L4031A,C
Pool Heater Aquastat® Controller
PRODUCT DATA
FEATURES
•
•
Pool control regulates pool water temperature.
L4031A pool side control is ambient-temperature
compensated so changes in air temperature do not
affect water temperature.
•
High limit provides shutdown protection to prevent
boiler overheating.
•
•
•
L4031A provides automatic high limit reset.
L4031C requires manual high limit reset.
Each limit control has its own remote-bulb sensing
element and snap switch for system control.
GENERAL
The L4031A,C Pool Heater Aquastat® units are designed to
control pool water temperatures and provide high limit boiler
control.
Contents
General ...............................................................................
Features ..............................................................................
Specifications ......................................................................
Ordering Information ...........................................................
Installation ...........................................................................
Setting and Checkout..........................................................
Material Safety Data Sheets ...............................................
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Copyright © 1995 Honeywell Inc.
•
All Rights Reserved
60-2107-5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
Optional Specifications:
When Installing this Product…
L4031A:
ᕡ Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
— Pool control dial marked WARMER-COOLER.
— High limit capillary exiting from top or bottom of case.
— Pool control range: 53°F to 107°F (12°C to 42°C),
100°F to 240°F (38°C to 116°C).
— Factory-set pool control limits set at 115°F, 180°F, and
200°F (46°C, 82°C, and 93°C).
— 5°F (3°C) differential on pool control.
— Adjustable differential on high limit control.
— Factory high limit stops set at 140°F, 145°F, 180°F,
195°F, 200°F, and 210°F (60°C, 63°C, 82°C, 91°C,
93°C, and 99°C).
ᕢ Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
ᕣ Installer must be a trained, experienced service
technician.
ᕤ After installation is complete, check out product
operation as provided in these instructions.
— Capillary lengths available at 16-1/2 (high limit only),
18, 30 (pool control only), 33, 40, and 96 in. (419, 457,
762, 838, 1016, and 2438 mm).
— Case marked “Tankstat.”
— No openings in cover.
CAUTION
Disconnect power supply before beginning installation
to prevent electrical shock or equipment damage.
— Less dial stops on pool control or both sides.
— No opening over high limit dial.
— With adjusting knob on pool control; less jumper.
The L4031 can be mounted either vertically or horizontally on
a wall or panel, or directly on a tank. This device can be
installed with the case and bulbs as far apart as the tubing
permits. In all cases, the equipment manufacturer directions
should be followed, if available. If not, follow the general
instructions in the Location section.
L4031C:
— Factory high limit stop set at 250°F (121°C).
NOTE: Not all combinations of options are available. For
information, contact your Honeywell Sales
Location
Representative or TRADELINE® Dealer.
1. Locate the high limit bulb in the hot water outlet header
of the heater. Locate the pool control bulb in the return
water header of the heater.
2. Uncoil no more tubing than needed. Sharp or repeated
bending of the tubing can cause damage.
3. If the tubing is subjected to vibration, protect it against
wear when it comes in contact with another surface.
SIDE VIEW
FRONT VIEW
3/8 (10) DIA.
11/16
(17)
Mounting
4-1/2
(114)
1. Remove the cover by loosening the cover screw on the
lower front of the controller.
5-7/8
(149)
2. Fasten the case to a convenient wall or panel with
screws through the three mounting holes in the back of
the case.
3. Replace cover.
To Install Remote Bulb (Order Fittings or
Wells Separately)
2-1/4 (57)
3-3/8 (86)
4-1/8 (105)
NOTE: Bulb must be bottomed in well for correct response.
M4537
Fig. 1. Dimensions of L4031 in in. (mm).
Using Bulb Compression Fitting (Fig. 2)
1. Screw the fitting into boiler or pipe tapping.
2. Slide sealing washer onto bulb.
3. Insert bulb into boiler fitting until bulb bottoms.
4. Slide split sleeve into fitting.
5. Place clamps A and B on assembly so sleeve is drawn
into fitting when screws are tightened.
INSTALLATION
WARNING
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY OR DEATH.
NOTE: Make sure that nub on clamp A engages space
between sleeve and clamp.
This product is intended for use only in systems with a
pressure relief valve.
6. Tighten clamp screws evenly.
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
CLAMP B
CLAMP SCREWS (2)
CLAMP A
BULB
BULB
COMPRESSION
FITTING
SEALING
WASHER
JAWS
SPREAD JAWS
TO FIT OVER
RIDGE ON SPUD
OF WELL
INSERTION LENGTH
APPROX. 3-3/16 in. (81 mm)
SCREWDRIVER
SPLIT SLEEVE
M8815
INSERT— MOUNTING CLAMP
Fig. 2. 104486 Bulb compression fitting.
