| 摘要 |
water is heated in a heating installation with a feed pipe and a return pipe. In the installation can be linked several heat sources, and one or more oil-fired boilers connected in a shunt. The heated water is fed into the heating installation forward feed pipe via a motor-driven shunt valve of the so-called 'increase-release' type, and is regulated by a control unit. To the control is connected a feed pipe temp. indicator (16) and a boiler temp. indicator. It is also connected to the oil boilers to start them by causing oil to be fed to the burners. Furthermore, the control is also coupled to a receding heat source and one which follows it and also to a suitable current supply system, e.g. phase and zero in a three-phase system. |
