Hello. I have a gas fired boiler. It's a hydrotherm vga-150b. I have four burners and would like to take them out to brush and clean prior to heating season. The electric current is off as well as the switch and gas valve right now. I tried to pull forward and back and upward but they do not come out. Not sure if there is a set screw. Any ideas? Thanks.
Vinny
Vinny