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STVZ ed 02/06 VICTRIX Zeus
Technical Documentation
Technical Documentation
Motorised 3-way valve.
is is a 3-way electric valve operating on the return pipe
of the primary circuit that permits, according to the type of
request (d.h.w. or central heating), running boiler water into
the central heating system or into the storage tank coil.
is 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
energising the motor (1).
Operation.
When the central heating or d.h.w. position has to be achieved,
the motor (1) is operated by the modulation board.
Operation of the motor, whose number of revs is reduced
by a special system of gears, involves rotation of a disc (6)
fastened eccentrically on the shaft of the motor.
Movement of this disc causes the movement of a special
coupling (5) which, at each 180° rotation, compresses (heating
position) or releases (d.h.w. position) the contrast spring of the
shutter (4).Hydraulic achievement of the required position
causes, alternately, the opening of a limit switch (2) and the
closing of the other.
is permits de-energising the motor and locking this in the
achieved position and enabling motor operation only when a
different request is made (d.h.w. or central heating signal).
PLANT RETURN
PUMP RETURN
COIL
RETURN
D.H.W.
SIGNAL
HEATING
SIGNAL
COMMON
PUMP RETURN
PLANT
RETURN
COIL
RETURN
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