LEFT SWITCH

TEMPERATURE DIFFERENTIAL

RISE

2

SETPOINT

 

 

 

RIGHT SWITCH

 

 

 

(ADJUSTABLE)

 

 

 

DIFFERENTIAL

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BREAKS R-B

MAKES R-W

ON RISE

BREAKS R-W

MAKES R-B

ON FALL

INTERSTAGE

DIFFERENTIAL

1

BREAKS R-B

MAKES R-W

ON RISE

BREAKS R-W

MAKES R-B

ON FALL

L4006,7,8; L6006,7,8 AQUASTAT® CONTROLLERS

Low Limit Controller

R-B terminals provide low limit switching function (contacts open at set point on temperature rise). Maintains minimum boiler temperature for domestic hot water. Turns on boiler at temperature setting, less differential.

Circulator Controller

R-W terminals provide circulation control function (contacts close at set point on temperature rise). Prevents circulation of water that is below the desired heating temperature. Breaks circulator circuit on temperature drop below setting less differential; remakes on rise to setting.

L6008G Adjustable Interstage Differential

When the temperature at the sensing element rises above the set point of the controller, the switch on the right makes R-W. If the temperature continues to rise through the preselected interstage differential of the controller, the switch on the left makes R-W.

1DIFFERENCE BETWEEN THE TEMPERATURES AT WHICH THE TWO SWITCHES MAKE R-W. ADJUSTABLE FROM 3°F TO 10°F (1.7°C TO 5.6°C) ON STANDARD MODELS, OR FROM 3.6°F TO 12°F (2.0°C TO 6.7°C); 55°F TO 175°F (13°C TO 79°C) MODELS.

2TWO SPDT SWITCHES OPERATE IN SEQUENCE. EACH SWITCH DIFFERENTIAL IS FIXED AT APPROXIMATELY 3°F (1.7°C) ON STANDARD MODELS, OR AT 3.6°F (2.0°C); 55°F TO 175°F (13°C TO

79°C) MODELS.

M2999B

Fig. 29. Operation of L6008G.

BREAKS

ON RISE

LEFT SWITCH

TEMPERATURE DIFFERENTIAL

RISE

2

MAKES

ON FALL

INTERSTAGE

DIFFERENTIAL

1

SETPOINT

 

 

 

 

 

 

BREAKS

 

 

 

 

 

 

 

 

 

 

 

RIGHT SWITCH

ON RISE

 

 

 

 

 

(ADJUSTABLE)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIFFERENTIAL

 

 

 

 

 

 

 

 

 

 

 

 

 

2

MAKES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON FALL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1DIFFERENCE BETWEEN THE TEMPERATURES AT WHICH THE TWO SWITCHES BREAK ON TEMPERATURE RISE.

2SWITCHES OPERATE IN SEQUENCE. RIGHT SWITCH

FIRST-ON TEMPERATURE RISE.

M4671A

Fig. 30. Operation of L4008L.

Conversely, on a temperature fall, the switch on the left makes R-B, providing first step switching. If the temperature continues to fall, the switch on the right makes R-B to provide sequencing of equipment.

ADJUSTMENTS

Adjusting Differential

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, (See Fig. 32), 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.

DIFFERENTIAL

WHEEL

1NOTCH IN FRAME

SNAP

SWITCH

1SELECT MODELS HAVE A SCREW TERMINAL INSTEAD OF TAB TERMINAL.

M8969

Fig. 31. Adjusting the differential.

15

60-2104—10

Page 14 Page 16
Page 15
Image 15
Honeywell L4007, L6007 Adjustments, Low Limit Controller, Circulator Controller, L6008G Adjustable Interstage Differential
Page 14 Page 16

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.
Top Page Image Contents