Honeywell Thermostat L4006B Users Manual 60 0915 L4006A,B,E,H Aquastat Controllers

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INSTALLATION INSTRUCTIONS

60- 0915- 4

L4006A,B,E,H

Aquastat® Controllers

APPLICATION

These boiler-mounted, immersion type controllers

operate in response to temperature changes in hydronic

heating systems.

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.

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.

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.

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

124904 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 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.

2. Check the ratings given in the instructions and on

the product to make sure the product is suitable for

your application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

WARNING

Electrical Shock Hazard.

Can cause serious injury, death or equipment

damage.

Disconnect the power supply before beginning

installation to prevent electrical shock or

equipment damage.

Installing Immersion Well Models

(L4006A,B,E)

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.

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.

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.

Follow the boiler manufacturer instructions, if available;

otherwise, proceed as follows.

L4006A,B,E,H AQUASTAT® CONTROLLERS

60-0915—4 2

1. Remove the old control.

2. Refer to the cover insert of the old control to

identify and tag each lead as it is disconnected.

3. Leave the old well in place if it is suitable.

If Well is Otherwise Suitable But Does Not Fit

The L4006 Immersion Well Clamp

Use a 124904 Well Adapter (order separately, see form

68-0040) to secure the L4006 to the old well. The

adapter has a flange at one end for fastening the L4066

adapter clamp.

1. Loosen, but do not remove, the two adapter clamp

screws (see Fig. 1).

2. Slide the adapter onto the capillary and short tube;

see Fig. 2 inset.

3. 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.

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.

5. Tighten the setscrew (if one is present in the old

well spud) against the adapter. Fig. 1. Internal view of L4006A,B with horizontal well.

L4006E is the same with reset button added.

Fig. 2. Bulb in immersion well and use of adapter.

If the Old Well Is Unsuitable.

1. Drain the system and remove the well.

2. Select a new well from form 68-0040 (order well

separately).

3. Install the new well, refill the system and check for

leaks.

4. Loosen, but do not remove, the two adapter clamp

screws (Fig. 1).

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.

M4679

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.

1

2

1

2

CONTROLLER

CASE

ADAPTER

ADAPTER

CLAMP

IMMERSION

WELL SPUD

BOILER

OLD IMMERSION

WELL ASSEMBLY

BACK OF

CASE

ADAPTER

ADAPTER

CLAMP

SENSING

BULB

HEAT-CONDUCTIVE COMPOUND

SETSCREW

CAPILLARY

TUBE

(C)

SHORT TUBE

FITS IN CENTRAL

RECESS OF

ADAPTER

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

1

2

2(D)

(B)

(A)

1

L4006A,B,E,H AQUASTAT® CONTROLLERS

3 60-0915—4

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.

Mounting Surface Mount Model (L4006H)

The L4006H is designed for surface mounting on piping

or tanks and can be mounted in any position.

When mounting the L4006H on piping, the pipe should

be 1 in. (25 mm) diameter or larger for accurate

temperature sensing.

1. Remove any insulation from the pipe.

2. Thoroughly scrape off all scale, rust or paint.

3. Mount controller as shown in Fig. 3 using

adjustable pipe strap furnished.

When mounting the L4006H on a tank, use a pipe strap

(not provided) of appropriate length for the tank. Fit the

pipe strap through the slot in the mounting bracket. See

Fig. 3.

Wiring

WARNING

Electrical Shock Hazard.

Can cause serious injury, death or equipment

damage.

Disconnect power supply before connecting

wiring to avoid electrical shock or equipment

damage.

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.

Use these Aquastat Controllers with copper wire only.

Fig. 3. Mount L4006H directly on surface.

Fig. 4. 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.

M8771

ENCLOSED

SENSING BULB

PIPE

ADJUSTABLE

PIPE STRAP

AQUASTAT¤

CONTROLLER

CASE

1

2

3

4

T

T

IGNITION

BURNER

L4006B OR L4007B

CIRCULATOR

AQUASTAT¤

CONTROLLER

CIRCULATOR

L4006A OR L4007A LOW LIMIT

AQUASTAT¤ CONTROLLER

L1

(HOT) L2

L4006A OR L4007A

HIGH LIMIT

AQUASTAT¤

CONTROLLER

24 VOLT

THERMOSTAT

RA832A

SWITCHING RELAY

PROTECTORELAY¤

CONTROL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

USE L4006E FOR MANUAL RESET.

1

2 M2855A

TT

XX4

2

1

1

2

L4006A,B,E,H AQUASTAT® CONTROLLERS

60-0915—4 4

Fig. 5. Typical hookup for gas-fired system with

domestic hot water.

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.

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.

3. Circulator controller: Prevents circulation of water

that is not hot enough. Breaks circulator circuit at

temperature setting minus differential and remakes

at setting.

ADJUSTMENT

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.

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.

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.

CHECKOUT

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.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

USE L4006E FOR MANUAL RESET.

