| 摘要 |
PURPOSE:To simplify a wiring circuit, by connecting a main and a flow controllers to a relay terminal board by a remote cable which has less numbers of core wire, in a combustion safety controlling device of efficiency changeable, hot water supplier. CONSTITUTION:The combustion safety controlling device is equipped with a main controller MC, including a LSI device U2 and an IC device U1, consisting a main part of a flame detecting part FD, a flow controller FC, and a relay terminal board CP, connected to both MC and FC by the intermediary of remote cables RC1 and 2. In this case, a transistor Q1, which brings MC into a preparatory action for combustion at the time when a water current switch S4 or a flow switch S5 is turned to an ON condition, is provided to a main controller. In addition, a rotary switch with two circuits is provided, as capacity changing switches S2, S3, S6, and S7 of MC and FC, and a change signal can be fed into a relay terminal board CP from switches S6 and S7, only when switches S2 and S3 are in an OFF condition. |
