Operating instructions

l-
.500 112.71
MÆ(.
PANEL
TI-IICKNESS
350 8el
2.s31 163.3)
+6-32
TERi¿
SCBEW
NATIONAL AND LOCAL
WIRING
CODES.
MAXIMUM
RECOMMENDED WIRE SIZE
IS
#14 AWG.
Switch
Settings
On dual
switch
units, both switches are
factory
set to actuate
together within
5% of
range
(switch
No. 2
set on
dial) but
may
be set to actu-
ate
up
to
'100%
of scale range apart. Either
switch may be set to agree
with the dial.
See
Part ll-Adjustments.
Start-Up
Process
Turn dial and knob to the desired temperature
setting. Controller
is ready for
operation, Minor
adjustments may be necessary to obtain better
set
point
accuracy
after
installing
the
unit
in
a
particular process.
See Part ll-Adjustments.
Part ll
-
Adiustments
Tools Needed
1/16" Allen wrench
Small screwdriver
f@l
'.
rHE uNrr
rs BErNc usED
ro coN-
v
ÍRor-
A PRocESS,
PERFoRM oALIBRA-
TION
TEST AFTER
ADJUSTMENT.
UNIT MUST
REPEAT ON SUCCESSIVE
ON.OFF CYCLES.
Test Thermometer
Use
añ accurate
test
thermometer
(such
as a
thermocouple)
with
its sensing area
located next
to
the sensing
bulb.
Stabilization
Before
making
adjustments
allow 5 minutes
for
the
thermãl
system
to adjust to the
bath
temperature.
Set Point
Reference
eonnect
test
lights to
the
terminals
to indicate
switch
operation.
Adjusting
Single
Switch
Tyþes
E55 and
E55S
F
L
2
55 Series
controllers are standardly
supplied
with
the
No.
2
(higher
temperature) switch
set
to
the dial.
To
adjust switch
settings
for
these
controllers,
follow
the
recalibration
procedure.
Set
the dial to the same temperature
as the
test
bath.
Using
1/16" allen
head wrench,
loosen
knob set screw
and
remove
dial, taking
care
not
to rotate the shatt.
Adjusting Dual
Switch
Types E55A
and
E55AS
.500
{12,
MAX,
PANEL
THICKNES S
+6-02 TÊRVL SCRFW
l-
350 88.9)
2.s31
163.3)
Shaft
has calibrated
flat for
easy
dial
replace-
ment. Using
1/16"
allen
wrench,
turn zero
adjustment,
located inside
adjustment shaft,
until
switch
No. 2 actuates. Turn counter
clock-
wise
for higher setting,
clockwise for lower
set-
ting.
Replace
dial on shaft.
Do
not
secure.
Turn dial
to a
higher setting
equal to temperature
differen-
tial
('F
or
'C)
desired
between
switches
No. 1
and
No. 2.
Remove
dial for access to
the No.
1
switch
adjustment
screw.
Using
a small screw-
driver
turn
in
or
out the
No.
1 switch adjustment
screw
(accessible
through opening behind dial).
Replace
dial,
tighten dial set
screw
to calibrated
flat. Controller
is ready for operation.
For single
switeh
units
the
only
adjustment
needed
is the
set screw adjustment in
the
middle
of the
adjacent
shaft.
Part
lll
-
Replacements
Tools Needed
1/16" Allen wrench
Small screwdriver
läù orscoNNEcr ELEcTRTcAL suppLy
S2 so
rHAT swrrcH
coNTAcrs AND
TERMINALS
ARE NOT ALIVE, REPLACE
WITH IDENTICAL
SWITCHES
CNLY.
Enclosed
Types
Remove
cover and
adjustment
dial;
then
remove
two
(2)
flat head screws
to
dismount
control
body
from enclosure. Remove
the large
rectangular
cover
plate
and rubber
gasket
from
the
bottom
of
the enclosure,
and
disconnect
wiring from
the
switch terminals.
lnsert the new
switch(es)
and
tighten screws,
Recalibrate set-
!