Honeywell Aquastat L4006 Installation Manual page 9

Mount Immersion Well and Direct
2
Immersion Models (L4006A,B,C,E,G;
L4007A,B; L6006A,B; L6007A)
Installing Immersion Well Models
(L4006A,B,E,G; L4007A,B; L6006A; L6007A)
On an existing installation, 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
does not need to be replaced. T
To replace the well:
1. If the system is filled, drain the system to a point
below the boiler tapping.
2. Remove the old well from the boiler tapping..
3. Install the immersion well included with the
controller. If the boiler tapping is greater than
1/2 in. (13 mm), use a reduction fitting to adapt
the boiler opening to the 1/2 in. (13 mm) threads
that are standard with the well or fitting. Fittings
with 3/4 in. (19 mm) threads are also available.
4. Fill the system. Make sure that the well is
screwed intightly enough to prevent leakage. Do
not use the case as a handle to tighten the well
after the controller is secured to the well.
To install the controller:
1. Loosen the screw (at the top of the case, above
the scale setting), and remove the cover. Loosen
the two screws that secure the adapter clamp.
(See Fig. 6).
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.
NOTE: Some models include up to 3 in. (76 mm) extra
capillary tubing inside the case. In these models,
pull out the extra tubing, if needed.
2
M8806A
Fig. 6. Internal view of L6006A.
Install Direct Immersion Models (L4006C,
3
L6006B)
Models that provide for direct immersion of the
sensing element into the boiler include a bulb
compression fitting assembly instead of an
immersion well. Install the fitting in the boiler tap-
ping as follows:
1. Be sure the sealing washer is in place as
shown in Fig. 7. Make sure that the spud of
the bulb compression fitting is screwed in
tightly enough to prevent leaking.
ADAPTER
CLAMP
SPLIT SLEEVE
ADAPTER CLAMPS
FIT OVER
GROOVE
SENSING BULB
Fig. 7. Direct immersion model with fitting partially
7
Aquastat L4006,7,8;L6006,7,8
INSTALLATION
SETPOINT
INDICATING DIAL
DIFFERENTIAL
ADJUSTMENT
WHEEL
ADAPTER CLAMP
SCREWS
INSERTION
1
ELEMENT
1
WITH VERTICAL MOUNTING OF
IMMERSION WELL, ELEMENT IS
ATTACHED TO BOTTOM OF THE
CASE.
SELECT MODELS HAVE SCREW
2
TERMINAL, NOT TAB TERMINAL.
SEALING WASHER
BULB COMPRESSION
FITTING
removed.
60-2104—01
M8774B