What is the clearance of ignition needle of Wieseman wall-hung boiler?

Wiesmann wall-hung boiler ignition pin specification is 3 to 4 mm ... According to the information of gas maintenance center, it is known that the ignition pin gauge of wiesmann wall-hung boiler is generally about 3 to 4 mm ... wiesmann wall-hung boiler is an efficient and energy-saving wall-hung boiler, which has the advantages of small size, easy installation, convenient operation, advanced temperature control system, long service life, safety and reliability, reasonable cost and so on, and is widely used in homes, office buildings, hotels and other places.