3/4" 3-Way Motorised Zone Valve

The Resideo V4044C1189/U motorized zone valve is a 3-way diverter valve with 3/4" female threaded connections, designed to automatically control water distribution in heating and cooling systems. It includes a 230 V / 50 Hz electric actuator with spring return and operates with on/off control, allowing the flow to be diverted between two hydraulic circuits.

This model offers a Kvs of 6.0 and supports a maximum differential pressure of 0.69 bar. Its brass body, direct 230 V supply and automatic operation make it especially suitable for hydronic heating systems, domestic hot water production and other hydronic installations where selection between two flow paths is required.

Main features of the Resideo V4044C1189/U

• Brand: Resideo.
• Series: V4044C.
• Reference: V4044C1189/U.
• Type: motorized diverter zone valve.
• Number of ways: 3.
• Operation: on/off.
• Connections: 3/4" female thread.
• Nominal diameter: DN20.
• Kvs: 6.0.
• Maximum differential pressure: 0.69 bar.
• Maximum series operating pressure: 8.6 bar.
• Power supply: 230 V AC.
• Frequency: 50 Hz.
• Control: ON/OFF via SPST signal.
• Return: spring return.
• Fluid temperature: 5 to 88 °C.
• Body: brass.
• Auxiliary contact: not included in the V4044C version.

3-way diverter valve

The V4044C1189/U is designed to perform a flow diversion function. Its common connection allows water to be directed to one branch or the other of the system depending on the actuator position, making it possible to automate selection between two hydraulic circuits.

This configuration is useful, for example, in installations where a single heat source must alternately supply a heating circuit or a domestic hot water circuit. It can also be used in other compatible hydronic systems that require automatic selection of one of two flow paths.

3/4" connections and Kvs 6.0

The V4044C1189/U reference corresponds specifically to the version with 3/4" female threaded connections. Its hydraulic capacity is defined by a Kvs value of 6.0, a parameter that should be considered together with the required flow rate and available pressure drop when sizing the installation.

Resideo specifies a maximum differential pressure of 0.69 bar for this variant. Respecting this limit is important to ensure the mechanism can switch correctly between its positions.

230 V electric actuator

The valve includes an actuator designed to operate with a 230 V AC, 50 Hz supply. Its on/off control system allows it to be driven by thermostats, aquastats or other devices compatible with an ON/OFF signal.

The actuator electrically moves the valve to one of the working positions and features a mechanical spring return when power is removed. This configuration provides a defined rest position without needing to keep the motor energized for return movement.

ON/OFF control with spring return

The V4044 family uses a two-position mechanism. When there is a demand, the actuator moves the internal element to change the water path. When power is removed, the spring returns the valve to its rest position.

This operation is suitable for applications where proportional flow regulation is not required, but rather a full switch between two circuits.

Without integrated auxiliary contact

The V4044C version does not include an auxiliary end-switch micro switch. Resideo differentiates this range from the V4044F valves, which do include an auxiliary contact for signaling or electrical coordination with pumps, boilers or other equipment.

For this reason, the V4044C1189/U is suitable for installations where only hydraulic diversion of the water needs to be controlled by the actuator, without requiring an additional electrical signal associated with the final valve position.

Brass body for hydronic installations

The valve body is made of brass, a material widely used in hydraulic components for heating and HVAC installations. Its compact construction integrates the diverter body and electric actuator into a single assembly.

Resideo specifies a fluid temperature range of 5 to 88 °C, suitable for many water-based heating and cooling applications within the manufacturer's limits.

Maximum operating pressure of 8.6 bar

The V4044 family is designed to operate with a maximum operating pressure of 8.6 bar. In the specific case of the V4044C1189/U, the differential pressure limit indicated by Resideo is 0.69 bar.

Both parameters should be checked during hydraulic sizing, since a differential pressure above the permitted value may affect correct valve operation and closing.

Manual override

The V4044 series design includes a manual override mechanism that allows the valve to be operated when there is no electrical power. This feature is useful during commissioning, filling, draining or system checks.

When electrical operation is restored, the mechanism resumes automatic operation according to the commands received from the control system.

Simplified maintenance

The V4044 range is designed to make maintenance easier. Resideo indicates that the motorized head can be removed or replaced without disconnecting the hydraulic connections of the body or draining the circuit when the intervention only affects the actuator.

The motor can also be replaced while keeping the valve body installed, reducing the time required for certain repairs and avoiding unnecessary work on the piping.

Typical applications

The Resideo V4044C1189/U motorized valve can be used in different automatic hydronic control systems, including:

• Residential heating installations.
• Central heating systems.
• Domestic hot water production systems.
• Switching between heating and DHW storage.
• Hydraulic circuits split into two branches.
• Small commercial installations.
• Water-based HVAC systems.
• Applications requiring a three-way diverter valve.

Difference between the V4044C and V4044F series

Within Resideo's range of three-way zone valves there are different configurations. The V4044C1189/U offers 230 V on/off control and spring return, but does not include an auxiliary contact.

The V4044F1000/U variant shares the 3/4" connection, Kvs 6.0 and maximum differential pressure of 0.69 bar, but adds an SPDT auxiliary microswitch. This difference should be taken into account when the installation's electrical scheme needs to confirm valve position or control other equipment via an end-switch contact.

Technical data of the Resideo V4044C1189/U

• Manufacturer: Resideo.
• Family: V4044C.
• Reference: V4044C1189/U.
• Application: hydronic control.
• Valve type: motorized diverter.
• Number of ways: 3.
• Control type: on/off.
• Command signal: ON/OFF SPST.
• Connection: female thread.
• Size: 3/4".
• Nominal diameter: DN20.
• Kvs: 6.0.
• Maximum differential pressure: 0.69 bar.
• Maximum operating pressure: 8.6 bar.
• Power supply: 230 V AC.
• Frequency: 50 Hz.
• Return: spring return.
• Fluid temperature: 5-88 °C.
• Body: brass.
• Connections: internally threaded.
• Auxiliary contact: no.
• Manual override: yes.
• Motorized head replaceable: yes.

Automatic control of flow between two circuits

The Resideo V4044C1189/U 3-way 3/4" valve makes it possible to automate water distribution between two branches using a simple and reliable on/off system. Its Kvs 6.0, brass body, 230 V supply and spring return make it easy to integrate into heating and HVAC installations that require a motorized diverter valve.

To ensure correct operation, special attention should be paid to the maximum differential pressure of 0.69 bar, the 5 to 88 °C temperature range and the wiring, orientation and maintenance instructions established by Resideo.