Johnson Controls VLC2300GC-C 3-Way Motorized Zone Valve

The Johnson Controls VLC2300GC-C is a motorized 3-way zone valve designed for controlling the flow of hot or chilled water in closed-loop HVAC systems.

This DN20 (3/4″) model operates on 220V power and features a spring-return mechanism to ensure the valve returns to a safe position during power loss.

Technical Specifications

• Valve Type: 3-Way mixing or diverting configuration.
• Size: DN20 (3/4 inch).
• Power Supply: 220V AC (±10%), 50/60Hz.
• Close-off Pressure: 0.35 MPa (50 PSI).
• Rated Pressure: PN20 (300 PSI / 2.0 MPa).
• Operating Times: Opens in less than 18 seconds; closes via spring return in less than 8 seconds.
• Fluid Temperature: Suitable for water between 0°C and 94°C.
• Materials: Forged brass valve body with EPDM rubber seals for bubble-tight shutoff.

Key Features

• Spring Return Action: The valve is “Normally Closed” (NC) to the B port; it can be used in a “Normally Open” (NO) configuration by simply turning the valve around during installation.
• Manual Override: Includes a manual lever on the actuator housing that allows for manual flow control during power outages or system filling. This lever automatically resets to “auto” once power is restored.
• Closed System Limitation: Johnson Controls explicitly recommends using these valves only in closed-loop systems to prevent premature failure from dissolved oxygen and chlorine.
• Field Assembly: The actuator and valve body are designed for easy field assembly and disassembly without the need for specialized tools or complex commissioning.