Introduction
This manual provides essential instructions for the safe and efficient installation, operation, and maintenance of the Carlin 50824 24 Volt Gas Valve. Please read this manual thoroughly before attempting any procedures to ensure proper function and to prevent potential hazards.
Important Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
- Installation and service must be performed by a qualified installer, service agency, or gas supplier.
- Always turn off the gas supply and electrical power before servicing the valve.
- Check for gas leaks after any service or installation.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Product Overview
The Carlin 50824 is a 24 Volt gas valve designed for controlling gas flow in compatible heating systems. It features a robust construction and is engineered for reliable performance. This valve is specifically designed for EZ Gas applications.

Figure 1: Carlin 50824 24 Volt Gas Valve. This image displays the gas valve unit, highlighting its main body, control knob, and electrical connection points.
Setup and Installation
Installation of the Carlin 50824 gas valve should only be performed by a qualified technician in accordance with all local codes and regulations.
Pre-Installation Checks:
- Verify that the gas type and pressure match the valve's specifications.
- Ensure the electrical supply is 24 Volts AC.
- Inspect the valve for any signs of damage from shipping.
- Confirm all necessary tools and fittings (e.g., Barb connection type) are available.
Installation Steps:
- Turn off Power and Gas: Disconnect all electrical power and shut off the main gas supply to the appliance.
- Remove Old Valve (if applicable): Carefully disconnect and remove the existing gas valve, if replacing.
- Mount New Valve: Securely mount the Carlin 50824 valve in the correct orientation, ensuring it is level.
- Connect Gas Lines: Connect the gas inlet and outlet lines to the valve using appropriate fittings. The valve uses Barb type connections. Ensure all connections are tight and leak-free.
- Wire Electrical Connections: Connect the 24 Volt AC wiring to the designated terminals on the valve. Refer to the appliance's wiring diagram for correct connections.
- Check for Leaks: After installation, slowly turn on the gas supply and check all gas connections for leaks using a suitable leak detection solution.
- Restore Power: Once all connections are secure and leak-free, restore electrical power to the appliance.
Operating Instructions
The Carlin 50824 gas valve operates in conjunction with your heating system's control board to regulate gas flow. Its primary function is to open and close to allow or restrict gas to the burner.
Basic Operation:
- When the thermostat calls for heat, the control board sends a 24 Volt signal to the gas valve.
- The valve opens, allowing gas to flow to the burner.
- Once the desired temperature is reached, the signal is removed, and the valve closes, shutting off the gas supply.
- Some models may feature a manual ON/OFF knob (as seen in Figure 1). Ensure this knob is in the "ON" position for automatic operation. For service or extended shutdown, turn it to "OFF".
Maintenance
Regular maintenance ensures the longevity and safe operation of your gas valve. All maintenance should be performed by a qualified service technician.
Recommended Maintenance:
- Annual Inspection: Have a qualified technician inspect the gas valve annually for signs of wear, corrosion, or leaks.
- Cleaning: Keep the area around the valve clean and free from dust and debris. Do not use harsh chemicals for cleaning.
- Operational Check: During annual service, ensure the valve opens and closes smoothly and reliably.
Do not attempt to disassemble or repair the gas valve yourself. Internal components are not user-serviceable.
Troubleshooting
If you experience issues with your Carlin 50824 gas valve, consult the table below for common problems and potential solutions. For complex issues, always contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| No gas flow to burner |
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| Irregular gas flow or burner ignition issues |
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Always ensure gas and electrical power are off before inspecting connections. If you suspect a gas leak, immediately shut off the main gas supply and ventilate the area. Do not operate any electrical switches or phones. Contact your gas supplier and a qualified technician.
Specifications
| Feature | Detail |
|---|---|
| Brand | Carlin |
| Model Number | 50824 |
| Voltage | 24 Volts |
| Application | EZ Gas |
| Inlet Connection Type | Barb |
| Outlet Connection Type | Barb |
| Number of Ports | 2 |
| Item Dimensions (L x W x H) | 3 x 2 x 2 inches |
| Item Weight | 2.37 pounds |
Warranty and Support
For specific warranty information regarding the Carlin 50824 24 Volt Gas Valve, please refer to the documentation provided with your purchase or contact Carlin directly. Warranty terms typically cover manufacturing defects for a specified period from the date of purchase.
For technical support, replacement parts, or service inquiries, please contact your authorized Carlin dealer or a qualified HVAC technician. You may also visit the official Carlin website for further assistance: www.carlincombustion.com