DRAW
NUT
MOUNTING
CLAMP
SPUD
WELL
Using Capillary Compression Fitting (Fig. 3)
BULB
B
1. Screw fitting into boiler or pipe tapping.
2. Place packing nut on tubing.
3. Slide bulb completely through fitting.
4. Place composition disk and four slotted brass washers
on tubing in the order shown in Fig. 3. Turn brass
washers so that slots are 180 degrees apart.
5. Slide seal assembly into fitting and tighten packing nut.
TUBING
M8777
A
Fig. 4. Immersion well fitting.
IMMERSION
BULB
Wiring
BOILER PLUG
All wiring must comply with local codes and ordinances.
CAPILLARY TUBING
In all installations, follow the equipment manufacturer
instructions. If not available, use hookups in Figs. 5, and 6.
COMPOSITION DISK
(SLOTTED)
L4031 POOL HEATER
AQUASTAT® CONTROLLER
POOL
CONTROL
HIGH
LIMIT
EXAMPLE OF SLOTTED WASHERS
ASSEMBLED
REVERSE-ACTING
PRESSURE
IN PAIRS:
GAS VALVE
PACKING NUT
M8816
PILOTSTAT
CONTOLLER
2
Fig. 3. 104484 Capillary compression fitting.
PUMP
Using Immersion Well (Fig. 4)
1. Screw the well into the boiler or pipe tapping.
2. Insert the bulb into the well, pushing the tubing until the
bulb bottoms in the well.
HEATING
SWITCH
PUMP
SWITCH
1
3. Attach the retainer clamp to the end of the well spud.
Loosen the draw nut and spread the jaws of the clamp
with a screwdriver if necessary. See Fig. 4.
L1
(HOT)
L2
4. With the retainer clamp attached to a well spud (be
sure jaws of clamp hook over the ridge at the end of the
spud, as shown at point A), adjust tubing to fit through
retainer clamp groove, as shown at point B.
5. Tighten draw nut so retainer clamp is firmly attached to
well spud and tubing is held securely in place.
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
WHEN HIGH LIMIT AND POOL CONTROL ARE CONNECTED IN
SERIES, CURRENT DRAW OF CIRCUIT MUST NOT EXCEED
ELECTRICAL RATING OF POOL CONTROL.
M4539
Fig. 5.Typical L4031 connection providing pool
temperature control and high limit protection.
CAUTION
Do not secure draw nut so tightly that retainer clamp
could collapse tubing
60-2107—5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
L4031 POOL HEATER
AQUASTAT® CONTROLLER
Checkout
POOL
CONTROL
HIGH
LIMIT
WARNING
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY OR DEATH.
GAS BURNER CONTROL
PP PP TH1 TH2
This product is intended for use only in systems with a
pressure relieve valve.
Always conduct a thorough checkout when the installation is
complete. Make sure the controller was installed and adjusted
properly by putting it into operation and observing at least one
complete cycle. Further adjustment can then be made to
provide for more exact requirements.
POWERPILE®
GENERATOR
REVERSE-ACTING
PRESSURE CONTOLLER
M4538
Fig. 6.Typical L4031 connection in a
self-generating gas system.
POOL CONTROL
POINT SETTING
SCREW
SETTING AND CHECKOUT
HIGH LIMIT
CONTROL POINT
SETTING SCREW
Setting
To set the control point of each control, insert a screwdriver in
the slotted head visible through the cover, and turn the dial of
each control to the desired setting (Fig. 7).
M4540
Because systems differ, the correct setting for one system
may not apply to another. In all cases, the equipment manu-
facturer recommendations for setting should be followed.
Fig. 7. Internal closeup view of L4031A pool heater
Aquastat® Controller setting screws.
5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
1-888-809-3787
60-2107—5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
1-888-809-3787
60-2107—5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
9
60-2107—5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
60-2107—5
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L4031A,C POOL HEATER AQUASTAT® CONTROLLER
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60-2107—5
Home and Building Control
Honeywell Inc.
Honeywell Plaza
Home and Building Control
Honeywell Limited-Honeywell Limitée
740 Ellesmere Road
Helping You Control Your World
P.O. Box 524
Scarborough, Ontario
QUALITY IS KEY
Minneapolis, MN 55408-0524
M1P 2V9
60-2107—5 J. H. Rev. 5-95 Printed in U.S.A.
customer.honeywell.com
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