Honeywell Comprehensive Guide to Aquastat Controllers and Manual Reset for Products
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L4006,7,8; L6006,7,8 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.

Adjusting L6008G Interstage Differential

The L6008G Controller has an adjustable interstage differential. The set point adjustment knob determines the temperature at which the right switch operates. The left switch can be adjusted to operate from 3° F to 10° F (1.7° C to 5.6° C) above the point of operation of the right switch. See Figure 30 for the operation of the L6008G. The interstage differential is adjusted by turning the star wheel with a narrow screwdriver inserted into the rectangular hole in the chassis. (See Fig. 32).

LEFT SWITCH

RIGHT

1SWITCH

STAR WHEEL (INTERSTAGE

DIFFERENTIAL ADJUSTMENT)

1 SELECT MODELS HAVE FOUR TERMINALS.

M8972

Fig. 32. Interstage differential adjustment on an L6008G.

L6008A Location Differential Calibration

The L6008A1093 is calibrated for applications where the bulb and controller case are located in the same control space.

If the bulb and controller case are located in separate rooms, and if the temperature in the two rooms is different, an adjustment is required. Adjust the dial setting (control space temperature setting) to compensate for the difference in temperature.

1.If the L6008A case is located in a room with a higher temperature than indicated on the dial setting, raise the dial setting the number of degrees listed in Table 3.

2.If the L6008A case is located in a room with a lower temperature than indicated on the dial setting, lower the dial setting the number of degrees listed in Table 3.

Table 3. Temperature Adjustments.

Difference Between Desired

 

 

Room Temperature and

 

 

Case Temperature

Reduce Dial Setting

°F

°C

°F

°C

0

0

—

0

5

3

3/4

0.5

 

 

 

 

10

6

1-1/2

1

 

 

 

 

15

8

2

1

 

 

 

 

20

11

2-3/4

2

 

 

 

 

25

14

3-1/2

2

 

 

 

 

30

17

4-1/4

3

 

 

 

 

35

20

5

3

 

 

 

 

40

22

5-3/4

4

 

 

 

 

45

25

6-1/2

4

 

 

 

 

50

28

7

4

 

 

 

 

55

31

8

5

 

 

 

 

60

33

8-1/2

5

 

 

 

 

70

39

10

6

 

 

 

 

80

45

11-1/2

7

 

 

 

 

EXAMPLE:

In the example shown in Fig. 33, the L6008A case is located in a room with a lower temperature than the controlled space. Adjusting the controlled space setting (dial setting) is necessary to compensate for the temperature difference of 35° F (20° C) between the two rooms. Table 3 indicates that the dial setting should be lowered 5° F (3° C) to compensate for the 35° F (20° C) temperature difference.

Manual Reset

If the device includes manual reset (L4006E, L4008E), 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 the system, adjust the limit setting low enough so the temperature of the controlled medium reaches the high limit setting. When the limit setting is reached, the Aquastat Controller locks out and the burner shuts down. When the temperature of the controlled medium drops to the high limit setting, less the differential, push the manual reset button to make the system operative again. Reset the control to the proper high limit setting.

L6008A

CASE

ROOM TEMPERATURE 80oF (27oC)

WALL

REMOTE

SENSING

BULB

CONTROLLED SPACE TEMPERATURE 115oF (46oC)

M8790A

Fig. 33. L6008A calibration.

60-2104—10

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Contents Contents FeaturesGeneral Specifications Ordering InformationFinish Gray Dimensions Accessories and PartsApprovals MountingStandard Knockout Standard Models Switching On Range Differential Insertion aModel Application Rise Available Options Switching On Range Differential Insertion a L6006, L6007, L6008 Controller Spdt Switching Specifications When Installing This Product… InstallationElectrical Shock Hazard Can cause serious injury or death Installing Direct Immersion Models L4006C, L6006B Mounting Immersion WellMounting With Capillary Compression Fitting Mounting With Bulb Compression FittingDuct Mounting Mounting L6008A Remote Bulb Controller Mounting Remote Bulb Models For Outdoor Air SensingMounting with Guard Bracket Mounting Surface Mount Models WiringMounting on Suction Line Typical oil-fired gravity system Operation High Limit ControllerAdjustments L6008G Adjustable Interstage DifferentialAdjusting Differential Low Limit ControllerManual Reset Adjusting L6008G Interstage DifferentialL6008A Location Differential Calibration Checkout Material Safety Data Sheet Accidental Release Measures Handling and StorageExposure Controls and Personal Protection Physical and Chemical PropertiesAutomation and Control Solutions

L6006, L4008, L6008, L6007, L4007 specifications

Honeywell has long been a leader in the field of heating, ventilation, and air conditioning (HVAC) controls, and its range of controls including the L4007, L6007, L6008, L4008, and L6006 models exemplifies this commitment to innovation, reliability, and energy efficiency.

The L4007 series is designed primarily for low-pressure applications, providing accurate control over gas and oil burners. With features such as adjustable differential settings, this series ensures that the heating systems operate optimally, enhancing both performance and safety. The robust construction and weather resistance make the L4007 an ideal choice for a variety of heating applications.

In contrast, the L6007 series takes it a step further by incorporating advanced technologies for more complex heating systems. These thermostats offer features like dual setpoint capabilities, temperature calibration, and improved diagnostics. They are particularly suited for commercial applications, where precision is essential for maintaining comfortable environments.

The L6008 expands on these features by introducing programmable capabilities. Users can tailor their heating needs according to specific schedules, leading to more efficient energy use. This model incorporates smart technology, allowing for integration with other smart home devices, which adds an extra layer of convenience for homeowners.

For those requiring more comprehensive control, the L4008 offers superior compatibility and flexibility. This model can manage multiple stages of heating or cooling and is perfect for systems that demand high degrees of control. With built-in protections against overheating and malfunction, the L4008 ensures a safe operation for all heating systems.

The L6006 offers a unique solution for applications that require both heating and cooling capabilities. This model is designed for versatility, making it suitable for a range of environments, from residential to commercial. Its user-friendly interface and precise control settings simplify the operation and management of HVAC systems.

Overall, Honeywell’s L4007, L6007, L6008, L4008, and L6006 models reflect the brand's dedication to providing high-quality, reliable, and efficient control solutions for diverse heating and cooling needs. They are engineered with advanced technologies that prioritize user comfort, energy efficiency, and system protection, making them essential tools for modern HVAC applications.
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