Honeywell L4006B Thermostat User Manual

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L4006A,B,E,H  
Aquastat® Controllers  
INSTALLATION INSTRUCTIONS  
3
.
.
Installer must be a trained, experienced service  
technician.  
After installation is complete, check out product  
operation as provided in these instructions.  
APPLICATION  
4
These boiler-mounted, immersion type controllers  
operate in response to temperature changes in hydronic  
heating systems.  
WARNING  
Can cause serious injury, death or equipment  
damage.  
Disconnect the power supply before beginning  
installation to prevent electrical shock or  
equipment damage.  
L4006A breaks the circuit on a temperature rise to the  
control setting. It is used for high limit or low limit control.  
When used as a controller or as a low limit, a separate  
high limit must be used.  
Electrical Shock Hazard.  
L4006B makes the circuit on a temperature rise. It is  
used as a circulator controller, delaying circulator  
operation when boiler water temperature is below the  
control setting.  
Installing Immersion Well Models  
(L4006A,B,E)  
L4006E,H includes a trip-free manual reset switch.  
These models are designed to break the control circuit  
whenever the temperature of the controlled medium  
reaches the high limit setting. A reset button on the front  
of the case must be pressed to re-establish the control  
circuit. L4006H also includes bracket and clamp for  
surface mounting on pipe or tank.  
IMPORTANT  
Obtain the best thermal response with a well  
that snugly fits the sensing bulb. The bulb  
should be inserted until it rests against the  
bottom of the well. Use a well of correct length  
and bend the tubing, if necessary, to provide  
enough force to hold the bulb against the  
bottom of the well. Do not make a sharp bend in  
the tubing. A sharp bend can produce a break in  
the tubing and cause a loss of fill. This condition  
will cause the high and low limit controls to be  
made continuously.  
A plastic bag of heat-conductive compound is included  
with the L4006A,B,E Aquastat® Controllers for use when  
the sensing bulb is inserted into a well designed for a  
large bulb than the one used on the L4006A,B,E. A  
1
24904 Well Adapter, for use on old wells that do not fit  
the L4006A,B,E immersion well clamp, can be ordered;  
see form 68-0040, Wells and Fittings for Temperature  
Controllers. A setting stop is included to prevent setting  
above a desired temperature on limit.  
If the well is not a snug fit on the bulb, use the  
heat-conductive compound as follows. Fold the  
plastic bag of compound lengthwise and twist  
gently. Snip the end of the bag and insert into  
the well. Slowly pull out the bag while squeezing  
firmly to distribute the compound evenly in the  
well. Insert the bulb into the well. Bend the  
tubing, if necessary, to provide force to hold the  
bulb against the bottom of the well and to hold  
the out end of the bulb in firm contact with the  
side of the well. Wipe off any excess compound.  
If a well adapter or other accessories are needed, refer to  
form 68-0040, Wells and Fittings for Temperature  
Controllers, for part numbers and ordering information.  
INSTALLATION  
When Installing This Product…  
1
.
.
Read these instructions carefully. Failure to follow  
them could damage the product or cause a  
hazardous condition.  
Check the ratings given in the instructions and on  
the product to make sure the product is suitable for  
your application.  
NOTE: Some models have an adjustable capillary  
tubing length to 3 inches (76 mm). In these  
models, pull out extra tubing from inside the  
case, if needed.  
2
Follow the boiler manufacturer instructions, if available;  
otherwise, proceed as follows.  
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
1
2
.
.
Remove the old control.  
Refer to the cover insert of the old control to identify  
and tag each lead as it is disconnected.  
Leave the old well in place if it is suitable.  
3.  
SETPOINT  
INDICATING DIAL  
If Well is Otherwise Suitable But Does Not Fit The  
L4006 Immersion Well Clamp  
Use a 124904 Well Adapter (order separately, see form  
6
8-0040) to secure the L4006 to the old well. The adapter  
DIFFERENTIAL  
ADJUSTMENT  
WHEEL  
1
has a flange at one end for fastening the L4066 adapter  
clamp.  
ADAPTER CLAMP  
SCREWS  
1.  
2.  
3.  
Loosen, but do not remove, the two adapter clamp  
screws (see Fig. 1).  
Slide the adapter onto the capillary and short tube;  
see Fig. 2 inset.  
Make sure the flanged end of the adapter fits into  
the hole in the case. Position the adapter well clamp  
snugly over the flange on the adapter, then tighten  
the clamp screws.  
IMMERSION  
WELL  
2
4
.
.
