Honeywell VK4100A1002 gas valve

The Honeywell VK4100A1002U gas valve is a part of the burner control and ignition system that provides safe ignition, flame control and gas flow control for the pilot and/or main burner. This system includes the VK4100 A 1002U gas control block itself and a special ignition regulator that is attached to it.

The Resideo VK4100A 1002U combined gas valve has a standard housing and can be configured with various options, such as:

• Pressure regulation by means of a servo drive.
• Regulation by means of a throttle valve.
• Smooth ignition using the SOFTLITE system.
• Regulation of gas and air with a ratio of 1:1.
• Electric two-level regulator.
• Smooth regulation with amplification for various types of control.

The VK4100A1002B gas regulator has two electrical devices: one for controlling the main valve and the other for controlling its position.

This gas solenoid valve can work with three types of gas: heating gas, natural gas and liquefied gas.

General characteristics

• The inlet and outlet are suitable for flanged connection
• Screen: On the input side
• Pressure valve: Top for measuring inlet and outlet pressure
• Gas connection: Inlet: diameter 18.6 mm Outlet: side outlet diameter 18.6 mm: –
• Back pressure: 1st valve: 50 mbar; 2nd valve: 0 mbar
• Compression fitting: 4 mm
• Ambient temperature: -15 … 60°C
• Maximum inlet pressure: 60 mbar

Management functions

• Maximum working pressure: 45 mbar
• Control flow rate: 0.1 mph (min) of air at a pressure drop of 9 mbar
• Leakage requirements: According to EN126
• Performance (by air): 3.4 miles/3 mbar thermal pressure drop

Standard working conditions

• Nominal inlet gas pressure of 25 millibars, dry air at 20°C.
• Ambient pressure 1013 millibars.
• The ambient temperature is 20°C.
• The aperture is 2.8 millimeters in size.
• Display of gas consumption in cubic meters per hour.
• Registration of the output pressure using a sensor connected to a pipe with a diameter of 1/2 inch, 10 times the diameter, through a short hose with a length equal to 5 pipe diameters.
• Operation at rated voltage.
• Installation in a vertical position.

General provisions

The VK4100A 1002B gas solenoid valve combines all the safety and burner control functions in one reliable system. The inlet and outlet of the valve have a diameter of 18.6 millimeters and can be connected via flanges. There are different models of this valve with different levels of closing force: B + J, B + C, B + B.

There is a built-in fine-mesh filter at the inlet of the VK4100 A 1002B compact gas unit, which is not intended for cleaning. An additional output filter can be added if necessary. There are holes at the bottom of the valve for mounting to the installation.

There are variants of gas valves with side gas outlet for both the main and pilot burners. However, such a side outlet can only be used with a flanged burner manifold. In addition, there is a connection for pilot gas with a diameter of 4 mm at the outlet of the VK4100A1002A gas regulator. It is also possible to install pressure measuring fittings using silicone tubes with a diameter of 4 or 6 mm.

It is worth noting that there is a choice of different types of electrical connections, such as connecting to the ignition regulator using a connector or using a plug-in rectifier unit for a standard DBI ignition system. In addition, it is possible to choose options for operation at a voltage of 24V for joint use with other ignition regulators, excluding regulators of the S4565/S4585 series.

The principle of operation

As for the principle of operation, VK4100A102U gas control units use a positive feedback system (the main valve automatically closes when there is no power supply or gas pressure is exceeded). The system includes a pressure servo controller and a pressure relief valve that work together. When the power supply is supplied, the gas passes through the servo controller and opens the main valve. The system then maintains a constant pressure by regulating the operation of the main valve. This guarantees a stable output pressure, even with changes in the input pressure.