Technical data

Technical documentation Technical documentation
STZS ed 06/03
11
ZEUS SUPERIOR
- MOTORIZED 3-WAY VALVE
This is a 3-way electric valve operating on the return pipe of the primary circuit that permits,
according to the type of request (domestic hot water or central heating), running boiler water into
the central heating system or into the storage tank coil
This depends on the position of the shutter (3) which impedes transit towards the system and at the
same time permits this towards the storage tank (d.h.w. position) or vice versa (central- heating
position).
Movement of the shutter (3) in both positions is achieved by energizing the motor (1).
Operation
To move to the heating or domestic
hot water circuit, the motor (1) is
activated by the control card.
Activating the motor, whose rpm is
reduced by a special gear system,
begins rotating a disc (6) with an
eccentric connection on the shaft of
that motor.
The moving disc activates a special
coupling (5) that, with each 180°
rotation, compresses (heating
position) or releases (domestic circuit
position) the plug valve contrast
spring (4).
Hydraulically reaching the requested position causes first one limit switch (2) to open and then
another to close.
This allows the voltage to be cut off to the motor, freezing it in the position reached and enabling
motor operation only when a different request (domestic circuit or heating signal) is received.