Insert the bulb into the well, as shown in Fig. 2. If  
necessary, use the heat-conductive compound as  
instructed in the IMPORTANT statement on page 1.  
Tighten the setscrew (if one is present in the old  
well spud) against the adapter.  
1
2
MODELS WITH FIXED DIFFERENBTIALS DO NOT INCLUDE  
ADJUSTING WHEEL.  
VERTICALLY MOUNTED IMMERSION WELL IS ATTACHED  
5
TO THE BOTTOM OF THE CASE.  
M4679  
Fig. 1. Internal view of L4006A,B with horizontal well.  
L4006E is the same with reset button added.  
ADAPTER  
CLAMP  
BACK OF  
CASE  
ADAPTER  
CONTROLLER  
CASE  
BOILER  
ADAPTER  
CLAMP  
IMMERSION  
WELL SPUD  
1
ADAPTER  
OLD IMMERSION  
WELL ASSEMBLY  
SENSING  
BULB  
(A)  
(C)  
(D)  
(B)  
2
HEAT-CONDUCTIVE COMPOUND  
CAPILLARY  
TUBE  
SETSCREW  
SHORT TUBE  
FITS IN CENTRAL  
RECESS OF  
ADAPTER  
1
2
SLIGHTLY BEND IN TUBES SHOULD HOLD BULB IN GOOD THERMAL CONTACT WITH THE WELL AT TWO OPPOSITE POINTS, AS IN (A) AND (B).  
ASSURE THAT TUBES FIT FREELY IN ADAPTER SO THAT TENSION OF THE CAPILLARY TUBE AT POINT (C)  
HOLDS THE SENSING BULB IN GOOD THERMAL CONTACT WITH THE BOTTOM OF WELL AT POINT (D).  
M4678  
Fig. 2. Bulb in immersion well and use of adapter.  
If the Old Well Is Unsuitable.  
4. Loosen, but do not remove, the two adapter clamp  
screws (Fig. 1).  
1.  
.
Drain the system and remove the well.  
Select a new well from form 68-0040 (order well  
separately).  
5
.
Insert the sensing bulb into the well until it bottoms  
as show in Fig. 2. Add heat-conductive compound,  
if necessary, as instructed in the IMPORTANT  
statement on page 1.  
2
3.  
Install the new well, refill the system and check for  
leaks.  
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
6.  
Make sure the end of the well fits into the hole in the  
case. Position the immersion well clamp snugly  
over the well flange and tighten the clamp screw  
securely.  
ENCLOSED  
SENSING BULB  
PIPE  
Mounting Surface Mount Model (L4006H)  
The L4006H is designed for surface mounting on piping or  
tank and can be mounted in any position.  
1
2 IN.  
ADJUSTABLE  
PIPE  
STRAP  
When mounting the L4006H on piping, the pipe should be  
MOUNTING  
BRACKET  
1
in. (25 mm) diameter or larger for accurate temperature  
sensing.  
1.  
2.  
3.  
Remove any insulation from the pipe.  
Thoroughly scrape off all scale, rust or paint.  
Mount controller as shown in Fig. 3 using adjustable  
12 in. (294 mm) pipe strap furnished.  
When mounting the L4006H on a tank, use a pipe strap of  
appropriate length, approximately 6-10 ft (17.6- 29.4m) for  
the tank (not provided). Fit the pipe strap through the slot  
in the mounting bracket. See Fig. 3.  
AQUASTAT  
CONTROLLER CASE  
M8771A  
Fig. 3. Mount L4006H directly on surface.  
Wiring  
WARNING  
Can cause serious injury, death or equipment  
damage.  
Disconnect power supply before connecting wiring  
to avoid electrical shock or equipment damage.  
24 VOLT  
THERMOSTAT  
1
L2 HIGH LIMIT  
L4006A OR L4007A  
Electrical Shock Hazard.  
RA832A  
L1  
SWITCHING RELAY  
(HOT)  
AQUASTAT¨  
CONTROLLER  
T
X
T
2
1
1
2
IGNITION  
BURNER  
All wiring must comply with local codes and ordinances  
regarding wire size, insulation, enclosure, etc. See Fig. 4  
and 5 for typical diagrams of Aquastat® Controllers used  
in heating systems.  
4
3
X
4
CIRCULATOR  
L4006B OR L4007B  
CIRCULATOR  
AQUASTAT¨  
Use these Aquastat Controllers with copper wire only.  
