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Honeywell L4188A Manual page 8

Aquastat controllers
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TO SET TEMPERATURE
KNOB MODELS
Line
up the desired
temperature
setting
with
the
temperature
setting indicator
behind the knob.
SCREWDRIVER
SLOT MODELS
Line up the pointer
on the shaft with the desired
temperature
setting printed on the case.
TO SET ADJUSTABLE DIFFERENTIAL
(if provided)
Use a screwdriver
to turn the differential
dial until the
slot molded
into the case
lines
up with the desired
degres of differential.
'IG. 12-TWIST
THE SCREWDRIVER
SLIGHTLY
TO
TURN THE DIFFERENTIAL
DIAL.
TO SET TEMPERATURE
LIMIT STOP
(if provided)
Follow these tnstructions
carefully
to avold plac-
ing the limit stop pointer on the wrong side of the
setting
indicator.
In a high limit application,
in-
correct
positioning
of the
pointer
will
cause
system
operation
above
the
limit
stop
setting,
potentially
resulting
in overheating
or related
conditions.
Remove the knob.
Turn
the
controller
shaft
all the
way
counter-
clockwise
n
when setting a high limit. Turn it all
the way clockwise
n
when setting a low limit.
Find the metal limit stop on the back of the knob.
Lift the limit stop slightly with a pencil or screwdriver
and push to move to desired setting.
Read the setting from the front of the knob.
Place the knob on the shaft.
Turn the knob to make sure it:
(1) turns through the desired adjustment
range, and
(2) stops at the limit setting.
DO NOT FORCE.
Return knob to desired setting.
ADJUST LIMIT STOP
REPLACE KNOB ON SHAFT
-
0
FIG. 13-ADJUST
THE LIMIT STOP WITH A SCREW-
DRIVER AND CHECK ORIENTATION
WHEN
REPLACING KNOB ON SHAFT.
CHECKOUT
Turn the system on and observe
it through
several
cycles to make sure the controller
operates
as desired.
Honoywefl
Inc.
I
International Sales Dftices in all principal cities of the world. Manufacturing in Australia, Canada, Finland,
1065 Douglas Drive N.
France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan. United Kingdom. USA
Golden Valley, MN 55422-4386
PRINTED IN U.S.A.

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