Ideal Gas Valve Imax Xtra F200-280-F400-560 174379

The Ideal 174379 is a gas valve supplied for Ideal Commercial Imax Xtra boilers. It sits in the gas train and controls the flow of gas to the burner, opening and closing on demand from the boiler's control sequence so that ignition and modulation happen at the correct point in the cycle. The valve is listed against the Imax Xtra F200, F280, F400 and F560 range and is also referenced under the alternative number 1781040.

• The burner fails to light even though the ignition sequence runs and the fan proves.
• Ignition is intermittent, with the boiler locking out on some start attempts but not others.
• The flame establishes and then drops out shortly after lighting.
• Gas pressure at the burner is unstable or cannot be set to the required figure.
• The valve body shows signs of sticking, or the coil fails to hold the valve open when energised.

• Confirm the boiler model and serial number against the compatibility list, as the Imax Xtra range covers several output sizes.
• Check the valve currently fitted against the alternative number 1781040 to make sure the correct item is being replaced.
• Inspect the gas train joints and seals at the time of replacement and renew any that are disturbed during the work.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.