CONTROLLER  
T
T
2
2
4 VOLT  
THERMOSTAT  
L4006A OR L4007A LOW LIMIT  
AQUASTAT¨ CONTROLLER  
LOW WATER  
CUTOFF  
PRESSURE  
CONTROL  
PROTECTORELAY¨  
CONTROL  
L1  
(
HOT)  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
L2  
1
M2855A  
2
L4006A OR  
L4007A  
USE L4006E FOR MANUAL RESET.  
LOW LIMIT  
AQUASTAT¨  
GAS  
VALVE  
PILOTSTAT¨  
CONTROL  
Fig. 5. Hookup for oil-fired, summer-winter, hydronic  
system with domestic hot water. This is typical where  
control for domestic hot water is added, or where  
each Aquastat Controller is mounted in a separate  
location.  
CONTROLLER  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROJECTION AS REQUIRED.  
M2856  
2
USE L4006E FOR MANUAL RESET.  
Fig. 4. Typical hookup for gas-fired system with  
domestic hot water.  
3
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
Adjust the control point to correspond with the boiler  
manufacturer recommendations. To adjust, insert a  
screwdriver in the slotted screw type head located  
beneath the window in the cover. Turn the scale to the  
desired control point.  
OPERATION  
For proper selections of settings, follow boiler  
manufacturer recommendations:  
1
.
High limit controller: Shuts off burner when water  
temperature exceeds high limit setting. Burner  
restarts when temperature drops to high limit setting  
minus the temperature differential.  
Manual Reset  
When the device includes manual reset (L4006E and H),  
be sure to press the red reset button on the front of the  
case to make sure that the controller is not locked out on  
safety. When checking out the system, adjust the control  
point low enough so the temperature of the controlled  
medium reaches the high limit setting, the burner shuts  
off, and the Aquastat Controller locks out. When the  
temperature of the controlled medium drops to the high  
limit setting minus differential, push the manual reset  
button and the system should be operative again. Reset  
control to proper high limit setting.  
NOTE: If L4006E or H, see Manual Reset section.  
2.  
Low limit controller: Maintains minimum boiler tem-  
perature for domestic hot water. Turns boiler on at  
temperature setting, less differential.  
Circulator controller: Prevents circulation of water  
that is not hot enough. Breaks circulator circuit at  
temperature setting minus differential and remakes  
at setting.  
3.  
CHECKOUT  
ADJUSTMENT  
Check to make certain that the Aquastat Controller has  
been installed and adjusted properly. Put the system into  
operation and observe the action of the device through  
several cycles to make certain that it provides proper  
control of the system as described in the Operations  
section. Further adjustments can be made to meet more  
exact comfort requirements.  
Set the differential to correspond with the boiler  
manufacturer recommendations. To adjust models with  
adjustable differential, rotate the wheel on the back of the  
snap switch until the desired reading is aligned with the V  
notch in the frame. The wheel provides an adjustment  
from 5°F to 30°F (3°C to 17°C). Replace the cover on the  
Aquastat Controller.  
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
MATERIAL SAFETY DATA SHEET  
Date Released: October 8, 1999  
Section 1. Product And Company  
Identification  
Customer Response Center: 800-328-5111  
Emergency Telephone Information: 888-809-3787  
NFPA Ratings:  
Product Name: Heat Conductive Compound  
MSDS ID: DS9021  
Synonyms: MS1699  
Health 0; Flammability 1; Reactivity 0; Personal Pro-  
tection B  
Product Use: Heat conductive material used to enhance  
contact and heat transfer in temperature sensor  
applications.  
Section 2. Composition, Information on  
Manufacturer: Honeywell Inc., 1985 Douglas Drive North, Ingredients  
Minneapolis, MN 55422.  
Ingredient  
CAS Number  
Percent  
PEL  
TVL  
#2 Lithium Complex Grease (70%):  
Mineral Oil  
Mineral Oil  
64742-65-0  
35-50  
mg/m3  
5 mg/m3  
5 mg/m3  
5
5
64742-62-7  
68815-49-6  
20-25  
4-9  
mg/m3  
Lithium Hydrostearate/Sebacate  
Complex  
Zinc Alkyldithiophosphate  
Aluminum Paste (30%):  
Aluminum, as Al  
68649-42-3  
0-2  
7429-90-5  
8052-41-3  
20-25  
10-15  
5 mg/m3  
10 mg/m3  
1
2
Aliphatic Petroleum Distillates  
900 mg/m3  
525 mg/m3  
Stearic Acid  
57-11-4  
1-2  
1-2  
Aromatic Petroleum Distillates  
64742-95-6  
mg/m3  
5 mg/m3  
5
Additional Information: Part No. 120650 (0.5 oz tube); Part No. 107408 (4 oz can); Part No. 197007 (5 gallon  
container). May also contain minute amounts of lithium and molybdenum lubricant compounds.  
