... it. ELB firing system uses 220 V alternate current, with “TEST” function, and each group ignite 25 ... well.(Un-auto systems need press the “TEST” button;If connecting products is parallel connection, ... or upwards firing system, Place the switch on ”TEST” position, if the exterior product in series, ... series) After testing is well-balanced, Put the TEST switch on "fire" position, press the corresponding ...