Specifications

8.14.2.1
Change
of flow switch
stuffing box
Remove
complete
flow switch
as in 8.14.2.
Unscrew
retaining
screw
(S9)
and take off
the
micro switch
assembly.
Unscrew
adiustment
nut
(S10),
remove lever assembly,
remove
3
screws securing
top cover,
unscrew stuffing
box,
remove
both
rubber seals and
fit new
seals,
ensuring
washer
is fitted between
the
seals.
Reassemble
in reverse order
and adiust
lever assembly
of
the cold
flow
switch
as
follows:
Turn down
the adjustment
nut
(S10)
slowly
until
micro switch
closes the
red to brown
circuit and
make one
more complete
turn down.
8.14.2.2
Change of
thermostatic element
Unscrew
the 3 retaining screws
(S11)
and
remove
the housing
(S12).
Reassemble in
reverse order,
using
new washers.
8.14.2.3
Changing
internal seals
Remove housing as
in 8.1 4.2.2.
Bemove seals
R1
and
R2 and replace with
new
ones.
Do
not
use
any
jointing
compound or
grease.
8.14.3
Reassembling
Reassemble
in reverse order, using
new
wasners.
Check
-
earth continuity
-
PolaritY
-
resistance to earth
according
to INSTRUCTIONS
FOR BRITISH
GAS
MULTIMETER.
Note:
position
of notches on
plug
as shown.
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