Skin Contact: Remove excess with cloth or paper.  
Wash thoroughly with mild soap and water. Obtain  
medical attention if irritation develops and persists.  
Section 3. Hazard Identification  
Acute Health Effects:  
Skin: Excessive contact may cause skin irritation and  
dermatitis.  
Ingestion: Contact physician or local poison control  
center immediately.  
Eye: Direct contact with eye will cause irritation.  
Inhalation: No adverse effects are expected.  
Inhalation: Remove patient to fresh air and obtain  
medical attention if symptoms develop.  
Section 5. Fire Fighting Measures  
Ingestion: Ingestion of product may cause nausea,  
vomiting and diarrhea.  
Material Flash Point: > 383°F (195°C). Will burn if  
exposed to flame.  
Chronic Health Effects:  
Existing skin rash or dermatitis may be aggravated by  
repeated contact.  
Extinguishing Media: Carbon dioxide, dry chemical or  
foam.  
Special Fire Fighting Procedures: None.  
OSHA Hazard Classifications: None.  
Explosion Hazards: None. Aluminum powder can react  
with water to release flammable hydrogen gas. In the  
form of this product, this reaction is not expected.  
Carcinogenicity: Not considered to be a carcinogen by  
either OSHA, NTP, IARC, or ACGIH.  
Section 4. First Aid Measures  
Section 6. Accidental Release Measures  
Eye Contact: Flush eyes with water for 15 minutes.  
Remove any contact lenses and continue to flush.  
Obtain medical attention if irritation develops and  
persists.  
Scrape up and dispose of as solid waste in accordance  
with state and federal regulations.  
5
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
Incompatibilities: Strong oxidizing agents and  
halogens.  
Section 7. Handling and Storage  
Store in dry place. Keep container closed when not in  
use.  
Hazardous Decomposition Products: Carbon dioxide,  
carbon monoxide.  
Section 8. Exposure Controls and  
Personal Protection.  
Section 11. Toxicology Information.  
Ventilation: No special ventilation is required when  
working with this product.  
No data available.  
Section 12. Ecological Information  
Respiratory Protection: None required.  
Chemical Fate Information: Hydrocarbon components  
will biodegrade in soil; relatively persistent in water.  
Eye Protection: Not normally required. However, use  
chemical safety goggles or faceshield if potential for  
eye contact exists, especially if material is heated.  
Section 13. Disposal Consideration  
Hand/Clothing Protection: Not normally required. Pro-  
tective gloves and clothing are recommended, as  
material is difficult to remove from skin and clothing.  
Dispose of as solid waste in accordance with local,  
state and federal regulations.  
Section 14. Transportation Information  
Other Protective Equipment: None required.  
DOT Classification: Not classified as hazardous.  
Section 9. Physical and Chemical  
Properties  
Section 15. Regulatory Information  
SARA Title III Supplier Notification: Include in Section  
Appearance/Odor: Aluminum color, semi-solid  
material, pleasant odor.  
3
11/312 inventory reports if amounts exceed 10,000  
pounds. Aluminum compounds are subject to the  
reporting requirements under Section 313 of  
Emergency Planning and Community Right-To-Know  
Act of 1986 (40 CFR 372). Ingredients listed in TSCA  
Inventory.  
Solubility in Water: Negligible.  
Specific Gravity: 0.86.  
Section 10. Stability and Reactivity  
Section 16. Other Information  
Stability: Stable.  
This information is furnished without warranty,  
expressed or implied, except that is is accurate to the  
best of our knowledge.  
Reactivity: Hazardous polymerization will not occur.  
Prepared by: PROSAR, 1295 Bandana Boulevard, Suite 335, St. Paul, MN 55108 (651-917-6100).  
60-0915—5  
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60-0915—5  
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L4006A,B,E,H AQUASTAT® CONTROLLERS  
Automation and Control Solutions  
Honeywell International Inc.  
985 Douglas Drive North  
Honeywell Limited-Honeywell Limitée  
1
35 Dynamic Drive  
Golden Valley, MN 55422  
customer.honeywell.com  
Scarborough, Ontario M1V 4Z9  
®
©
U.S. Registered Trademark  
2005 Honeywell International Inc.  
60-0915—5 C.H. Rev. 08-05  

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