1

2 M2856

2

L1

(HOT)

L2 1

24 VOLT

THERMOSTAT

LOW WATER

CUTOFF

PRESSURE

CONTROL

L4006A OR

L4007A

LOW LIMIT

AQUASTAT¤

CONTROLLER

GAS

VALVE

PILOTSTAT¤

CONTROL

L4006A,B,E,H AQUASTAT® CONTROLLERS

5 60-0915—4

MATERIAL SAFETY DATA SHEET

Section 1. Product And Company

Identification

Product Name: Heat Conductive Compound

MSDS ID: DS9021

Synonyms: MS1699

Product Use: Heat conductive material used to enhance

contact and heat transfer in temperature sensor

applications.

Manufacturer: Honeywell Inc., 1985 Douglas Drive North,

Minneapolis, MN 55422.

Date Released: October 8, 1999

Customer Response Center: 800-328-5111

Emergency Telephone Information: 888-809-3787

NFPA Ratings:

Health 0; Flammability 1; Reactivity 0; Personal Pro-

tection B

Section 2. Composition, Information on

Ingredients

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.

Section 3. Hazard Identification

Acute Health Effects:

Skin: Excessive contact may cause skin irritation and

dermatitis.

Eye: Direct contact with eye will cause irritation.

Inhalation: No adverse effects are expected.

Ingestion: Ingestion of product may cause nausea,

vomiting and diarrhea.

Chronic Health Effects:

Existing skin rash or dermatitis may be aggravated by

repeated contact.

OSHA Hazard Classifications: None.

Carcinogenicity: Not considered to be a carcinogen by

either OSHA, NTP, IARC, or ACGIH.

Section 4. First Aid 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.

Skin Contact: Remove excess with cloth or paper.

Wash thoroughly with mild soap and water. Obtain

medical attention if irritation develops and persists.

Ingestion: Contact physician or local poison control

center immediately.

Inhalation: Remove patient to fresh air and obtain

medical attention if symptoms develop.

Section 5. Fire Fighting Measures

Material Flash Point: > 383°F (195°C). Will burn if

exposed to flame.

Extinguishing Media: Carbon dioxide, dry chemical or

foam.

Special Fire Fighting Procedures: 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.

Section 6. Accidental Release Measures

Scrape up and dispose of as solid waste in

accordance with state and federal regulations.

Ingredient CAS Number Percent PEL TVL

#2 Lithium Complex Grease (70%):

Mineral Oil 64742-65-0 35-50 5 mg/m35 mg/m3

Mineral Oil 64742-62-7 20-25 5 mg/m35 mg/m3

Lithium Hydrostearate/Sebacate

Complex

68815-49-6 4-9 — —

Zinc Alkyldithiophosphate 68649-42-3 0-2 — —

Aluminum Paste (30%):

Aluminum, as Al 7429-90-5 20-25 15 mg/m310 mg/m3

Aliphatic Petroleum Distillates 8052-41-3 10-15 2900 mg/m3525 mg/m3

Stearic Acid 57-11-4 1-2 — —

Aromatic Petroleum Distillates 64742-95-6 1-2 5 mg/m35 mg/m3

L4006A,B,E,H AQUASTAT® CONTROLLERS

60-0915—4 6

Section 7. Handling and Storage

Store in dry place. Keep container closed when not in

use.

Section 8. Exposure Controls and

Personal Protection.

Ventilation: No special ventilation is required when

working with this product.

Respiratory Protection: None required.

Eye Protection: Not normally required. However, use

chemical safety goggles or faceshield if potential for

eye contact exists, especially if material is heated.

Hand/Clothing Protection: Not normally required. Pro-

tective gloves and clothing are recommended, as

material is difficult to remove from skin and clothing.

Other Protective Equipment: None required.

Section 9. Physical and Chemical

Properties

Appearance/Odor: Aluminum color, semi-solid

material, pleasant odor.

Solubility in Water: Negligible.

Specific Gravity: 0.86.

Section 10. Stability and Reactivity

Stability: Stable.

Reactivity: Hazardous polymerization will not occur.

Incompatibilities: Strong oxidizing agents and

halogens.

Hazardous Decomposition Products: Carbon dioxide,

carbon monoxide.

Section 11. Toxicology Information.

No data available.

Section 12. Ecological Information

Chemical Fate Information: Hydrocarbon components

will biodegrade in soil; relatively persistent in water.

Section 13. Disposal Consideration

Dispose of as solid waste in accordance with local,

state and federal regulations.

Section 14. Transportation Information

DOT Classification: Not classified as hazardous.

Section 15. Regulatory Information

SARA Title III Supplier Notification: Include in Section

311/312 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.

Section 16. Other Information

This information is furnished without warranty,

expressed or implied, except that is is accurate to the

best of our knowledge.

Prepared by: PROSAR, 1295 Bandana Boulevard, Suite 335, St. Paul, MN 55108 (651-917-6100).

7 60-0915—4

60-0915—4 G.R. Rev. 12-01 www.honeywell.com

L4006A,B,E,H AQUASTAT® CONTROLLERS

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paper containing at least 10%

post-consumer paper fibers.

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