L8100A,B,C Aquastat
®
CONTROLLERS
60-2336—3
4
IMPORTANT
The controller immersion well is factory-installed to
the controller. Do not remove the immersion well,
this could damage the ECO switch.
쐃
If system is filled, drain to a point below the tapping.
쐇
Remove plug from tapping.
쐋
If tapping is suitable, carefully screw immersion well
into tapping. Do not tighten or apply force to the
controller case.
쐏
Fill tank. Make sure that well is screwed in tightly
enough to prevent leakage.
Mounting Remote Bulb (L8100B and L8100C)
The remote temperature sensing bulb is installed in an
immersion well (Fig. 4) or located near a capillary
compression fitting (Fig. 5) that extends into the upper portion
of the tank to prevent stacking.
Immersion Well Fitting
The immersion well must snugly fit the sensing bulb for good
thermal response. Install as follows:
쐃
Use tapping provided by tank manufacturer, if possible,
or select an area where typical water temperature is
best measured.
쐇
If tank is filled, drain to below point where bulb will be
installed.
쐋
Screw well into tank.
쐏
Insert bulb into well, pushing tubing until bulb bottoms
in well.
쐄
Attach mounting clamp end of well spud. Loosen draw
nut and spread jaws of clamp with screwdriver if
necessary.
쐂
With mounting clamp attached to well spud (make sure
jaws of clamp hook over ridge at end of spud, as shown
at points A in Fig. 4), adjust tubing to fit through
mounting clamp groove, as shown at point B in Fig. 4.
쐆
Tighten draw nut until mounting clamp is firmly attached
to well spud and tubing is held securely in place.
CAUTION
Do not secure draw nut so tightly that mounting clamp
collapses tubing.
Capillary Compression Fitting
쐃
Use tapping provided by manufacturer, if possible, or
select an area where typical water temperature is best
measured.
쐇
If tank is filled, drain to below point where bulb will be
installed.
쐋
Screw fitting into boiler tank tapping.
쐏
Place packing nut on tubing.
쐄
Slide bulb completely through fitting.
쐂
Place composition disk and four slotted brass washers
on tubing in order shown in Fig. 5.
Turn brass washers
so slots are 180 degrees apart.
쐆
Slide seal assembly into fitting and tighten packing nut.
M8777
WELL
BULB
SPUD
MOUNTING
CLAMP
A
DRAW
NUT
TUBING
B
INSERT— MOUNTING CLAMP
SCREWDRIVER
SPREAD JAWS
TO FIT OVER
RIDGE ON
WELL SPUD
JAWS
Fig. 4. Immersion well fitting for L8100 remote bulb.
COMPOSITION DISK
(SLOTTED)
BOILER PLUG
CAPILLARY TUBING
EXAMPLE OF SLOTTED WASHERS
ASSEMBLED
IN PAIRS:
PACKING NUT
M8816
IMMERSION
BULB
Fig. 5. Capillary compression fitting for
L8100 remote bulb.
Wiring
Disconnect power supply before installation to prevent
electrical shock or equipment damage. All wiring must comply
with local codes and ordinances regarding wire size, type of
insulation, enclosure, etc. Fig. 6 through 11 show typical
Powerpile® (millivolt) gas control connections; Fig. 12 and 13
show typical connections for 24 Vac systems; Fig. 14 through
16 show an L8100 hookup with an S86E,F,G, or H
Intermittent Pilot System.
Some four-terminal models are shipped with jumper in place
for use as three-terminal models. Remove jumper for four-
terminal operation.
