Controller Siemens RVA66.540/101

Siemens RVA66.540/101 heating controller is designed for external control of a boiler and a heating zone with water heating. The RVA66.540/101 controller is considered a controller used for series installation directly on heat sources with a single-stage burner, a domestic hot water (DHW) charging pump, or a bypass valve of one heating zone with a circulation pump and a three-point controlled mixer drive or only with a pump.