3-Way 1" Motorised Zone Valve

The Resideo V4044C1312/U motorized zone valve is a 3-way diverter valve with 1" female threaded connections, designed to automatically direct water flow between two circuits in heating and domestic hot water installations. It operates with a 230 V / 50 Hz electric actuator with spring return and offers a Kvs of 8.1, providing a compact solution for domestic hydronic systems and small commercial applications.

This version of the V4044C series operates with on/off control and features a brass body suitable for fluid temperatures between 5 and 88 °C. For the 1" reference, Resideo specifies a maximum differential pressure of 0.55 bar, while the series maximum operating pressure is 8.6 bar.

Key features of the Resideo V4044C1312/U

• Brand: Resideo.
• Series: V4044C.
• Reference: V4044C1312/U.
• Type: motorized diverter zone valve.
• Number of ways: 3.
• Operation: on/off.
• Connections: 1" female thread.
• Nominal diameter: DN25.
• Kvs: 8.1.
• Power supply: 230 V AC.
• Frequency: 50 Hz.
• Control signal: SPST.
• Return: spring return.
• Maximum operating pressure: 8.6 bar.
• Maximum differential pressure: 0.55 bar.
• Fluid temperature: 5 to 88 °C.
• Ambient temperature: 5 to 50 °C.
• Valve body: brass.
• Actuator cover and base: galvanized steel.
• Cable length: 1,000 mm.

3-way motorized diverter valve

The V4044C1312/U is designed to divert flow to one of two circuits. Unlike a mixing valve, its operation is intended to select one hydraulic path or the other, allowing automatic management of water distribution according to the needs of the installation.

Resideo indicates that the V4044C series can be used to control flow between heating and domestic hot water circuits in fully pumped central systems. The valve allows flow to only one zone at a time, making it easier to prioritize or automatically select between different circuits.

1" female threaded connections

The V4044C1312/U reference corresponds specifically to the 1" connection version. The female threaded connections make it easy to integrate into conventional hydronic installations using compatible fittings.

For this size, Resideo specifies a Kvs of 8.1, a parameter that represents the hydraulic flow capacity of the valve and should be considered together with the design flow rate and the available pressure drop in the installation.

Maximum differential pressure of 0.55 bar

The 1" version supports a maximum differential pressure of 0.55 bar. This value determines the maximum pressure difference across the valve under the operating conditions specified by the manufacturer.

The maximum service pressure stated for the V4044 series is 8.6 bar. Both values should be checked during hydraulic sizing to ensure the valve can perform its opening and return movements correctly.

230 V electric actuator

The actuator operates with a 230 V AC power supply at 50 Hz, a common configuration in domestic heating installations. The actuation is on/off type via an SPST signal.

When the actuator is energized, the motor moves the valve to the corresponding position. When the voltage is removed, the spring return moves the mechanism back to its rest position.

Spring return

The mechanical return system allows the valve to automatically adopt a defined position when it is no longer powered. According to Resideo documentation for the V4044C series, the valve moves electrically toward port A and returns toward port B by spring action.

The manufacturer specifies an approximate 18 seconds for motorized movement toward port A and about 8 seconds for spring return toward port B.

On/off control

The Resideo V4044C1312/U operates with a simple ON/OFF control system. This makes it suitable for use with thermostats, aquastats, or other compatible control devices that provide the required signal to the actuator.

This type of operation is especially suitable when it is only necessary to select between two hydraulic paths without proportional flow regulation.

No integrated auxiliary contact

The V4044C series corresponds to versions without an integrated auxiliary microswitch. Resideo distinguishes these valves from the V4044F series, which does include an auxiliary contact for signaling or controlling other equipment.

For this reason, the V4044C1312/U is especially suited to installations where only hydraulic switching between the two circuits is required, without the need for an additional end-switch electrical signal.

For water and water-glycol mixtures

The valve is suitable for use with water and water-glycol mixtures compatible with Resideo requirements and the conditions established by VDI 2035.

The permitted fluid temperature range is 5 to 88 °C, allowing use in heating circuits as well as other hydronic systems operating within this range.

Brass body

The hydraulic body is made of brass, providing mechanical strength for normal operation in heating systems. The actuator cover and base are made of galvanized steel, protecting the electrical and drive mechanism.

Its construction combines the valve body and motorized actuator in a single assembly, simplifying installation in new systems or replacement work for a compatible valve.

Applications of the V4044C1312/U

This diverter valve can be used in installations where one of two hydraulic circuits must be selected automatically. Typical applications include:

• Domestic heating systems.
• Heating and DHW production installations.
• Switching between heating circuit and hot water storage tank.
• Hydronic installations divided into two circuits.
• Fully pumped central systems.
• Small commercial HVAC installations.
• Applications with water or compatible water-glycol mixtures.

Operation between ports A and B

The V4044 is a diverter valve that uses a common connection to direct flow to one of the other two ports. When the actuator changes position, the water path is switched between both routes, preventing simultaneous supply to the two zones in the applications for which it was designed.

This principle is especially useful in systems with domestic hot water priority or where a single heat source must alternately supply different parts of the installation.

Installation and maintenance

The valve must be installed in accordance with the port identification and layout indicated by Resideo. The flow direction, permitted actuator position, and the space required for future maintenance operations must also be taken into account.

The manufacturer offers motors, actuator heads, and specific maintenance kits for the V4044 family, making it possible to replace certain components without always having to replace the complete assembly.

To ensure correct operation, the temperature limits, static pressure and differential pressure limits, as well as the electrical wiring instructions set out in the manufacturer’s documentation, must be observed.

Technical data of the Resideo V4044C1312/U

• Manufacturer: Resideo.
• Family: V4044C.
• Reference: V4044C1312/U.
• Product: motorized zone valve.
• Configuration: 3-way.
• Hydraulic function: diverter.
• Control: on/off.
• Input signal: SPST.
• Connections: female thread.
• Size: 1".
• DN: 25.
• Kvs: 8.1.
• Maximum differential pressure: 0.55 bar.
• Maximum operating pressure: 8.6 bar.
• Supply voltage: 230 V AC.
• Frequency: 50 Hz.
• Return: spring return.
• Approximate actuation time toward port A: 18 seconds.
• Approximate return time toward port B: 8 seconds.
• Fluid temperature: 5-88 °C.
• Ambient temperature: 5-50 °C.
• Fluid: water or water-glycol mixture in accordance with manufacturer conditions.
• Body material: brass.
• Actuator cover: galvanized steel.
• Actuator base: galvanized steel.
• Cable length: 1,000 mm.
• Auxiliary contact: not included in the V4044C version.

3-way valve for heating and DHW

The Resideo V4044C1312/U combines a 1" threaded connection, Kvs 8.1, 230 V electric actuation, and spring return to automatically manage flow between two circuits. Its diverter configuration is especially useful in systems where switching between heating and domestic hot water production is required.

Its brass body and on/off operation provide a simple solution for automating water distribution. To achieve the intended performance, the circuit must be correctly sized and the maximum differential pressure of 0.55 bar and the other installation conditions specified by Resideo must be respected.