| 摘要 |
<p>An instantaneous water heater with a water failure safety device with a by pass, and a temperature selector, has upstream of the temperature selector (24), a by pass (42) whose size is varied by operating a control device (30) and has a heat exchanger, the controlled (30) being a key of a valve forming also the seat (29) of the valve (29) of the temperature selector, this control being brought about through a channel (46) protecting the control screw (27) of the temperature selector. The top portion (61) of the controller (30) is accessible from outside, and the controller has a T shaped channel (42, 33). A valve in each branch opens or closes them depending on the pressure.</p> |
