Glow-worm ASCOT 1.4S - Page 14

Disconnect. the thermocouplc
nut. from
rear
of
main
gas
control
unit.
Disconnect
the ignition lead
from
thc rear
of
piezo
unit.
Remove
thc
M5 scrcw sccuring
the
piezo
button
rctainer. Pull
oif
all knobs.
Remove
lhe four M5
scrcws
to releasc
clamping
plates
from
both ends of high
and
low
pressure
tubes,
see diagram 20 and2l
. Remove
tubcs
and
examinc
"O"
ring
seals, renewing
if
necessary.
Disconnect
the
gas
inlet
union nut.
at control and at
gas
service cock,
see diagram
19. Remove the
gas
inlet.
[ube, raking
care not
to damagc main
gas
filter.
Disconnect
the
gas
feed
tube
union nut
at conlrol
and removc
the two
M5
screws at automatic
valve
gas
feed
flange
connection
then
remove rhe
tubc.
The
main
gas
conuol
unit can nou,
be removed,
by
removing
the
lwo M5
screws
securing it
to the
bracket.
Replace in
reverse
order.
6.11 Electro-magnet
Unit
Remove
the main
gas
control
unit.
as in
Section
6.10.
Remove
two M5
screws
securing
the
operating lever
to thc
body
of the
gas
con[rol
unir,
see
inset
in
diagram i9
and remove
the
operaring lever.
Remove
single NI5
screw
on the.top
and rhe four
N'15
scrcws on the end.
Carefully
pull
magnet
unit clear
of
housing.
Replace in reverse
order.
6.12 Gas Filter
Remove
control
uay
by
pulling
forrvard
and
disenga_eing,
see diagram
14.
Turn the
gas
service
cock off.
Undo
M5 screws
to
rclease
clamping
plates
from
both
ends of
high and
low
prcssure tubes,
sce
diagrams
20
au;,d21.
Remove tubcs
and
examinc
the
"O"
ring
seals,
renew
if necessary.
Release unions securing
gas
inlet tube
to thc
main
gas
control
unit and scrvice
cock, see
diagram
19.
Remove thc tube. Examine
"O" ring
seal
and
rcnew i[
necessary.
Withdraw thc
main
gas
filtcr. Clean
or
renew as
necessary.
Rcplace
in reverse
order.
6.13 Summer/Winter
Control
Remove the conuols
tray by
pulling
forwards and
disengaging,
see diagram
14.
Turn the
water
service
cock off
and drain
the
heater at the drain screw,
see diagram
20. Examine
drain
plug
seal and
renew
if necessary.
Pull the summer/winter
knob from shaft.
Disconnect the
summer/winter
control
connection
and carefully
withdraw the summer/rvinter
assembly.
Examine
"O"
ring
seal,
renew il
necessary.
Reassemble
in
the
reverse order
ensuring
that the
summer/winter
knob
is
correctly
aligned
with
the
shaft before
pushing
into
position.
The
knob
should bc
positioned
so that
with
the shafi turned
fully anticlockwise
the
knob
points
towards the
word
"WINTER"
on
the controls
cover.
\\'hen
the
knob is turned
fully clockwise
it
will
point
tou'ards
the
word
"SUMlvlER".
6.14
Water Filter
Remove the conuols
tray by
pulling
fcr*'ards end
disengagin:, see
diagram
14.
Turn the
\\.rr^r
service
cock off
and drain the
heater at thc ciraiir screw,
see diagram
20.
Examine drain
plug
.eal
and renew
if necessrr\'.
IVATER
FILTER
SUMMER/
WINTER
CONTROL
CO N N ECTION
CLAMPING PLATE
PRESSURE
TUBE
WASFJES
SL,f\1l,lEF
,
\TINTER
X NOB
WATER
SERVICE COCK
WATEB
INLET
TAIL
AIN
SCREW
O
N/OFF
(sHowN
oFF)
206.{ 16
1A