15
Mixing
Valve
Disassembly
Tools
required,
all
available
from
Armstrong
1. Socket
1-1/2"
2. Allen
key
5/32"
3. Allen
key
3/16"
4.
Allen key
1/4"
5. Open
end
wrench
1"
6. Assorted
flat
head
screwdrivers
Disassemble
the
mixing
valve
in
a
front
to
back
sequence.
Start
at
the
temperature
control
lever
and
work
towards
the
base.
1. Shut
off
the
steam
and
water
supplies.
2. Open
the
outlet
shut-off
valve
and
hose
nozzle
(if
equipped)
to
relieve
pressure.
3. Remove
the
temperature
regulating
lever
by
unscrewing
the
retaining
screw
and
washer
(these
items
may
have
been
previously
removed
if
temperature
setting
is
locked).
4. Remove
the
gland
plate
screws
and
gland
plate.
5. Sequentially
remove
the
six
retaining
screws
from
the
spring
loaded
bonnet.
Maintain
pressure
against
the
bonnet
while
disassembling.
6. Remove
the
bonnet
and
spindle
assembly.
7. Unscrew
the
spindle
in
a
clockwise
direction
and
remove
from
the
bonnet.
Caution:
Do
Not
twist
the
poppet
when
removing
or
damage
to
the
diaphragm
may
occur.
Note:
Replace
the
poppet
valve
and
spring
as
a
single
unit
when
damaged.
8. Carefully
push
out
the
gland
seal
packing.
9. Carefully
remove
the
spring
and
poppet
valve
from
body.
10. Using
a
1-1/2"
socket
remove
the
diffuser
and
gasket.
11. Inspect
the
condition
of
the
diffuser
seat
and
replace
if
damaged.
The
diffuser
may
be
de-scaled
using
a
commercial
inhibited
descalent.
This
completes
the
disassembly
of
the
upper
section
of
the
Mixing
Valve.
To
clean
or
inspect
the
lower
section
of
the
Mixing
Valve
or
if
the
Diaphragm
requires
replacement
continue
with
the
disassembly
procedure
in
the
next
section
(Diaphragm
Replacement).
Replace
worn
or
damaged
parts
as
required.
Always
replace
ìOî
rings
and
gaskets
with
new
ones
after
disassembly.
(Use
Service
Pack
#036-203-520.)
