Specifications

8.27 Change of thermo-magnet
Remove the
switch box as
outlined under
8.23.
Remove
micro-switch assembly
by unscrewing
the 2 retaining
screws
(88).
Skaighten
tap
washer
(B9),
unscrew retaining
nut
(B10), pull
out thermo-magnet
(B1
1) carefully.
Re-
assemble in reverse
order.
Check
-
earth
continuity
-
Polarity
-
resistance
to earth
according to INSTRUCTIONS
FOR BRITISH
GAS MULTIMETER.
Check connections for
gas
soundness.
8.28
To
open the
control box
lsolate the appliance
from the
electrical mains.
Open the main terminal
box
by removing
the
retaining
screw
(C1).Remove
the
four
retaining
screws
(C2).
Lift
up the switch
box and
pull
out slowly the
control box
cover complete
with the
switch
board,
printed
circuit and terminal
board. Pull
off the multiple
plugs
from
the
printed
circuit.
Reassemble the
box
in
reverse
order. When
replacing
the
screws,
position
the 2
star
washers
diagonally to the
screws.
8.29 Change of
main
swilch board
Take
off
the
switch board as
outlined under
8.28.
Disconnect
the mains
cable from the
terminals.
Unscrew the 2 retaining
screws
(C3)
and
remove the
p.c.b.
with the main
switch from
the crontrol box cover.
Reassemble in reverse
order.
Check
-
earth continuity
-
polarity
-
resistance to
earth
according to INSTRUCTIONS FOR
BRITISH
GAS
MULTIMETER,
<G>
.-
3
rig.
e6
<88
b
,z-4.
r( t-
"v4-
Fig.
BB
42