L4006,L4007 AQUASTAT CONTROLLERS
95-6120B—05
2
Installing the Immersion Well
On existing installations, shut off the power and remove
the old control. If the old immersion well appears
suitable, and if the adapter clamp on the Aquastat
controller fits the old well spud, this well need not be
replaced.
To install new well:
1.
If the system is filled, drain system to a point below
the boiler tapping.
2.
Remove old well from boiler tapping.
3.
Install the immersion well. Both 1/2 and 3/4 inch x
14 NPT wells are available. Depending on size of
boiler tapping and model ordered, a reducer fitting
may be required.
4.
Fill the system. Make sure that the well is screwed
in tightly enough to prevent leakage. Do NOT use
the case as a handle to tighten well after controller
is secured to well.
Fig. 1. Internal view showing L4006 (model with
horizontal well).
For Installation of Sensing Bulb in
Immersion Well
1.
Loosen screw (at top of case, above scale setting),
and remove cover. Loosen 2 screws that secure
adapter clamp. See Fig. 1.
2.
Insert the sensing element into the immersion well.
3.
Fasten the case of the Aquastat controller to the
well with the adapter clamp. Make certain that the
clamp is properly positioned over the groove of the
well spud. Also be sure the flange at the opening of
the well fits snugly into the opening of the case.
The sensing bulb must bottom in the well for best
temperature response.
Fig. 2. Mounting bracket placement for vertical or
horizontal mounting.
M38421
SETPOINT
INDICATING DIAL
DIFFERENTIAL
ADJUSTMENT
WHEEL
ADAPTER CLAMP
SCREWS
IMMERSION
WELL
MODELS WITH FIXED DIFFERENBTIALS DO NOT INCLUDE
ADJUSTING WHEEL.
VERTICALLY MOUNTED IMMERSION WELL IS ATTACHED
TO THE BOTTOM OF THE CASE.
L4006G INCLUDES TWO SPST SWITCHES.
1
2
1
2
SPST
SWITCH
3
3
M38422
VERTICAL MOUNTING
HORIZONTAL MOUNTING
