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Honeywell 1EN2R-9005 0406R3-NE manual Aquastats thermostats, Sensing element, Control mechanism

Models: 1EN2R-9005 0406R3-NE

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DESCRIPTION OF DEVICE FUNCTIONS

Aquastats thermostats

Honeywell manufactures a coprehensive range of water temperature thermostats (trade name Aquastat) for controlling and limiting boiler water temperature in hydronic heating systems.

These sensitive, fast response devices are available in either direct, panel or surface mount versions.

Sensing element

The liquid filled sensing element, including well or sensor assembly, responds to temperature changes of water in a heating system.

The sensor element has a diaphragm type power head connected to a tube type capsule, through a small bore capillary.

Expansion of the liquid, which completely fills the sensing element, is the means of motion of the diaphragm.

The sensor assembly, used on the surface mounted aquastat, envelopes the sensing capsule by means of an aluminium heat shield for better heat conduction, an insulator of glasswool and a mounting bracket.

Control mechanism

The control mechanism is mounted into the thermoplastic housing. The mechanism transfers the motion of the diaphragm to a snap action switch (Micro Switch) and also provides the facility to adjust the temperature level on which the Micro Switch has to operate.

The mechasnism consists of a two piece lever with calibration screw, a plastic actuator for the switch, a cam and shaft for the set-point adjustment, a loading spring for cam and levers and a pad with pushplate to transfer the diaphragm motion to the lever.

Knob with scale and index

The plastic knob with scale and index enables the user to adjust the Aquastat on a selected temperature setting within its range. The knob fits on the cam and stays on it due to the force of the spring on the nave of the knob.

This spring force enables the installer to pull the knob from the cam without the use of tools.

The hole in the knob and the shaft of the cam are provided with a flat side which allows mounting of the knob only in one position in order to maintain the calibration.

The plastic index will be fastened by means of two M4 thread forming screws on the housing.

Micro Switch

The Micro Switch mechanism is also mounted into the plastic housing. the mechanism consists of a snap action spring type PL with contacts and a moveable or a fixed and a stationary contact bracket.

The Micro Switch mechanism is intended to control electrically a burner, a relay, etc. in dependency of the temperature changes in a heating system.

On choice the Micro Switch mechanism can be delivered with the following contact arrangements:

•Single Pole Single Throw,

C-1 breaks on temperature rise

•Single Pole Double Throw,

C-1 breaks on temperature rise. C-2 makes on temperature rise.

The contacts are connected to 6.3 mm terminals which are extending from the outside of the Aquastat housing.

Cover and conduit entries

The housing(s) of the Aquastat can be provided with conduit boxes which are provided with holes to fit Pg 13.5 conduits. To obtain easy wiring possibilities these boxes can be mounted or disconnect without the use of tools (hook in approach).

The conduit box is locked with the front cover, which is fastened by means of an M3 thread forming screw. Also the top cover is locked by the front cover.

Set-point stops

On request, the Aquastat can be delivered with a high and low limit stop. The purpose of these stops is to provide the user with the facility to choose a maximum and/or minimum setting on the scale.

The stop is situated on the rear side of the setting knob. Adjustment is only possible after removal of the knob.

Manual or tool reset

On request, the Aquastat can be delivered with a manual reset or a tool reset feature.

The tool reset feature is covered by the front cover. Operating of the reset button is only possible after removal of the front cover.

The manual reset button potrudes the front cover of the Aquastat and resetting can be done without the use of a tool.

Adjustable differential

On request, it is possible to deliver the Aquastat with an adjustable switch differential.

The adjustable switch differential feature consists of a plastic adjusting dial with pointer, which is connected to a moveable contact.

Turning of the dial changes the contact gap of the Micro Switch and thus the differential.

The dial is situated under the front cover or behind the panel. Adjustable differential feature is only applicable on controllers and recycling limit controls

EN2R-9005 0406R3-NE

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Honeywell 1EN2R-9005 0406R3-NE manual Aquastats thermostats, Sensing element, Control mechanism, Knob with scale and index
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1EN2R-9005 0406R3-NE specifications

The Honeywell 1EN2R-9005 0406R3-NE is an advanced industrial control solution designed to enhance automation processes across various sectors. This programmable logic controller (PLC) model is known for its robust performance, reliability, and versatility, making it an ideal choice for modern manufacturing and industrial environments.

One of the main features of the 1EN2R-9005 is its modular design. This allows for easy scalability and customization, enabling users to tailor the control system according to their specific needs. The modular structure also simplifies maintenance and upgrades, minimizing downtime and ensuring continuous operations.

The device boasts a powerful processing unit that supports complex computing tasks while maintaining quick response times. This capability is crucial in environments where rapid decision-making is essential for process optimization and efficiency. Additionally, the Honeywell 1EN2R-9005 is equipped with an extensive input/output interface, allowing it to connect seamlessly with various sensors, actuators, and other control devices, ultimately enhancing system integration and interoperability.

Another notable characteristic of this PLC model is its high level of environmental resilience. It is designed to withstand extreme temperatures, vibrations, and electrical noise, ensuring durability and consistent performance even in harsh industrial settings. This quality not only prolongs the equipment's lifespan but also reduces the risk of malfunctions.

The Honeywell 1EN2R-9005 also features advanced communication capabilities. It supports multiple communication protocols, enabling it to interface with different network types. This flexibility is essential for today’s interconnected industrial environments, where devices often need to share data in real-time for optimal operation.

Furthermore, the interface for programming and monitoring the 1EN2R-9005 is user-friendly, integrating intuitive software that simplifies the task of configuring and maintaining the system. This ease of use is complemented by extensive documentation and support resources provided by Honeywell.

In summary, the Honeywell 1EN2R-9005 0406R3-NE stands out due to its modular design, powerful processing capabilities, environmental resilience, flexible communication options, and user-friendly interface. These features make it a reliable choice for industries seeking to enhance their automation processes and overall operational efficiency.