Honeywell VR4601QB2001 gas valve

Honeywell VR4601QB2001U gas solenoid valves are designed for safe regulation of gas flow in domestic heating systems, heaters, boilers and water heaters. They provide standard functions and can be supplemented with various devices, such as a pressure regulator, a throttle valve, a smooth ignition device, two-level regulation and modulation of gas flow. Honeywell VR4601QB 2001UCompact Automatic gas valves can have different power options, including mains or low-voltage, and different throughput capacities.

The gas valve of the first stage VR4601 QB 2001U is suitable for boilers MORA: VI7690 (7690).

These regulators include two electrical actuators:

• for opening a safety valve of class A or B according to EN 161

• for opening the main valve of class B, C or J according to EN 161.

They are suitable for different types of gases, such as petroleum gases MFD group A (G110), MFD group B (G 120), natural gas H (G 20), natural gas L (G25) and liquefied gas LP (G30).

General characteristics

• Inlet and outlet are suitable for flanged connection

• Screen on the input side

• Pressure valve on the inlet and outlet sides

• Gas connection inlet: diameter 23 mm, outlet: diameter 23 mm

• Compression fitting –

• Back pressure of the 1st valve: 50 mbar, 2nd valve: –

• Ambient temperature 0…60°C

• Maximum inlet pressure 60 mbar

• CE compliance yes

Notes

• Coil with top connection

• Switchable soft lite (in combination with adapter assembly)

Management functions

• Maximum operating pressure 30 mbar

• Control flow rate of 0.1 m3/h (min)

• Leakage requirements according to EN 126

• Capacity (by air) 4.2 m3/h with a pressure drop of 3 mbar

• Softlite pressure 5 mbar -3.5/+0 after 1.5 s

Standard conditions

• 2.8mm output aperture

• Flow indication, m3/h

• Nominal pressure 25 mbar, dry air at 20 °C

• Ambient pressure = 1013 mbar

• Ambient temperature = 20 °C

• Registration of the output pressure using a sensor connected to a half-inch pipe, the length of which is 10 times the diameter, by means of a short hose with a length equal to 5 diameters

• Rated voltage

• Vertical position, i.e. the position when the actuators are on top

General provisions

The Honeywell VR4601QB2001B gas regulator is designed for gas heating installations with DSI, HSI or IP ignition systems for the main burner.

The main burner is controlled by two-position electrical actuators.

The VR4601QB 2001UB controller includes an internal fine-mesh filter on the input side, and can be equipped with an output mesh filter on request. Different models with different closing strength are available:

1. B + B
2. B + J
3. B + C
4. A + J
5. A + C

To control and adjust the pressure of the burner, there are pressure measuring fittings with an outer diameter of 9 mm on the input and output sides. The regulator can be installed within an angle of 90° in any direction from the vertical position of the two-position electric actuator.

At the base of the VR4601 QB 2001B gas valve, two threaded mounting holes are provided for mounting on the heating system. The two-position actuator of the tracking type of the main valve is equipped with an electrical connector according to DIN standard and can be connected to AMP connectors.

Principle of operation

The VR4601QB2001 valve provides automatic control of the gas outlet pressure. It has a built-in positive feedback system, which guarantees the closure of the main valve in case of a power failure or gas supply.

This system ensures a stable outlet pressure, regardless of changes in the inlet pressure. When small volumes of gas are disconnected from the regulator, the outlet pressure is adjusted to compensate for the pressure difference.

If pressure regulation is not required, the regulator spring can be locked. In this case, the full pressure of the “servogas” determines the position of the main valve, which allows you to control the output pressure.