Installation Guide
60-2104—01 8
MOUNTING
Mount Remote Bulb Models (L4008A,B,E;
L6008A,G,H)
The remote temperature-sensing bulb can either be
installed in an immersion well (See Fig. 8) that extends
into the boiler or tank, or it can be directly immersed in
the controlled medium (See Fig. 9). For installations that
do not use a well, secure the remote bulb with a bulb
compression fitting (See Fig. 10), or capillary compres-
sion fitting. (See Fig. 11).
Order well, well adapter, bulb compression fitting or
capillary compression fitting separately. See form no.
68-0040, Wells and Fittings for Temperature Controllers.
If used, well must snugly fit sensing bulb for the best
thermal response. Insert bulb until it rests against the
bottom of the well. Hold it there while tightening the tub-
ing clamp. (See Fig. 8).
The boiler manufacturer usually provides a tapping for
the insertion of the Aquastat Controller sensing ele-
ment. This
tapping should be located at a point where
typical water temperature can be measured. Never
locate the bulb or protecting immersion well close to a
hot or cold water inlet or a steam coil.
If the system is filled, drain system to a point below the
boiler tapping, or wherever the sensing bulb is to be
installed.
The bulb can also be installed in the supply line of an
indirect
water heater, in the direct water heater itself, or
in the feed riser, about 6 in. (153 mm) above the boiler.
If the riser is valved, the bulb can be installed between
the boiler and the valve.
NOTE: Do not make sharp bends or kinks in the
capillary. Make bends no sharper than 1
in. (25 mm) radius.
After installing the controller, carefully coil the excess
capillary at the bottom of the controller case.
1
M8777B
WELL
BULB
SPUD
MOUNTING
CLAMP
A
DRAW
NUT
TUBING
B
MOUNTING CLAMP
SCREWDRIVER
SPREAD JAWS
TO FIT OVER
RIDGE ON
WELL SPUD
JAWS
Fig. 8. Immersion well fitting..
Mount Immersion Well
1. Screw the well into the boiler, tank, or pipe
tapping.
2. Insert the bulb in the well, pushing the tubing
until the bulb bottoms in the well.
3. Attach the retainer clamp to the end of the
well spud. Loosen the draw nut and spread
the jaws of the clamp with the screwdriver if
necessary. (See Fig. 8).
4. With the retainer clamp attached to the well
spud (be sure the jaws of the clamp hook over
the ridge at the end of the spud, as shown
at points A in Fig. 8), adjust the tubing to fit
through the retainer clamp groove, as shown
at point B in Fig. 8..
5. Tighten the draw nut so that the retainer clamp
is firmly attached to the well spud and the
tubing is held securely in place
2
2. Insert the immersion sensing bulb through the bulb compression fitting. Adjust the adapter clamp so that the clamp fits
over the groove at the opening of the bulb compression fitting.
3. Tighten the adapter clamp screws so that the Aquastat Controller is firmly attached to the bulb copression fitting.
INSTALLATION