EP 0197334 B1 19910206 - CIRCUIT TO CONTROL A FUEL-HEATED HEAT SOURCE
Title (en)
CIRCUIT TO CONTROL A FUEL-HEATED HEAT SOURCE
Publication
Application
Priority
DE 8507718 U 19850313
Abstract (en)
[origin: EP0197334A1] Circuit to control a gas-heated circulating water heater with a relay, the coil of which is connected to an operating voltage via at least one resistance, there being arranged parallel to the coil (15) of the relay both a capacitor (21) and a switch (23) of an air deficiency safety device, a second switch (11/12,30) lying in series with the relay coil (15) in such a manner that the relay has a self- holding circuit (12/13) and that the latter during self-holding separates the relay coil from the capacitor and from the switch (23) by means of the second switch, a third switch (17) being arranged in series with the relay coil (15) and it being possible to pick up a signal for the freeing of the fuel path (3) directly at the connections (7, 8) of the second switch (11/12 or 30). <IMAGE>
IPC 1-7
IPC 8 full level
F23N 5/18 (2006.01); F23N 5/24 (2006.01); F23N 5/20 (2006.01)
CPC (source: EP)
F23N 5/187 (2013.01); F23N 5/245 (2013.01); F23N 5/20 (2013.01); F23N 2233/06 (2020.01); F23N 2235/14 (2020.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0197334 A1 19861015; EP 0197334 B1 19910206; AT E60833 T1 19910215; DE 3677398 D1 19910314
DOCDB simple family (application)
EP 86103155 A 19860308; AT 86103155 T 19860308; DE 3677398 T 19860308