HOT-WATER HEATING SYSTEM Russian patent published in 2002 - IPC

FIELD: heating systems for dwelling houses, industrial and agricultural buildings. SUBSTANCE: hot-water heating includes heat generator, expansion tank, supply line, circulating pump, heating appliances and adjusting and shut-off valves. According to invention, heat-transfer agent temperature sensor is fitted in section of circulating line between heat generator and circulating pump; this sensor is electrically connected with relay unit for control of circulating pump and drain valve drives drain valve is provided with branch pipe whose free end is submerged in emergency reservoir located below circulating line; drain valve is mounted in circulating line before circulating pump. EFFECT: avoidance of breakage of individual members and system as a whole because of freezing of heat-transfer agent in case of disconnection of heat generator. 1 dwg