
s
5
0
s
l'
o
N
)
(JAs
rhEs5ufit
TEST
POINT
MAIN
GAS
rtLttH
UNION
NUT
M5
SCREW
(2)
OPERATING LEVER
GAS
INLET
GAS
INLET
TUBE
l)irnrrr:r 1
(.)
'-'-':,'""' '-'