Ideal Gas Valve Solenoid RC3/4 Inch ASCO 111566

The Ideal 111566 is a gas valve solenoid supplied in the RC3/4 inch ASCO pattern. It forms part of the gas valve assembly, the component that regulates gas distribution to the burner. When the electronic control determines that more gas is needed at the burner, it sends a signal to the gas valve, and the solenoid drives the valve open to release the gas.

The part is listed for Ideal Commercial boiler applications and is used across the Concord CXC and CXD families.

• The burner fails to light even though the control board is calling for heat.
• The gas valve does not open on demand and the boiler locks out on an ignition fault.
• The solenoid coil reads open circuit, or a resistance value well outside the expected figure for the coil.
• Firing is intermittent, or the valve can be heard clicking without gas passing through.
• Lockouts clear after a reset but return on the next call for heat.

• Check the GC number on the appliance data badge against the compatibility list before ordering.
• Confirm the marking on the existing solenoid to verify the RC3/4 inch ASCO pattern.
• Cross-reference the alternative number 1175502 when working from older documentation.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.