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Installation - Honeywell L4188A Manual

Aquastat controllers
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ACCESSORIES (order separately):
Capillary compression fittings.
Part No. 104484A: l/2
in. NPT spud.
Part No. 1044848: 314 in. NPT spud.
Immersion well. Pressure rating 255 psi [1760 kPa].
Part No. 45900409-0038:
l/2
in. BSPT spud,
1 in. insulation, 3-l /2 in. insertion.
Part
No. 45900409-0098:
l/2
in. NPT
spud,
l-l /2 in. insulation, 3 in. insertion.
Part
No. 45900409-0108:
3/4
in. NPT
spud,
l-1 /2 in. insulation, 3 in. insertion.
OPTIONAL SPECIFICATIONS
(specify when ordering):
l
Combination
screw
and l/4
in. male
quick-
connect terminals.
0 High or low limit stop (models with knob only).
0 Mounting bracket (remote bulb models only).
1
I
INSTALLATION
WHEN INSTALLING THIS PRODUCT.
. .
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced
service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
2. Terminal
connections
must be inside an en-
closure that meets local electrical codes.
LOCATION
The equipment
manufacturer
generally
provides a
tapping
for insertion
of the temperature
controller
sensing element
The tapping should be located at a
point where average system temperature will be mea-
sured. Never locate the sensing element close to a hot
or cold water inlet or a steam coil, or where the well's
pressure rating will be exceeded.
Turn off power and, if the system is filled, drain to a
point below the boiler tapping or wherever the sensing
element
is to be located.
If no tapping is provided,
prepare one, properly threaded, at the desired location.
If this is a remote bulb unit, the controller case can be
mounted in a panel or, with the optional bracket, on any
flat surface.
Choose a location within reach of the
sensing element. Allow for gradual bends and some
slack in the capillary.
MOUNT THE IMMERSION
WELL
1. Coat the well threads with a moderate amount of
pipe dope, leaving two end theads bare. Teflon tape
may also be used.
2. Screw the immersion well into the tapping and
tigthen securely.
3. Refill the system. Check for and correct any leaks.
"SE MODERATE
AMOUNT
OF PIPE COMPOUND
12.011
\
LEAVE
2 EN0
THREADS BARE
FIG. P-USE
GOOD
PIPING
PRACTICE
WHEN
IN-
STALLING IMMERSION
WELL.
TO INSTALL DIRECT MOUNT
CONTROLLER
1. Slide the sensing bulb all the way into the well. The
metal collar around the capillary should slip into the
well spud.
2. Line up the case so the setting indicator is on top.
3. Tighten
the setscrew
in the well spud snugly
against the metal collar.
CONTROLLER
w.03.
FIG. 3-THE
DIRECT
MOUNT
MODEL
IS HELD
Ih
PLACE
BY THE SETSCREW
IN THE WELL
SPUD.
TO MOUNT REMOTE BULB
CONTROLLER
INSERT SENSING BULB IN WELL
1. Slide sensing bulb into well. Make sure bulb rests
against the bottom of the well. Don't bend the capillary
where it connects to the bulb.
2. Hold bulb in place and tighten setscrew all the way
down. It won't fit tight against the capillary, but it will
keep the bulb from sliding out
CAPIL
FIG. 4-THE
SETSCREW
KEEPS THE REMOTE SEN-
SING BULB IN THE WELL.

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