95-5973—3
2
2.
Remove plug (or old well) from boiler tapping.
3.
Install the immersion well included with the control-
ler. If boiler tapping is greater than 1/2 in., use a reduction
fitting to adapt the boiler opening to the 1 in. threads that are
standard with the well or fitting. Fittings with 3/4 in. threads
are also available.
4.
Fill the system. Make sure that the well is screwed in
tightly enough to prevent leakage. Do
not
tighten after
controller is secured to well because of possible excessive
force on the case.
5.
Loosen screw (at top of case, above scale setting), and
remove cover. Loosen two screws that secure adapter clamp.
See Fig. 2.
6.
Insert the sensing element into the immersion well.
7.
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 element bulb must
bottom in the well.
Fig. 2—Internal view of L6006A,B (L6006C and
L6007 are similar in appearance).
INSTALLING SURFACE-MOUNTED
MODEL
(L6006C)
CA
UTION
•
D
o not replace immersion type Aquastat
®
Controller with strap-on Aquastat
®
Controller.
•
W
hen mounting the L6006C, do not secure
draw nut so tight that retainer clamp could
collapse tubing.
NOTE: When mounting the L6006C on piping, use 1 in.
(25.4 mm) diameter or larger pipe for accurate tempera-
ture sensing. Remove any insulation from the pipe. Thor-
oughly scrape off all scale, rust, or paint. Mount the
controller using the adjustable bracket furnished.
The L6006C is designed for surface mounting on piping
or tanks. Mount the L6006C directly on the tank surface
using the adjustable mounting bracket as shown in Fig. 4.
The control can be mounted in any position. (If mounting the
L6006C on piping, see NOTE above.)
WIRING
Disconnect power supply before connecting wiring to
prevent electrical shock or equipment damage. All wiring
must comply with local electrical codes and ordinances.
Fig. 5 and 6 show typical wiring diagrams of Aquastat
®
Controllers used in heating systems.
When the W terminal on the device being replaced is a
1/4 in. tab terminal, use the existing wiring harness terminals
to install the replacement device. When the W terminal on
the device being replaced is a screw terminal, connect the
provided wire harness adapter on the 1/4 in. tab terminal of
the replacement device. Connect the existing wire to the
adapter harness using the provided wire nut.
Operation
For proper selection of settings, follow the boiler manu-
facturer recommendations.
High limit controller
—shuts off burner when water tem-
perature exceeds high limit setting. Burner restarts
when temperature drops to high limit setting, less
differential.
Low limit controller
—maintains minimum boiler tem-
perature for domestic hot water. Turns on burner at
temperature setting, minus differential.
Circulator controller
—prevents circulation of water that
is not hot enough. Breaks circulator circuit at tempera-
ture setting minus differential; remakes the circuit
when the temperature setting is reached.
Switching action is as follows:
Upon a drop in boiler water temperature (to dial setting,
less differential), makes R to B burner contact; breaks R to W
contact, preventing circulator operation. Upon a rise in boiler
water temperature (to dial setting), breaks R to B burner
contact, makes R to W circulator contact.
M8806
SETPOINT
INDICATING DIAL
DIFFERENTIAL
ADJUSTMENT
WHEEL
ADAPTER CLAMP
SCREWS
INSERTION
ELEMENT
WITH VERTICAL MOUNTING OF IMMERSION WELL,
ELEMENT IS ATTACHED TO BOTTOM OF THE CASE.
SELECT MODELS HAVE SCREW TERMINAL, NOT TAB
TERMINAL.
1
2
2
1
INSTALLING DIRECT IMMERSION MODELS
(L6006B)
Install fitting in boiler tapping as follows:
1.
Be sure sealing washer is in place as shown in Fig. 3.
Make sure that spud of capsule compression fitting is screwed
in tightly enough to prevent leaking.
2.
Insert immersion bulb (sensing element) through cap-
sule compression fitting. Adjust the adapter clamp so that it
fits over the groove at the opening of the capsule compres-
sion fitting.
3.
Tighten adapter clamp screws so the Aquastat
®
Con-
troller is firmly attached to the capsule compression fitting.
1
95-5973—3
J.
H. • Rev. 1-95 • ©Honeywell Inc. 1995 • Form Number 95-5973—3
L6006 and L6007
Aquastat
®
Contr
ollers
Installation Instructions for the Trained Service Technician.
A
pplication
These Aquastat
®
Controllers operate in response to tem-
perature changes in hydronic heating systems. They provide
spdt switching for three-wire applications.
The L6006A,B, and L6007A combine low or high limit
and circulator control; L6006C combines circulator control
with low and high limit.
The L6006A,B are for horizontal insertion; the A model
uses an immersion well; the B model uses a capsule com-
pression fitting for direct immersion. The L6006C is for
horizontal or vertical surface mounting. The L6007A is for
horizontal or vertical insertion using an immersion well.
If immersion well or capsule compression fitting must be
ordered, refer to form 68-0040, Wells and Fittings for Tem-
perature Controllers, for part numbers and ordering informa-
tion.
ELECTRICAL RATINGS (A):
IMPORTANT:
Controller can be used with or without
immersion well. If used, well must snugly fit sensing
bulb for good thermal response. Bulb should be in-
serted until it rests against bottom of well, and then
held there while the tubing clamp is tightened.
NOTE: Some models have an adjustable tubing length to 3
in. (76 mm). In these models, extra tubing inside the case
can be pulled out, if needed. See Fig. 1.
The manufacturer usually provides a tapping for insertion
of the controller sensing element. This tapping is located at a
point where typical water temperature can be measured.
Depending on model, the element is inserted in an immer-
sion well or directly immersed through a capsule compres-
sion fitting.
Follow the instructions furnished by the system manufac-
turer, if available; otherwise, refer to the appropriate follow-
ing procedure.
Fig. 1—Adjusting the capillary length.
Installation
WHEN INSTALLING THIS PRODUCT...
1.
Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous condi-
tion.
2.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your applica-
tion.
3.
Installer must be a trained, experienced service techni-
cian.
4.
After installation is complete, check out product op-
eration as provided in these instructions.
W
ARNING
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY OR DEATH.
This product is intended for use only in systems
with a pressure relief valve.
CA
UTION
Disconnect power supply before connecting wir-
ing to prevent electrical shock or equipment
damage.
l20 Vac
240
Vac
Full Load
8
5
.1
L
o
ck
ed
R
o
to
r
4
8
30.6
Inductive Current
0.25 at 1/4 to 12 Vdc
M8882
SENSING ELEMENT IS FACTORY FORMED FOR 1.5 INCH
INSULATION WELL ASSEMBLIES.
FOR 3 INCH INSULATION WELL ASSEMBLIES, PULL OUT
SUFFICENT CAPILLARY TO ASSURE THAT THE CAPSULE
BOTTOMS IN THE WELL.
STRAIGHTEN CAPILLARY SUFFICENTLY SO IT DOES NOT
INTERFERE WITH INSERTING THE CAPSULE INTO THE WELL.
CAUTION:
EXCESSIVE HANDLING OR SHARP BENDS
CAN DAMAGE THE CAPILLARY.
1
2
3
1
2
3
INSTALLING IMMERSION WELL MODELS
(L6006A, L6007A)
On existing installation, shut off the power and remove
the old control. If the old immersion well appears suitable,
and the adapter clamp on the Aquastat
®
Controller fits the
old well spud, do not replace.
1.
If the system is filled, drain system to a point below the
boiler tapping.
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